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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
//===-- CommandObjectThreadUtil.cpp -----------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "CommandObjectThreadUtil.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Thread.h"
using namespace lldb;
using namespace lldb_private;
using namespace llvm;
CommandObjectIterateOverThreads::CommandObjectIterateOverThreads(
CommandInterpreter &interpreter, const char *name, const char *help,
const char *syntax, uint32_t flags)
: CommandObjectParsed(interpreter, name, help, syntax, flags) {
// These commands all take thread ID's as arguments.
CommandArgumentData thread_arg{eArgTypeThreadIndex, eArgRepeatStar};
m_arguments.push_back({thread_arg});
}
CommandObjectMultipleThreads::CommandObjectMultipleThreads(
CommandInterpreter &interpreter, const char *name, const char *help,
const char *syntax, uint32_t flags)
: CommandObjectParsed(interpreter, name, help, syntax, flags) {
// These commands all take thread ID's as arguments.
CommandArgumentData thread_arg{eArgTypeThreadIndex, eArgRepeatStar};
m_arguments.push_back({thread_arg});
}
bool CommandObjectIterateOverThreads::DoExecute(Args &command,
CommandReturnObject &result) {
result.SetStatus(m_success_return);
bool all_threads = false;
if (command.GetArgumentCount() == 0) {
Thread *thread = m_exe_ctx.GetThreadPtr();
if (!thread || !HandleOneThread(thread->GetID(), result))
return false;
return result.Succeeded();
} else if (command.GetArgumentCount() == 1) {
all_threads = ::strcmp(command.GetArgumentAtIndex(0), "all") == 0;
m_unique_stacks = ::strcmp(command.GetArgumentAtIndex(0), "unique") == 0;
}
// Use tids instead of ThreadSPs to prevent deadlocking problems which
// result from JIT-ing code while iterating over the (locked) ThreadSP
// list.
std::vector<lldb::tid_t> tids;
if (all_threads || m_unique_stacks) {
Process *process = m_exe_ctx.GetProcessPtr();
for (ThreadSP thread_sp : process->Threads())
tids.push_back(thread_sp->GetID());
} else {
const size_t num_args = command.GetArgumentCount();
Process *process = m_exe_ctx.GetProcessPtr();
std::lock_guard<std::recursive_mutex> guard(
process->GetThreadList().GetMutex());
for (size_t i = 0; i < num_args; i++) {
uint32_t thread_idx;
if (!llvm::to_integer(command.GetArgumentAtIndex(i), thread_idx)) {
result.AppendErrorWithFormat("invalid thread specification: \"%s\"\n",
command.GetArgumentAtIndex(i));
return false;
}
ThreadSP thread =
process->GetThreadList().FindThreadByIndexID(thread_idx);
if (!thread) {
result.AppendErrorWithFormat("no thread with index: \"%s\"\n",
command.GetArgumentAtIndex(i));
return false;
}
tids.push_back(thread->GetID());
}
}
if (m_unique_stacks) {
// Iterate over threads, finding unique stack buckets.
std::set<UniqueStack> unique_stacks;
for (const lldb::tid_t &tid : tids) {
if (!BucketThread(tid, unique_stacks, result)) {
return false;
}
}
// Write the thread id's and unique call stacks to the output stream
Stream &strm = result.GetOutputStream();
Process *process = m_exe_ctx.GetProcessPtr();
for (const UniqueStack &stack : unique_stacks) {
// List the common thread ID's
const std::vector<uint32_t> &thread_index_ids =
stack.GetUniqueThreadIndexIDs();
strm.Format("{0} thread(s) ", thread_index_ids.size());
for (const uint32_t &thread_index_id : thread_index_ids) {
strm.Format("#{0} ", thread_index_id);
}
strm.EOL();
// List the shared call stack for this set of threads
uint32_t representative_thread_id = stack.GetRepresentativeThread();
ThreadSP thread = process->GetThreadList().FindThreadByIndexID(
representative_thread_id);
if (!HandleOneThread(thread->GetID(), result)) {
return false;
}
}
} else {
uint32_t idx = 0;
for (const lldb::tid_t &tid : tids) {
if (idx != 0 && m_add_return)
result.AppendMessage("");
if (!HandleOneThread(tid, result))
return false;
++idx;
}
}
return result.Succeeded();
}
bool CommandObjectIterateOverThreads::BucketThread(
lldb::tid_t tid, std::set<UniqueStack> &unique_stacks,
CommandReturnObject &result) {
// Grab the corresponding thread for the given thread id.
Process *process = m_exe_ctx.GetProcessPtr();
Thread *thread = process->GetThreadList().FindThreadByID(tid).get();
if (thread == nullptr) {
result.AppendErrorWithFormatv("Failed to process thread #{0}.\n", tid);
return false;
}
// Collect the each frame's address for this call-stack
std::stack<lldb::addr_t> stack_frames;
const uint32_t frame_count = thread->GetStackFrameCount();
for (uint32_t frame_index = 0; frame_index < frame_count; frame_index++) {
const lldb::StackFrameSP frame_sp =
thread->GetStackFrameAtIndex(frame_index);
const lldb::addr_t pc = frame_sp->GetStackID().GetPC();
stack_frames.push(pc);
}
uint32_t thread_index_id = thread->GetIndexID();
UniqueStack new_unique_stack(stack_frames, thread_index_id);
// Try to match the threads stack to and existing entry.
std::set<UniqueStack>::iterator matching_stack =
unique_stacks.find(new_unique_stack);
if (matching_stack != unique_stacks.end()) {
matching_stack->AddThread(thread_index_id);
} else {
unique_stacks.insert(new_unique_stack);
}
return true;
}
bool CommandObjectMultipleThreads::DoExecute(Args &command,
CommandReturnObject &result) {
Process &process = m_exe_ctx.GetProcessRef();
std::vector<lldb::tid_t> tids;
const size_t num_args = command.GetArgumentCount();
std::lock_guard<std::recursive_mutex> guard(
process.GetThreadList().GetMutex());
if (num_args > 0 && ::strcmp(command.GetArgumentAtIndex(0), "all") == 0) {
for (ThreadSP thread_sp : process.Threads())
tids.push_back(thread_sp->GetID());
} else {
if (num_args == 0) {
Thread &thread = m_exe_ctx.GetThreadRef();
tids.push_back(thread.GetID());
}
for (size_t i = 0; i < num_args; i++) {
uint32_t thread_idx;
if (!llvm::to_integer(command.GetArgumentAtIndex(i), thread_idx)) {
result.AppendErrorWithFormat("invalid thread specification: \"%s\"\n",
command.GetArgumentAtIndex(i));
return false;
}
ThreadSP thread = process.GetThreadList().FindThreadByIndexID(thread_idx);
if (!thread) {
result.AppendErrorWithFormat("no thread with index: \"%s\"\n",
command.GetArgumentAtIndex(i));
return false;
}
tids.push_back(thread->GetID());
}
}
return DoExecuteOnThreads(command, result, tids);
}
|
