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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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| 73 } | 73 } |
| 74 | 74 |
| 75 | 75 |
| 76 void* OS::Allocate(const size_t requested, | 76 void* OS::Allocate(const size_t requested, |
| 77 size_t* allocated, | 77 size_t* allocated, |
| 78 bool is_executable) { | 78 bool is_executable) { |
| 79 const size_t msize = RoundUp(requested, sysconf(_SC_PAGESIZE)); | 79 const size_t msize = RoundUp(requested, sysconf(_SC_PAGESIZE)); |
| 80 int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); | 80 int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); |
| 81 void* mbase = mmap(NULL, msize, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | 81 void* mbase = mmap(NULL, msize, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 82 if (mbase == MAP_FAILED) { | 82 if (mbase == MAP_FAILED) { |
| 83 LOG(ISOLATE, StringEvent("OS::Allocate", "mmap failed")); | 83 LOG(Isolate::Current(), StringEvent("OS::Allocate", "mmap failed")); |
| 84 return NULL; | 84 return NULL; |
| 85 } | 85 } |
| 86 *allocated = msize; | 86 *allocated = msize; |
| 87 return mbase; | 87 return mbase; |
| 88 } | 88 } |
| 89 | 89 |
| 90 | 90 |
| 91 void OS::DumpBacktrace() { | 91 void OS::DumpBacktrace() { |
| 92 // Currently unsupported. | 92 // Currently unsupported. |
| 93 } | 93 } |
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| 145 // This function assumes that the layout of the file is as follows: | 145 // This function assumes that the layout of the file is as follows: |
| 146 // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name] | 146 // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name] |
| 147 // If we encounter an unexpected situation we abort scanning further entries. | 147 // If we encounter an unexpected situation we abort scanning further entries. |
| 148 FILE* fp = fopen("/proc/self/maps", "r"); | 148 FILE* fp = fopen("/proc/self/maps", "r"); |
| 149 if (fp == NULL) return; | 149 if (fp == NULL) return; |
| 150 | 150 |
| 151 // Allocate enough room to be able to store a full file name. | 151 // Allocate enough room to be able to store a full file name. |
| 152 const int kLibNameLen = FILENAME_MAX + 1; | 152 const int kLibNameLen = FILENAME_MAX + 1; |
| 153 char* lib_name = reinterpret_cast<char*>(malloc(kLibNameLen)); | 153 char* lib_name = reinterpret_cast<char*>(malloc(kLibNameLen)); |
| 154 | 154 |
| 155 i::Isolate* isolate = ISOLATE; | 155 i::Isolate* isolate = Isolate::Current(); |
| 156 // This loop will terminate once the scanning hits an EOF. | 156 // This loop will terminate once the scanning hits an EOF. |
| 157 while (true) { | 157 while (true) { |
| 158 uintptr_t start, end; | 158 uintptr_t start, end; |
| 159 char attr_r, attr_w, attr_x, attr_p; | 159 char attr_r, attr_w, attr_x, attr_p; |
| 160 // Parse the addresses and permission bits at the beginning of the line. | 160 // Parse the addresses and permission bits at the beginning of the line. |
| 161 if (fscanf(fp, "%" V8PRIxPTR "-%" V8PRIxPTR, &start, &end) != 2) break; | 161 if (fscanf(fp, "%" V8PRIxPTR "-%" V8PRIxPTR, &start, &end) != 2) break; |
| 162 if (fscanf(fp, " %c%c%c%c", &attr_r, &attr_w, &attr_x, &attr_p) != 4) break; | 162 if (fscanf(fp, " %c%c%c%c", &attr_r, &attr_w, &attr_x, &attr_p) != 4) break; |
| 163 | 163 |
| 164 int c; | 164 int c; |
| 165 if (attr_r == 'r' && attr_w != 'w' && attr_x == 'x') { | 165 if (attr_r == 'r' && attr_w != 'w' && attr_x == 'x') { |
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| 361 return VirtualFree(base, 0, MEM_RELEASE) != 0; | 361 return VirtualFree(base, 0, MEM_RELEASE) != 0; |
| 362 } | 362 } |
| 363 | 363 |
| 364 | 364 |
| 365 bool VirtualMemory::HasLazyCommits() { | 365 bool VirtualMemory::HasLazyCommits() { |
| 366 // TODO(alph): implement for the platform. | 366 // TODO(alph): implement for the platform. |
| 367 return false; | 367 return false; |
| 368 } | 368 } |
| 369 | 369 |
| 370 } } // namespace v8::internal | 370 } } // namespace v8::internal |
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