195 lines
6.2 KiB
C
195 lines
6.2 KiB
C
/* Tracepoint code for remote server for GDB.
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Copyright (C) 1993-2022 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 GDBSERVER_TRACEPOINT_H
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#define GDBSERVER_TRACEPOINT_H
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/* Size for a small buffer to report problems from the in-process
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agent back to GDBserver. */
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#define IPA_BUFSIZ 100
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void initialize_tracepoint (void);
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#if defined(__GNUC__)
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# define ATTR_USED __attribute__((used))
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# define ATTR_NOINLINE __attribute__((noinline))
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#else
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# define ATTR_USED
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# define ATTR_NOINLINE
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#endif
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/* How to make symbol public/exported. */
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#if defined _WIN32 || defined __CYGWIN__
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# define EXPORTED_SYMBOL __declspec (dllexport)
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#else
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# if __GNUC__ >= 4
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# define EXPORTED_SYMBOL __attribute__ ((visibility ("default")))
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# else
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# define EXPORTED_SYMBOL
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# endif
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#endif
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/* Use these to make sure the functions and variables the IPA needs to
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export (symbols GDBserver needs to query GDB about) are visible and
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have C linkage.
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Tag exported functions with IP_AGENT_EXPORT_FUNC, tag the
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definitions of exported variables with IP_AGENT_EXPORT_VAR, and
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variable declarations with IP_AGENT_EXPORT_VAR_DECL. Variables
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must also be exported with C linkage. As we can't both use extern
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"C" and initialize a variable in the same statement, variables that
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don't have a separate declaration must use
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EXTERN_C_PUSH/EXTERN_C_POP around their definition. */
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#ifdef IN_PROCESS_AGENT
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# define IP_AGENT_EXPORT_FUNC EXTERN_C EXPORTED_SYMBOL ATTR_NOINLINE ATTR_USED
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# define IP_AGENT_EXPORT_VAR EXPORTED_SYMBOL ATTR_USED
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# define IP_AGENT_EXPORT_VAR_DECL EXTERN_C EXPORTED_SYMBOL
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#else
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# define IP_AGENT_EXPORT_FUNC static
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# define IP_AGENT_EXPORT_VAR
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# define IP_AGENT_EXPORT_VAR_DECL extern
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#endif
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IP_AGENT_EXPORT_VAR_DECL int tracing;
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extern int disconnected_tracing;
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void tracepoint_look_up_symbols (void);
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void stop_tracing (void);
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int handle_tracepoint_general_set (char *own_buf);
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int handle_tracepoint_query (char *own_buf);
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int tracepoint_finished_step (struct thread_info *tinfo, CORE_ADDR stop_pc);
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int tracepoint_was_hit (struct thread_info *tinfo, CORE_ADDR stop_pc);
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void release_while_stepping_state_list (struct thread_info *tinfo);
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int in_readonly_region (CORE_ADDR addr, ULONGEST length);
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int traceframe_read_mem (int tfnum, CORE_ADDR addr,
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unsigned char *buf, ULONGEST length,
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ULONGEST *nbytes);
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int fetch_traceframe_registers (int tfnum,
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struct regcache *regcache,
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int regnum);
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int traceframe_read_sdata (int tfnum, ULONGEST offset,
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unsigned char *buf, ULONGEST length,
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ULONGEST *nbytes);
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int traceframe_read_info (int tfnum, struct buffer *buffer);
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/* If a thread is determined to be collecting a fast tracepoint, this
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structure holds the collect status. */
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struct fast_tpoint_collect_status
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{
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/* The tracepoint that is presently being collected. */
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int tpoint_num;
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CORE_ADDR tpoint_addr;
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/* The address range in the jump pad of where the original
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instruction the tracepoint jump was inserted was relocated
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to. */
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CORE_ADDR adjusted_insn_addr;
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CORE_ADDR adjusted_insn_addr_end;
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};
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/* The possible states a thread can be in, related to the collection of fast
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tracepoint. */
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enum class fast_tpoint_collect_result
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{
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/* Not collecting a fast tracepoint. */
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not_collecting,
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/* In the jump pad, but before the relocated instruction. */
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before_insn,
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/* In the jump pad, but at (or after) the relocated instruction. */
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at_insn,
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};
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fast_tpoint_collect_result fast_tracepoint_collecting
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(CORE_ADDR thread_area, CORE_ADDR stop_pc,
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struct fast_tpoint_collect_status *status);
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void force_unlock_trace_buffer (void);
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int handle_tracepoint_bkpts (struct thread_info *tinfo, CORE_ADDR stop_pc);
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#ifdef IN_PROCESS_AGENT
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void initialize_low_tracepoint (void);
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const struct target_desc *get_ipa_tdesc (int idx);
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void supply_fast_tracepoint_registers (struct regcache *regcache,
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const unsigned char *regs);
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void supply_static_tracepoint_registers (struct regcache *regcache,
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const unsigned char *regs,
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CORE_ADDR pc);
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void set_trampoline_buffer_space (CORE_ADDR begin, CORE_ADDR end,
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char *errmsg);
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void *alloc_jump_pad_buffer (size_t size);
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#ifndef HAVE_GETAUXVAL
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unsigned long getauxval (unsigned long type);
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#endif
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#else
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void stop_tracing (void);
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int claim_trampoline_space (ULONGEST used, CORE_ADDR *trampoline);
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int have_fast_tracepoint_trampoline_buffer (char *msgbuf);
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void gdb_agent_about_to_close (int pid);
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#endif
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struct traceframe;
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struct eval_agent_expr_context;
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/* Do memory copies for bytecodes. */
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/* Do the recording of memory blocks for actions and bytecodes. */
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int agent_mem_read (struct eval_agent_expr_context *ctx,
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unsigned char *to, CORE_ADDR from,
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ULONGEST len);
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LONGEST agent_get_trace_state_variable_value (int num);
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void agent_set_trace_state_variable_value (int num, LONGEST val);
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/* Record the value of a trace state variable. */
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int agent_tsv_read (struct eval_agent_expr_context *ctx, int n);
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int agent_mem_read_string (struct eval_agent_expr_context *ctx,
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unsigned char *to,
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CORE_ADDR from,
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ULONGEST len);
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/* The prototype the get_raw_reg function in the IPA. Each arch's
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bytecode compiler emits calls to this function. */
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ULONGEST get_raw_reg (const unsigned char *raw_regs, int regnum);
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/* Returns the address of the get_raw_reg function in the IPA. */
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CORE_ADDR get_raw_reg_func_addr (void);
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/* Returns the address of the get_trace_state_variable_value
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function in the IPA. */
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CORE_ADDR get_get_tsv_func_addr (void);
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/* Returns the address of the set_trace_state_variable_value
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function in the IPA. */
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CORE_ADDR get_set_tsv_func_addr (void);
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#endif /* GDBSERVER_TRACEPOINT_H */
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