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270c6aea | 1 | /* Tracepoint code for remote server for GDB. |
618f726f | 2 | Copyright (C) 1993-2016 Free Software Foundation, Inc. |
270c6aea PA |
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 | ||
3c14e5a3 PA |
28 | #if defined(__GNUC__) |
29 | # define ATTR_USED __attribute__((used)) | |
30 | # define ATTR_NOINLINE __attribute__((noinline)) | |
31 | #else | |
32 | # define ATTR_USED | |
33 | # define ATTR_NOINLINE | |
34 | #endif | |
35 | ||
36 | /* How to make symbol public/exported. */ | |
37 | ||
38 | #if defined _WIN32 || defined __CYGWIN__ | |
39 | # define EXPORTED_SYMBOL __declspec (dllexport) | |
40 | #else | |
41 | # if __GNUC__ >= 4 | |
42 | # define EXPORTED_SYMBOL __attribute__ ((visibility ("default"))) | |
43 | # else | |
44 | # define EXPORTED_SYMBOL | |
45 | # endif | |
46 | #endif | |
47 | ||
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 | |
50 | have C linkage. | |
51 | ||
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. */ | |
59 | ||
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 | |
64 | #else | |
65 | # define IP_AGENT_EXPORT_FUNC | |
66 | # define IP_AGENT_EXPORT_VAR | |
67 | # define IP_AGENT_EXPORT_VAR_DECL extern | |
68 | #endif | |
69 | ||
70 | IP_AGENT_EXPORT_VAR_DECL int tracing; | |
71 | ||
270c6aea PA |
72 | extern int disconnected_tracing; |
73 | ||
74 | void tracepoint_look_up_symbols (void); | |
75 | ||
76 | void stop_tracing (void); | |
77 | ||
78 | int handle_tracepoint_general_set (char *own_buf); | |
79 | int handle_tracepoint_query (char *own_buf); | |
80 | ||
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); | |
83 | ||
84 | void release_while_stepping_state_list (struct thread_info *tinfo); | |
85 | ||
86 | extern int current_traceframe; | |
87 | ||
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, | |
91 | ULONGEST *nbytes); | |
92 | int fetch_traceframe_registers (int tfnum, | |
93 | struct regcache *regcache, | |
94 | int regnum); | |
95 | ||
96 | int traceframe_read_sdata (int tfnum, ULONGEST offset, | |
97 | unsigned char *buf, ULONGEST length, | |
98 | ULONGEST *nbytes); | |
99 | ||
100 | int traceframe_read_info (int tfnum, struct buffer *buffer); | |
101 | ||
102 | /* If a thread is determined to be collecting a fast tracepoint, this | |
103 | structure holds the collect status. */ | |
104 | ||
105 | struct fast_tpoint_collect_status | |
106 | { | |
107 | /* The tracepoint that is presently being collected. */ | |
108 | int tpoint_num; | |
109 | CORE_ADDR tpoint_addr; | |
110 | ||
111 | /* The address range in the jump pad of where the original | |
112 | instruction the tracepoint jump was inserted was relocated | |
113 | to. */ | |
114 | CORE_ADDR adjusted_insn_addr; | |
115 | CORE_ADDR adjusted_insn_addr_end; | |
116 | }; | |
117 | ||
118 | int fast_tracepoint_collecting (CORE_ADDR thread_area, | |
119 | CORE_ADDR stop_pc, | |
120 | struct fast_tpoint_collect_status *status); | |
121 | void force_unlock_trace_buffer (void); | |
122 | ||
123 | int handle_tracepoint_bkpts (struct thread_info *tinfo, CORE_ADDR stop_pc); | |
124 | ||
125 | #ifdef IN_PROCESS_AGENT | |
126 | void initialize_low_tracepoint (void); | |
ae91f625 | 127 | const struct target_desc *get_ipa_tdesc (int idx); |
270c6aea PA |
128 | void supply_fast_tracepoint_registers (struct regcache *regcache, |
129 | const unsigned char *regs); | |
130 | void supply_static_tracepoint_registers (struct regcache *regcache, | |
131 | const unsigned char *regs, | |
132 | CORE_ADDR pc); | |
133 | void set_trampoline_buffer_space (CORE_ADDR begin, CORE_ADDR end, | |
134 | char *errmsg); | |
a13c4696 MK |
135 | void *alloc_jump_pad_buffer (size_t size); |
136 | #ifndef HAVE_GETAUXVAL | |
137 | unsigned long getauxval (unsigned long type); | |
138 | #endif | |
270c6aea PA |
139 | #else |
140 | void stop_tracing (void); | |
141 | ||
142 | int claim_trampoline_space (ULONGEST used, CORE_ADDR *trampoline); | |
143 | int have_fast_tracepoint_trampoline_buffer (char *msgbuf); | |
144 | void gdb_agent_about_to_close (int pid); | |
145 | #endif | |
146 | ||
147 | struct traceframe; | |
148 | struct eval_agent_expr_context; | |
149 | ||
150 | /* Do memory copies for bytecodes. */ | |
151 | /* Do the recording of memory blocks for actions and bytecodes. */ | |
152 | ||
153 | int agent_mem_read (struct eval_agent_expr_context *ctx, | |
154 | unsigned char *to, CORE_ADDR from, | |
155 | ULONGEST len); | |
156 | ||
157 | LONGEST agent_get_trace_state_variable_value (int num); | |
158 | void agent_set_trace_state_variable_value (int num, LONGEST val); | |
159 | ||
160 | /* Record the value of a trace state variable. */ | |
161 | ||
162 | int agent_tsv_read (struct eval_agent_expr_context *ctx, int n); | |
163 | int agent_mem_read_string (struct eval_agent_expr_context *ctx, | |
164 | unsigned char *to, | |
165 | CORE_ADDR from, | |
166 | ULONGEST len); | |
167 | ||
3c14e5a3 PA |
168 | /* The prototype the get_raw_reg function in the IPA. Each arch's |
169 | bytecode compiler emits calls to this function. */ | |
1cda1512 | 170 | ULONGEST get_raw_reg (const unsigned char *raw_regs, int regnum); |
3c14e5a3 | 171 | |
270c6aea PA |
172 | /* Returns the address of the get_raw_reg function in the IPA. */ |
173 | CORE_ADDR get_raw_reg_func_addr (void); | |
174 | /* Returns the address of the get_trace_state_variable_value | |
175 | function in the IPA. */ | |
176 | CORE_ADDR get_get_tsv_func_addr (void); | |
177 | /* Returns the address of the set_trace_state_variable_value | |
178 | function in the IPA. */ | |
179 | CORE_ADDR get_set_tsv_func_addr (void); | |
180 | ||
181 | #endif /* TRACEPOINT_H */ |