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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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| 142 return new PosixMemoryMappedFile(file, memory, size); | 142 return new PosixMemoryMappedFile(file, memory, size); |
| 143 } | 143 } |
| 144 | 144 |
| 145 | 145 |
| 146 PosixMemoryMappedFile::~PosixMemoryMappedFile() { | 146 PosixMemoryMappedFile::~PosixMemoryMappedFile() { |
| 147 if (memory_) OS::Free(memory_, size_); | 147 if (memory_) OS::Free(memory_, size_); |
| 148 fclose(file_); | 148 fclose(file_); |
| 149 } | 149 } |
| 150 | 150 |
| 151 | 151 |
| 152 void OS::LogSharedLibraryAddresses() { | 152 void OS::LogSharedLibraryAddresses(Isolate* isolate) { |
| 153 // This function assumes that the layout of the file is as follows: | 153 // This function assumes that the layout of the file is as follows: |
| 154 // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name] | 154 // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name] |
| 155 // If we encounter an unexpected situation we abort scanning further entries. | 155 // If we encounter an unexpected situation we abort scanning further entries. |
| 156 FILE* fp = fopen("/proc/self/maps", "r"); | 156 FILE* fp = fopen("/proc/self/maps", "r"); |
| 157 if (fp == NULL) return; | 157 if (fp == NULL) return; |
| 158 | 158 |
| 159 // Allocate enough room to be able to store a full file name. | 159 // Allocate enough room to be able to store a full file name. |
| 160 const int kLibNameLen = FILENAME_MAX + 1; | 160 const int kLibNameLen = FILENAME_MAX + 1; |
| 161 char* lib_name = reinterpret_cast<char*>(malloc(kLibNameLen)); | 161 char* lib_name = reinterpret_cast<char*>(malloc(kLibNameLen)); |
| 162 | 162 |
| 163 i::Isolate* isolate = ISOLATE; | |
| 164 // This loop will terminate once the scanning hits an EOF. | 163 // This loop will terminate once the scanning hits an EOF. |
| 165 while (true) { | 164 while (true) { |
| 166 uintptr_t start, end; | 165 uintptr_t start, end; |
| 167 char attr_r, attr_w, attr_x, attr_p; | 166 char attr_r, attr_w, attr_x, attr_p; |
| 168 // Parse the addresses and permission bits at the beginning of the line. | 167 // Parse the addresses and permission bits at the beginning of the line. |
| 169 if (fscanf(fp, "%" V8PRIxPTR "-%" V8PRIxPTR, &start, &end) != 2) break; | 168 if (fscanf(fp, "%" V8PRIxPTR "-%" V8PRIxPTR, &start, &end) != 2) break; |
| 170 if (fscanf(fp, " %c%c%c%c", &attr_r, &attr_w, &attr_x, &attr_p) != 4) break; | 169 if (fscanf(fp, " %c%c%c%c", &attr_r, &attr_w, &attr_x, &attr_p) != 4) break; |
| 171 | 170 |
| 172 int c; | 171 int c; |
| 173 if (attr_r == 'r' && attr_w != 'w' && attr_x == 'x') { | 172 if (attr_r == 'r' && attr_w != 'w' && attr_x == 'x') { |
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| 390 bool VirtualMemory::ReleaseRegion(void* base, size_t size) { | 389 bool VirtualMemory::ReleaseRegion(void* base, size_t size) { |
| 391 return munmap(base, size) == 0; | 390 return munmap(base, size) == 0; |
| 392 } | 391 } |
| 393 | 392 |
| 394 | 393 |
| 395 bool VirtualMemory::HasLazyCommits() { | 394 bool VirtualMemory::HasLazyCommits() { |
| 396 // TODO(alph): implement for the platform. | 395 // TODO(alph): implement for the platform. |
| 397 return false; | 396 return false; |
| 398 } | 397 } |
| 399 | 398 |
| 400 | |
| 401 void OS::SetUp() { | |
| 402 // Seed the random number generator. We preserve microsecond resolution. | |
| 403 uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis()) ^ (getpid() << 16); | |
| 404 srandom(static_cast<unsigned int>(seed)); | |
| 405 } | |
| 406 | |
| 407 | |
| 408 } } // namespace v8::internal | 399 } } // namespace v8::internal |
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