test-platform.cc 2.52 KB
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// Copyright 2013 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
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#include <stdint.h>
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#include "src/base/build_config.h"
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#include "src/base/platform/platform.h"
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#include "test/cctest/cctest.h"
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using OS = v8::base::OS;

namespace v8 {
namespace internal {

#ifdef V8_CC_GNU
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static uintptr_t sp_addr = 0;
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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
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  __asm__ __volatile__("str sp, %0" : "=g"(sp_addr));
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#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));
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#elif V8_HOST_ARCH_MIPS64
  __asm__ __volatile__("sd $sp, %0" : "=g"(sp_addr));
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#elif defined(__s390x__) || defined(_ARCH_S390X)
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  __asm__ __volatile__("stg %%r15, %0" : "=m"(sp_addr));
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#elif defined(__s390__) || defined(_ARCH_S390)
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  __asm__ __volatile__("st 15, %0" : "=m"(sp_addr));
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#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));
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#else
#error Host architecture was not detected as supported by v8
#endif

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  args.GetReturnValue().Set(v8::Integer::NewFromUnsigned(
      args.GetIsolate(), static_cast<uint32_t>(sp_addr)));
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}

TEST(StackAlignment) {
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  v8::Isolate* isolate = CcTest::isolate();
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  v8::HandleScope handle_scope(isolate);
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  v8::Local<v8::ObjectTemplate> global_template =
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      v8::ObjectTemplate::New(isolate);
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  global_template->Set(v8_str("get_stack_pointer"),
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                       v8::FunctionTemplate::New(isolate, GetStackPointer));
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  LocalContext env(nullptr, global_template);
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  CompileRun(
      "function foo() {"
      "  return get_stack_pointer();"
      "}");

  v8::Local<v8::Object> global_object = env->Global();
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  v8::Local<v8::Function> foo = v8::Local<v8::Function>::Cast(
      global_object->Get(isolate->GetCurrentContext(), v8_str("foo"))
          .ToLocalChecked());
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  v8::Local<v8::Value> result =
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      foo->Call(isolate->GetCurrentContext(), global_object, 0, nullptr)
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          .ToLocalChecked();
  CHECK_EQ(0u, result->Uint32Value(isolate->GetCurrentContext()).FromJust() %
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                   OS::ActivationFrameAlignment());
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}
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#endif  // V8_CC_GNU
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}  // namespace internal
}  // namespace v8