blob: a34db672cac251e7f90f5d977ebf28bd8197e6e4 [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 "bin/builtin.h"
#include "platform/atomic.h"
#include "platform/globals.h"
#include "platform/utils.h"
#if defined(DART_HOST_OS_MACOS)
#include "bin/platform_macos.h"
#endif // defined(DART_HOST_OS_MACOS)
namespace dart {
namespace bin {
class Platform {
// Perform platform specific initialization.
static bool Initialize();
// Returns the number of processors on the machine.
static int NumberOfProcessors();
// Returns a string representing the operating system ("linux",
// "macos", "windows", or "android"). The returned string should not be
// deallocated by the caller.
static const char* OperatingSystem();
// Returns a string representing the version of the operating system. The
// format of the string is determined by the platform. The returned string
// should not be deallocated by the caller.
static const char* OperatingSystemVersion();
// Returns the architecture name of the processor the VM is running on
// (ia32, x64, arm, or arm64).
static const char* HostArchitecture() {
#if defined(HOST_ARCH_ARM)
return "arm";
#elif defined(HOST_ARCH_ARM64)
return "arm64";
#elif defined(HOST_ARCH_IA32)
return "ia32";
#elif defined(HOST_ARCH_X64)
return "x64";
#error Architecture detection failed.
static const char* LibraryPrefix();
// Returns a string representing the operating system's shared library
// extension (e.g. 'so', 'dll', ...). The returned string should not be
// deallocated by the caller.
static const char* LibraryExtension();
// Extracts the local hostname.
static bool LocalHostname(char* buffer, intptr_t buffer_length);
static const char* LocaleName();
// Extracts the environment variables for the current process. The array of
// strings is Dart_ScopeAllocated. The number of elements in the array is
// returned in the count argument.
static char** Environment(intptr_t* count);
static const char* ResolveExecutablePath();
// This has the same effect as calling ResolveExecutablePath except that
// Dart_ScopeAllocate is not called and that the result goes into the given
// parameters.
// WARNING: On Fuchsia it returns -1, i.e. doesn't work.
// Note that `result` should be pre-allocated with size `result_size`.
// The return-value is the length read into `result` or -1 on failure.
static intptr_t ResolveExecutablePathInto(char* result, size_t result_size);
// Stores the executable name.
static void SetExecutableName(const char* executable_name) {
executable_name_ = executable_name;
static const char* GetExecutableName();
static const char* GetResolvedExecutableName() {
if (resolved_executable_name_.load() == nullptr) {
// Try to resolve the executable path using platform specific APIs.
const char* resolved_name = Platform::ResolveExecutablePath();
if (resolved_name != nullptr) {
char* resolved_name_copy = Utils::StrDup(resolved_name);
const char* expect_old_is_null = nullptr;
if (!resolved_executable_name_.compare_exchange_strong(
expect_old_is_null, resolved_name_copy)) {
return resolved_executable_name_.load();
// Stores and gets the flags passed to the executable.
static void SetExecutableArguments(int script_index, char** argv) {
script_index_ = script_index;
argv_ = argv;
static int GetScriptIndex() { return script_index_; }
static char** GetArgv() { return argv_; }
DART_NORETURN static void Exit(int exit_code);
static void SetCoreDumpResourceLimit(int value);
// The path to the executable.
static const char* executable_name_;
// The path to the resolved executable.
// We use require-release semantics to ensure initializing stores to the
// string are visible when the string becomes visible.
static AcqRelAtomic<const char*> resolved_executable_name_;
static int script_index_;
static char** argv_; // VM flags are argv_[1 ... script_index_ - 1]
} // namespace bin
} // namespace dart