1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/* Tracepoint code for remote server for GDB.
Copyright (C) 1993-2019 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
# 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 */
|
