OLD | NEW |
1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "lib/stacktrace.h" | 5 #include "lib/stacktrace.h" |
6 #include "vm/bootstrap_natives.h" | 6 #include "vm/bootstrap_natives.h" |
| 7 #include "vm/debugger.h" |
7 #include "vm/exceptions.h" | 8 #include "vm/exceptions.h" |
| 9 #include "vm/native_entry.h" |
8 #include "vm/object_store.h" | 10 #include "vm/object_store.h" |
9 #include "vm/runtime_entry.h" | 11 #include "vm/runtime_entry.h" |
10 #include "vm/stack_frame.h" | 12 #include "vm/stack_frame.h" |
| 13 #include "vm/stack_trace.h" |
11 | 14 |
12 namespace dart { | 15 namespace dart { |
13 | 16 |
14 static void IterateFrames(const GrowableObjectArray& code_list, | 17 DECLARE_FLAG(bool, show_invisible_frames); |
15 const GrowableObjectArray& pc_offset_list, | 18 DEFINE_FLAG(int, |
16 int skip_frames) { | 19 max_async_stack_trace_frames, |
| 20 96, |
| 21 "Maximum number of asynchronous stack traces frames remembered in " |
| 22 "an asynchronous function activation"); |
| 23 |
| 24 static RawStackTrace* CurrentSyncStackTrace(Thread* thread, Isolate* isolate) { |
| 25 const Function& null_function = Function::Handle(); |
| 26 const intptr_t skip_frames = 1; |
| 27 |
| 28 // Determine how big the stack trace is. |
| 29 const intptr_t stack_trace_length = |
| 30 StackTraceUtils::CountFrames(skip_frames, null_function); |
| 31 |
| 32 // Allocate once. |
| 33 const Array& code_array = Array::Handle(Array::New(stack_trace_length)); |
| 34 const Array& pc_offset_array = Array::Handle(Array::New(stack_trace_length)); |
| 35 |
| 36 // Collect the frames. |
| 37 const intptr_t collected_frames_count = StackTraceUtils::CollectFrames( |
| 38 code_array, pc_offset_array, 0, stack_trace_length, skip_frames); |
| 39 |
| 40 ASSERT(collected_frames_count == stack_trace_length); |
| 41 |
| 42 return StackTrace::New(code_array, pc_offset_array); |
| 43 } |
| 44 |
| 45 |
| 46 static RawStackTrace* CurrentStackTrace( |
| 47 Thread* thread, |
| 48 Isolate* isolate, |
| 49 bool for_async_function, |
| 50 bool sane_async_stacks = FLAG_sane_async_stacks) { |
| 51 if (!sane_async_stacks) { |
| 52 // Return the synchronous stack trace. |
| 53 return CurrentSyncStackTrace(thread, isolate); |
| 54 } |
| 55 |
| 56 Code& code = Code::Handle(); |
| 57 Smi& offset = Smi::Handle(); |
| 58 Function& async_function = Function::Handle(); |
| 59 Array& async_code_array = Array::Handle(); |
| 60 Array& async_pc_offset_array = Array::Handle(); |
| 61 |
| 62 const intptr_t async_stack_trace_length = |
| 63 StackTraceUtils::ExtractAsyncStackTraceInfo( |
| 64 thread, &async_function, &async_code_array, &async_pc_offset_array); |
| 65 |
| 66 // Determine the size of the stack trace. |
| 67 const intptr_t extra_frames = for_async_function ? 1 : 0; |
| 68 const intptr_t skip_frames = 1; |
| 69 const intptr_t synchronous_stack_trace_length = |
| 70 StackTraceUtils::CountFrames(skip_frames, async_function); |
| 71 |
| 72 const intptr_t complete_length = async_stack_trace_length + |
| 73 synchronous_stack_trace_length + |
| 74 extra_frames; // For the asynchronous gap. |
| 75 |
| 76 // We only truncate the stack trace when collecting for asynchronous |
| 77 // stack traces. |
| 78 const bool truncate_stack_trace = |
| 79 for_async_function || (async_stack_trace_length > 0); |
| 80 |
| 81 const intptr_t capacity = |
| 82 (!truncate_stack_trace || |
| 83 (FLAG_max_async_stack_trace_frames > complete_length)) |
| 84 ? complete_length |
| 85 : FLAG_max_async_stack_trace_frames; |
| 86 |
| 87 // Allocate memory for the stack trace. |
| 88 const Array& code_array = Array::Handle(Array::New(capacity)); |
| 89 const Array& pc_offset_array = Array::Handle(Array::New(capacity)); |
| 90 |
| 91 intptr_t write_cursor = 0; |
| 92 if (for_async_function) { |
| 93 // Place the asynchronous gap marker at the top of the stack trace. |
| 94 code = StubCode::AsynchronousGapMarker_entry()->code(); |
| 95 ASSERT(!code.IsNull()); |
| 96 offset = Smi::New(0); |
| 97 code_array.SetAt(write_cursor, code); |
| 98 pc_offset_array.SetAt(write_cursor, offset); |
| 99 write_cursor++; |
| 100 } |
| 101 |
| 102 const intptr_t sync_frames_to_collect = |
| 103 (synchronous_stack_trace_length < (capacity - write_cursor)) |
| 104 ? synchronous_stack_trace_length |
| 105 : capacity - write_cursor; |
| 106 |
| 107 // Append the synchronous stack trace. |
| 108 const intptr_t collected_frames_count = |
| 109 StackTraceUtils::CollectFrames(code_array, pc_offset_array, write_cursor, |
| 110 sync_frames_to_collect, skip_frames); |
| 111 |
| 112 write_cursor += collected_frames_count; |
| 113 |
| 114 // Append the asynchronous stack trace. |
| 115 if (async_stack_trace_length > 0) { |
| 116 ASSERT(!async_code_array.IsNull()); |
| 117 ASSERT(!async_pc_offset_array.IsNull()); |
| 118 for (intptr_t i = 0; i < async_stack_trace_length; i++) { |
| 119 if (write_cursor == capacity) { |
| 120 break; |
| 121 } |
| 122 if (async_code_array.At(i) == Code::null()) { |
| 123 break; |
| 124 } |
| 125 code = Code::RawCast(async_code_array.At(i)); |
| 126 offset = Smi::RawCast(async_pc_offset_array.At(i)); |
| 127 code_array.SetAt(write_cursor, code); |
| 128 pc_offset_array.SetAt(write_cursor, offset); |
| 129 write_cursor++; |
| 130 } |
| 131 } |
| 132 |
| 133 return StackTrace::New(code_array, pc_offset_array); |
| 134 } |
| 135 |
| 136 |
| 137 DEFINE_NATIVE_ENTRY(StackTrace_current, 0) { |
| 138 return CurrentStackTrace(thread, isolate, false); |
| 139 } |
| 140 |
| 141 |
| 142 DEFINE_NATIVE_ENTRY(StackTrace_forAsyncMethod, 1) { |
| 143 GET_NON_NULL_NATIVE_ARGUMENT(Closure, async_op, arguments->NativeArgAt(0)); |
| 144 Debugger* debugger = isolate->debugger(); |
| 145 if ((debugger != NULL) && debugger->IsSingleStepping()) { |
| 146 // This native entry is only ever called from the async/async* entry |
| 147 // function. If we are single stepping at this point, treat it as a request |
| 148 // to single step into the async body. |
| 149 debugger->AsyncStepInto(async_op); |
| 150 } |
| 151 return CurrentStackTrace(thread, isolate, true); |
| 152 } |
| 153 |
| 154 |
| 155 DEFINE_NATIVE_ENTRY(AsyncStarMoveNext_debuggerStepCheck, 1) { |
| 156 GET_NON_NULL_NATIVE_ARGUMENT(Closure, async_op, arguments->NativeArgAt(0)); |
| 157 Debugger* debugger = isolate->debugger(); |
| 158 OS::PrintErr("*************************** 1\n"); |
| 159 if ((debugger != NULL) && debugger->IsSingleStepping()) { |
| 160 OS::PrintErr("*************************** 2\n"); |
| 161 // This native entry is only ever called from the async/async* entry |
| 162 // function. If we are single stepping at this point, treat it as a request |
| 163 // to single step into the async body. |
| 164 debugger->AsyncStepInto(async_op); |
| 165 } |
| 166 OS::PrintErr("*************************** 3\n"); |
| 167 return Object::null(); |
| 168 } |
| 169 |
| 170 |
| 171 DEFINE_NATIVE_ENTRY(StackTrace_clearAsyncThreadStackTrace, 0) { |
| 172 thread->clear_async_stack_trace(); |
| 173 return Object::null(); |
| 174 } |
| 175 |
| 176 |
| 177 DEFINE_NATIVE_ENTRY(StackTrace_setAsyncThreadStackTrace, 1) { |
| 178 GET_NON_NULL_NATIVE_ARGUMENT(StackTrace, stack_trace, |
| 179 arguments->NativeArgAt(0)); |
| 180 thread->set_async_stack_trace(stack_trace); |
| 181 return Object::null(); |
| 182 } |
| 183 |
| 184 |
| 185 static void AppendFrames(const GrowableObjectArray& code_list, |
| 186 const GrowableObjectArray& pc_offset_list, |
| 187 int skip_frames) { |
17 StackFrameIterator frames(StackFrameIterator::kDontValidateFrames); | 188 StackFrameIterator frames(StackFrameIterator::kDontValidateFrames); |
18 StackFrame* frame = frames.NextFrame(); | 189 StackFrame* frame = frames.NextFrame(); |
19 ASSERT(frame != NULL); // We expect to find a dart invocation frame. | 190 ASSERT(frame != NULL); // We expect to find a dart invocation frame. |
20 Code& code = Code::Handle(); | 191 Code& code = Code::Handle(); |
21 Smi& offset = Smi::Handle(); | 192 Smi& offset = Smi::Handle(); |
22 while (frame != NULL) { | 193 while (frame != NULL) { |
23 if (frame->IsDartFrame()) { | 194 if (frame->IsDartFrame()) { |
24 if (skip_frames > 0) { | 195 if (skip_frames > 0) { |
25 skip_frames--; | 196 skip_frames--; |
26 } else { | 197 } else { |
27 code = frame->LookupDartCode(); | 198 code = frame->LookupDartCode(); |
28 offset = Smi::New(frame->pc() - code.PayloadStart()); | 199 offset = Smi::New(frame->pc() - code.PayloadStart()); |
29 code_list.Add(code); | 200 code_list.Add(code); |
30 pc_offset_list.Add(offset); | 201 pc_offset_list.Add(offset); |
31 } | 202 } |
32 } | 203 } |
33 frame = frames.NextFrame(); | 204 frame = frames.NextFrame(); |
34 } | 205 } |
35 } | 206 } |
36 | 207 |
| 208 |
37 // Creates a StackTrace object from the current stack. | 209 // Creates a StackTrace object from the current stack. |
38 // | 210 // |
39 // Skips the first skip_frames Dart frames. | 211 // Skips the first skip_frames Dart frames. |
40 const StackTrace& GetCurrentStackTrace(int skip_frames) { | 212 const StackTrace& GetCurrentStackTrace(int skip_frames) { |
41 const GrowableObjectArray& code_list = | 213 const GrowableObjectArray& code_list = |
42 GrowableObjectArray::Handle(GrowableObjectArray::New()); | 214 GrowableObjectArray::Handle(GrowableObjectArray::New()); |
43 const GrowableObjectArray& pc_offset_list = | 215 const GrowableObjectArray& pc_offset_list = |
44 GrowableObjectArray::Handle(GrowableObjectArray::New()); | 216 GrowableObjectArray::Handle(GrowableObjectArray::New()); |
45 IterateFrames(code_list, pc_offset_list, skip_frames); | 217 AppendFrames(code_list, pc_offset_list, skip_frames); |
46 const Array& code_array = Array::Handle(Array::MakeArray(code_list)); | 218 const Array& code_array = Array::Handle(Array::MakeArray(code_list)); |
47 const Array& pc_offset_array = | 219 const Array& pc_offset_array = |
48 Array::Handle(Array::MakeArray(pc_offset_list)); | 220 Array::Handle(Array::MakeArray(pc_offset_list)); |
49 const StackTrace& stacktrace = | 221 const StackTrace& stacktrace = |
50 StackTrace::Handle(StackTrace::New(code_array, pc_offset_array)); | 222 StackTrace::Handle(StackTrace::New(code_array, pc_offset_array)); |
51 return stacktrace; | 223 return stacktrace; |
52 } | 224 } |
53 | 225 |
| 226 |
54 // An utility method for convenient printing of dart stack traces when | 227 // An utility method for convenient printing of dart stack traces when |
55 // inside 'gdb'. Note: This function will only work when there is a | 228 // inside 'gdb'. Note: This function will only work when there is a |
56 // valid exit frame information. It will not work when a breakpoint is | 229 // valid exit frame information. It will not work when a breakpoint is |
57 // set in dart code and control is got inside 'gdb' without going through | 230 // set in dart code and control is got inside 'gdb' without going through |
58 // the runtime or native transition stub. | 231 // the runtime or native transition stub. |
59 void _printCurrentStackTrace() { | 232 void _printCurrentStackTrace() { |
60 const StackTrace& stacktrace = GetCurrentStackTrace(0); | 233 const StackTrace& stacktrace = GetCurrentStackTrace(0); |
61 OS::PrintErr("=== Current Trace:\n%s===\n", stacktrace.ToCString()); | 234 OS::PrintErr("=== Current Trace:\n%s===\n", stacktrace.ToCString()); |
62 } | 235 } |
63 | 236 |
| 237 |
64 // Like _printCurrentStackTrace, but works in a NoSafepointScope. | 238 // Like _printCurrentStackTrace, but works in a NoSafepointScope. |
65 void _printCurrentStackTraceNoSafepoint() { | 239 void _printCurrentStackTraceNoSafepoint() { |
66 StackFrameIterator frames(StackFrameIterator::kDontValidateFrames); | 240 StackFrameIterator frames(StackFrameIterator::kDontValidateFrames); |
67 StackFrame* frame = frames.NextFrame(); | 241 StackFrame* frame = frames.NextFrame(); |
68 while (frame != NULL) { | 242 while (frame != NULL) { |
69 OS::Print("%s\n", frame->ToCString()); | 243 OS::PrintErr("%s\n", frame->ToCString()); |
70 frame = frames.NextFrame(); | 244 frame = frames.NextFrame(); |
71 } | 245 } |
72 } | 246 } |
73 | 247 |
74 DEFINE_NATIVE_ENTRY(StackTrace_current, 0) { | |
75 const StackTrace& stacktrace = GetCurrentStackTrace(1); | |
76 return stacktrace.raw(); | |
77 } | |
78 | |
79 } // namespace dart | 248 } // namespace dart |
OLD | NEW |