blob: 54b48d6a071392933d182398390e9c6526c08d1f [file] [log] [blame]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "platform/globals.h"
#if defined(TARGET_OS_MACOS)
#include <mach-o/dyld.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include "bin/file.h"
#include "bin/platform.h"
#if !TARGET_OS_IOS
#include <crt_externs.h> // NOLINT
#endif // !TARGET_OS_IOS
#include <signal.h> // NOLINT
#include <string.h> // NOLINT
#include <unistd.h> // NOLINT
#include "bin/fdutils.h"
namespace dart {
namespace bin {
bool Platform::Initialize() {
// Turn off the signal handler for SIGPIPE as it causes the process
// to terminate on writing to a closed pipe. Without the signal
// handler error EPIPE is set instead.
struct sigaction act;
bzero(&act, sizeof(act));
act.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &act, 0) != 0) {
perror("Setting signal handler failed");
return false;
}
return true;
}
int Platform::NumberOfProcessors() {
int32_t cpus = -1;
size_t cpus_length = sizeof(cpus);
if (sysctlbyname("hw.logicalcpu", &cpus, &cpus_length, NULL, 0) == 0) {
return cpus;
} else {
// Failed, fallback to using sysconf.
return sysconf(_SC_NPROCESSORS_ONLN);
}
}
const char* Platform::OperatingSystem() {
return "macos";
}
const char* Platform::LibraryExtension() {
return "dylib";
}
bool Platform::LocalHostname(char *buffer, intptr_t buffer_length) {
return gethostname(buffer, buffer_length) == 0;
}
char** Platform::Environment(intptr_t* count) {
#if TARGET_OS_IOS
// TODO(iposva): On Mac (desktop), _NSGetEnviron() is used to access the
// environ from shared libraries or bundles. This is present in crt_externs.h
// which is unavailable on iOS. On iOS, everything is statically linked for
// now. So arguably, accessing the environ directly with a "extern char
// **environ" will work. But this approach is brittle as the target with this
// CU could be a dynamic framework (introduced in iOS 8). A more elegant
// approach needs to be devised.
return NULL;
#else
// Using environ directly is only safe as long as we do not
// provide access to modifying environment variables.
// On MacOS you have to do a bit of magic to get to the
// environment strings.
char** environ = *(_NSGetEnviron());
intptr_t i = 0;
char** tmp = environ;
while (*(tmp++) != NULL) i++;
*count = i;
char** result = new char*[i];
for (intptr_t current = 0; current < i; current++) {
result[current] = environ[current];
}
return result;
#endif
}
void Platform::FreeEnvironment(char** env, intptr_t count) {
delete[] env;
}
char* Platform::ResolveExecutablePath() {
// Get the required length of the buffer.
uint32_t path_size = 0;
char* path = NULL;
if (_NSGetExecutablePath(path, &path_size) == 0) {
return NULL;
}
// Allocate buffer and get executable path.
path = reinterpret_cast<char*>(malloc(path_size));
if (_NSGetExecutablePath(path, &path_size) != 0) {
free(path);
return NULL;
}
// Return the canonical path as the returned path might contain symlinks.
char* canon_path = File::GetCanonicalPath(path);
free(path);
return canon_path;
}
} // namespace bin
} // namespace dart
#endif // defined(TARGET_OS_MACOS)