// Copyright 2019 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.
#include "src/extensions/cputracemark-extension.h"
namespace v8 {
namespace internal {
v8::Local<v8::FunctionTemplate>
CpuTraceMarkExtension::GetNativeFunctionTemplate(v8::Isolate* isolate,
v8::Local<v8::String> str) {
return v8::FunctionTemplate::New(isolate, CpuTraceMarkExtension::Mark);
}
void CpuTraceMarkExtension::Mark(
const v8::FunctionCallbackInfo<v8::Value>& args) {
if (args.Length() < 1 || !args[0]->IsUint32()) {
args.GetIsolate()->ThrowError(
"First parameter to cputracemark() must be a unsigned int32.");
return;
}
#if V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64
#if defined(__clang__)
// for non msvc build
uint32_t param =
args[0]->Uint32Value(args.GetIsolate()->GetCurrentContext()).ToChecked();
int magic_dummy;
#if defined(__i386__) && defined(__pic__)
__asm__ __volatile__("push %%ebx; cpuid; pop %%ebx"
: "=a"(magic_dummy)
: "a"(0x4711 | (param << 16))
: "ecx", "edx");
#else
__asm__ __volatile__("cpuid"
: "=a"(magic_dummy)
: "a"(0x4711 | (param << 16))
: "ecx", "edx", "ebx");
#endif // defined(__i386__) && defined(__pic__)
#else
// no msvc build support yet.
#endif //! V8_LIBC_MSVCRT
#endif // V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64
}
} // namespace internal
} // namespace v8