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42a4fec513
I want to add another action (clearing displaced stepping state) that happens when an inferior execs. I think it would be cleaner to have an observer for this event, rather than have infrun know about each other sub-component. Replace the calls to solib_create_inferior_hook and jit_inferior_created_hook in follow_exec by observers. gdb/ChangeLog: * observable.h (inferior_execd): Declare new observable. * observable.c (inferior_execd): Declare new observable. * infrun.c (follow_exec): Notify inferior_execd observer. * jit.c (jit_inferior_created_hook): Make static. (_initialize_jit): Register inferior_execd observer. * jit.h (jit_inferior_created_hook): Remove declaration. * solib.c (_initialize_solib): Register inferior_execd observer. Change-Id: I000cce00094e23baa67df693d912646b6ae38e44
117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
/* JIT declarations for GDB, the GNU Debugger.
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Copyright (C) 2009-2020 Free Software Foundation, Inc.
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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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#ifndef JIT_H
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#define JIT_H
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struct inferior;
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struct objfile;
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struct minimal_symbol;
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/* When the JIT breakpoint fires, the inferior wants us to take one of
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these actions. These values are used by the inferior, so the
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values of these enums cannot be changed. */
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typedef enum
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{
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JIT_NOACTION = 0,
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JIT_REGISTER,
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JIT_UNREGISTER
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} jit_actions_t;
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/* This struct describes a single symbol file in a linked list of
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symbol files describing generated code. As the inferior generates
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code, it adds these entries to the list, and when we attach to the
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inferior, we read them all. For the first element prev_entry
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should be NULL, and for the last element next_entry should be
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NULL. */
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struct jit_code_entry
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{
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CORE_ADDR next_entry;
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CORE_ADDR prev_entry;
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CORE_ADDR symfile_addr;
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ULONGEST symfile_size;
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};
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/* This is the global descriptor that the inferior uses to communicate
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information to the debugger. To alert the debugger to take an
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action, the inferior sets the action_flag to the appropriate enum
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value, updates relevant_entry to point to the relevant code entry,
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and calls the function at the well-known symbol with our
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breakpoint. We then read this descriptor from another global
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well-known symbol. */
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struct jit_descriptor
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{
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uint32_t version;
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/* This should be jit_actions_t, but we want to be specific about the
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bit-width. */
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uint32_t action_flag;
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CORE_ADDR relevant_entry;
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CORE_ADDR first_entry;
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};
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/* An objfile that defines the required symbols of the JIT interface has an
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instance of this type attached to it. */
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struct jiter_objfile_data
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{
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~jiter_objfile_data ();
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/* Symbol for __jit_debug_register_code. */
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minimal_symbol *register_code = nullptr;
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/* Symbol for __jit_debug_descriptor. */
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minimal_symbol *descriptor = nullptr;
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/* This is the relocated address of the __jit_debug_register_code function
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provided by this objfile. This is used to detect relocations changes
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requiring the breakpoint to be re-created. */
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CORE_ADDR cached_code_address = 0;
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/* This is the JIT event breakpoint, or nullptr if it has been deleted. */
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breakpoint *jit_breakpoint = nullptr;
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};
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/* An objfile that is the product of JIT compilation and was registered
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using the JIT interface has an instance of this type attached to it. */
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struct jited_objfile_data
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{
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jited_objfile_data (CORE_ADDR addr)
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: addr (addr)
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{}
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/* Address of struct jit_code_entry for this objfile. */
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CORE_ADDR addr;
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};
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/* Re-establish the jit breakpoint(s). */
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extern void jit_breakpoint_re_set (void);
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/* This function is called by handle_inferior_event when it decides
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that the JIT event breakpoint has fired. JITER is the objfile
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whose JIT event breakpoint has been hit. */
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extern void jit_event_handler (gdbarch *gdbarch, objfile *jiter);
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#endif /* JIT_H */
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