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// Copyright 2012 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 FreeBSD goes here. For the POSIX-compatible
// parts, the implementation is in platform-posix.cc.
#include <pthread.h>
#include <pthread_np.h>
#include <semaphore.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/ucontext.h>
#include <sys/user.h>
#include <sys/fcntl.h> // open
#include <sys/mman.h> // mmap & munmap
#include <sys/stat.h> // open
#include <sys/sysctl.h>
#include <unistd.h> // getpagesize
// If you don't have execinfo.h then you need devel/libexecinfo from ports.
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <strings.h> // index
#include <cmath>
#undef MAP_TYPE
#include "src/base/macros.h"
#include "src/base/platform/platform-posix-time.h"
#include "src/base/platform/platform-posix.h"
#include "src/base/platform/platform.h"
namespace v8 {
namespace base {
TimezoneCache* OS::CreateTimezoneCache() {
return new PosixDefaultTimezoneCache();
}
static unsigned StringToLong(char* buffer) {
return static_cast<unsigned>(strtol(buffer, nullptr, 16)); // NOLINT
}
std::vector<OS::SharedLibraryAddress> OS::GetSharedLibraryAddresses() {
std::vector<SharedLibraryAddress> result;
int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid()};
size_t miblen = sizeof(mib) / sizeof(mib[0]);
size_t buffer_size;
if (sysctl(mib, miblen, nullptr, &buffer_size, nullptr, 0) == 0) {
// Overallocate the buffer by 1/3 to account for concurrent
// kinfo_vmentry change. 1/3 is an arbitrary constant that
// works in practice.
buffer_size = buffer_size * 4 / 3;
std::vector<char> buffer(buffer_size);
int ret = sysctl(mib, miblen, buffer.data(), &buffer_size, nullptr, 0);
if (ret == 0 || (ret == -1 && errno == ENOMEM)) {
char* start = buffer.data();
char* end = start + buffer_size;
while (start < end) {
struct kinfo_vmentry* map =
reinterpret_cast<struct kinfo_vmentry*>(start);
const size_t ssize = map->kve_structsize;
char* path = map->kve_path;
CHECK_NE(0, ssize);
if ((map->kve_protection & KVME_PROT_READ) != 0 &&
(map->kve_protection & KVME_PROT_EXEC) != 0 && path[0] != '\0') {
char* sep = strrchr(path, '/');
std::string lib_name;
if (sep != nullptr) {
lib_name = std::string(++sep);
} else {
lib_name = std::string(path);
}
result.push_back(SharedLibraryAddress(
lib_name, reinterpret_cast<uintptr_t>(map->kve_start),
reinterpret_cast<uintptr_t>(map->kve_end)));
}
start += ssize;
}
}
}
return result;
}
void OS::SignalCodeMovingGC() {}
void OS::AdjustSchedulingParams() {}
// static
Stack::StackSlot Stack::GetStackStart() {
pthread_attr_t attr;
int error;
pthread_attr_init(&attr);
error = pthread_attr_get_np(pthread_self(), &attr);
if (!error) {
void* base;
size_t size;
error = pthread_attr_getstack(&attr, &base, &size);
CHECK(!error);
pthread_attr_destroy(&attr);
return reinterpret_cast<uint8_t*>(base) + size;
}
pthread_attr_destroy(&attr);
return nullptr;
}
} // namespace base
} // namespace v8
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