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
|
//===-- ThreadPlanBase.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 "lldb/Target/ThreadPlanBase.h"
//
#include "lldb/Breakpoint/Breakpoint.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Breakpoint/BreakpointSite.h"
#include "lldb/Breakpoint/StoppointCallbackContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StopInfo.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Stream.h"
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------
// ThreadPlanBase: This one always stops, and never has anything particular to
// do.
// FIXME: The "signal handling" policies should probably go here.
//----------------------------------------------------------------------
ThreadPlanBase::ThreadPlanBase(Thread &thread)
: ThreadPlan(ThreadPlan::eKindBase, "base plan", thread, eVoteYes,
eVoteNoOpinion) {
// Set the tracer to a default tracer.
// FIXME: need to add a thread settings variable to pix various tracers...
#define THREAD_PLAN_USE_ASSEMBLY_TRACER 1
#ifdef THREAD_PLAN_USE_ASSEMBLY_TRACER
ThreadPlanTracerSP new_tracer_sp(new ThreadPlanAssemblyTracer(m_thread));
#else
ThreadPlanTracerSP new_tracer_sp(new ThreadPlanTracer(m_thread));
#endif
new_tracer_sp->EnableTracing(m_thread.GetTraceEnabledState());
SetThreadPlanTracer(new_tracer_sp);
SetIsMasterPlan(true);
}
ThreadPlanBase::~ThreadPlanBase() {}
void ThreadPlanBase::GetDescription(Stream *s, lldb::DescriptionLevel level) {
s->Printf("Base thread plan.");
}
bool ThreadPlanBase::ValidatePlan(Stream *error) { return true; }
bool ThreadPlanBase::DoPlanExplainsStop(Event *event_ptr) {
// The base plan should defer to its tracer, since by default it always
// handles the stop.
return !TracerExplainsStop();
}
Vote ThreadPlanBase::ShouldReportStop(Event *event_ptr) {
StopInfoSP stop_info_sp = m_thread.GetStopInfo();
if (stop_info_sp) {
bool should_notify = stop_info_sp->ShouldNotify(event_ptr);
if (should_notify)
return eVoteYes;
else
return eVoteNoOpinion;
} else
return eVoteNoOpinion;
}
bool ThreadPlanBase::ShouldStop(Event *event_ptr) {
m_stop_vote = eVoteYes;
m_run_vote = eVoteYes;
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_STEP));
StopInfoSP stop_info_sp = GetPrivateStopInfo();
if (stop_info_sp) {
StopReason reason = stop_info_sp->GetStopReason();
switch (reason) {
case eStopReasonInvalid:
case eStopReasonNone:
// This
m_run_vote = eVoteNoOpinion;
m_stop_vote = eVoteNo;
return false;
case eStopReasonBreakpoint:
case eStopReasonWatchpoint:
if (stop_info_sp->ShouldStopSynchronous(event_ptr)) {
// If we are going to stop for a breakpoint, then unship the other
// plans at this point. Don't force the discard, however, so Master
// plans can stay in place if they want to.
if (log)
log->Printf(
"Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64
" (breakpoint hit.)",
m_thread.GetID());
m_thread.DiscardThreadPlans(false);
return true;
}
// If we aren't going to stop at this breakpoint, and it is internal,
// don't report this stop or the subsequent running event. Otherwise we
// will post the stopped & running, but the stopped event will get marked
// with "restarted" so the UI will know to wait and expect the consequent
// "running".
if (stop_info_sp->ShouldNotify(event_ptr)) {
m_stop_vote = eVoteYes;
m_run_vote = eVoteYes;
} else {
m_stop_vote = eVoteNo;
m_run_vote = eVoteNo;
}
return false;
// TODO: the break below was missing, was this intentional??? If so
// please mention it
break;
case eStopReasonException:
// If we crashed, discard thread plans and stop. Don't force the
// discard, however, since on rerun the target may clean up this
// exception and continue normally from there.
if (log)
log->Printf(
"Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64
" (exception: %s)",
m_thread.GetID(), stop_info_sp->GetDescription());
m_thread.DiscardThreadPlans(false);
return true;
case eStopReasonExec:
// If we crashed, discard thread plans and stop. Don't force the
// discard, however, since on rerun the target may clean up this
// exception and continue normally from there.
if (log)
log->Printf(
"Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64
" (exec.)",
m_thread.GetID());
m_thread.DiscardThreadPlans(false);
return true;
case eStopReasonThreadExiting:
case eStopReasonSignal:
if (stop_info_sp->ShouldStop(event_ptr)) {
if (log)
log->Printf(
"Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64
" (signal: %s)",
m_thread.GetID(), stop_info_sp->GetDescription());
m_thread.DiscardThreadPlans(false);
return true;
} else {
// We're not going to stop, but while we are here, let's figure out
// whether to report this.
if (stop_info_sp->ShouldNotify(event_ptr))
m_stop_vote = eVoteYes;
else
m_stop_vote = eVoteNo;
}
return false;
default:
return true;
}
} else {
m_run_vote = eVoteNoOpinion;
m_stop_vote = eVoteNo;
}
// If there's no explicit reason to stop, then we will continue.
return false;
}
bool ThreadPlanBase::StopOthers() { return false; }
StateType ThreadPlanBase::GetPlanRunState() { return eStateRunning; }
bool ThreadPlanBase::WillStop() { return true; }
bool ThreadPlanBase::DoWillResume(lldb::StateType resume_state,
bool current_plan) {
// Reset these to the default values so we don't set them wrong, then not get
// asked for a while, then return the wrong answer.
m_run_vote = eVoteNoOpinion;
m_stop_vote = eVoteNo;
return true;
}
// The base plan is never done.
bool ThreadPlanBase::MischiefManaged() {
// The base plan is never done.
return false;
}
|
