| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Platform specific code for AIX goes here. For the POSIX comaptible parts |
| // the implementation is in platform-posix.cc. |
| |
| #include <pthread.h> |
| #include <semaphore.h> |
| #include <signal.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/resource.h> |
| #include <sys/time.h> |
| #include <sys/ucontext.h> |
| |
| #include <errno.h> |
| #include <fcntl.h> // open |
| #include <limits.h> |
| #include <stdarg.h> |
| #include <strings.h> // index |
| #include <sys/mman.h> // mmap & munmap |
| #include <sys/stat.h> // open |
| #include <sys/types.h> // mmap & munmap |
| #include <unistd.h> // getpagesize |
| |
| #include <cmath> |
| |
| #undef MAP_TYPE |
| |
| #include "src/base/macros.h" |
| #include "src/base/platform/platform-posix.h" |
| #include "src/base/platform/platform.h" |
| |
| namespace v8 { |
| namespace base { |
| |
| |
| class AIXTimezoneCache : public PosixTimezoneCache { |
| const char* LocalTimezone(double time) override; |
| |
| double LocalTimeOffset() override; |
| |
| ~AIXTimezoneCache() override {} |
| }; |
| |
| const char* AIXTimezoneCache::LocalTimezone(double time) { |
| if (std::isnan(time)) return ""; |
| time_t tv = static_cast<time_t>(floor(time / msPerSecond)); |
| struct tm tm; |
| struct tm* t = localtime_r(&tv, &tm); |
| if (nullptr == t) return ""; |
| return tzname[0]; // The location of the timezone string on AIX. |
| } |
| |
| double AIXTimezoneCache::LocalTimeOffset() { |
| // On AIX, struct tm does not contain a tm_gmtoff field. |
| time_t utc = time(nullptr); |
| DCHECK_NE(utc, -1); |
| struct tm tm; |
| struct tm* loc = localtime_r(&utc, &tm); |
| DCHECK_NOT_NULL(loc); |
| return static_cast<double>((mktime(loc) - utc) * msPerSecond); |
| } |
| |
| TimezoneCache* OS::CreateTimezoneCache() { return new AIXTimezoneCache(); } |
| |
| static unsigned StringToLong(char* buffer) { |
| return static_cast<unsigned>(strtol(buffer, nullptr, 16)); // NOLINT |
| } |
| |
| std::vector<OS::SharedLibraryAddress> OS::GetSharedLibraryAddresses() { |
| std::vector<SharedLibraryAddress> result; |
| static const int MAP_LENGTH = 1024; |
| int fd = open("/proc/self/maps", O_RDONLY); |
| if (fd < 0) return result; |
| while (true) { |
| char addr_buffer[11]; |
| addr_buffer[0] = '0'; |
| addr_buffer[1] = 'x'; |
| addr_buffer[10] = 0; |
| ssize_t rc = read(fd, addr_buffer + 2, 8); |
| if (rc < 8) break; |
| unsigned start = StringToLong(addr_buffer); |
| rc = read(fd, addr_buffer + 2, 1); |
| if (rc < 1) break; |
| if (addr_buffer[2] != '-') break; |
| rc = read(fd, addr_buffer + 2, 8); |
| if (rc < 8) break; |
| unsigned end = StringToLong(addr_buffer); |
| char buffer[MAP_LENGTH]; |
| int bytes_read = -1; |
| do { |
| bytes_read++; |
| if (bytes_read >= MAP_LENGTH - 1) break; |
| rc = read(fd, buffer + bytes_read, 1); |
| if (rc < 1) break; |
| } while (buffer[bytes_read] != '\n'); |
| buffer[bytes_read] = 0; |
| // Ignore mappings that are not executable. |
| if (buffer[3] != 'x') continue; |
| char* start_of_path = index(buffer, '/'); |
| // There may be no filename in this line. Skip to next. |
| if (start_of_path == nullptr) continue; |
| buffer[bytes_read] = 0; |
| result.push_back(SharedLibraryAddress(start_of_path, start, end)); |
| } |
| close(fd); |
| return result; |
| } |
| |
| void OS::SignalCodeMovingGC() {} |
| |
| } // namespace base |
| } // namespace v8 |