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// Copyright 2013 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 <stdint.h>
#include "src/base/build_config.h"
#include "src/base/platform/platform.h"
#include "test/cctest/cctest.h"
#ifdef V8_CC_GNU
static uintptr_t sp_addr = 0;
void GetStackPointer(const v8::FunctionCallbackInfo<v8::Value>& args) {
#if V8_HOST_ARCH_X64
__asm__ __volatile__("mov %%rsp, %0" : "=g"(sp_addr));
#elif V8_HOST_ARCH_IA32
__asm__ __volatile__("mov %%esp, %0" : "=g"(sp_addr));
#elif V8_HOST_ARCH_ARM
__asm__ __volatile__("str sp, %0" : "=g"(sp_addr));
#elif V8_HOST_ARCH_ARM64
__asm__ __volatile__("mov x16, sp; str x16, %0" : "=g"(sp_addr));
#elif V8_HOST_ARCH_MIPS
__asm__ __volatile__("sw $sp, %0" : "=g"(sp_addr));
#elif V8_HOST_ARCH_MIPS64
__asm__ __volatile__("sd $sp, %0" : "=g"(sp_addr));
#elif defined(__s390x__) || defined(_ARCH_S390X)
__asm__ __volatile__("stg 15, %0" : "=m"(sp_addr));
#elif defined(__s390__) || defined(_ARCH_S390)
__asm__ __volatile__("st 15, %0" : "=m"(sp_addr));
#elif defined(__PPC64__) || defined(_ARCH_PPC64)
__asm__ __volatile__("std 1, %0" : "=g"(sp_addr));
#elif defined(__PPC__) || defined(_ARCH_PPC)
__asm__ __volatile__("stw 1, %0" : "=g"(sp_addr));
#else
#error Host architecture was not detected as supported by v8
#endif
args.GetReturnValue().Set(v8::Integer::NewFromUnsigned(
args.GetIsolate(), static_cast<uint32_t>(sp_addr)));
}
TEST(StackAlignment) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::ObjectTemplate> global_template =
v8::ObjectTemplate::New(isolate);
global_template->Set(v8_str("get_stack_pointer"),
v8::FunctionTemplate::New(isolate, GetStackPointer));
LocalContext env(NULL, global_template);
CompileRun(
"function foo() {"
" return get_stack_pointer();"
"}");
v8::Local<v8::Object> global_object = env->Global();
v8::Local<v8::Function> foo = v8::Local<v8::Function>::Cast(
global_object->Get(isolate->GetCurrentContext(), v8_str("foo"))
.ToLocalChecked());
v8::Local<v8::Value> result =
foo->Call(isolate->GetCurrentContext(), global_object, 0, NULL)
.ToLocalChecked();
CHECK_EQ(0u, result->Uint32Value(isolate->GetCurrentContext()).FromJust() %
v8::base::OS::ActivationFrameAlignment());
}
#endif // V8_CC_GNU
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