// 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" using OS = v8::base::OS; namespace v8 { namespace internal { #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 %%r15, %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(nullptr, 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, nullptr) .ToLocalChecked(); CHECK_EQ(0u, result->Uint32Value(isolate->GetCurrentContext()).FromJust() % OS::ActivationFrameAlignment()); } #endif // V8_CC_GNU } // namespace internal } // namespace v8