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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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| 903 // Allocate space for stack frames + pc + function + vm-state. | 903 // Allocate space for stack frames + pc + function + vm-state. |
| 904 ScopedVector<CodeEntry*> entries(sample.frames_count + 3); | 904 ScopedVector<CodeEntry*> entries(sample.frames_count + 3); |
| 905 // As actual number of decoded code entries may vary, initialize | 905 // As actual number of decoded code entries may vary, initialize |
| 906 // entries vector with NULL values. | 906 // entries vector with NULL values. |
| 907 CodeEntry** entry = entries.start(); | 907 CodeEntry** entry = entries.start(); |
| 908 memset(entry, 0, entries.length() * sizeof(*entry)); | 908 memset(entry, 0, entries.length() * sizeof(*entry)); |
| 909 if (sample.pc != NULL) { | 909 if (sample.pc != NULL) { |
| 910 Address start; | 910 Address start; |
| 911 CodeEntry* pc_entry = code_map_.FindEntry(sample.pc, &start); | 911 CodeEntry* pc_entry = code_map_.FindEntry(sample.pc, &start); |
| 912 // If pc is in the function code before it set up stack frame or after the | 912 // If pc is in the function code before it set up stack frame or after the |
| 913 // frame was destroyed SafeStackTraceFrameIterator incorrectly thinks that | 913 // frame was destroyed SafeStackFrameIterator incorrectly thinks that |
| 914 // ebp contains return address of the current function and skips caller's | 914 // ebp contains return address of the current function and skips caller's |
| 915 // frame. Check for this case and just skip such samples. | 915 // frame. Check for this case and just skip such samples. |
| 916 if (pc_entry) { | 916 if (pc_entry) { |
| 917 List<OffsetRange>* ranges = pc_entry->no_frame_ranges(); | 917 List<OffsetRange>* ranges = pc_entry->no_frame_ranges(); |
| 918 if (ranges) { | 918 if (ranges) { |
| 919 Code* code = Code::cast(HeapObject::FromAddress(start)); | 919 Code* code = Code::cast(HeapObject::FromAddress(start)); |
| 920 int pc_offset = static_cast<int>(sample.pc - code->instruction_start()); | 920 int pc_offset = static_cast<int>(sample.pc - code->instruction_start()); |
| 921 for (int i = 0; i < ranges->length(); i++) { | 921 for (int i = 0; i < ranges->length(); i++) { |
| 922 OffsetRange& range = ranges->at(i); | 922 OffsetRange& range = ranges->at(i); |
| 923 if (range.from <= pc_offset && pc_offset < range.to) { | 923 if (range.from <= pc_offset && pc_offset < range.to) { |
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| 956 if (no_symbolized_entries) { | 956 if (no_symbolized_entries) { |
| 957 *entry++ = EntryForVMState(sample.state); | 957 *entry++ = EntryForVMState(sample.state); |
| 958 } | 958 } |
| 959 } | 959 } |
| 960 | 960 |
| 961 profiles_->AddPathToCurrentProfiles(entries); | 961 profiles_->AddPathToCurrentProfiles(entries); |
| 962 } | 962 } |
| 963 | 963 |
| 964 | 964 |
| 965 } } // namespace v8::internal | 965 } } // namespace v8::internal |
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