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2010-06-01 Pedro Alves <pedro@codesourcery.com> Stan Shebs <stan@codesourcery.com> * Makefile.in (IPA_DEPFILES, extra_libraries): New. (all): Depend on $(extra_libraries). (install-only): Install the IPA. (IPA_OBJS, IPA_LIB): New. (clean): Remove the IPA lib. (IPAGENT_CFLAGS): New. (tracepoint-ipa.o, utils-ipa.o, remote-utils-ipa.o) (regcache-ipa.o, i386-linux-ipa.o, linux-i386-ipa.o) (linux-amd64-ipa.o, amd64-linux-ipa.o): New rules. * linux-amd64-ipa.c, linux-i386-ipa.c: New files. * configure.ac: Check for atomic builtins support in the compiler. (IPA_DEPFILES, extra_libraries): Define. * configure.srv (ipa_obj): Add description. (ipa_i386_linux_regobj, ipa_amd64_linux_regobj): Define. (i[34567]86-*-linux*): Set ipa_obj. (x86_64-*-linux*): Set ipa_obj. * linux-low.c (stabilizing_threads): New. (supports_fast_tracepoints): New. (linux_detach): Stabilize threads before detaching. (handle_tracepoints): Handle internal tracing breakpoints. Assert the lwp is either not stabilizing, or is moving out of a jump pad. (linux_fast_tracepoint_collecting): New. (maybe_move_out_of_jump_pad): New. (enqueue_one_deferred_signal): New. (dequeue_one_deferred_signal): New. (linux_wait_for_event_1): If moving out of a jump pad, defer pending signals to later. (linux_stabilize_threads): New. (linux_wait_1): Check if threads need moving out of jump pads, and do it if so. (stuck_in_jump_pad_callback): New. (move_out_of_jump_pad_callback): New. (lwp_running): New. (linux_resume_one_lwp): Handle moving out of jump pads. (linux_set_resume_request): Dequeue deferred signals. (need_step_over_p): Also step over fast tracepoint jumps. (start_step_over): Also uninsert fast tracepoint jumps. (finish_step_over): Also reinsert fast tracepoint jumps. (linux_install_fast_tracepoint_jump): New. (linux_target_ops): Install linux_stabilize_threads and linux_install_fast_tracepoint_jump_pad. * linux-low.h (linux_target_ops) <get_thread_area, install_fast_tracepoint_jump_pad>: New fields. (struct lwp_info) <collecting_fast_tracepoint, pending_signals_to_report, exit_jump_pad_bkpt>: New fields. (linux_get_thread_area): Declare. * linux-x86-low.c (jump_insn): New. (x86_get_thread_area): New. (append_insns): New. (push_opcode): New. (amd64_install_fast_tracepoint_jump_pad): New. (i386_install_fast_tracepoint_jump_pad): New. (x86_install_fast_tracepoint_jump_pad): New. (the_low_target): Install x86_get_thread_area and x86_install_fast_tracepoint_jump_pad. * mem-break.c (set_raw_breakpoint_at): Use read_inferior_memory. (struct fast_tracepoint_jump): New. (fast_tracepoint_jump_insn): New. (fast_tracepoint_jump_shadow): New. (find_fast_tracepoint_jump_at): New. (fast_tracepoint_jump_here): New. (delete_fast_tracepoint_jump): New. (set_fast_tracepoint_jump): New. (uninsert_fast_tracepoint_jumps_at): New. (reinsert_fast_tracepoint_jumps_at): New. (set_breakpoint_at): Use write_inferior_memory. (uninsert_raw_breakpoint): Use write_inferior_memory. (check_mem_read): Mask out fast tracepoint jumps. (check_mem_write): Mask out fast tracepoint jumps. * mem-break.h (struct fast_tracepoint_jump): Forward declare. (set_fast_tracepoint_jump): Declare. (delete_fast_tracepoint_jump) (fast_tracepoint_jump_here, uninsert_fast_tracepoint_jumps_at) (reinsert_fast_tracepoint_jumps_at): Declare. * regcache.c: Don't compile many functions when building the in-process agent library. (init_register_cache) [IN_PROCESS_AGENT]: Don't allow allocating the register buffer in the heap. (free_register_cache): If the register buffer isn't owned by the regcache, don't free it. (set_register_cache) [IN_PROCESS_AGENT]: Don't re-alocate pre-existing register caches. * remote-utils.c (convert_int_to_ascii): Constify `from' parameter type. (convert_ascii_to_int): : Constify `from' parameter type. (decode_M_packet, decode_X_packet): Replace the `to' parameter by a `to_p' pointer to pointer parameter. If TO_P is NULL, malloc the needed buffer in-place. (relocate_instruction): New. * server.c (handle_query) <qSymbols>: If the target supports tracepoints, give it a chance of looking up symbols. Report support for fast tracepoints. (handle_status): Stabilize threads. (process_serial_event): Adjust. * server.h (struct fast_tracepoint_jump): Forward declare. (struct process_info) <fast_tracepoint_jumps>: New field. (convert_ascii_to_int, convert_int_to_ascii): Adjust. (decode_X_packet, decode_M_packet): Adjust. (relocate_instruction): Declare. (in_process_agent_loaded): Declare. (tracepoint_look_up_symbols): Declare. (struct fast_tpoint_collect_status): Declare. (fast_tracepoint_collecting): Declare. (force_unlock_trace_buffer): Declare. (handle_tracepoint_bkpts): Declare. (initialize_low_tracepoint) (supply_fast_tracepoint_registers) [IN_PROCESS_AGENT]: Declare. * target.h (struct target_ops) <stabilize_threads, install_fast_tracepoint_jump_pad>: New fields. (stabilize_threads, install_fast_tracepoint_jump_pad): New. * tracepoint.c [HAVE_MALLOC_H]: Include malloc.h. [HAVE_STDINT_H]: Include stdint.h. (trace_debug_1): Rename to ... (trace_vdebug): ... this. (trace_debug): Rename to ... (trace_debug_1): ... this. Add `level' parameter. (trace_debug): New. (ATTR_USED, ATTR_NOINLINE): New. (IP_AGENT_EXPORT): New. (gdb_tp_heap_buffer, gdb_jump_pad_buffer, gdb_jump_pad_buffer_end) (collecting, gdb_collect, stop_tracing, flush_trace_buffer) (about_to_request_buffer_space, trace_buffer_is_full) (stopping_tracepoint, expr_eval_result, error_tracepoint) (tracepoints, tracing, trace_buffer_ctrl, trace_buffer_ctrl_curr) (trace_buffer_lo, trace_buffer_hi, traceframe_read_count) (traceframe_write_count, traceframes_created) (trace_state_variables) New renaming defines. (struct ipa_sym_addresses): New. (STRINGIZE_1, STRINGIZE, IPA_SYM): New. (symbol_list): New. (ipa_sym_addrs): New. (all_tracepoint_symbols_looked_up): New. (in_process_agent_loaded): New. (write_e_ipa_not_loaded): New. (maybe_write_ipa_not_loaded): New. (tracepoint_look_up_symbols): New. (debug_threads) [IN_PROCESS_AGENT]: New. (read_inferior_memory) [IN_PROCESS_AGENT]: New. (UNKNOWN_SIDE_EFFECTS): New. (stop_tracing): New. (flush_trace_buffer): New. (stop_tracing_bkpt): New. (flush_trace_buffer_bkpt): New. (read_inferior_integer): New. (read_inferior_uinteger): New. (read_inferior_data_pointer): New. (write_inferior_data_pointer): New. (write_inferior_integer): New. (write_inferior_uinteger): New. (struct collect_static_trace_data_action): Delete. (enum tracepoint_type): New. (struct tracepoint) <type>: New field `type'. <actions_str, step_actions, step_actions_str>: Only include in GDBserver. <orig_size, obj_addr_on_target, adjusted_insn_addr> <adjusted_insn_addr_end, jump_pad, jump_pad_end>: New fields. (tracepoints): Use IP_AGENT_EXPORT. (last_tracepoint): Don't include in the IPA. (stopping_tracepoint): Use IP_AGENT_EXPORT. (trace_buffer_is_full): Use IP_AGENT_EXPORT. (alloced_trace_state_variables): New. (trace_state_variables): Use IP_AGENT_EXPORT. (traceframe_t): Delete unused variable. (circular_trace_buffer): Don't include in the IPA. (trace_buffer_start): Delete. (struct trace_buffer_control): New. (trace_buffer_free): Delete. (struct ipa_trace_buffer_control): New. (GDBSERVER_FLUSH_COUNT_MASK, GDBSERVER_FLUSH_COUNT_MASK_PREV) (GDBSERVER_FLUSH_COUNT_MASK_CURR, GDBSERVER_UPDATED_FLUSH_COUNT_BIT): New. (trace_buffer_ctrl): New. (TRACE_BUFFER_CTRL_CURR): New. (trace_buffer_start, trace_buffer_free, trace_buffer_end_free): Reimplement as macros. (trace_buffer_wrap): Delete. (traceframe_write_count, traceframe_read_count) (traceframes_created, tracing): Use IP_AGENT_EXPORT. (struct tracepoint_hit_ctx) <type>: New field. (struct fast_tracepoint_ctx): New. (memory_barrier): New. (cmpxchg): New. (record_tracepoint_error): Update atomically in the IPA. (clear_inferior_trace_buffer): New. (about_to_request_buffer_space): New. (trace_buffer_alloc): Handle GDBserver and inferior simulatenous updating the same buffer. (add_tracepoint): Default the tracepoint's type to trap tracepoint, and orig_size to -1. (get_trace_state_variable) [IN_PROCESS_AGENT]: Handle allocated internal variables. (create_trace_state_variable): New parameter `gdb'. Handle it. (clear_installed_tracepoints): Clear fast tracepoint jumps. (cmd_qtdp): Handle fast tracepoints. (cmd_qtdv): Adjust. (max_jump_pad_size): New. (gdb_jump_pad_head): New. (get_jump_space_head): New. (claim_jump_space): New. (sort_tracepoints): New. (MAX_JUMP_SIZE): New. (cmd_qtstart): Handle fast tracepoints. Sync tracepoints with the IPA. (stop_tracing) [IN_PROCESS_AGENT]: Don't include the tdisconnected support. Upload fast traceframes, and delete internal IPA breakpoints. (stop_tracing_handler): New. (flush_trace_buffer_handler): New. (cmd_qtstop): Upload fast tracepoints. (response_tracepoint): Handle fast tracepoints. (tracepoint_finished_step): Upload fast traceframes. Set the tracepoint hit context's tracepoint type. (handle_tracepoint_bkpts): New. (tracepoint_was_hit): Set the tracepoint hit context's tracepoint type. Add comment about fast tracepoints. (collect_data_at_tracepoint) [IN_PROCESS_AGENT]: Don't access the non-existing action_str field. (get_context_regcache): Handle fast tracepoints. (do_action_at_tracepoint) [!IN_PROCESS_AGENT]: Don't write the PC to the regcache. (fast_tracepoint_from_jump_pad_address): New. (fast_tracepoint_from_ipa_tpoint_address): New. (collecting_t): New. (force_unlock_trace_buffer): New. (fast_tracepoint_collecting): New. (collecting): New. (gdb_collect): New. (write_inferior_data_ptr): New. (target_tp_heap): New. (target_malloc): New. (download_agent_expr): New. (UALIGN): New. (download_tracepoints): New. (download_trace_state_variables): New. (upload_fast_traceframes): New. (IPA_FIRST_TRACEFRAME): New. (IPA_NEXT_TRACEFRAME_1): New. (IPA_NEXT_TRACEFRAME): New. [IN_PROCESS_AGENT]: Include sys/mman.h and fcntl.h. [IN_PROCESS_AGENT] (gdb_tp_heap_buffer, gdb_jump_pad_buffer) (gdb_jump_pad_buffer_end): New. [IN_PROCESS_AGENT] (initialize_tracepoint_ftlib): New. (initialize_tracepoint): Adjust. [IN_PROCESS_AGENT]: Allocate the IPA heap, and jump pad scratch buffer. Initialize the low module. * utils.c (PREFIX, TOOLNAME): New. (malloc_failure): Use PREFIX. (error): In the IPA, an error causes an exit. (fatal, warning): Use PREFIX. (internal_error): Use TOOLNAME. (NUMCELLS): Increase to 10. * configure, config.in: Regenerate. gdb/ 2010-06-01 Pedro Alves <pedro@codesourcery.com> * NEWS: Mention gdbserver fast tracepoints support. gdb/doc/ 2010-06-01 Pedro Alves <pedro@codesourcery.com> * gdb.texinfo (Set Tracepoints): Mention tracepoints support in gdbserver, and add cross reference. (Tracepoints support in gdbserver): New subsection.
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/* GNU/Linux/x86 specific low level interface, for the in-process
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agent library for GDB.
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Copyright (C) 2010 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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#include "server.h"
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/* GDB register numbers. */
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enum i386_gdb_regnum
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{
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I386_EAX_REGNUM, /* %eax */
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I386_ECX_REGNUM, /* %ecx */
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I386_EDX_REGNUM, /* %edx */
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I386_EBX_REGNUM, /* %ebx */
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I386_ESP_REGNUM, /* %esp */
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I386_EBP_REGNUM, /* %ebp */
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I386_ESI_REGNUM, /* %esi */
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I386_EDI_REGNUM, /* %edi */
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I386_EIP_REGNUM, /* %eip */
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I386_EFLAGS_REGNUM, /* %eflags */
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I386_CS_REGNUM, /* %cs */
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I386_SS_REGNUM, /* %ss */
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I386_DS_REGNUM, /* %ds */
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I386_ES_REGNUM, /* %es */
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I386_FS_REGNUM, /* %fs */
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I386_GS_REGNUM, /* %gs */
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I386_ST0_REGNUM /* %st(0) */
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};
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#define i386_num_regs 16
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/* Defined in auto-generated file i386-linux.c. */
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void init_registers_i386_linux (void);
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#define FT_CR_EAX 15
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#define FT_CR_ECX 14
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#define FT_CR_EDX 13
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#define FT_CR_EBX 12
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#define FT_CR_UESP 11
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#define FT_CR_EBP 10
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#define FT_CR_ESI 9
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#define FT_CR_EDI 8
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#define FT_CR_EIP 7
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#define FT_CR_EFL 6
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#define FT_CR_DS 5
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#define FT_CR_ES 4
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#define FT_CR_FS 3
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#define FT_CR_GS 2
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#define FT_CR_SS 1
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#define FT_CR_CS 0
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/* Mapping between the general-purpose registers in jump tracepoint
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format and GDB's register array layout. */
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static const int i386_ft_collect_regmap[] =
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{
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FT_CR_EAX * 4, FT_CR_ECX * 4, FT_CR_EDX * 4, FT_CR_EBX * 4,
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FT_CR_UESP * 4, FT_CR_EBP * 4, FT_CR_ESI * 4, FT_CR_EDI * 4,
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FT_CR_EIP * 4, FT_CR_EFL * 4, FT_CR_CS * 4, FT_CR_SS * 4,
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FT_CR_DS * 4, FT_CR_ES * 4, FT_CR_FS * 4, FT_CR_GS * 4
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};
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void
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supply_fast_tracepoint_registers (struct regcache *regcache,
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const unsigned char *buf)
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{
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int i;
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for (i = 0; i < i386_num_regs; i++)
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{
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int regval;
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if (i >= I386_CS_REGNUM && i <= I386_GS_REGNUM)
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regval = *(short *) (((char *) buf) + i386_ft_collect_regmap[i]);
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else
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regval = *(int *) (((char *) buf) + i386_ft_collect_regmap[i]);
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supply_register (regcache, i, ®val);
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}
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}
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/* This is only needed because reg-i386-linux-lib.o references it. We
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may use it proper at some point. */
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const char *gdbserver_xmltarget;
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void
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initialize_low_tracepoint (void)
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{
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init_registers_i386_linux ();
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}
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