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- /* Tracepoint code for remote server for GDB.
- Copyright (C) 1993-2022 Free Software Foundation, Inc.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #ifndef GDBSERVER_TRACEPOINT_H
- #define GDBSERVER_TRACEPOINT_H
- /* Size for a small buffer to report problems from the in-process
- agent back to GDBserver. */
- #define IPA_BUFSIZ 100
- void initialize_tracepoint (void);
- #if defined(__GNUC__)
- # define ATTR_USED __attribute__((used))
- # define ATTR_NOINLINE __attribute__((noinline))
- #else
- # define ATTR_USED
- # define ATTR_NOINLINE
- #endif
- /* How to make symbol public/exported. */
- #if defined _WIN32 || defined __CYGWIN__
- # define EXPORTED_SYMBOL __declspec (dllexport)
- #else
- # if __GNUC__ >= 4
- # define EXPORTED_SYMBOL __attribute__ ((visibility ("default")))
- # else
- # define EXPORTED_SYMBOL
- # endif
- #endif
- /* Use these to make sure the functions and variables the IPA needs to
- export (symbols GDBserver needs to query GDB about) are visible and
- have C linkage.
- Tag exported functions with IP_AGENT_EXPORT_FUNC, tag the
- definitions of exported variables with IP_AGENT_EXPORT_VAR, and
- variable declarations with IP_AGENT_EXPORT_VAR_DECL. Variables
- must also be exported with C linkage. As we can't both use extern
- "C" and initialize a variable in the same statement, variables that
- don't have a separate declaration must use
- EXTERN_C_PUSH/EXTERN_C_POP around their definition. */
- #ifdef IN_PROCESS_AGENT
- # define IP_AGENT_EXPORT_FUNC EXTERN_C EXPORTED_SYMBOL ATTR_NOINLINE ATTR_USED
- # define IP_AGENT_EXPORT_VAR EXPORTED_SYMBOL ATTR_USED
- # define IP_AGENT_EXPORT_VAR_DECL EXTERN_C EXPORTED_SYMBOL
- #else
- # define IP_AGENT_EXPORT_FUNC static
- # define IP_AGENT_EXPORT_VAR
- # define IP_AGENT_EXPORT_VAR_DECL extern
- #endif
- IP_AGENT_EXPORT_VAR_DECL int tracing;
- extern int disconnected_tracing;
- void tracepoint_look_up_symbols (void);
- void stop_tracing (void);
- int handle_tracepoint_general_set (char *own_buf);
- int handle_tracepoint_query (char *own_buf);
- int tracepoint_finished_step (struct thread_info *tinfo, CORE_ADDR stop_pc);
- int tracepoint_was_hit (struct thread_info *tinfo, CORE_ADDR stop_pc);
- void release_while_stepping_state_list (struct thread_info *tinfo);
- int in_readonly_region (CORE_ADDR addr, ULONGEST length);
- int traceframe_read_mem (int tfnum, CORE_ADDR addr,
- unsigned char *buf, ULONGEST length,
- ULONGEST *nbytes);
- int fetch_traceframe_registers (int tfnum,
- struct regcache *regcache,
- int regnum);
- int traceframe_read_sdata (int tfnum, ULONGEST offset,
- unsigned char *buf, ULONGEST length,
- ULONGEST *nbytes);
- int traceframe_read_info (int tfnum, struct buffer *buffer);
- /* If a thread is determined to be collecting a fast tracepoint, this
- structure holds the collect status. */
- struct fast_tpoint_collect_status
- {
- /* The tracepoint that is presently being collected. */
- int tpoint_num;
- CORE_ADDR tpoint_addr;
- /* The address range in the jump pad of where the original
- instruction the tracepoint jump was inserted was relocated
- to. */
- CORE_ADDR adjusted_insn_addr;
- CORE_ADDR adjusted_insn_addr_end;
- };
- /* The possible states a thread can be in, related to the collection of fast
- tracepoint. */
- enum class fast_tpoint_collect_result
- {
- /* Not collecting a fast tracepoint. */
- not_collecting,
- /* In the jump pad, but before the relocated instruction. */
- before_insn,
- /* In the jump pad, but at (or after) the relocated instruction. */
- at_insn,
- };
- fast_tpoint_collect_result fast_tracepoint_collecting
- (CORE_ADDR thread_area, CORE_ADDR stop_pc,
- struct fast_tpoint_collect_status *status);
- void force_unlock_trace_buffer (void);
- int handle_tracepoint_bkpts (struct thread_info *tinfo, CORE_ADDR stop_pc);
- #ifdef IN_PROCESS_AGENT
- void initialize_low_tracepoint (void);
- const struct target_desc *get_ipa_tdesc (int idx);
- void supply_fast_tracepoint_registers (struct regcache *regcache,
- const unsigned char *regs);
- void supply_static_tracepoint_registers (struct regcache *regcache,
- const unsigned char *regs,
- CORE_ADDR pc);
- void set_trampoline_buffer_space (CORE_ADDR begin, CORE_ADDR end,
- char *errmsg);
- void *alloc_jump_pad_buffer (size_t size);
- #ifndef HAVE_GETAUXVAL
- unsigned long getauxval (unsigned long type);
- #endif
- #else
- void stop_tracing (void);
- int claim_trampoline_space (ULONGEST used, CORE_ADDR *trampoline);
- int have_fast_tracepoint_trampoline_buffer (char *msgbuf);
- void gdb_agent_about_to_close (int pid);
- #endif
- struct traceframe;
- struct eval_agent_expr_context;
- /* Do memory copies for bytecodes. */
- /* Do the recording of memory blocks for actions and bytecodes. */
- int agent_mem_read (struct eval_agent_expr_context *ctx,
- unsigned char *to, CORE_ADDR from,
- ULONGEST len);
- LONGEST agent_get_trace_state_variable_value (int num);
- void agent_set_trace_state_variable_value (int num, LONGEST val);
- /* Record the value of a trace state variable. */
- int agent_tsv_read (struct eval_agent_expr_context *ctx, int n);
- int agent_mem_read_string (struct eval_agent_expr_context *ctx,
- unsigned char *to,
- CORE_ADDR from,
- ULONGEST len);
- /* The prototype the get_raw_reg function in the IPA. Each arch's
- bytecode compiler emits calls to this function. */
- ULONGEST get_raw_reg (const unsigned char *raw_regs, int regnum);
- /* Returns the address of the get_raw_reg function in the IPA. */
- CORE_ADDR get_raw_reg_func_addr (void);
- /* Returns the address of the get_trace_state_variable_value
- function in the IPA. */
- CORE_ADDR get_get_tsv_func_addr (void);
- /* Returns the address of the set_trace_state_variable_value
- function in the IPA. */
- CORE_ADDR get_set_tsv_func_addr (void);
- #endif /* GDBSERVER_TRACEPOINT_H */
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