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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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131 }; | 131 }; |
132 | 132 |
133 bool Profiler::paused_ = false; | 133 bool Profiler::paused_ = false; |
134 | 134 |
135 | 135 |
136 // | 136 // |
137 // StackTracer implementation | 137 // StackTracer implementation |
138 // | 138 // |
139 void StackTracer::Trace(TickSample* sample) { | 139 void StackTracer::Trace(TickSample* sample) { |
140 if (sample->state == GC) { | 140 if (sample->state == GC) { |
141 sample->InitStack(0); | 141 sample->frames_count = 0; |
142 return; | 142 return; |
143 } | 143 } |
144 | 144 |
145 // If c_entry_fp is available, this means that we are inside a C++ | 145 // If c_entry_fp is available, this means that we are inside a C++ |
146 // function and sample->fp value isn't reliable due to FPO | 146 // function and sample->fp value isn't reliable due to FPO. |
147 if (Top::c_entry_fp(Top::GetCurrentThread()) != NULL) { | 147 if (Top::c_entry_fp(Top::GetCurrentThread()) != NULL) { |
148 SafeStackTraceFrameIterator it( | 148 SafeStackTraceFrameIterator it( |
149 reinterpret_cast<Address>(sample->sp), | 149 reinterpret_cast<Address>(sample->sp), |
150 reinterpret_cast<Address>(low_stack_bound_)); | 150 reinterpret_cast<Address>(low_stack_bound_)); |
151 // Pass 1: Calculate depth | 151 int i = 0; |
152 int depth = 0; | 152 while (!it.done() && i < TickSample::kMaxFramesCount) { |
153 while (!it.done() && depth <= kMaxStackFrames) { | 153 sample->stack[i++] = it.frame()->pc(); |
154 ++depth; | |
155 it.Advance(); | 154 it.Advance(); |
156 } | 155 } |
157 // Pass 2: Save stack | 156 sample->frames_count = i; |
158 sample->InitStack(depth); | |
159 if (depth > 0) { | |
160 it.Reset(); | |
161 for (int i = 0; i < depth && !it.done(); ++i, it.Advance()) { | |
162 sample->stack[i] = it.frame()->pc(); | |
163 } | |
164 } | |
165 } else if (sample->sp < sample->fp && sample->fp < low_stack_bound_) { | 157 } else if (sample->sp < sample->fp && sample->fp < low_stack_bound_) { |
166 // The check assumes that stack grows from lower addresses | 158 // The check assumes that stack grows from lower addresses. |
167 sample->InitStack(1); | |
168 sample->stack[0] = Memory::Address_at( | 159 sample->stack[0] = Memory::Address_at( |
169 (Address)(sample->fp + StandardFrameConstants::kCallerPCOffset)); | 160 (Address)(sample->fp + StandardFrameConstants::kCallerPCOffset)); |
| 161 sample->frames_count = 1; |
170 } else { | 162 } else { |
171 // FP seems to be in some intermediate state, | 163 // FP seems to be in some intermediate state, |
172 // better discard this sample | 164 // better discard this sample |
173 sample->InitStack(0); | 165 sample->frames_count = 0; |
174 } | 166 } |
175 } | 167 } |
176 | 168 |
177 | 169 |
178 // | 170 // |
179 // Ticker used to provide ticks to the profiler and the sliding state | 171 // Ticker used to provide ticks to the profiler and the sliding state |
180 // window. | 172 // window. |
181 // | 173 // |
182 class Ticker: public Sampler { | 174 class Ticker: public Sampler { |
183 public: | 175 public: |
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938 | 930 |
939 #ifdef ENABLE_LOGGING_AND_PROFILING | 931 #ifdef ENABLE_LOGGING_AND_PROFILING |
940 void Logger::TickEvent(TickSample* sample, bool overflow) { | 932 void Logger::TickEvent(TickSample* sample, bool overflow) { |
941 if (logfile_ == NULL || !FLAG_prof) return; | 933 if (logfile_ == NULL || !FLAG_prof) return; |
942 LogMessageBuilder msg; | 934 LogMessageBuilder msg; |
943 msg.Append("tick,0x%x,0x%x,%d", sample->pc, sample->sp, | 935 msg.Append("tick,0x%x,0x%x,%d", sample->pc, sample->sp, |
944 static_cast<int>(sample->state)); | 936 static_cast<int>(sample->state)); |
945 if (overflow) { | 937 if (overflow) { |
946 msg.Append(",overflow"); | 938 msg.Append(",overflow"); |
947 } | 939 } |
948 if (*(sample->stack)) { | 940 for (int i = 0; i < sample->frames_count; ++i) { |
949 for (size_t i = 0; sample->stack[i]; ++i) { | 941 msg.Append(",%p", sample->stack[i]); |
950 msg.Append(",0x%x", reinterpret_cast<unsigned int>(sample->stack[i])); | |
951 } | |
952 } | 942 } |
953 msg.Append('\n'); | 943 msg.Append('\n'); |
954 msg.WriteToLogFile(); | 944 msg.WriteToLogFile(); |
955 } | 945 } |
956 | 946 |
957 | 947 |
958 bool Logger::IsProfilerPaused() { | 948 bool Logger::IsProfilerPaused() { |
959 return profiler_->paused(); | 949 return profiler_->paused(); |
960 } | 950 } |
961 | 951 |
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1151 if (FLAG_log_state_changes) { | 1141 if (FLAG_log_state_changes) { |
1152 LOG(UncheckedStringEvent("Leaving", StateToString(state_))); | 1142 LOG(UncheckedStringEvent("Leaving", StateToString(state_))); |
1153 if (previous_) { | 1143 if (previous_) { |
1154 LOG(UncheckedStringEvent("To", StateToString(previous_->state_))); | 1144 LOG(UncheckedStringEvent("To", StateToString(previous_->state_))); |
1155 } | 1145 } |
1156 } | 1146 } |
1157 } | 1147 } |
1158 #endif | 1148 #endif |
1159 | 1149 |
1160 } } // namespace v8::internal | 1150 } } // namespace v8::internal |
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