mirror of
https://sourceware.org/git/binutils-gdb.git
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9dad432e10
* Remove a stray semicolon * Restore dropped nullptr program argument in use of create_process() under CYGWIN
3096 lines
89 KiB
C
3096 lines
89 KiB
C
/* Target-vector operations for controlling windows child processes, for GDB.
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Copyright (C) 1995-2022 Free Software Foundation, Inc.
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Contributed by Cygnus Solutions, A Red Hat Company.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Originally by Steve Chamberlain, sac@cygnus.com */
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#include "defs.h"
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#include "frame.h" /* required by inferior.h */
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#include "inferior.h"
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#include "infrun.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "completer.h"
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#include "regcache.h"
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#include "top.h"
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#include <signal.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <windows.h>
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#include <imagehlp.h>
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#ifdef __CYGWIN__
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#include <wchar.h>
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#include <sys/cygwin.h>
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#include <cygwin/version.h>
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#endif
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#include <algorithm>
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#include <vector>
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#include "filenames.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "gdb_bfd.h"
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#include "gdbsupport/gdb_obstack.h"
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#include "gdbthread.h"
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#include "gdbcmd.h"
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#include <unistd.h>
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#include "exec.h"
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#include "solist.h"
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#include "solib.h"
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#include "xml-support.h"
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#include "inttypes.h"
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#include "i386-tdep.h"
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#include "i387-tdep.h"
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#include "windows-tdep.h"
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#include "windows-nat.h"
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#include "x86-nat.h"
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#include "complaints.h"
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#include "inf-child.h"
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#include "gdbsupport/gdb_tilde_expand.h"
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#include "gdbsupport/pathstuff.h"
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#include "gdbsupport/gdb_wait.h"
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#include "nat/windows-nat.h"
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#include "gdbsupport/symbol.h"
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using namespace windows_nat;
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/* Maintain a linked list of "so" information. */
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struct windows_solib
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{
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LPVOID load_addr = 0;
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CORE_ADDR text_offset = 0;
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/* Original name. */
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std::string original_name;
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/* Expanded form of the name. */
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std::string name;
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};
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struct windows_per_inferior : public windows_process_info
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{
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windows_thread_info *thread_rec (ptid_t ptid,
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thread_disposition_type disposition) override;
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int handle_output_debug_string (struct target_waitstatus *ourstatus) override;
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void handle_load_dll (const char *dll_name, LPVOID base) override;
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void handle_unload_dll () override;
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bool handle_access_violation (const EXCEPTION_RECORD *rec) override;
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int have_saved_context = 0; /* True if we've saved context from a
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cygwin signal. */
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uintptr_t dr[8] {};
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int windows_initialization_done = 0;
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std::vector<std::unique_ptr<windows_thread_info>> thread_list;
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/* Counts of things. */
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int saw_create = 0;
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int open_process_used = 0;
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#ifdef __x86_64__
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void *wow64_dbgbreak = nullptr;
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#endif
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/* This vector maps GDB's idea of a register's number into an offset
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in the windows exception context vector.
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It also contains the bit mask needed to load the register in question.
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The contents of this table can only be computed by the units
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that provide CPU-specific support for Windows native debugging.
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One day we could read a reg, we could inspect the context we
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already have loaded, if it doesn't have the bit set that we need,
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we read that set of registers in using GetThreadContext. If the
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context already contains what we need, we just unpack it. Then to
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write a register, first we have to ensure that the context contains
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the other regs of the group, and then we copy the info in and set
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out bit. */
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const int *mappings = nullptr;
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/* The function to use in order to determine whether a register is
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a segment register or not. */
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segment_register_p_ftype *segment_register_p = nullptr;
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std::vector<windows_solib> solibs;
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#ifdef __CYGWIN__
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CONTEXT saved_context {}; /* Contains the saved context from a
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cygwin signal. */
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/* The starting and ending address of the cygwin1.dll text segment. */
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CORE_ADDR cygwin_load_start = 0;
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CORE_ADDR cygwin_load_end = 0;
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#endif /* __CYGWIN__ */
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};
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/* The current process. */
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static windows_per_inferior windows_process;
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#undef STARTUPINFO
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#ifndef __CYGWIN__
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# define __PMAX (MAX_PATH + 1)
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# define STARTUPINFO STARTUPINFOA
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#else
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# define __PMAX PATH_MAX
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# define STARTUPINFO STARTUPINFOW
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#endif
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/* If we're not using the old Cygwin header file set, define the
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following which never should have been in the generic Win32 API
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headers in the first place since they were our own invention... */
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#ifndef _GNU_H_WINDOWS_H
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enum
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{
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FLAG_TRACE_BIT = 0x100,
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};
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#endif
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#ifndef CONTEXT_EXTENDED_REGISTERS
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/* This macro is only defined on ia32. It only makes sense on this target,
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so define it as zero if not already defined. */
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#define CONTEXT_EXTENDED_REGISTERS 0
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#endif
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#define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \
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| CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \
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| CONTEXT_EXTENDED_REGISTERS
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#define DR6_CLEAR_VALUE 0xffff0ff0
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/* The string sent by cygwin when it processes a signal.
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FIXME: This should be in a cygwin include file. */
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#ifndef _CYGWIN_SIGNAL_STRING
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#define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
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#endif
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#define CHECK(x) check (x, __FILE__,__LINE__)
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#define DEBUG_EXEC(fmt, ...) \
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debug_prefixed_printf_cond (debug_exec, "windows exec", fmt, ## __VA_ARGS__)
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#define DEBUG_EVENTS(fmt, ...) \
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debug_prefixed_printf_cond (debug_events, "windows events", fmt, \
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## __VA_ARGS__)
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#define DEBUG_MEM(fmt, ...) \
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debug_prefixed_printf_cond (debug_memory, "windows mem", fmt, \
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## __VA_ARGS__)
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#define DEBUG_EXCEPT(fmt, ...) \
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debug_prefixed_printf_cond (debug_exceptions, "windows except", fmt, \
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## __VA_ARGS__)
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static void cygwin_set_dr (int i, CORE_ADDR addr);
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static void cygwin_set_dr7 (unsigned long val);
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static CORE_ADDR cygwin_get_dr (int i);
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static unsigned long cygwin_get_dr6 (void);
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static unsigned long cygwin_get_dr7 (void);
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/* User options. */
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static bool new_console = false;
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#ifdef __CYGWIN__
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static bool cygwin_exceptions = false;
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#endif
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static bool new_group = true;
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static bool debug_exec = false; /* show execution */
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static bool debug_events = false; /* show events from kernel */
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static bool debug_memory = false; /* show target memory accesses */
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static bool debug_exceptions = false; /* show target exceptions */
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static bool useshell = false; /* use shell for subprocesses */
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/* See windows_nat_target::resume to understand why this is commented
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out. */
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#if 0
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/* This vector maps the target's idea of an exception (extracted
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from the DEBUG_EVENT structure) to GDB's idea. */
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struct xlate_exception
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{
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DWORD them;
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enum gdb_signal us;
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};
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static const struct xlate_exception xlate[] =
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{
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{EXCEPTION_ACCESS_VIOLATION, GDB_SIGNAL_SEGV},
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{STATUS_STACK_OVERFLOW, GDB_SIGNAL_SEGV},
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{EXCEPTION_BREAKPOINT, GDB_SIGNAL_TRAP},
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{DBG_CONTROL_C, GDB_SIGNAL_INT},
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{EXCEPTION_SINGLE_STEP, GDB_SIGNAL_TRAP},
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{STATUS_FLOAT_DIVIDE_BY_ZERO, GDB_SIGNAL_FPE}
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};
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#endif /* 0 */
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struct windows_nat_target final : public x86_nat_target<inf_child_target>
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{
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void close () override;
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void attach (const char *, int) override;
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bool attach_no_wait () override
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{ return true; }
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void detach (inferior *, int) override;
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void resume (ptid_t, int , enum gdb_signal) override;
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ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override;
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void fetch_registers (struct regcache *, int) override;
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void store_registers (struct regcache *, int) override;
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bool stopped_by_sw_breakpoint () override
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{
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windows_thread_info *th
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= windows_process.thread_rec (inferior_ptid, DONT_INVALIDATE_CONTEXT);
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return th->stopped_at_software_breakpoint;
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}
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bool supports_stopped_by_sw_breakpoint () override
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{
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return true;
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}
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enum target_xfer_status xfer_partial (enum target_object object,
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const char *annex,
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gdb_byte *readbuf,
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const gdb_byte *writebuf,
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ULONGEST offset, ULONGEST len,
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ULONGEST *xfered_len) override;
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void files_info () override;
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void kill () override;
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void create_inferior (const char *, const std::string &,
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char **, int) override;
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void mourn_inferior () override;
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bool thread_alive (ptid_t ptid) override;
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std::string pid_to_str (ptid_t) override;
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void interrupt () override;
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const char *pid_to_exec_file (int pid) override;
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ptid_t get_ada_task_ptid (long lwp, ULONGEST thread) override;
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bool get_tib_address (ptid_t ptid, CORE_ADDR *addr) override;
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const char *thread_name (struct thread_info *) override;
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int get_windows_debug_event (int pid, struct target_waitstatus *ourstatus);
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void do_initial_windows_stuff (DWORD pid, bool attaching);
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bool supports_disable_randomization () override
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{
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return disable_randomization_available ();
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}
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private:
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windows_thread_info *add_thread (ptid_t ptid, HANDLE h, void *tlb,
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bool main_thread_p);
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void delete_thread (ptid_t ptid, DWORD exit_code, bool main_thread_p);
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DWORD fake_create_process ();
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};
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static windows_nat_target the_windows_nat_target;
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static void
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check (BOOL ok, const char *file, int line)
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{
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if (!ok)
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gdb_printf ("error return %s:%d was %u\n", file, line,
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(unsigned) GetLastError ());
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}
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/* See nat/windows-nat.h. */
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windows_thread_info *
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windows_per_inferior::thread_rec
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(ptid_t ptid, thread_disposition_type disposition)
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{
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for (auto &th : thread_list)
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if (th->tid == ptid.lwp ())
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{
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if (!th->suspended)
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{
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switch (disposition)
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{
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case DONT_INVALIDATE_CONTEXT:
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/* Nothing. */
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break;
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case INVALIDATE_CONTEXT:
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if (ptid.lwp () != current_event.dwThreadId)
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th->suspend ();
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th->reload_context = true;
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break;
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case DONT_SUSPEND:
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th->reload_context = true;
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th->suspended = -1;
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break;
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}
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}
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return th.get ();
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}
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return NULL;
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}
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/* Add a thread to the thread list.
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PTID is the ptid of the thread to be added.
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H is its Windows handle.
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TLB is its thread local base.
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MAIN_THREAD_P should be true if the thread to be added is
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the main thread, false otherwise. */
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windows_thread_info *
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windows_nat_target::add_thread (ptid_t ptid, HANDLE h, void *tlb,
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bool main_thread_p)
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{
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windows_thread_info *th;
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gdb_assert (ptid.lwp () != 0);
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if ((th = windows_process.thread_rec (ptid, DONT_INVALIDATE_CONTEXT)))
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return th;
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CORE_ADDR base = (CORE_ADDR) (uintptr_t) tlb;
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#ifdef __x86_64__
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/* For WOW64 processes, this is actually the pointer to the 64bit TIB,
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and the 32bit TIB is exactly 2 pages after it. */
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if (windows_process.wow64_process)
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base += 0x2000;
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#endif
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th = new windows_thread_info (ptid.lwp (), h, base);
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windows_process.thread_list.emplace_back (th);
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/* Add this new thread to the list of threads.
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To be consistent with what's done on other platforms, we add
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the main thread silently (in reality, this thread is really
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more of a process to the user than a thread). */
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if (main_thread_p)
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add_thread_silent (this, ptid);
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else
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::add_thread (this, ptid);
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/* It's simplest to always set this and update the debug
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registers. */
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th->debug_registers_changed = true;
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return th;
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}
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/* Clear out any old thread list and reinitialize it to a
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pristine state. */
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static void
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windows_init_thread_list (void)
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{
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DEBUG_EVENTS ("called");
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windows_process.thread_list.clear ();
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}
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/* Delete a thread from the list of threads.
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PTID is the ptid of the thread to be deleted.
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EXIT_CODE is the thread's exit code.
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MAIN_THREAD_P should be true if the thread to be deleted is
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the main thread, false otherwise. */
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void
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windows_nat_target::delete_thread (ptid_t ptid, DWORD exit_code,
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bool main_thread_p)
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{
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DWORD id;
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gdb_assert (ptid.lwp () != 0);
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id = ptid.lwp ();
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/* Emit a notification about the thread being deleted.
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Note that no notification was printed when the main thread
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was created, and thus, unless in verbose mode, we should be
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symmetrical, and avoid that notification for the main thread
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here as well. */
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if (info_verbose)
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gdb_printf ("[Deleting %s]\n", target_pid_to_str (ptid).c_str ());
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else if (print_thread_events && !main_thread_p)
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gdb_printf (_("[%s exited with code %u]\n"),
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target_pid_to_str (ptid).c_str (),
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(unsigned) exit_code);
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::delete_thread (find_thread_ptid (&the_windows_nat_target, ptid));
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auto iter = std::find_if (windows_process.thread_list.begin (),
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windows_process.thread_list.end (),
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[=] (auto &th)
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{
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return th->tid == id;
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});
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if (iter != windows_process.thread_list.end ())
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windows_process.thread_list.erase (iter);
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}
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/* Fetches register number R from the given windows_thread_info,
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and supplies its value to the given regcache.
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This function assumes that R is non-negative. A failed assertion
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is raised if that is not true.
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This function assumes that TH->RELOAD_CONTEXT is not set, meaning
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that the windows_thread_info has an up-to-date context. A failed
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assertion is raised if that assumption is violated. */
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static void
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windows_fetch_one_register (struct regcache *regcache,
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windows_thread_info *th, int r)
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{
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gdb_assert (r >= 0);
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gdb_assert (!th->reload_context);
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char *context_ptr = (char *) &th->context;
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#ifdef __x86_64__
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if (windows_process.wow64_process)
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context_ptr = (char *) &th->wow64_context;
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#endif
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char *context_offset = context_ptr + windows_process.mappings[r];
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struct gdbarch *gdbarch = regcache->arch ();
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i386_gdbarch_tdep *tdep = (i386_gdbarch_tdep *) gdbarch_tdep (gdbarch);
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gdb_assert (!gdbarch_read_pc_p (gdbarch));
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gdb_assert (gdbarch_pc_regnum (gdbarch) >= 0);
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gdb_assert (!gdbarch_write_pc_p (gdbarch));
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if (r == I387_FISEG_REGNUM (tdep))
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{
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long l = *((long *) context_offset) & 0xffff;
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regcache->raw_supply (r, (char *) &l);
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}
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else if (r == I387_FOP_REGNUM (tdep))
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{
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long l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
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regcache->raw_supply (r, (char *) &l);
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}
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else if (windows_process.segment_register_p (r))
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{
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/* GDB treats segment registers as 32bit registers, but they are
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in fact only 16 bits long. Make sure we do not read extra
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bits from our source buffer. */
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long l = *((long *) context_offset) & 0xffff;
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regcache->raw_supply (r, (char *) &l);
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}
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else
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{
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if (th->stopped_at_software_breakpoint
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&& !th->pc_adjusted
|
|
&& r == gdbarch_pc_regnum (gdbarch))
|
|
{
|
|
int size = register_size (gdbarch, r);
|
|
if (size == 4)
|
|
{
|
|
uint32_t value;
|
|
memcpy (&value, context_offset, size);
|
|
value -= gdbarch_decr_pc_after_break (gdbarch);
|
|
memcpy (context_offset, &value, size);
|
|
}
|
|
else
|
|
{
|
|
gdb_assert (size == 8);
|
|
uint64_t value;
|
|
memcpy (&value, context_offset, size);
|
|
value -= gdbarch_decr_pc_after_break (gdbarch);
|
|
memcpy (context_offset, &value, size);
|
|
}
|
|
/* Make sure we only rewrite the PC a single time. */
|
|
th->pc_adjusted = true;
|
|
}
|
|
regcache->raw_supply (r, context_offset);
|
|
}
|
|
}
|
|
|
|
void
|
|
windows_nat_target::fetch_registers (struct regcache *regcache, int r)
|
|
{
|
|
windows_thread_info *th
|
|
= windows_process.thread_rec (regcache->ptid (), INVALIDATE_CONTEXT);
|
|
|
|
/* Check if TH exists. Windows sometimes uses a non-existent
|
|
thread id in its events. */
|
|
if (th == NULL)
|
|
return;
|
|
|
|
if (th->reload_context)
|
|
{
|
|
#ifdef __CYGWIN__
|
|
if (have_saved_context)
|
|
{
|
|
/* Lie about where the program actually is stopped since
|
|
cygwin has informed us that we should consider the signal
|
|
to have occurred at another location which is stored in
|
|
"saved_context. */
|
|
memcpy (&th->context, &saved_context,
|
|
__COPY_CONTEXT_SIZE);
|
|
have_saved_context = 0;
|
|
}
|
|
else
|
|
#endif
|
|
#ifdef __x86_64__
|
|
if (windows_process.wow64_process)
|
|
{
|
|
th->wow64_context.ContextFlags = CONTEXT_DEBUGGER_DR;
|
|
CHECK (Wow64GetThreadContext (th->h, &th->wow64_context));
|
|
/* Copy dr values from that thread.
|
|
But only if there were not modified since last stop.
|
|
PR gdb/2388 */
|
|
if (!th->debug_registers_changed)
|
|
{
|
|
windows_process.dr[0] = th->wow64_context.Dr0;
|
|
windows_process.dr[1] = th->wow64_context.Dr1;
|
|
windows_process.dr[2] = th->wow64_context.Dr2;
|
|
windows_process.dr[3] = th->wow64_context.Dr3;
|
|
windows_process.dr[6] = th->wow64_context.Dr6;
|
|
windows_process.dr[7] = th->wow64_context.Dr7;
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
th->context.ContextFlags = CONTEXT_DEBUGGER_DR;
|
|
CHECK (GetThreadContext (th->h, &th->context));
|
|
/* Copy dr values from that thread.
|
|
But only if there were not modified since last stop.
|
|
PR gdb/2388 */
|
|
if (!th->debug_registers_changed)
|
|
{
|
|
windows_process.dr[0] = th->context.Dr0;
|
|
windows_process.dr[1] = th->context.Dr1;
|
|
windows_process.dr[2] = th->context.Dr2;
|
|
windows_process.dr[3] = th->context.Dr3;
|
|
windows_process.dr[6] = th->context.Dr6;
|
|
windows_process.dr[7] = th->context.Dr7;
|
|
}
|
|
}
|
|
th->reload_context = false;
|
|
}
|
|
|
|
if (r < 0)
|
|
for (r = 0; r < gdbarch_num_regs (regcache->arch()); r++)
|
|
windows_fetch_one_register (regcache, th, r);
|
|
else
|
|
windows_fetch_one_register (regcache, th, r);
|
|
}
|
|
|
|
/* Collect the register number R from the given regcache, and store
|
|
its value into the corresponding area of the given thread's context.
|
|
|
|
This function assumes that R is non-negative. A failed assertion
|
|
assertion is raised if that is not true. */
|
|
|
|
static void
|
|
windows_store_one_register (const struct regcache *regcache,
|
|
windows_thread_info *th, int r)
|
|
{
|
|
gdb_assert (r >= 0);
|
|
|
|
char *context_ptr = (char *) &th->context;
|
|
#ifdef __x86_64__
|
|
if (windows_process.wow64_process)
|
|
context_ptr = (char *) &th->wow64_context;
|
|
#endif
|
|
|
|
regcache->raw_collect (r, context_ptr + windows_process.mappings[r]);
|
|
}
|
|
|
|
/* Store a new register value into the context of the thread tied to
|
|
REGCACHE. */
|
|
|
|
void
|
|
windows_nat_target::store_registers (struct regcache *regcache, int r)
|
|
{
|
|
windows_thread_info *th
|
|
= windows_process.thread_rec (regcache->ptid (), INVALIDATE_CONTEXT);
|
|
|
|
/* Check if TH exists. Windows sometimes uses a non-existent
|
|
thread id in its events. */
|
|
if (th == NULL)
|
|
return;
|
|
|
|
if (r < 0)
|
|
for (r = 0; r < gdbarch_num_regs (regcache->arch ()); r++)
|
|
windows_store_one_register (regcache, th, r);
|
|
else
|
|
windows_store_one_register (regcache, th, r);
|
|
}
|
|
|
|
/* See nat/windows-nat.h. */
|
|
|
|
static windows_solib *
|
|
windows_make_so (const char *name, LPVOID load_addr)
|
|
{
|
|
#ifndef __CYGWIN__
|
|
char *p;
|
|
char buf[__PMAX];
|
|
char cwd[__PMAX];
|
|
WIN32_FIND_DATA w32_fd;
|
|
HANDLE h = FindFirstFile(name, &w32_fd);
|
|
|
|
if (h == INVALID_HANDLE_VALUE)
|
|
strcpy (buf, name);
|
|
else
|
|
{
|
|
FindClose (h);
|
|
strcpy (buf, name);
|
|
if (GetCurrentDirectory (MAX_PATH + 1, cwd))
|
|
{
|
|
p = strrchr (buf, '\\');
|
|
if (p)
|
|
p[1] = '\0';
|
|
SetCurrentDirectory (buf);
|
|
GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p);
|
|
SetCurrentDirectory (cwd);
|
|
}
|
|
}
|
|
if (strcasecmp (buf, "ntdll.dll") == 0)
|
|
{
|
|
GetSystemDirectory (buf, sizeof (buf));
|
|
strcat (buf, "\\ntdll.dll");
|
|
}
|
|
#else
|
|
wchar_t buf[__PMAX];
|
|
|
|
buf[0] = 0;
|
|
if (access (name, F_OK) != 0)
|
|
{
|
|
if (strcasecmp (name, "ntdll.dll") == 0)
|
|
{
|
|
GetSystemDirectoryW (buf, sizeof (buf) / sizeof (wchar_t));
|
|
wcscat (buf, L"\\ntdll.dll");
|
|
}
|
|
}
|
|
#endif
|
|
windows_process.solibs.emplace_back ();
|
|
windows_solib *so = &windows_process.solibs.back ();
|
|
so->load_addr = load_addr;
|
|
so->original_name = name;
|
|
#ifndef __CYGWIN__
|
|
so->name = buf;
|
|
#else
|
|
if (buf[0])
|
|
{
|
|
char cname[SO_NAME_MAX_PATH_SIZE];
|
|
cygwin_conv_path (CCP_WIN_W_TO_POSIX, buf, cname,
|
|
SO_NAME_MAX_PATH_SIZE);
|
|
so->name = cname;
|
|
}
|
|
else
|
|
{
|
|
char *rname = realpath (name, NULL);
|
|
if (rname && strlen (rname) < SO_NAME_MAX_PATH_SIZE)
|
|
{
|
|
so->name = rname;
|
|
free (rname);
|
|
}
|
|
else
|
|
{
|
|
warning (_("dll path for \"%s\" too long or inaccessible"), name);
|
|
so->name = so->original_name;
|
|
}
|
|
}
|
|
/* Record cygwin1.dll .text start/end. */
|
|
size_t len = sizeof ("/cygwin1.dll") - 1;
|
|
if (so->name.size () >= len
|
|
&& strcasecmp (so->name.c_str () + so->name.size () - len,
|
|
"/cygwin1.dll") == 0)
|
|
{
|
|
asection *text = NULL;
|
|
|
|
gdb_bfd_ref_ptr abfd (gdb_bfd_open (so->name.c_str(), "pei-i386"));
|
|
|
|
if (abfd == NULL)
|
|
return so;
|
|
|
|
if (bfd_check_format (abfd.get (), bfd_object))
|
|
text = bfd_get_section_by_name (abfd.get (), ".text");
|
|
|
|
if (!text)
|
|
return so;
|
|
|
|
/* The symbols in a dll are offset by 0x1000, which is the
|
|
offset from 0 of the first byte in an image - because of the
|
|
file header and the section alignment. */
|
|
cygwin_load_start = (CORE_ADDR) (uintptr_t) ((char *)
|
|
load_addr + 0x1000);
|
|
cygwin_load_end = cygwin_load_start + bfd_section_size (text);
|
|
}
|
|
#endif
|
|
|
|
return so;
|
|
}
|
|
|
|
/* See nat/windows-nat.h. */
|
|
|
|
void
|
|
windows_per_inferior::handle_load_dll (const char *dll_name, LPVOID base)
|
|
{
|
|
windows_solib *solib = windows_make_so (dll_name, base);
|
|
DEBUG_EVENTS ("Loading dll \"%s\" at %s.", solib->name.c_str (),
|
|
host_address_to_string (solib->load_addr));
|
|
}
|
|
|
|
/* See nat/windows-nat.h. */
|
|
|
|
void
|
|
windows_per_inferior::handle_unload_dll ()
|
|
{
|
|
LPVOID lpBaseOfDll = current_event.u.UnloadDll.lpBaseOfDll;
|
|
|
|
auto iter = std::remove_if (windows_process.solibs.begin (),
|
|
windows_process.solibs.end (),
|
|
[&] (windows_solib &lib)
|
|
{
|
|
if (lib.load_addr == lpBaseOfDll)
|
|
{
|
|
DEBUG_EVENTS ("Unloading dll \"%s\".", lib.name.c_str ());
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
|
|
if (iter != windows_process.solibs.end ())
|
|
{
|
|
windows_process.solibs.erase (iter, windows_process.solibs.end ());
|
|
return;
|
|
}
|
|
|
|
/* We did not find any DLL that was previously loaded at this address,
|
|
so register a complaint. We do not report an error, because we have
|
|
observed that this may be happening under some circumstances. For
|
|
instance, running 32bit applications on x64 Windows causes us to receive
|
|
4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these
|
|
events are apparently caused by the WOW layer, the interface between
|
|
32bit and 64bit worlds). */
|
|
complaint (_("dll starting at %s not found."),
|
|
host_address_to_string (lpBaseOfDll));
|
|
}
|
|
|
|
/* Clear list of loaded DLLs. */
|
|
static void
|
|
windows_clear_solib (void)
|
|
{
|
|
windows_process.solibs.clear ();
|
|
}
|
|
|
|
static void
|
|
signal_event_command (const char *args, int from_tty)
|
|
{
|
|
uintptr_t event_id = 0;
|
|
char *endargs = NULL;
|
|
|
|
if (args == NULL)
|
|
error (_("signal-event requires an argument (integer event id)"));
|
|
|
|
event_id = strtoumax (args, &endargs, 10);
|
|
|
|
if ((errno == ERANGE) || (event_id == 0) || (event_id > UINTPTR_MAX) ||
|
|
((HANDLE) event_id == INVALID_HANDLE_VALUE))
|
|
error (_("Failed to convert `%s' to event id"), args);
|
|
|
|
SetEvent ((HANDLE) event_id);
|
|
CloseHandle ((HANDLE) event_id);
|
|
}
|
|
|
|
/* See nat/windows-nat.h. */
|
|
|
|
int
|
|
windows_per_inferior::handle_output_debug_string
|
|
(struct target_waitstatus *ourstatus)
|
|
{
|
|
int retval = 0;
|
|
|
|
gdb::unique_xmalloc_ptr<char> s
|
|
= (target_read_string
|
|
((CORE_ADDR) (uintptr_t) current_event.u.DebugString.lpDebugStringData,
|
|
1024));
|
|
if (s == nullptr || !*(s.get ()))
|
|
/* nothing to do */;
|
|
else if (!startswith (s.get (), _CYGWIN_SIGNAL_STRING))
|
|
{
|
|
#ifdef __CYGWIN__
|
|
if (!startswith (s.get (), "cYg"))
|
|
#endif
|
|
{
|
|
char *p = strchr (s.get (), '\0');
|
|
|
|
if (p > s.get () && *--p == '\n')
|
|
*p = '\0';
|
|
warning (("%s"), s.get ());
|
|
}
|
|
}
|
|
#ifdef __CYGWIN__
|
|
else
|
|
{
|
|
/* Got a cygwin signal marker. A cygwin signal is followed by
|
|
the signal number itself and then optionally followed by the
|
|
thread id and address to saved context within the DLL. If
|
|
these are supplied, then the given thread is assumed to have
|
|
issued the signal and the context from the thread is assumed
|
|
to be stored at the given address in the inferior. Tell gdb
|
|
to treat this like a real signal. */
|
|
char *p;
|
|
int sig = strtol (s.get () + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0);
|
|
gdb_signal gotasig = gdb_signal_from_host (sig);
|
|
|
|
if (gotasig)
|
|
{
|
|
LPCVOID x;
|
|
SIZE_T n;
|
|
|
|
ourstatus->set_stopped (gotasig);
|
|
retval = strtoul (p, &p, 0);
|
|
if (!retval)
|
|
retval = current_event.dwThreadId;
|
|
else if ((x = (LPCVOID) (uintptr_t) strtoull (p, NULL, 0))
|
|
&& ReadProcessMemory (handle, x,
|
|
&saved_context,
|
|
__COPY_CONTEXT_SIZE, &n)
|
|
&& n == __COPY_CONTEXT_SIZE)
|
|
have_saved_context = 1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int
|
|
display_selector (HANDLE thread, DWORD sel)
|
|
{
|
|
LDT_ENTRY info;
|
|
BOOL ret;
|
|
#ifdef __x86_64__
|
|
if (windows_process.wow64_process)
|
|
ret = Wow64GetThreadSelectorEntry (thread, sel, &info);
|
|
else
|
|
#endif
|
|
ret = GetThreadSelectorEntry (thread, sel, &info);
|
|
if (ret)
|
|
{
|
|
int base, limit;
|
|
gdb_printf ("0x%03x: ", (unsigned) sel);
|
|
if (!info.HighWord.Bits.Pres)
|
|
{
|
|
gdb_puts ("Segment not present\n");
|
|
return 0;
|
|
}
|
|
base = (info.HighWord.Bits.BaseHi << 24) +
|
|
(info.HighWord.Bits.BaseMid << 16)
|
|
+ info.BaseLow;
|
|
limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow;
|
|
if (info.HighWord.Bits.Granularity)
|
|
limit = (limit << 12) | 0xfff;
|
|
gdb_printf ("base=0x%08x limit=0x%08x", base, limit);
|
|
if (info.HighWord.Bits.Default_Big)
|
|
gdb_puts(" 32-bit ");
|
|
else
|
|
gdb_puts(" 16-bit ");
|
|
switch ((info.HighWord.Bits.Type & 0xf) >> 1)
|
|
{
|
|
case 0:
|
|
gdb_puts ("Data (Read-Only, Exp-up");
|
|
break;
|
|
case 1:
|
|
gdb_puts ("Data (Read/Write, Exp-up");
|
|
break;
|
|
case 2:
|
|
gdb_puts ("Unused segment (");
|
|
break;
|
|
case 3:
|
|
gdb_puts ("Data (Read/Write, Exp-down");
|
|
break;
|
|
case 4:
|
|
gdb_puts ("Code (Exec-Only, N.Conf");
|
|
break;
|
|
case 5:
|
|
gdb_puts ("Code (Exec/Read, N.Conf");
|
|
break;
|
|
case 6:
|
|
gdb_puts ("Code (Exec-Only, Conf");
|
|
break;
|
|
case 7:
|
|
gdb_puts ("Code (Exec/Read, Conf");
|
|
break;
|
|
default:
|
|
gdb_printf ("Unknown type 0x%lx",
|
|
(unsigned long) info.HighWord.Bits.Type);
|
|
}
|
|
if ((info.HighWord.Bits.Type & 0x1) == 0)
|
|
gdb_puts(", N.Acc");
|
|
gdb_puts (")\n");
|
|
if ((info.HighWord.Bits.Type & 0x10) == 0)
|
|
gdb_puts("System selector ");
|
|
gdb_printf ("Priviledge level = %ld. ",
|
|
(unsigned long) info.HighWord.Bits.Dpl);
|
|
if (info.HighWord.Bits.Granularity)
|
|
gdb_puts ("Page granular.\n");
|
|
else
|
|
gdb_puts ("Byte granular.\n");
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
DWORD err = GetLastError ();
|
|
if (err == ERROR_NOT_SUPPORTED)
|
|
gdb_printf ("Function not supported\n");
|
|
else
|
|
gdb_printf ("Invalid selector 0x%x.\n", (unsigned) sel);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
display_selectors (const char * args, int from_tty)
|
|
{
|
|
if (inferior_ptid == null_ptid)
|
|
{
|
|
gdb_puts ("Impossible to display selectors now.\n");
|
|
return;
|
|
}
|
|
|
|
windows_thread_info *current_windows_thread
|
|
= windows_process.thread_rec (inferior_ptid, DONT_INVALIDATE_CONTEXT);
|
|
|
|
if (!args)
|
|
{
|
|
#ifdef __x86_64__
|
|
if (windows_process.wow64_process)
|
|
{
|
|
gdb_puts ("Selector $cs\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->wow64_context.SegCs);
|
|
gdb_puts ("Selector $ds\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->wow64_context.SegDs);
|
|
gdb_puts ("Selector $es\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->wow64_context.SegEs);
|
|
gdb_puts ("Selector $ss\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->wow64_context.SegSs);
|
|
gdb_puts ("Selector $fs\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->wow64_context.SegFs);
|
|
gdb_puts ("Selector $gs\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->wow64_context.SegGs);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
gdb_puts ("Selector $cs\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->context.SegCs);
|
|
gdb_puts ("Selector $ds\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->context.SegDs);
|
|
gdb_puts ("Selector $es\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->context.SegEs);
|
|
gdb_puts ("Selector $ss\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->context.SegSs);
|
|
gdb_puts ("Selector $fs\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->context.SegFs);
|
|
gdb_puts ("Selector $gs\n");
|
|
display_selector (current_windows_thread->h,
|
|
current_windows_thread->context.SegGs);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
int sel;
|
|
sel = parse_and_eval_long (args);
|
|
gdb_printf ("Selector \"%s\"\n",args);
|
|
display_selector (current_windows_thread->h, sel);
|
|
}
|
|
}
|
|
|
|
/* See nat/windows-nat.h. */
|
|
|
|
bool
|
|
windows_per_inferior::handle_access_violation
|
|
(const EXCEPTION_RECORD *rec)
|
|
{
|
|
#ifdef __CYGWIN__
|
|
/* See if the access violation happened within the cygwin DLL
|
|
itself. Cygwin uses a kind of exception handling to deal with
|
|
passed-in invalid addresses. gdb should not treat these as real
|
|
SEGVs since they will be silently handled by cygwin. A real SEGV
|
|
will (theoretically) be caught by cygwin later in the process and
|
|
will be sent as a cygwin-specific-signal. So, ignore SEGVs if
|
|
they show up within the text segment of the DLL itself. */
|
|
const char *fn;
|
|
CORE_ADDR addr = (CORE_ADDR) (uintptr_t) rec->ExceptionAddress;
|
|
|
|
if ((!cygwin_exceptions && (addr >= cygwin_load_start
|
|
&& addr < cygwin_load_end))
|
|
|| (find_pc_partial_function (addr, &fn, NULL, NULL)
|
|
&& startswith (fn, "KERNEL32!IsBad")))
|
|
return true;
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
/* Resume thread specified by ID, or all artificially suspended
|
|
threads, if we are continuing execution. KILLED non-zero means we
|
|
have killed the inferior, so we should ignore weird errors due to
|
|
threads shutting down. */
|
|
static BOOL
|
|
windows_continue (DWORD continue_status, int id, int killed)
|
|
{
|
|
BOOL res;
|
|
|
|
windows_process.desired_stop_thread_id = id;
|
|
|
|
if (windows_process.matching_pending_stop (debug_events))
|
|
return TRUE;
|
|
|
|
for (auto &th : windows_process.thread_list)
|
|
if (id == -1 || id == (int) th->tid)
|
|
{
|
|
#ifdef __x86_64__
|
|
if (windows_process.wow64_process)
|
|
{
|
|
if (th->debug_registers_changed)
|
|
{
|
|
th->wow64_context.ContextFlags |= CONTEXT_DEBUG_REGISTERS;
|
|
th->wow64_context.Dr0 = windows_process.dr[0];
|
|
th->wow64_context.Dr1 = windows_process.dr[1];
|
|
th->wow64_context.Dr2 = windows_process.dr[2];
|
|
th->wow64_context.Dr3 = windows_process.dr[3];
|
|
th->wow64_context.Dr6 = DR6_CLEAR_VALUE;
|
|
th->wow64_context.Dr7 = windows_process.dr[7];
|
|
th->debug_registers_changed = false;
|
|
}
|
|
if (th->wow64_context.ContextFlags)
|
|
{
|
|
DWORD ec = 0;
|
|
|
|
if (GetExitCodeThread (th->h, &ec)
|
|
&& ec == STILL_ACTIVE)
|
|
{
|
|
BOOL status = Wow64SetThreadContext (th->h,
|
|
&th->wow64_context);
|
|
|
|
if (!killed)
|
|
CHECK (status);
|
|
}
|
|
th->wow64_context.ContextFlags = 0;
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
if (th->debug_registers_changed)
|
|
{
|
|
th->context.ContextFlags |= CONTEXT_DEBUG_REGISTERS;
|
|
th->context.Dr0 = windows_process.dr[0];
|
|
th->context.Dr1 = windows_process.dr[1];
|
|
th->context.Dr2 = windows_process.dr[2];
|
|
th->context.Dr3 = windows_process.dr[3];
|
|
th->context.Dr6 = DR6_CLEAR_VALUE;
|
|
th->context.Dr7 = windows_process.dr[7];
|
|
th->debug_registers_changed = false;
|
|
}
|
|
if (th->context.ContextFlags)
|
|
{
|
|
DWORD ec = 0;
|
|
|
|
if (GetExitCodeThread (th->h, &ec)
|
|
&& ec == STILL_ACTIVE)
|
|
{
|
|
BOOL status = SetThreadContext (th->h, &th->context);
|
|
|
|
if (!killed)
|
|
CHECK (status);
|
|
}
|
|
th->context.ContextFlags = 0;
|
|
}
|
|
}
|
|
th->resume ();
|
|
}
|
|
else
|
|
{
|
|
/* When single-stepping a specific thread, other threads must
|
|
be suspended. */
|
|
th->suspend ();
|
|
}
|
|
|
|
res = continue_last_debug_event (continue_status, debug_events);
|
|
|
|
if (!res)
|
|
error (_("Failed to resume program execution"
|
|
" (ContinueDebugEvent failed, error %u)"),
|
|
(unsigned int) GetLastError ());
|
|
|
|
return res;
|
|
}
|
|
|
|
/* Called in pathological case where Windows fails to send a
|
|
CREATE_PROCESS_DEBUG_EVENT after an attach. */
|
|
DWORD
|
|
windows_nat_target::fake_create_process ()
|
|
{
|
|
windows_process.handle
|
|
= OpenProcess (PROCESS_ALL_ACCESS, FALSE,
|
|
windows_process.current_event.dwProcessId);
|
|
if (windows_process.handle != NULL)
|
|
windows_process.open_process_used = 1;
|
|
else
|
|
{
|
|
error (_("OpenProcess call failed, GetLastError = %u"),
|
|
(unsigned) GetLastError ());
|
|
/* We can not debug anything in that case. */
|
|
}
|
|
add_thread (ptid_t (windows_process.current_event.dwProcessId, 0,
|
|
windows_process.current_event.dwThreadId),
|
|
windows_process.current_event.u.CreateThread.hThread,
|
|
windows_process.current_event.u.CreateThread.lpThreadLocalBase,
|
|
true /* main_thread_p */);
|
|
return windows_process.current_event.dwThreadId;
|
|
}
|
|
|
|
void
|
|
windows_nat_target::resume (ptid_t ptid, int step, enum gdb_signal sig)
|
|
{
|
|
windows_thread_info *th;
|
|
DWORD continue_status = DBG_CONTINUE;
|
|
|
|
/* A specific PTID means `step only this thread id'. */
|
|
int resume_all = ptid == minus_one_ptid;
|
|
|
|
/* If we're continuing all threads, it's the current inferior that
|
|
should be handled specially. */
|
|
if (resume_all)
|
|
ptid = inferior_ptid;
|
|
|
|
if (sig != GDB_SIGNAL_0)
|
|
{
|
|
if (windows_process.current_event.dwDebugEventCode
|
|
!= EXCEPTION_DEBUG_EVENT)
|
|
{
|
|
DEBUG_EXCEPT ("Cannot continue with signal %d here.", sig);
|
|
}
|
|
else if (sig == windows_process.last_sig)
|
|
continue_status = DBG_EXCEPTION_NOT_HANDLED;
|
|
else
|
|
#if 0
|
|
/* This code does not seem to work, because
|
|
the kernel does probably not consider changes in the ExceptionRecord
|
|
structure when passing the exception to the inferior.
|
|
Note that this seems possible in the exception handler itself. */
|
|
{
|
|
for (const xlate_exception &x : xlate)
|
|
if (x.us == sig)
|
|
{
|
|
current_event.u.Exception.ExceptionRecord.ExceptionCode
|
|
= x.them;
|
|
continue_status = DBG_EXCEPTION_NOT_HANDLED;
|
|
break;
|
|
}
|
|
if (continue_status == DBG_CONTINUE)
|
|
{
|
|
DEBUG_EXCEPT ("Cannot continue with signal %d.", sig);
|
|
}
|
|
}
|
|
#endif
|
|
DEBUG_EXCEPT ("Can only continue with received signal %d.",
|
|
windows_process.last_sig);
|
|
}
|
|
|
|
windows_process.last_sig = GDB_SIGNAL_0;
|
|
|
|
DEBUG_EXEC ("pid=%d, tid=0x%x, step=%d, sig=%d",
|
|
ptid.pid (), (unsigned) ptid.lwp (), step, sig);
|
|
|
|
/* Get context for currently selected thread. */
|
|
th = windows_process.thread_rec (inferior_ptid, DONT_INVALIDATE_CONTEXT);
|
|
if (th)
|
|
{
|
|
#ifdef __x86_64__
|
|
if (windows_process.wow64_process)
|
|
{
|
|
if (step)
|
|
{
|
|
/* Single step by setting t bit. */
|
|
struct regcache *regcache = get_current_regcache ();
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
fetch_registers (regcache, gdbarch_ps_regnum (gdbarch));
|
|
th->wow64_context.EFlags |= FLAG_TRACE_BIT;
|
|
}
|
|
|
|
if (th->wow64_context.ContextFlags)
|
|
{
|
|
if (th->debug_registers_changed)
|
|
{
|
|
th->wow64_context.Dr0 = windows_process.dr[0];
|
|
th->wow64_context.Dr1 = windows_process.dr[1];
|
|
th->wow64_context.Dr2 = windows_process.dr[2];
|
|
th->wow64_context.Dr3 = windows_process.dr[3];
|
|
th->wow64_context.Dr6 = DR6_CLEAR_VALUE;
|
|
th->wow64_context.Dr7 = windows_process.dr[7];
|
|
th->debug_registers_changed = false;
|
|
}
|
|
CHECK (Wow64SetThreadContext (th->h, &th->wow64_context));
|
|
th->wow64_context.ContextFlags = 0;
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
if (step)
|
|
{
|
|
/* Single step by setting t bit. */
|
|
struct regcache *regcache = get_current_regcache ();
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
fetch_registers (regcache, gdbarch_ps_regnum (gdbarch));
|
|
th->context.EFlags |= FLAG_TRACE_BIT;
|
|
}
|
|
|
|
if (th->context.ContextFlags)
|
|
{
|
|
if (th->debug_registers_changed)
|
|
{
|
|
th->context.Dr0 = windows_process.dr[0];
|
|
th->context.Dr1 = windows_process.dr[1];
|
|
th->context.Dr2 = windows_process.dr[2];
|
|
th->context.Dr3 = windows_process.dr[3];
|
|
th->context.Dr6 = DR6_CLEAR_VALUE;
|
|
th->context.Dr7 = windows_process.dr[7];
|
|
th->debug_registers_changed = false;
|
|
}
|
|
CHECK (SetThreadContext (th->h, &th->context));
|
|
th->context.ContextFlags = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Allow continuing with the same signal that interrupted us.
|
|
Otherwise complain. */
|
|
|
|
if (resume_all)
|
|
windows_continue (continue_status, -1, 0);
|
|
else
|
|
windows_continue (continue_status, ptid.lwp (), 0);
|
|
}
|
|
|
|
/* Ctrl-C handler used when the inferior is not run in the same console. The
|
|
handler is in charge of interrupting the inferior using DebugBreakProcess.
|
|
Note that this function is not available prior to Windows XP. In this case
|
|
we emit a warning. */
|
|
static BOOL WINAPI
|
|
ctrl_c_handler (DWORD event_type)
|
|
{
|
|
const int attach_flag = current_inferior ()->attach_flag;
|
|
|
|
/* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */
|
|
if (event_type != CTRL_C_EVENT && event_type != CTRL_BREAK_EVENT)
|
|
return FALSE;
|
|
|
|
/* If the inferior and the debugger share the same console, do nothing as
|
|
the inferior has also received the Ctrl-C event. */
|
|
if (!new_console && !attach_flag)
|
|
return TRUE;
|
|
|
|
#ifdef __x86_64__
|
|
if (windows_process.wow64_process)
|
|
{
|
|
/* Call DbgUiRemoteBreakin of the 32bit ntdll.dll in the target process.
|
|
DebugBreakProcess would call the one of the 64bit ntdll.dll, which
|
|
can't be correctly handled by gdb. */
|
|
if (windows_process.wow64_dbgbreak == nullptr)
|
|
{
|
|
CORE_ADDR addr;
|
|
if (!find_minimal_symbol_address ("ntdll!DbgUiRemoteBreakin",
|
|
&addr, 0))
|
|
windows_process.wow64_dbgbreak = (void *) addr;
|
|
}
|
|
|
|
if (windows_process.wow64_dbgbreak != nullptr)
|
|
{
|
|
HANDLE thread = CreateRemoteThread (windows_process.handle, NULL,
|
|
0, (LPTHREAD_START_ROUTINE)
|
|
windows_process.wow64_dbgbreak,
|
|
NULL, 0, NULL);
|
|
if (thread)
|
|
CloseHandle (thread);
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
if (!DebugBreakProcess (windows_process.handle))
|
|
warning (_("Could not interrupt program. "
|
|
"Press Ctrl-c in the program console."));
|
|
}
|
|
|
|
/* Return true to tell that Ctrl-C has been handled. */
|
|
return TRUE;
|
|
}
|
|
|
|
/* Get the next event from the child. Returns a non-zero thread id if the event
|
|
requires handling by WFI (or whatever). */
|
|
|
|
int
|
|
windows_nat_target::get_windows_debug_event (int pid,
|
|
struct target_waitstatus *ourstatus)
|
|
{
|
|
BOOL debug_event;
|
|
DWORD continue_status, event_code;
|
|
DWORD thread_id = 0;
|
|
|
|
/* If there is a relevant pending stop, report it now. See the
|
|
comment by the definition of "pending_stops" for details on why
|
|
this is needed. */
|
|
gdb::optional<pending_stop> stop
|
|
= windows_process.fetch_pending_stop (debug_events);
|
|
if (stop.has_value ())
|
|
{
|
|
thread_id = stop->thread_id;
|
|
*ourstatus = stop->status;
|
|
|
|
ptid_t ptid (windows_process.current_event.dwProcessId, thread_id);
|
|
windows_thread_info *th
|
|
= windows_process.thread_rec (ptid, INVALIDATE_CONTEXT);
|
|
th->reload_context = true;
|
|
|
|
return thread_id;
|
|
}
|
|
|
|
windows_process.last_sig = GDB_SIGNAL_0;
|
|
DEBUG_EVENT *current_event = &windows_process.current_event;
|
|
|
|
if (!(debug_event = wait_for_debug_event (&windows_process.current_event,
|
|
1000)))
|
|
goto out;
|
|
|
|
continue_status = DBG_CONTINUE;
|
|
|
|
event_code = windows_process.current_event.dwDebugEventCode;
|
|
ourstatus->set_spurious ();
|
|
windows_process.have_saved_context = 0;
|
|
|
|
switch (event_code)
|
|
{
|
|
case CREATE_THREAD_DEBUG_EVENT:
|
|
DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
|
|
(unsigned) current_event->dwProcessId,
|
|
(unsigned) current_event->dwThreadId,
|
|
"CREATE_THREAD_DEBUG_EVENT");
|
|
if (windows_process.saw_create != 1)
|
|
{
|
|
inferior *inf = find_inferior_pid (this, current_event->dwProcessId);
|
|
if (!windows_process.saw_create && inf->attach_flag)
|
|
{
|
|
/* Kludge around a Windows bug where first event is a create
|
|
thread event. Caused when attached process does not have
|
|
a main thread. */
|
|
thread_id = fake_create_process ();
|
|
if (thread_id)
|
|
windows_process.saw_create++;
|
|
}
|
|
break;
|
|
}
|
|
/* Record the existence of this thread. */
|
|
thread_id = current_event->dwThreadId;
|
|
add_thread
|
|
(ptid_t (current_event->dwProcessId, current_event->dwThreadId, 0),
|
|
current_event->u.CreateThread.hThread,
|
|
current_event->u.CreateThread.lpThreadLocalBase,
|
|
false /* main_thread_p */);
|
|
|
|
break;
|
|
|
|
case EXIT_THREAD_DEBUG_EVENT:
|
|
DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
|
|
(unsigned) current_event->dwProcessId,
|
|
(unsigned) current_event->dwThreadId,
|
|
"EXIT_THREAD_DEBUG_EVENT");
|
|
delete_thread (ptid_t (current_event->dwProcessId,
|
|
current_event->dwThreadId, 0),
|
|
current_event->u.ExitThread.dwExitCode,
|
|
false /* main_thread_p */);
|
|
break;
|
|
|
|
case CREATE_PROCESS_DEBUG_EVENT:
|
|
DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
|
|
(unsigned) current_event->dwProcessId,
|
|
(unsigned) current_event->dwThreadId,
|
|
"CREATE_PROCESS_DEBUG_EVENT");
|
|
CloseHandle (current_event->u.CreateProcessInfo.hFile);
|
|
if (++windows_process.saw_create != 1)
|
|
break;
|
|
|
|
windows_process.handle = current_event->u.CreateProcessInfo.hProcess;
|
|
/* Add the main thread. */
|
|
add_thread
|
|
(ptid_t (current_event->dwProcessId,
|
|
current_event->dwThreadId, 0),
|
|
current_event->u.CreateProcessInfo.hThread,
|
|
current_event->u.CreateProcessInfo.lpThreadLocalBase,
|
|
true /* main_thread_p */);
|
|
thread_id = current_event->dwThreadId;
|
|
break;
|
|
|
|
case EXIT_PROCESS_DEBUG_EVENT:
|
|
DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
|
|
(unsigned) current_event->dwProcessId,
|
|
(unsigned) current_event->dwThreadId,
|
|
"EXIT_PROCESS_DEBUG_EVENT");
|
|
if (!windows_process.windows_initialization_done)
|
|
{
|
|
target_terminal::ours ();
|
|
target_mourn_inferior (inferior_ptid);
|
|
error (_("During startup program exited with code 0x%x."),
|
|
(unsigned int) current_event->u.ExitProcess.dwExitCode);
|
|
}
|
|
else if (windows_process.saw_create == 1)
|
|
{
|
|
delete_thread (ptid_t (current_event->dwProcessId,
|
|
current_event->dwThreadId, 0),
|
|
0, true /* main_thread_p */);
|
|
DWORD exit_status = current_event->u.ExitProcess.dwExitCode;
|
|
/* If the exit status looks like a fatal exception, but we
|
|
don't recognize the exception's code, make the original
|
|
exit status value available, to avoid losing
|
|
information. */
|
|
int exit_signal
|
|
= WIFSIGNALED (exit_status) ? WTERMSIG (exit_status) : -1;
|
|
if (exit_signal == -1)
|
|
ourstatus->set_exited (exit_status);
|
|
else
|
|
ourstatus->set_signalled (gdb_signal_from_host (exit_signal));
|
|
|
|
thread_id = current_event->dwThreadId;
|
|
}
|
|
break;
|
|
|
|
case LOAD_DLL_DEBUG_EVENT:
|
|
DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
|
|
(unsigned) current_event->dwProcessId,
|
|
(unsigned) current_event->dwThreadId,
|
|
"LOAD_DLL_DEBUG_EVENT");
|
|
CloseHandle (current_event->u.LoadDll.hFile);
|
|
if (windows_process.saw_create != 1
|
|
|| ! windows_process.windows_initialization_done)
|
|
break;
|
|
try
|
|
{
|
|
windows_process.dll_loaded_event ();
|
|
}
|
|
catch (const gdb_exception &ex)
|
|
{
|
|
exception_print (gdb_stderr, ex);
|
|
}
|
|
ourstatus->set_loaded ();
|
|
thread_id = current_event->dwThreadId;
|
|
break;
|
|
|
|
case UNLOAD_DLL_DEBUG_EVENT:
|
|
DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
|
|
(unsigned) current_event->dwProcessId,
|
|
(unsigned) current_event->dwThreadId,
|
|
"UNLOAD_DLL_DEBUG_EVENT");
|
|
if (windows_process.saw_create != 1
|
|
|| ! windows_process.windows_initialization_done)
|
|
break;
|
|
try
|
|
{
|
|
windows_process.handle_unload_dll ();
|
|
}
|
|
catch (const gdb_exception &ex)
|
|
{
|
|
exception_print (gdb_stderr, ex);
|
|
}
|
|
ourstatus->set_loaded ();
|
|
thread_id = current_event->dwThreadId;
|
|
break;
|
|
|
|
case EXCEPTION_DEBUG_EVENT:
|
|
DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
|
|
(unsigned) current_event->dwProcessId,
|
|
(unsigned) current_event->dwThreadId,
|
|
"EXCEPTION_DEBUG_EVENT");
|
|
if (windows_process.saw_create != 1)
|
|
break;
|
|
switch (windows_process.handle_exception (ourstatus, debug_exceptions))
|
|
{
|
|
case HANDLE_EXCEPTION_UNHANDLED:
|
|
default:
|
|
continue_status = DBG_EXCEPTION_NOT_HANDLED;
|
|
break;
|
|
case HANDLE_EXCEPTION_HANDLED:
|
|
thread_id = current_event->dwThreadId;
|
|
break;
|
|
case HANDLE_EXCEPTION_IGNORED:
|
|
continue_status = DBG_CONTINUE;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case OUTPUT_DEBUG_STRING_EVENT: /* Message from the kernel. */
|
|
DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
|
|
(unsigned) current_event->dwProcessId,
|
|
(unsigned) current_event->dwThreadId,
|
|
"OUTPUT_DEBUG_STRING_EVENT");
|
|
if (windows_process.saw_create != 1)
|
|
break;
|
|
thread_id = windows_process.handle_output_debug_string (ourstatus);
|
|
break;
|
|
|
|
default:
|
|
if (windows_process.saw_create != 1)
|
|
break;
|
|
gdb_printf ("gdb: kernel event for pid=%u tid=0x%x\n",
|
|
(unsigned) current_event->dwProcessId,
|
|
(unsigned) current_event->dwThreadId);
|
|
gdb_printf (" unknown event code %u\n",
|
|
(unsigned) current_event->dwDebugEventCode);
|
|
break;
|
|
}
|
|
|
|
if (!thread_id || windows_process.saw_create != 1)
|
|
{
|
|
CHECK (windows_continue (continue_status,
|
|
windows_process.desired_stop_thread_id, 0));
|
|
}
|
|
else if (windows_process.desired_stop_thread_id != -1
|
|
&& windows_process.desired_stop_thread_id != thread_id)
|
|
{
|
|
/* Pending stop. See the comment by the definition of
|
|
"pending_stops" for details on why this is needed. */
|
|
DEBUG_EVENTS ("get_windows_debug_event - "
|
|
"unexpected stop in 0x%x (expecting 0x%x)",
|
|
thread_id, windows_process.desired_stop_thread_id);
|
|
|
|
if (current_event->dwDebugEventCode == EXCEPTION_DEBUG_EVENT
|
|
&& ((current_event->u.Exception.ExceptionRecord.ExceptionCode
|
|
== EXCEPTION_BREAKPOINT)
|
|
|| (current_event->u.Exception.ExceptionRecord.ExceptionCode
|
|
== STATUS_WX86_BREAKPOINT))
|
|
&& windows_process.windows_initialization_done)
|
|
{
|
|
ptid_t ptid = ptid_t (current_event->dwProcessId, thread_id, 0);
|
|
windows_thread_info *th
|
|
= windows_process.thread_rec (ptid, INVALIDATE_CONTEXT);
|
|
th->stopped_at_software_breakpoint = true;
|
|
th->pc_adjusted = false;
|
|
}
|
|
windows_process.pending_stops.push_back
|
|
({thread_id, *ourstatus, windows_process.current_event});
|
|
thread_id = 0;
|
|
CHECK (windows_continue (continue_status,
|
|
windows_process.desired_stop_thread_id, 0));
|
|
}
|
|
|
|
out:
|
|
return thread_id;
|
|
}
|
|
|
|
/* Wait for interesting events to occur in the target process. */
|
|
ptid_t
|
|
windows_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
|
|
target_wait_flags options)
|
|
{
|
|
int pid = -1;
|
|
|
|
/* We loop when we get a non-standard exception rather than return
|
|
with a SPURIOUS because resume can try and step or modify things,
|
|
which needs a current_thread->h. But some of these exceptions mark
|
|
the birth or death of threads, which mean that the current thread
|
|
isn't necessarily what you think it is. */
|
|
|
|
while (1)
|
|
{
|
|
int retval;
|
|
|
|
/* If the user presses Ctrl-c while the debugger is waiting
|
|
for an event, he expects the debugger to interrupt his program
|
|
and to get the prompt back. There are two possible situations:
|
|
|
|
- The debugger and the program do not share the console, in
|
|
which case the Ctrl-c event only reached the debugger.
|
|
In that case, the ctrl_c handler will take care of interrupting
|
|
the inferior. Note that this case is working starting with
|
|
Windows XP. For Windows 2000, Ctrl-C should be pressed in the
|
|
inferior console.
|
|
|
|
- The debugger and the program share the same console, in which
|
|
case both debugger and inferior will receive the Ctrl-c event.
|
|
In that case the ctrl_c handler will ignore the event, as the
|
|
Ctrl-c event generated inside the inferior will trigger the
|
|
expected debug event.
|
|
|
|
FIXME: brobecker/2008-05-20: If the inferior receives the
|
|
signal first and the delay until GDB receives that signal
|
|
is sufficiently long, GDB can sometimes receive the SIGINT
|
|
after we have unblocked the CTRL+C handler. This would
|
|
lead to the debugger stopping prematurely while handling
|
|
the new-thread event that comes with the handling of the SIGINT
|
|
inside the inferior, and then stop again immediately when
|
|
the user tries to resume the execution in the inferior.
|
|
This is a classic race that we should try to fix one day. */
|
|
SetConsoleCtrlHandler (&ctrl_c_handler, TRUE);
|
|
retval = get_windows_debug_event (pid, ourstatus);
|
|
SetConsoleCtrlHandler (&ctrl_c_handler, FALSE);
|
|
|
|
if (retval)
|
|
{
|
|
ptid_t result = ptid_t (windows_process.current_event.dwProcessId,
|
|
retval, 0);
|
|
|
|
if (ourstatus->kind () != TARGET_WAITKIND_EXITED
|
|
&& ourstatus->kind () != TARGET_WAITKIND_SIGNALLED)
|
|
{
|
|
windows_thread_info *th
|
|
= windows_process.thread_rec (result, INVALIDATE_CONTEXT);
|
|
|
|
if (th != nullptr)
|
|
{
|
|
th->stopped_at_software_breakpoint = false;
|
|
if (windows_process.current_event.dwDebugEventCode
|
|
== EXCEPTION_DEBUG_EVENT
|
|
&& ((windows_process.current_event.u.Exception.ExceptionRecord.ExceptionCode
|
|
== EXCEPTION_BREAKPOINT)
|
|
|| (windows_process.current_event.u.Exception.ExceptionRecord.ExceptionCode
|
|
== STATUS_WX86_BREAKPOINT))
|
|
&& windows_process.windows_initialization_done)
|
|
{
|
|
th->stopped_at_software_breakpoint = true;
|
|
th->pc_adjusted = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
else
|
|
{
|
|
int detach = 0;
|
|
|
|
if (deprecated_ui_loop_hook != NULL)
|
|
detach = deprecated_ui_loop_hook (0);
|
|
|
|
if (detach)
|
|
kill ();
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
windows_nat_target::do_initial_windows_stuff (DWORD pid, bool attaching)
|
|
{
|
|
int i;
|
|
struct inferior *inf;
|
|
|
|
windows_process.last_sig = GDB_SIGNAL_0;
|
|
windows_process.open_process_used = 0;
|
|
for (i = 0;
|
|
i < sizeof (windows_process.dr) / sizeof (windows_process.dr[0]);
|
|
i++)
|
|
windows_process.dr[i] = 0;
|
|
#ifdef __CYGWIN__
|
|
cygwin_load_start = cygwin_load_end = 0;
|
|
#endif
|
|
windows_process.current_event.dwProcessId = pid;
|
|
memset (&windows_process.current_event, 0,
|
|
sizeof (windows_process.current_event));
|
|
inf = current_inferior ();
|
|
if (!inf->target_is_pushed (this))
|
|
inf->push_target (this);
|
|
disable_breakpoints_in_shlibs ();
|
|
windows_clear_solib ();
|
|
clear_proceed_status (0);
|
|
init_wait_for_inferior ();
|
|
|
|
#ifdef __x86_64__
|
|
windows_process.ignore_first_breakpoint
|
|
= !attaching && windows_process.wow64_process;
|
|
|
|
if (!windows_process.wow64_process)
|
|
{
|
|
windows_process.mappings = amd64_mappings;
|
|
windows_process.segment_register_p = amd64_windows_segment_register_p;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
windows_process.mappings = i386_mappings;
|
|
windows_process.segment_register_p = i386_windows_segment_register_p;
|
|
}
|
|
|
|
inferior_appeared (inf, pid);
|
|
inf->attach_flag = attaching;
|
|
|
|
target_terminal::init ();
|
|
target_terminal::inferior ();
|
|
|
|
windows_process.windows_initialization_done = 0;
|
|
|
|
ptid_t last_ptid;
|
|
|
|
while (1)
|
|
{
|
|
struct target_waitstatus status;
|
|
|
|
last_ptid = this->wait (minus_one_ptid, &status, 0);
|
|
|
|
/* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread
|
|
events. */
|
|
if (status.kind () != TARGET_WAITKIND_LOADED
|
|
&& status.kind () != TARGET_WAITKIND_SPURIOUS)
|
|
break;
|
|
|
|
this->resume (minus_one_ptid, 0, GDB_SIGNAL_0);
|
|
}
|
|
|
|
switch_to_thread (find_thread_ptid (this, last_ptid));
|
|
|
|
/* Now that the inferior has been started and all DLLs have been mapped,
|
|
we can iterate over all DLLs and load them in.
|
|
|
|
We avoid doing it any earlier because, on certain versions of Windows,
|
|
LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular,
|
|
we have seen on Windows 8.1 that the ntdll.dll load event does not
|
|
include the DLL name, preventing us from creating an associated SO.
|
|
A possible explanation is that ntdll.dll might be mapped before
|
|
the SO info gets created by the Windows system -- ntdll.dll is
|
|
the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs
|
|
do not seem to suffer from that problem.
|
|
|
|
Rather than try to work around this sort of issue, it is much
|
|
simpler to just ignore DLL load/unload events during the startup
|
|
phase, and then process them all in one batch now. */
|
|
windows_process.add_all_dlls ();
|
|
|
|
windows_process.windows_initialization_done = 1;
|
|
return;
|
|
}
|
|
|
|
/* Try to set or remove a user privilege to the current process. Return -1
|
|
if that fails, the previous setting of that privilege otherwise.
|
|
|
|
This code is copied from the Cygwin source code and rearranged to allow
|
|
dynamically loading of the needed symbols from advapi32 which is only
|
|
available on NT/2K/XP. */
|
|
static int
|
|
set_process_privilege (const char *privilege, BOOL enable)
|
|
{
|
|
HANDLE token_hdl = NULL;
|
|
LUID restore_priv;
|
|
TOKEN_PRIVILEGES new_priv, orig_priv;
|
|
int ret = -1;
|
|
DWORD size;
|
|
|
|
if (!OpenProcessToken (GetCurrentProcess (),
|
|
TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
|
|
&token_hdl))
|
|
goto out;
|
|
|
|
if (!LookupPrivilegeValueA (NULL, privilege, &restore_priv))
|
|
goto out;
|
|
|
|
new_priv.PrivilegeCount = 1;
|
|
new_priv.Privileges[0].Luid = restore_priv;
|
|
new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
|
|
|
|
if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
|
|
sizeof orig_priv, &orig_priv, &size))
|
|
goto out;
|
|
#if 0
|
|
/* Disabled, otherwise every `attach' in an unprivileged user session
|
|
would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
|
|
windows_attach(). */
|
|
/* AdjustTokenPrivileges returns TRUE even if the privilege could not
|
|
be enabled. GetLastError () returns an correct error code, though. */
|
|
if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
|
|
goto out;
|
|
#endif
|
|
|
|
ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
|
|
|
|
out:
|
|
if (token_hdl)
|
|
CloseHandle (token_hdl);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Attach to process PID, then initialize for debugging it. */
|
|
|
|
void
|
|
windows_nat_target::attach (const char *args, int from_tty)
|
|
{
|
|
BOOL ok;
|
|
DWORD pid;
|
|
|
|
pid = parse_pid_to_attach (args);
|
|
|
|
if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
|
|
warning ("Failed to get SE_DEBUG_NAME privilege\n"
|
|
"This can cause attach to fail on Windows NT/2K/XP");
|
|
|
|
windows_init_thread_list ();
|
|
ok = DebugActiveProcess (pid);
|
|
windows_process.saw_create = 0;
|
|
|
|
#ifdef __CYGWIN__
|
|
if (!ok)
|
|
{
|
|
/* Try fall back to Cygwin pid. */
|
|
pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid);
|
|
|
|
if (pid > 0)
|
|
ok = DebugActiveProcess (pid);
|
|
}
|
|
#endif
|
|
|
|
if (!ok)
|
|
error (_("Can't attach to process %u (error %u)"),
|
|
(unsigned) pid, (unsigned) GetLastError ());
|
|
|
|
DebugSetProcessKillOnExit (FALSE);
|
|
|
|
target_announce_attach (from_tty, pid);
|
|
|
|
#ifdef __x86_64__
|
|
HANDLE h = OpenProcess (PROCESS_QUERY_INFORMATION, FALSE, pid);
|
|
if (h != NULL)
|
|
{
|
|
BOOL wow64;
|
|
if (IsWow64Process (h, &wow64))
|
|
windows_process.wow64_process = wow64;
|
|
CloseHandle (h);
|
|
}
|
|
#endif
|
|
|
|
do_initial_windows_stuff (pid, 1);
|
|
target_terminal::ours ();
|
|
}
|
|
|
|
void
|
|
windows_nat_target::detach (inferior *inf, int from_tty)
|
|
{
|
|
int detached = 1;
|
|
|
|
ptid_t ptid = minus_one_ptid;
|
|
resume (ptid, 0, GDB_SIGNAL_0);
|
|
|
|
if (!DebugActiveProcessStop (windows_process.current_event.dwProcessId))
|
|
{
|
|
error (_("Can't detach process %u (error %u)"),
|
|
(unsigned) windows_process.current_event.dwProcessId,
|
|
(unsigned) GetLastError ());
|
|
detached = 0;
|
|
}
|
|
DebugSetProcessKillOnExit (FALSE);
|
|
|
|
if (detached)
|
|
target_announce_detach (from_tty);
|
|
|
|
x86_cleanup_dregs ();
|
|
switch_to_no_thread ();
|
|
detach_inferior (inf);
|
|
|
|
maybe_unpush_target ();
|
|
}
|
|
|
|
/* The pid_to_exec_file target_ops method for this platform. */
|
|
|
|
const char *
|
|
windows_nat_target::pid_to_exec_file (int pid)
|
|
{
|
|
return windows_process.pid_to_exec_file (pid);
|
|
}
|
|
|
|
/* Print status information about what we're accessing. */
|
|
|
|
void
|
|
windows_nat_target::files_info ()
|
|
{
|
|
struct inferior *inf = current_inferior ();
|
|
|
|
gdb_printf ("\tUsing the running image of %s %s.\n",
|
|
inf->attach_flag ? "attached" : "child",
|
|
target_pid_to_str (inferior_ptid).c_str ());
|
|
}
|
|
|
|
/* Modify CreateProcess parameters for use of a new separate console.
|
|
Parameters are:
|
|
*FLAGS: DWORD parameter for general process creation flags.
|
|
*SI: STARTUPINFO structure, for which the console window size and
|
|
console buffer size is filled in if GDB is running in a console.
|
|
to create the new console.
|
|
The size of the used font is not available on all versions of
|
|
Windows OS. Furthermore, the current font might not be the default
|
|
font, but this is still better than before.
|
|
If the windows and buffer sizes are computed,
|
|
SI->DWFLAGS is changed so that this information is used
|
|
by CreateProcess function. */
|
|
|
|
static void
|
|
windows_set_console_info (STARTUPINFO *si, DWORD *flags)
|
|
{
|
|
HANDLE hconsole = CreateFile ("CONOUT$", GENERIC_READ | GENERIC_WRITE,
|
|
FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0);
|
|
|
|
if (hconsole != INVALID_HANDLE_VALUE)
|
|
{
|
|
CONSOLE_SCREEN_BUFFER_INFO sbinfo;
|
|
COORD font_size;
|
|
CONSOLE_FONT_INFO cfi;
|
|
|
|
GetCurrentConsoleFont (hconsole, FALSE, &cfi);
|
|
font_size = GetConsoleFontSize (hconsole, cfi.nFont);
|
|
GetConsoleScreenBufferInfo(hconsole, &sbinfo);
|
|
si->dwXSize = sbinfo.srWindow.Right - sbinfo.srWindow.Left + 1;
|
|
si->dwYSize = sbinfo.srWindow.Bottom - sbinfo.srWindow.Top + 1;
|
|
if (font_size.X)
|
|
si->dwXSize *= font_size.X;
|
|
else
|
|
si->dwXSize *= 8;
|
|
if (font_size.Y)
|
|
si->dwYSize *= font_size.Y;
|
|
else
|
|
si->dwYSize *= 12;
|
|
si->dwXCountChars = sbinfo.dwSize.X;
|
|
si->dwYCountChars = sbinfo.dwSize.Y;
|
|
si->dwFlags |= STARTF_USESIZE | STARTF_USECOUNTCHARS;
|
|
}
|
|
*flags |= CREATE_NEW_CONSOLE;
|
|
}
|
|
|
|
#ifndef __CYGWIN__
|
|
/* Function called by qsort to sort environment strings. */
|
|
|
|
static int
|
|
envvar_cmp (const void *a, const void *b)
|
|
{
|
|
const char **p = (const char **) a;
|
|
const char **q = (const char **) b;
|
|
return strcasecmp (*p, *q);
|
|
}
|
|
#endif
|
|
|
|
#ifdef __CYGWIN__
|
|
static void
|
|
clear_win32_environment (char **env)
|
|
{
|
|
int i;
|
|
size_t len;
|
|
wchar_t *copy = NULL, *equalpos;
|
|
|
|
for (i = 0; env[i] && *env[i]; i++)
|
|
{
|
|
len = mbstowcs (NULL, env[i], 0) + 1;
|
|
copy = (wchar_t *) xrealloc (copy, len * sizeof (wchar_t));
|
|
mbstowcs (copy, env[i], len);
|
|
equalpos = wcschr (copy, L'=');
|
|
if (equalpos)
|
|
*equalpos = L'\0';
|
|
SetEnvironmentVariableW (copy, NULL);
|
|
}
|
|
xfree (copy);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __CYGWIN__
|
|
|
|
/* Redirection of inferior I/O streams for native MS-Windows programs.
|
|
Unlike on Unix, where this is handled by invoking the inferior via
|
|
the shell, on MS-Windows we need to emulate the cmd.exe shell.
|
|
|
|
The official documentation of the cmd.exe redirection features is here:
|
|
|
|
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx
|
|
|
|
(That page talks about Windows XP, but there's no newer
|
|
documentation, so we assume later versions of cmd.exe didn't change
|
|
anything.)
|
|
|
|
Caveat: the documentation on that page seems to include a few lies.
|
|
For example, it describes strange constructs 1<&2 and 2<&1, which
|
|
seem to work only when 1>&2 resp. 2>&1 would make sense, and so I
|
|
think the cmd.exe parser of the redirection symbols simply doesn't
|
|
care about the < vs > distinction in these cases. Therefore, the
|
|
supported features are explicitly documented below.
|
|
|
|
The emulation below aims at supporting all the valid use cases
|
|
supported by cmd.exe, which include:
|
|
|
|
< FILE redirect standard input from FILE
|
|
0< FILE redirect standard input from FILE
|
|
<&N redirect standard input from file descriptor N
|
|
0<&N redirect standard input from file descriptor N
|
|
> FILE redirect standard output to FILE
|
|
>> FILE append standard output to FILE
|
|
1>> FILE append standard output to FILE
|
|
>&N redirect standard output to file descriptor N
|
|
1>&N redirect standard output to file descriptor N
|
|
>>&N append standard output to file descriptor N
|
|
1>>&N append standard output to file descriptor N
|
|
2> FILE redirect standard error to FILE
|
|
2>> FILE append standard error to FILE
|
|
2>&N redirect standard error to file descriptor N
|
|
2>>&N append standard error to file descriptor N
|
|
|
|
Note that using N > 2 in the above construct is supported, but
|
|
requires that the corresponding file descriptor be open by some
|
|
means elsewhere or outside GDB. Also note that using ">&0" or
|
|
"<&2" will generally fail, because the file descriptor redirected
|
|
from is normally open in an incompatible mode (e.g., FD 0 is open
|
|
for reading only). IOW, use of such tricks is not recommended;
|
|
you are on your own.
|
|
|
|
We do NOT support redirection of file descriptors above 2, as in
|
|
"3>SOME-FILE", because MinGW compiled programs don't (supporting
|
|
that needs special handling in the startup code that MinGW
|
|
doesn't have). Pipes are also not supported.
|
|
|
|
As for invalid use cases, where the redirection contains some
|
|
error, the emulation below will detect that and produce some
|
|
error and/or failure. But the behavior in those cases is not
|
|
bug-for-bug compatible with what cmd.exe does in those cases.
|
|
That's because what cmd.exe does then is not well defined, and
|
|
seems to be a side effect of the cmd.exe parsing of the command
|
|
line more than anything else. For example, try redirecting to an
|
|
invalid file name, as in "> foo:bar".
|
|
|
|
There are also minor syntactic deviations from what cmd.exe does
|
|
in some corner cases. For example, it doesn't support the likes
|
|
of "> &foo" to mean redirect to file named literally "&foo"; we
|
|
do support that here, because that, too, sounds like some issue
|
|
with the cmd.exe parser. Another nicety is that we support
|
|
redirection targets that use file names with forward slashes,
|
|
something cmd.exe doesn't -- this comes in handy since GDB
|
|
file-name completion can be used when typing the command line for
|
|
the inferior. */
|
|
|
|
/* Support routines for redirecting standard handles of the inferior. */
|
|
|
|
/* Parse a single redirection spec, open/duplicate the specified
|
|
file/fd, and assign the appropriate value to one of the 3 standard
|
|
file descriptors. */
|
|
static int
|
|
redir_open (const char *redir_string, int *inp, int *out, int *err)
|
|
{
|
|
int *fd, ref_fd = -2;
|
|
int mode;
|
|
const char *fname = redir_string + 1;
|
|
int rc = *redir_string;
|
|
|
|
switch (rc)
|
|
{
|
|
case '0':
|
|
fname++;
|
|
/* FALLTHROUGH */
|
|
case '<':
|
|
fd = inp;
|
|
mode = O_RDONLY;
|
|
break;
|
|
case '1': case '2':
|
|
fname++;
|
|
/* FALLTHROUGH */
|
|
case '>':
|
|
fd = (rc == '2') ? err : out;
|
|
mode = O_WRONLY | O_CREAT;
|
|
if (*fname == '>')
|
|
{
|
|
fname++;
|
|
mode |= O_APPEND;
|
|
}
|
|
else
|
|
mode |= O_TRUNC;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
if (*fname == '&' && '0' <= fname[1] && fname[1] <= '9')
|
|
{
|
|
/* A reference to a file descriptor. */
|
|
char *fdtail;
|
|
ref_fd = (int) strtol (fname + 1, &fdtail, 10);
|
|
if (fdtail > fname + 1 && *fdtail == '\0')
|
|
{
|
|
/* Don't allow redirection when open modes are incompatible. */
|
|
if ((ref_fd == 0 && (fd == out || fd == err))
|
|
|| ((ref_fd == 1 || ref_fd == 2) && fd == inp))
|
|
{
|
|
errno = EPERM;
|
|
return -1;
|
|
}
|
|
if (ref_fd == 0)
|
|
ref_fd = *inp;
|
|
else if (ref_fd == 1)
|
|
ref_fd = *out;
|
|
else if (ref_fd == 2)
|
|
ref_fd = *err;
|
|
}
|
|
else
|
|
{
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
}
|
|
else
|
|
fname++; /* skip the separator space */
|
|
/* If the descriptor is already open, close it. This allows
|
|
multiple specs of redirections for the same stream, which is
|
|
somewhat nonsensical, but still valid and supported by cmd.exe.
|
|
(But cmd.exe only opens a single file in this case, the one
|
|
specified by the last redirection spec on the command line.) */
|
|
if (*fd >= 0)
|
|
_close (*fd);
|
|
if (ref_fd == -2)
|
|
{
|
|
*fd = _open (fname, mode, _S_IREAD | _S_IWRITE);
|
|
if (*fd < 0)
|
|
return -1;
|
|
}
|
|
else if (ref_fd == -1)
|
|
*fd = -1; /* reset to default destination */
|
|
else
|
|
{
|
|
*fd = _dup (ref_fd);
|
|
if (*fd < 0)
|
|
return -1;
|
|
}
|
|
/* _open just sets a flag for O_APPEND, which won't be passed to the
|
|
inferior, so we need to actually move the file pointer. */
|
|
if ((mode & O_APPEND) != 0)
|
|
_lseek (*fd, 0L, SEEK_END);
|
|
return 0;
|
|
}
|
|
|
|
/* Canonicalize a single redirection spec and set up the corresponding
|
|
file descriptor as specified. */
|
|
static int
|
|
redir_set_redirection (const char *s, int *inp, int *out, int *err)
|
|
{
|
|
char buf[__PMAX + 2 + 5]; /* extra space for quotes & redirection string */
|
|
char *d = buf;
|
|
const char *start = s;
|
|
int quote = 0;
|
|
|
|
*d++ = *s++; /* copy the 1st character, < or > or a digit */
|
|
if ((*start == '>' || *start == '1' || *start == '2')
|
|
&& *s == '>')
|
|
{
|
|
*d++ = *s++;
|
|
if (*s == '>' && *start != '>')
|
|
*d++ = *s++;
|
|
}
|
|
else if (*start == '0' && *s == '<')
|
|
*d++ = *s++;
|
|
/* cmd.exe recognizes "&N" only immediately after the redirection symbol. */
|
|
if (*s != '&')
|
|
{
|
|
while (isspace (*s)) /* skip whitespace before file name */
|
|
s++;
|
|
*d++ = ' '; /* separate file name with a single space */
|
|
}
|
|
|
|
/* Copy the file name. */
|
|
while (*s)
|
|
{
|
|
/* Remove quoting characters from the file name in buf[]. */
|
|
if (*s == '"') /* could support '..' quoting here */
|
|
{
|
|
if (!quote)
|
|
quote = *s++;
|
|
else if (*s == quote)
|
|
{
|
|
quote = 0;
|
|
s++;
|
|
}
|
|
else
|
|
*d++ = *s++;
|
|
}
|
|
else if (*s == '\\')
|
|
{
|
|
if (s[1] == '"') /* could support '..' here */
|
|
s++;
|
|
*d++ = *s++;
|
|
}
|
|
else if (isspace (*s) && !quote)
|
|
break;
|
|
else
|
|
*d++ = *s++;
|
|
if (d - buf >= sizeof (buf) - 1)
|
|
{
|
|
errno = ENAMETOOLONG;
|
|
return 0;
|
|
}
|
|
}
|
|
*d = '\0';
|
|
|
|
/* Windows doesn't allow redirection characters in file names, so we
|
|
can bail out early if they use them, or if there's no target file
|
|
name after the redirection symbol. */
|
|
if (d[-1] == '>' || d[-1] == '<')
|
|
{
|
|
errno = ENOENT;
|
|
return 0;
|
|
}
|
|
if (redir_open (buf, inp, out, err) == 0)
|
|
return s - start;
|
|
return 0;
|
|
}
|
|
|
|
/* Parse the command line for redirection specs and prepare the file
|
|
descriptors for the 3 standard streams accordingly. */
|
|
static bool
|
|
redirect_inferior_handles (const char *cmd_orig, char *cmd,
|
|
int *inp, int *out, int *err)
|
|
{
|
|
const char *s = cmd_orig;
|
|
char *d = cmd;
|
|
int quote = 0;
|
|
bool retval = false;
|
|
|
|
while (isspace (*s))
|
|
*d++ = *s++;
|
|
|
|
while (*s)
|
|
{
|
|
if (*s == '"') /* could also support '..' quoting here */
|
|
{
|
|
if (!quote)
|
|
quote = *s;
|
|
else if (*s == quote)
|
|
quote = 0;
|
|
}
|
|
else if (*s == '\\')
|
|
{
|
|
if (s[1] == '"') /* escaped quote char */
|
|
s++;
|
|
}
|
|
else if (!quote)
|
|
{
|
|
/* Process a single redirection candidate. */
|
|
if (*s == '<' || *s == '>'
|
|
|| ((*s == '1' || *s == '2') && s[1] == '>')
|
|
|| (*s == '0' && s[1] == '<'))
|
|
{
|
|
int skip = redir_set_redirection (s, inp, out, err);
|
|
|
|
if (skip <= 0)
|
|
return false;
|
|
retval = true;
|
|
s += skip;
|
|
}
|
|
}
|
|
if (*s)
|
|
*d++ = *s++;
|
|
}
|
|
*d = '\0';
|
|
return retval;
|
|
}
|
|
#endif /* !__CYGWIN__ */
|
|
|
|
/* Start an inferior windows child process and sets inferior_ptid to its pid.
|
|
EXEC_FILE is the file to run.
|
|
ALLARGS is a string containing the arguments to the program.
|
|
ENV is the environment vector to pass. Errors reported with error(). */
|
|
|
|
void
|
|
windows_nat_target::create_inferior (const char *exec_file,
|
|
const std::string &origallargs,
|
|
char **in_env, int from_tty)
|
|
{
|
|
STARTUPINFO si;
|
|
#ifdef __CYGWIN__
|
|
wchar_t real_path[__PMAX];
|
|
wchar_t shell[__PMAX]; /* Path to shell */
|
|
wchar_t infcwd[__PMAX];
|
|
const char *sh;
|
|
wchar_t *toexec;
|
|
wchar_t *cygallargs;
|
|
wchar_t *args;
|
|
char **old_env = NULL;
|
|
PWCHAR w32_env;
|
|
size_t len;
|
|
int tty;
|
|
int ostdin, ostdout, ostderr;
|
|
#else /* !__CYGWIN__ */
|
|
char shell[__PMAX]; /* Path to shell */
|
|
const char *toexec;
|
|
char *args, *allargs_copy;
|
|
size_t args_len, allargs_len;
|
|
int fd_inp = -1, fd_out = -1, fd_err = -1;
|
|
HANDLE tty = INVALID_HANDLE_VALUE;
|
|
bool redirected = false;
|
|
char *w32env;
|
|
char *temp;
|
|
size_t envlen;
|
|
int i;
|
|
size_t envsize;
|
|
char **env;
|
|
#endif /* !__CYGWIN__ */
|
|
const char *allargs = origallargs.c_str ();
|
|
PROCESS_INFORMATION pi;
|
|
BOOL ret;
|
|
DWORD flags = 0;
|
|
const std::string &inferior_tty = current_inferior ()->tty ();
|
|
|
|
if (!exec_file)
|
|
error (_("No executable specified, use `target exec'."));
|
|
|
|
const char *inferior_cwd = current_inferior ()->cwd ().c_str ();
|
|
std::string expanded_infcwd;
|
|
if (*inferior_cwd == '\0')
|
|
inferior_cwd = nullptr;
|
|
else
|
|
{
|
|
expanded_infcwd = gdb_tilde_expand (inferior_cwd);
|
|
/* Mirror slashes on inferior's cwd. */
|
|
std::replace (expanded_infcwd.begin (), expanded_infcwd.end (),
|
|
'/', '\\');
|
|
inferior_cwd = expanded_infcwd.c_str ();
|
|
}
|
|
|
|
memset (&si, 0, sizeof (si));
|
|
si.cb = sizeof (si);
|
|
|
|
if (new_group)
|
|
flags |= CREATE_NEW_PROCESS_GROUP;
|
|
|
|
if (new_console)
|
|
windows_set_console_info (&si, &flags);
|
|
|
|
#ifdef __CYGWIN__
|
|
if (!useshell)
|
|
{
|
|
flags |= DEBUG_ONLY_THIS_PROCESS;
|
|
if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, exec_file, real_path,
|
|
__PMAX * sizeof (wchar_t)) < 0)
|
|
error (_("Error starting executable: %d"), errno);
|
|
toexec = real_path;
|
|
len = mbstowcs (NULL, allargs, 0) + 1;
|
|
if (len == (size_t) -1)
|
|
error (_("Error starting executable: %d"), errno);
|
|
cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t));
|
|
mbstowcs (cygallargs, allargs, len);
|
|
}
|
|
else
|
|
{
|
|
sh = get_shell ();
|
|
if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, sh, shell, __PMAX) < 0)
|
|
error (_("Error starting executable via shell: %d"), errno);
|
|
len = sizeof (L" -c 'exec '") + mbstowcs (NULL, exec_file, 0)
|
|
+ mbstowcs (NULL, allargs, 0) + 2;
|
|
cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t));
|
|
swprintf (cygallargs, len, L" -c 'exec %s %s'", exec_file, allargs);
|
|
toexec = shell;
|
|
flags |= DEBUG_PROCESS;
|
|
}
|
|
|
|
if (inferior_cwd != NULL
|
|
&& cygwin_conv_path (CCP_POSIX_TO_WIN_W, inferior_cwd,
|
|
infcwd, strlen (inferior_cwd)) < 0)
|
|
error (_("Error converting inferior cwd: %d"), errno);
|
|
|
|
args = (wchar_t *) alloca ((wcslen (toexec) + wcslen (cygallargs) + 2)
|
|
* sizeof (wchar_t));
|
|
wcscpy (args, toexec);
|
|
wcscat (args, L" ");
|
|
wcscat (args, cygallargs);
|
|
|
|
#ifdef CW_CVT_ENV_TO_WINENV
|
|
/* First try to create a direct Win32 copy of the POSIX environment. */
|
|
w32_env = (PWCHAR) cygwin_internal (CW_CVT_ENV_TO_WINENV, in_env);
|
|
if (w32_env != (PWCHAR) -1)
|
|
flags |= CREATE_UNICODE_ENVIRONMENT;
|
|
else
|
|
/* If that fails, fall back to old method tweaking GDB's environment. */
|
|
#endif /* CW_CVT_ENV_TO_WINENV */
|
|
{
|
|
/* Reset all Win32 environment variables to avoid leftover on next run. */
|
|
clear_win32_environment (environ);
|
|
/* Prepare the environment vars for CreateProcess. */
|
|
old_env = environ;
|
|
environ = in_env;
|
|
cygwin_internal (CW_SYNC_WINENV);
|
|
w32_env = NULL;
|
|
}
|
|
|
|
if (inferior_tty.empty ())
|
|
tty = ostdin = ostdout = ostderr = -1;
|
|
else
|
|
{
|
|
tty = open (inferior_tty.c_str (), O_RDWR | O_NOCTTY);
|
|
if (tty < 0)
|
|
{
|
|
print_sys_errmsg (inferior_tty.c_str (), errno);
|
|
ostdin = ostdout = ostderr = -1;
|
|
}
|
|
else
|
|
{
|
|
ostdin = dup (0);
|
|
ostdout = dup (1);
|
|
ostderr = dup (2);
|
|
dup2 (tty, 0);
|
|
dup2 (tty, 1);
|
|
dup2 (tty, 2);
|
|
}
|
|
}
|
|
|
|
windows_init_thread_list ();
|
|
ret = create_process (nullptr, args, flags, w32_env,
|
|
inferior_cwd != nullptr ? infcwd : nullptr,
|
|
disable_randomization,
|
|
&si, &pi);
|
|
if (w32_env)
|
|
/* Just free the Win32 environment, if it could be created. */
|
|
free (w32_env);
|
|
else
|
|
{
|
|
/* Reset all environment variables to avoid leftover on next run. */
|
|
clear_win32_environment (in_env);
|
|
/* Restore normal GDB environment variables. */
|
|
environ = old_env;
|
|
cygwin_internal (CW_SYNC_WINENV);
|
|
}
|
|
|
|
if (tty >= 0)
|
|
{
|
|
::close (tty);
|
|
dup2 (ostdin, 0);
|
|
dup2 (ostdout, 1);
|
|
dup2 (ostderr, 2);
|
|
::close (ostdin);
|
|
::close (ostdout);
|
|
::close (ostderr);
|
|
}
|
|
#else /* !__CYGWIN__ */
|
|
allargs_len = strlen (allargs);
|
|
allargs_copy = strcpy ((char *) alloca (allargs_len + 1), allargs);
|
|
if (strpbrk (allargs_copy, "<>") != NULL)
|
|
{
|
|
int e = errno;
|
|
errno = 0;
|
|
redirected =
|
|
redirect_inferior_handles (allargs, allargs_copy,
|
|
&fd_inp, &fd_out, &fd_err);
|
|
if (errno)
|
|
warning (_("Error in redirection: %s."), safe_strerror (errno));
|
|
else
|
|
errno = e;
|
|
allargs_len = strlen (allargs_copy);
|
|
}
|
|
/* If not all the standard streams are redirected by the command
|
|
line, use INFERIOR_TTY for those which aren't. */
|
|
if (!inferior_tty.empty ()
|
|
&& !(fd_inp >= 0 && fd_out >= 0 && fd_err >= 0))
|
|
{
|
|
SECURITY_ATTRIBUTES sa;
|
|
sa.nLength = sizeof(sa);
|
|
sa.lpSecurityDescriptor = 0;
|
|
sa.bInheritHandle = TRUE;
|
|
tty = CreateFileA (inferior_tty.c_str (), GENERIC_READ | GENERIC_WRITE,
|
|
0, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
|
|
if (tty == INVALID_HANDLE_VALUE)
|
|
warning (_("Warning: Failed to open TTY %s, error %#x."),
|
|
inferior_tty.c_str (), (unsigned) GetLastError ());
|
|
}
|
|
if (redirected || tty != INVALID_HANDLE_VALUE)
|
|
{
|
|
if (fd_inp >= 0)
|
|
si.hStdInput = (HANDLE) _get_osfhandle (fd_inp);
|
|
else if (tty != INVALID_HANDLE_VALUE)
|
|
si.hStdInput = tty;
|
|
else
|
|
si.hStdInput = GetStdHandle (STD_INPUT_HANDLE);
|
|
if (fd_out >= 0)
|
|
si.hStdOutput = (HANDLE) _get_osfhandle (fd_out);
|
|
else if (tty != INVALID_HANDLE_VALUE)
|
|
si.hStdOutput = tty;
|
|
else
|
|
si.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE);
|
|
if (fd_err >= 0)
|
|
si.hStdError = (HANDLE) _get_osfhandle (fd_err);
|
|
else if (tty != INVALID_HANDLE_VALUE)
|
|
si.hStdError = tty;
|
|
else
|
|
si.hStdError = GetStdHandle (STD_ERROR_HANDLE);
|
|
si.dwFlags |= STARTF_USESTDHANDLES;
|
|
}
|
|
|
|
toexec = exec_file;
|
|
/* Build the command line, a space-separated list of tokens where
|
|
the first token is the name of the module to be executed.
|
|
To avoid ambiguities introduced by spaces in the module name,
|
|
we quote it. */
|
|
args_len = strlen (toexec) + 2 /* quotes */ + allargs_len + 2;
|
|
args = (char *) alloca (args_len);
|
|
xsnprintf (args, args_len, "\"%s\" %s", toexec, allargs_copy);
|
|
|
|
flags |= DEBUG_ONLY_THIS_PROCESS;
|
|
|
|
/* CreateProcess takes the environment list as a null terminated set of
|
|
strings (i.e. two nulls terminate the list). */
|
|
|
|
/* Get total size for env strings. */
|
|
for (envlen = 0, i = 0; in_env[i] && *in_env[i]; i++)
|
|
envlen += strlen (in_env[i]) + 1;
|
|
|
|
envsize = sizeof (in_env[0]) * (i + 1);
|
|
env = (char **) alloca (envsize);
|
|
memcpy (env, in_env, envsize);
|
|
/* Windows programs expect the environment block to be sorted. */
|
|
qsort (env, i, sizeof (char *), envvar_cmp);
|
|
|
|
w32env = (char *) alloca (envlen + 1);
|
|
|
|
/* Copy env strings into new buffer. */
|
|
for (temp = w32env, i = 0; env[i] && *env[i]; i++)
|
|
{
|
|
strcpy (temp, env[i]);
|
|
temp += strlen (temp) + 1;
|
|
}
|
|
|
|
/* Final nil string to terminate new env. */
|
|
*temp = 0;
|
|
|
|
windows_init_thread_list ();
|
|
ret = create_process (nullptr, /* image */
|
|
args, /* command line */
|
|
flags, /* start flags */
|
|
w32env, /* environment */
|
|
inferior_cwd, /* current directory */
|
|
disable_randomization,
|
|
&si,
|
|
&pi);
|
|
if (tty != INVALID_HANDLE_VALUE)
|
|
CloseHandle (tty);
|
|
if (fd_inp >= 0)
|
|
_close (fd_inp);
|
|
if (fd_out >= 0)
|
|
_close (fd_out);
|
|
if (fd_err >= 0)
|
|
_close (fd_err);
|
|
#endif /* !__CYGWIN__ */
|
|
|
|
if (!ret)
|
|
error (_("Error creating process %s, (error %u)."),
|
|
exec_file, (unsigned) GetLastError ());
|
|
|
|
#ifdef __x86_64__
|
|
BOOL wow64;
|
|
if (IsWow64Process (pi.hProcess, &wow64))
|
|
windows_process.wow64_process = wow64;
|
|
#endif
|
|
|
|
CloseHandle (pi.hThread);
|
|
CloseHandle (pi.hProcess);
|
|
|
|
if (useshell && shell[0] != '\0')
|
|
windows_process.saw_create = -1;
|
|
else
|
|
windows_process.saw_create = 0;
|
|
|
|
do_initial_windows_stuff (pi.dwProcessId, 0);
|
|
|
|
/* windows_continue (DBG_CONTINUE, -1, 0); */
|
|
}
|
|
|
|
void
|
|
windows_nat_target::mourn_inferior ()
|
|
{
|
|
(void) windows_continue (DBG_CONTINUE, -1, 0);
|
|
x86_cleanup_dregs();
|
|
if (windows_process.open_process_used)
|
|
{
|
|
CHECK (CloseHandle (windows_process.handle));
|
|
windows_process.open_process_used = 0;
|
|
}
|
|
windows_process.siginfo_er.ExceptionCode = 0;
|
|
inf_child_target::mourn_inferior ();
|
|
}
|
|
|
|
/* Send a SIGINT to the process group. This acts just like the user typed a
|
|
^C on the controlling terminal. */
|
|
|
|
void
|
|
windows_nat_target::interrupt ()
|
|
{
|
|
DEBUG_EVENTS ("GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)");
|
|
CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT,
|
|
windows_process.current_event.dwProcessId));
|
|
registers_changed (); /* refresh register state */
|
|
}
|
|
|
|
/* Helper for windows_xfer_partial that handles memory transfers.
|
|
Arguments are like target_xfer_partial. */
|
|
|
|
static enum target_xfer_status
|
|
windows_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
|
|
{
|
|
SIZE_T done = 0;
|
|
BOOL success;
|
|
DWORD lasterror = 0;
|
|
|
|
if (writebuf != NULL)
|
|
{
|
|
DEBUG_MEM ("write target memory, %s bytes at %s",
|
|
pulongest (len), core_addr_to_string (memaddr));
|
|
success = WriteProcessMemory (windows_process.handle,
|
|
(LPVOID) (uintptr_t) memaddr, writebuf,
|
|
len, &done);
|
|
if (!success)
|
|
lasterror = GetLastError ();
|
|
FlushInstructionCache (windows_process.handle,
|
|
(LPCVOID) (uintptr_t) memaddr, len);
|
|
}
|
|
else
|
|
{
|
|
DEBUG_MEM ("read target memory, %s bytes at %s",
|
|
pulongest (len), core_addr_to_string (memaddr));
|
|
success = ReadProcessMemory (windows_process.handle,
|
|
(LPCVOID) (uintptr_t) memaddr, readbuf,
|
|
len, &done);
|
|
if (!success)
|
|
lasterror = GetLastError ();
|
|
}
|
|
*xfered_len = (ULONGEST) done;
|
|
if (!success && lasterror == ERROR_PARTIAL_COPY && done > 0)
|
|
return TARGET_XFER_OK;
|
|
else
|
|
return success ? TARGET_XFER_OK : TARGET_XFER_E_IO;
|
|
}
|
|
|
|
void
|
|
windows_nat_target::kill ()
|
|
{
|
|
CHECK (TerminateProcess (windows_process.handle, 0));
|
|
|
|
for (;;)
|
|
{
|
|
if (!windows_continue (DBG_CONTINUE, -1, 1))
|
|
break;
|
|
if (!wait_for_debug_event (&windows_process.current_event, INFINITE))
|
|
break;
|
|
if (windows_process.current_event.dwDebugEventCode
|
|
== EXIT_PROCESS_DEBUG_EVENT)
|
|
break;
|
|
}
|
|
|
|
target_mourn_inferior (inferior_ptid); /* Or just windows_mourn_inferior? */
|
|
}
|
|
|
|
void
|
|
windows_nat_target::close ()
|
|
{
|
|
DEBUG_EVENTS ("inferior_ptid=%d\n", inferior_ptid.pid ());
|
|
}
|
|
|
|
/* Convert pid to printable format. */
|
|
std::string
|
|
windows_nat_target::pid_to_str (ptid_t ptid)
|
|
{
|
|
if (ptid.lwp () != 0)
|
|
return string_printf ("Thread %d.0x%lx", ptid.pid (), ptid.lwp ());
|
|
|
|
return normal_pid_to_str (ptid);
|
|
}
|
|
|
|
static enum target_xfer_status
|
|
windows_xfer_shared_libraries (struct target_ops *ops,
|
|
enum target_object object, const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, ULONGEST len,
|
|
ULONGEST *xfered_len)
|
|
{
|
|
auto_obstack obstack;
|
|
const char *buf;
|
|
LONGEST len_avail;
|
|
|
|
if (writebuf)
|
|
return TARGET_XFER_E_IO;
|
|
|
|
obstack_grow_str (&obstack, "<library-list>\n");
|
|
for (windows_solib &so : windows_process.solibs)
|
|
windows_xfer_shared_library (so.name.c_str (),
|
|
(CORE_ADDR) (uintptr_t) so.load_addr,
|
|
&so.text_offset,
|
|
target_gdbarch (), &obstack);
|
|
obstack_grow_str0 (&obstack, "</library-list>\n");
|
|
|
|
buf = (const char *) obstack_finish (&obstack);
|
|
len_avail = strlen (buf);
|
|
if (offset >= len_avail)
|
|
len= 0;
|
|
else
|
|
{
|
|
if (len > len_avail - offset)
|
|
len = len_avail - offset;
|
|
memcpy (readbuf, buf + offset, len);
|
|
}
|
|
|
|
*xfered_len = (ULONGEST) len;
|
|
return len != 0 ? TARGET_XFER_OK : TARGET_XFER_EOF;
|
|
}
|
|
|
|
/* Helper for windows_nat_target::xfer_partial that handles signal info. */
|
|
|
|
static enum target_xfer_status
|
|
windows_xfer_siginfo (gdb_byte *readbuf, ULONGEST offset, ULONGEST len,
|
|
ULONGEST *xfered_len)
|
|
{
|
|
char *buf = (char *) &windows_process.siginfo_er;
|
|
size_t bufsize = sizeof (windows_process.siginfo_er);
|
|
|
|
#ifdef __x86_64__
|
|
EXCEPTION_RECORD32 er32;
|
|
if (windows_process.wow64_process)
|
|
{
|
|
buf = (char *) &er32;
|
|
bufsize = sizeof (er32);
|
|
|
|
er32.ExceptionCode = windows_process.siginfo_er.ExceptionCode;
|
|
er32.ExceptionFlags = windows_process.siginfo_er.ExceptionFlags;
|
|
er32.ExceptionRecord
|
|
= (uintptr_t) windows_process.siginfo_er.ExceptionRecord;
|
|
er32.ExceptionAddress
|
|
= (uintptr_t) windows_process.siginfo_er.ExceptionAddress;
|
|
er32.NumberParameters = windows_process.siginfo_er.NumberParameters;
|
|
int i;
|
|
for (i = 0; i < EXCEPTION_MAXIMUM_PARAMETERS; i++)
|
|
er32.ExceptionInformation[i]
|
|
= windows_process.siginfo_er.ExceptionInformation[i];
|
|
}
|
|
#endif
|
|
|
|
if (windows_process.siginfo_er.ExceptionCode == 0)
|
|
return TARGET_XFER_E_IO;
|
|
|
|
if (readbuf == nullptr)
|
|
return TARGET_XFER_E_IO;
|
|
|
|
if (offset > bufsize)
|
|
return TARGET_XFER_E_IO;
|
|
|
|
if (offset + len > bufsize)
|
|
len = bufsize - offset;
|
|
|
|
memcpy (readbuf, buf + offset, len);
|
|
*xfered_len = len;
|
|
|
|
return TARGET_XFER_OK;
|
|
}
|
|
|
|
enum target_xfer_status
|
|
windows_nat_target::xfer_partial (enum target_object object,
|
|
const char *annex, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf, ULONGEST offset,
|
|
ULONGEST len, ULONGEST *xfered_len)
|
|
{
|
|
switch (object)
|
|
{
|
|
case TARGET_OBJECT_MEMORY:
|
|
return windows_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
|
|
|
|
case TARGET_OBJECT_LIBRARIES:
|
|
return windows_xfer_shared_libraries (this, object, annex, readbuf,
|
|
writebuf, offset, len, xfered_len);
|
|
|
|
case TARGET_OBJECT_SIGNAL_INFO:
|
|
return windows_xfer_siginfo (readbuf, offset, len, xfered_len);
|
|
|
|
default:
|
|
if (beneath () == NULL)
|
|
{
|
|
/* This can happen when requesting the transfer of unsupported
|
|
objects before a program has been started (and therefore
|
|
with the current_target having no target beneath). */
|
|
return TARGET_XFER_E_IO;
|
|
}
|
|
return beneath ()->xfer_partial (object, annex,
|
|
readbuf, writebuf, offset, len,
|
|
xfered_len);
|
|
}
|
|
}
|
|
|
|
/* Provide thread local base, i.e. Thread Information Block address.
|
|
Returns 1 if ptid is found and sets *ADDR to thread_local_base. */
|
|
|
|
bool
|
|
windows_nat_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr)
|
|
{
|
|
windows_thread_info *th;
|
|
|
|
th = windows_process.thread_rec (ptid, DONT_INVALIDATE_CONTEXT);
|
|
if (th == NULL)
|
|
return false;
|
|
|
|
if (addr != NULL)
|
|
*addr = th->thread_local_base;
|
|
|
|
return true;
|
|
}
|
|
|
|
ptid_t
|
|
windows_nat_target::get_ada_task_ptid (long lwp, ULONGEST thread)
|
|
{
|
|
return ptid_t (inferior_ptid.pid (), lwp, 0);
|
|
}
|
|
|
|
/* Implementation of the to_thread_name method. */
|
|
|
|
const char *
|
|
windows_nat_target::thread_name (struct thread_info *thr)
|
|
{
|
|
windows_thread_info *th
|
|
= windows_process.thread_rec (thr->ptid,
|
|
DONT_INVALIDATE_CONTEXT);
|
|
return th->thread_name ();
|
|
}
|
|
|
|
|
|
void _initialize_windows_nat ();
|
|
void
|
|
_initialize_windows_nat ()
|
|
{
|
|
x86_dr_low.set_control = cygwin_set_dr7;
|
|
x86_dr_low.set_addr = cygwin_set_dr;
|
|
x86_dr_low.get_addr = cygwin_get_dr;
|
|
x86_dr_low.get_status = cygwin_get_dr6;
|
|
x86_dr_low.get_control = cygwin_get_dr7;
|
|
|
|
/* x86_dr_low.debug_register_length field is set by
|
|
calling x86_set_debug_register_length function
|
|
in processor windows specific native file. */
|
|
|
|
add_inf_child_target (&the_windows_nat_target);
|
|
|
|
#ifdef __CYGWIN__
|
|
cygwin_internal (CW_SET_DOS_FILE_WARNING, 0);
|
|
#endif
|
|
|
|
add_com ("signal-event", class_run, signal_event_command, _("\
|
|
Signal a crashed process with event ID, to allow its debugging.\n\
|
|
This command is needed in support of setting up GDB as JIT debugger on \
|
|
MS-Windows. The command should be invoked from the GDB command line using \
|
|
the '-ex' command-line option. The ID of the event that blocks the \
|
|
crashed process will be supplied by the Windows JIT debugging mechanism."));
|
|
|
|
#ifdef __CYGWIN__
|
|
add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\
|
|
Set use of shell to start subprocess."), _("\
|
|
Show use of shell to start subprocess."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("cygwin-exceptions", class_support,
|
|
&cygwin_exceptions, _("\
|
|
Break when an exception is detected in the Cygwin DLL itself."), _("\
|
|
Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
#endif
|
|
|
|
add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\
|
|
Set creation of new console when creating child process."), _("\
|
|
Show creation of new console when creating child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\
|
|
Set creation of new group when creating child process."), _("\
|
|
Show creation of new group when creating child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\
|
|
Set whether to display execution in child process."), _("\
|
|
Show whether to display execution in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\
|
|
Set whether to display kernel events in child process."), _("\
|
|
Show whether to display kernel events in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\
|
|
Set whether to display memory accesses in child process."), _("\
|
|
Show whether to display memory accesses in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugexceptions", class_support,
|
|
&debug_exceptions, _("\
|
|
Set whether to display kernel exceptions in child process."), _("\
|
|
Show whether to display kernel exceptions in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
init_w32_command_list ();
|
|
|
|
add_cmd ("selector", class_info, display_selectors,
|
|
_("Display selectors infos."),
|
|
&info_w32_cmdlist);
|
|
|
|
if (!initialize_loadable ())
|
|
{
|
|
/* This will probably fail on Windows 9x/Me. Let the user know
|
|
that we're missing some functionality. */
|
|
warning(_("\
|
|
cannot automatically find executable file or library to read symbols.\n\
|
|
Use \"file\" or \"dll\" command to load executable/libraries directly."));
|
|
}
|
|
}
|
|
|
|
/* Hardware watchpoint support, adapted from go32-nat.c code. */
|
|
|
|
/* Pass the address ADDR to the inferior in the I'th debug register.
|
|
Here we just store the address in dr array, the registers will be
|
|
actually set up when windows_continue is called. */
|
|
static void
|
|
cygwin_set_dr (int i, CORE_ADDR addr)
|
|
{
|
|
if (i < 0 || i > 3)
|
|
internal_error (__FILE__, __LINE__,
|
|
_("Invalid register %d in cygwin_set_dr.\n"), i);
|
|
windows_process.dr[i] = addr;
|
|
|
|
for (auto &th : windows_process.thread_list)
|
|
th->debug_registers_changed = true;
|
|
}
|
|
|
|
/* Pass the value VAL to the inferior in the DR7 debug control
|
|
register. Here we just store the address in D_REGS, the watchpoint
|
|
will be actually set up in windows_wait. */
|
|
static void
|
|
cygwin_set_dr7 (unsigned long val)
|
|
{
|
|
windows_process.dr[7] = (CORE_ADDR) val;
|
|
|
|
for (auto &th : windows_process.thread_list)
|
|
th->debug_registers_changed = true;
|
|
}
|
|
|
|
/* Get the value of debug register I from the inferior. */
|
|
|
|
static CORE_ADDR
|
|
cygwin_get_dr (int i)
|
|
{
|
|
return windows_process.dr[i];
|
|
}
|
|
|
|
/* Get the value of the DR6 debug status register from the inferior.
|
|
Here we just return the value stored in dr[6]
|
|
by the last call to thread_rec for current_event.dwThreadId id. */
|
|
static unsigned long
|
|
cygwin_get_dr6 (void)
|
|
{
|
|
return (unsigned long) windows_process.dr[6];
|
|
}
|
|
|
|
/* Get the value of the DR7 debug status register from the inferior.
|
|
Here we just return the value stored in dr[7] by the last call to
|
|
thread_rec for current_event.dwThreadId id. */
|
|
|
|
static unsigned long
|
|
cygwin_get_dr7 (void)
|
|
{
|
|
return (unsigned long) windows_process.dr[7];
|
|
}
|
|
|
|
/* Determine if the thread referenced by "ptid" is alive
|
|
by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
|
|
it means that the thread has died. Otherwise it is assumed to be alive. */
|
|
|
|
bool
|
|
windows_nat_target::thread_alive (ptid_t ptid)
|
|
{
|
|
gdb_assert (ptid.lwp () != 0);
|
|
|
|
windows_thread_info *th
|
|
= windows_process.thread_rec (ptid, DONT_INVALIDATE_CONTEXT);
|
|
return WaitForSingleObject (th->h, 0) != WAIT_OBJECT_0;
|
|
}
|
|
|
|
void _initialize_check_for_gdb_ini ();
|
|
void
|
|
_initialize_check_for_gdb_ini ()
|
|
{
|
|
char *homedir;
|
|
if (inhibit_gdbinit)
|
|
return;
|
|
|
|
homedir = getenv ("HOME");
|
|
if (homedir)
|
|
{
|
|
char *p;
|
|
char *oldini = (char *) alloca (strlen (homedir) +
|
|
sizeof ("gdb.ini") + 1);
|
|
strcpy (oldini, homedir);
|
|
p = strchr (oldini, '\0');
|
|
if (p > oldini && !IS_DIR_SEPARATOR (p[-1]))
|
|
*p++ = '/';
|
|
strcpy (p, "gdb.ini");
|
|
if (access (oldini, 0) == 0)
|
|
{
|
|
int len = strlen (oldini);
|
|
char *newini = (char *) alloca (len + 2);
|
|
|
|
xsnprintf (newini, len + 2, "%.*s.gdbinit",
|
|
(int) (len - (sizeof ("gdb.ini") - 1)), oldini);
|
|
warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini);
|
|
}
|
|
}
|
|
}
|