gdb/gdbserver/tracepoint.h

   1 /* Tracepoint code for remote server for GDB.
   2    Copyright (C) 1993-2013 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef TRACEPOINT_H
  20 #define TRACEPOINT_H
  21
  22 /* Size for a small buffer to report problems from the in-process
  23    agent back to GDBserver.  */
  24 #define IPA_BUFSIZ 100
  25
  26 void initialize_tracepoint (void);
  27
  28 extern int tracing;
  29 extern int disconnected_tracing;
  30
  31 void tracepoint_look_up_symbols (void);
  32
  33 void stop_tracing (void);
  34
  35 int handle_tracepoint_general_set (char *own_buf);
  36 int handle_tracepoint_query (char *own_buf);
  37
  38 int tracepoint_finished_step (struct thread_info *tinfo, CORE_ADDR stop_pc);
  39 int tracepoint_was_hit (struct thread_info *tinfo, CORE_ADDR stop_pc);
  40
  41 void release_while_stepping_state_list (struct thread_info *tinfo);
  42
  43 extern int current_traceframe;
  44
  45 int in_readonly_region (CORE_ADDR addr, ULONGEST length);
  46 int traceframe_read_mem (int tfnum, CORE_ADDR addr,
  47                          unsigned char *buf, ULONGEST length,
  48                          ULONGEST *nbytes);
  49 int fetch_traceframe_registers (int tfnum,
  50                                 struct regcache *regcache,
  51                                 int regnum);
  52
  53 int traceframe_read_sdata (int tfnum, ULONGEST offset,
  54                            unsigned char *buf, ULONGEST length,
  55                            ULONGEST *nbytes);
  56
  57 int traceframe_read_info (int tfnum, struct buffer *buffer);
  58
  59 /* If a thread is determined to be collecting a fast tracepoint, this
  60    structure holds the collect status.  */
  61
  62 struct fast_tpoint_collect_status
  63 {
  64   /* The tracepoint that is presently being collected.  */
  65   int tpoint_num;
  66   CORE_ADDR tpoint_addr;
  67
  68   /* The address range in the jump pad of where the original
  69      instruction the tracepoint jump was inserted was relocated
  70      to.  */
  71   CORE_ADDR adjusted_insn_addr;
  72   CORE_ADDR adjusted_insn_addr_end;
  73 };
  74
  75 int fast_tracepoint_collecting (CORE_ADDR thread_area,
  76                                 CORE_ADDR stop_pc,
  77                                 struct fast_tpoint_collect_status *status);
  78 void force_unlock_trace_buffer (void);
  79
  80 int handle_tracepoint_bkpts (struct thread_info *tinfo, CORE_ADDR stop_pc);
  81
  82 #ifdef IN_PROCESS_AGENT
  83 void initialize_low_tracepoint (void);
  84 void supply_fast_tracepoint_registers (struct regcache *regcache,
  85                                        const unsigned char *regs);
  86 void supply_static_tracepoint_registers (struct regcache *regcache,
  87                                          const unsigned char *regs,
  88                                          CORE_ADDR pc);
  89 void set_trampoline_buffer_space (CORE_ADDR begin, CORE_ADDR end,
  90                                   char *errmsg);
  91
  92 extern const struct target_desc *ipa_tdesc;
  93
  94 #else
  95 void stop_tracing (void);
  96
  97 int claim_trampoline_space (ULONGEST used, CORE_ADDR *trampoline);
  98 int have_fast_tracepoint_trampoline_buffer (char *msgbuf);
  99 void gdb_agent_about_to_close (int pid);
 100 #endif
 101
 102 struct traceframe;
 103 struct eval_agent_expr_context;
 104
 105 /* Do memory copies for bytecodes.  */
 106 /* Do the recording of memory blocks for actions and bytecodes.  */
 107
 108 int agent_mem_read (struct eval_agent_expr_context *ctx,
 109                     unsigned char *to, CORE_ADDR from,
 110                     ULONGEST len);
 111
 112 LONGEST agent_get_trace_state_variable_value (int num);
 113 void agent_set_trace_state_variable_value (int num, LONGEST val);
 114
 115 /* Record the value of a trace state variable.  */
 116
 117 int agent_tsv_read (struct eval_agent_expr_context *ctx, int n);
 118 int agent_mem_read_string (struct eval_agent_expr_context *ctx,
 119                            unsigned char *to,
 120                            CORE_ADDR from,
 121                            ULONGEST len);
 122
 123 /* Returns the address of the get_raw_reg function in the IPA.  */
 124 CORE_ADDR get_raw_reg_func_addr (void);
 125 /* Returns the address of the get_trace_state_variable_value
 126    function in the IPA.  */
 127 CORE_ADDR get_get_tsv_func_addr (void);
 128 /* Returns the address of the set_trace_state_variable_value
 129    function in the IPA.  */
 130 CORE_ADDR get_set_tsv_func_addr (void);
 131
 132 #endif /* TRACEPOINT_H */