1 /* Tracepoint code for remote server for GDB.
2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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/>. */
22 /* Size for a small buffer to report problems from the in-process
23 agent back to GDBserver. */
24 #define IPA_BUFSIZ 100
26 void initialize_tracepoint (void);
29 # define ATTR_USED __attribute__((used))
30 # define ATTR_NOINLINE __attribute__((noinline))
33 # define ATTR_NOINLINE
36 /* How to make symbol public/exported. */
38 #if defined _WIN32 || defined __CYGWIN__
39 # define EXPORTED_SYMBOL __declspec (dllexport)
42 # define EXPORTED_SYMBOL __attribute__ ((visibility ("default")))
44 # define EXPORTED_SYMBOL
48 /* Use these to make sure the functions and variables the IPA needs to
49 export (symbols GDBserver needs to query GDB about) are visible and
52 Tag exported functions with IP_AGENT_EXPORT_FUNC, tag the
53 definitions of exported variables with IP_AGENT_EXPORT_VAR, and
54 variable declarations with IP_AGENT_EXPORT_VAR_DECL. Variables
55 must also be exported with C linkage. As we can't both use extern
56 "C" and initialize a variable in the same statement, variables that
57 don't have a separate declaration must use
58 EXTERN_C_PUSH/EXTERN_C_POP around their definition. */
60 #ifdef IN_PROCESS_AGENT
61 # define IP_AGENT_EXPORT_FUNC EXTERN_C EXPORTED_SYMBOL ATTR_NOINLINE ATTR_USED
62 # define IP_AGENT_EXPORT_VAR EXPORTED_SYMBOL ATTR_USED
63 # define IP_AGENT_EXPORT_VAR_DECL EXTERN_C EXPORTED_SYMBOL
65 # define IP_AGENT_EXPORT_FUNC
66 # define IP_AGENT_EXPORT_VAR
67 # define IP_AGENT_EXPORT_VAR_DECL extern
70 IP_AGENT_EXPORT_VAR_DECL
int tracing
;
72 extern int disconnected_tracing
;
74 void tracepoint_look_up_symbols (void);
76 void stop_tracing (void);
78 int handle_tracepoint_general_set (char *own_buf
);
79 int handle_tracepoint_query (char *own_buf
);
81 int tracepoint_finished_step (struct thread_info
*tinfo
, CORE_ADDR stop_pc
);
82 int tracepoint_was_hit (struct thread_info
*tinfo
, CORE_ADDR stop_pc
);
84 void release_while_stepping_state_list (struct thread_info
*tinfo
);
86 extern int current_traceframe
;
88 int in_readonly_region (CORE_ADDR addr
, ULONGEST length
);
89 int traceframe_read_mem (int tfnum
, CORE_ADDR addr
,
90 unsigned char *buf
, ULONGEST length
,
92 int fetch_traceframe_registers (int tfnum
,
93 struct regcache
*regcache
,
96 int traceframe_read_sdata (int tfnum
, ULONGEST offset
,
97 unsigned char *buf
, ULONGEST length
,
100 int traceframe_read_info (int tfnum
, struct buffer
*buffer
);
102 /* If a thread is determined to be collecting a fast tracepoint, this
103 structure holds the collect status. */
105 struct fast_tpoint_collect_status
107 /* The tracepoint that is presently being collected. */
109 CORE_ADDR tpoint_addr
;
111 /* The address range in the jump pad of where the original
112 instruction the tracepoint jump was inserted was relocated
114 CORE_ADDR adjusted_insn_addr
;
115 CORE_ADDR adjusted_insn_addr_end
;
118 int fast_tracepoint_collecting (CORE_ADDR thread_area
,
120 struct fast_tpoint_collect_status
*status
);
121 void force_unlock_trace_buffer (void);
123 int handle_tracepoint_bkpts (struct thread_info
*tinfo
, CORE_ADDR stop_pc
);
125 #ifdef IN_PROCESS_AGENT
126 void initialize_low_tracepoint (void);
127 void supply_fast_tracepoint_registers (struct regcache
*regcache
,
128 const unsigned char *regs
);
129 void supply_static_tracepoint_registers (struct regcache
*regcache
,
130 const unsigned char *regs
,
132 void set_trampoline_buffer_space (CORE_ADDR begin
, CORE_ADDR end
,
135 extern const struct target_desc
*ipa_tdesc
;
138 void stop_tracing (void);
140 int claim_trampoline_space (ULONGEST used
, CORE_ADDR
*trampoline
);
141 int have_fast_tracepoint_trampoline_buffer (char *msgbuf
);
142 void gdb_agent_about_to_close (int pid
);
146 struct eval_agent_expr_context
;
148 /* Do memory copies for bytecodes. */
149 /* Do the recording of memory blocks for actions and bytecodes. */
151 int agent_mem_read (struct eval_agent_expr_context
*ctx
,
152 unsigned char *to
, CORE_ADDR from
,
155 LONGEST
agent_get_trace_state_variable_value (int num
);
156 void agent_set_trace_state_variable_value (int num
, LONGEST val
);
158 /* Record the value of a trace state variable. */
160 int agent_tsv_read (struct eval_agent_expr_context
*ctx
, int n
);
161 int agent_mem_read_string (struct eval_agent_expr_context
*ctx
,
166 /* The prototype the get_raw_reg function in the IPA. Each arch's
167 bytecode compiler emits calls to this function. */
168 IP_AGENT_EXPORT_FUNC ULONGEST gdb_agent_get_raw_reg
169 (const unsigned char *raw_regs
, int regnum
);
171 /* Returns the address of the get_raw_reg function in the IPA. */
172 CORE_ADDR
get_raw_reg_func_addr (void);
173 /* Returns the address of the get_trace_state_variable_value
174 function in the IPA. */
175 CORE_ADDR
get_get_tsv_func_addr (void);
176 /* Returns the address of the set_trace_state_variable_value
177 function in the IPA. */
178 CORE_ADDR
get_set_tsv_func_addr (void);
180 #endif /* TRACEPOINT_H */