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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 // Assuming that stack grows from lower addresses | 140 // Assuming that stack grows from lower addresses |
141 if (sample->sp < sample->fp && sample->fp < low_stack_bound_) { | 141 if (sample->state != GC |
| 142 && (sample->sp < sample->fp && sample->fp < low_stack_bound_)) { |
142 sample->InitStack(1); | 143 sample->InitStack(1); |
143 sample->stack[0] = Memory::Address_at( | 144 sample->stack[0] = Memory::Address_at( |
144 (Address)(sample->fp + StandardFrameConstants::kCallerPCOffset)); | 145 (Address)(sample->fp + StandardFrameConstants::kCallerPCOffset)); |
145 } else { | 146 } else { |
146 // FP seems to be in some intermediate state, better discard this sample | 147 // GC runs or FP seems to be in some intermediate state, |
| 148 // better discard this sample |
147 sample->InitStack(0); | 149 sample->InitStack(0); |
148 } | 150 } |
149 } | 151 } |
150 | 152 |
151 | 153 |
152 // | 154 // |
153 // Ticker used to provide ticks to the profiler and the sliding state | 155 // Ticker used to provide ticks to the profiler and the sliding state |
154 // window. | 156 // window. |
155 // | 157 // |
156 class Ticker: public Sampler { | 158 class Ticker: public Sampler { |
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1134 if (FLAG_log_state_changes) { | 1136 if (FLAG_log_state_changes) { |
1135 LOG(UncheckedStringEvent("Leaving", StateToString(state_))); | 1137 LOG(UncheckedStringEvent("Leaving", StateToString(state_))); |
1136 if (previous_) { | 1138 if (previous_) { |
1137 LOG(UncheckedStringEvent("To", StateToString(previous_->state_))); | 1139 LOG(UncheckedStringEvent("To", StateToString(previous_->state_))); |
1138 } | 1140 } |
1139 } | 1141 } |
1140 } | 1142 } |
1141 #endif | 1143 #endif |
1142 | 1144 |
1143 } } // namespace v8::internal | 1145 } } // namespace v8::internal |
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