1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <stdint.h> 6 #include "src/base/build_config.h" 7 #include "src/base/platform/platform.h" 8 #include "test/cctest/cctest.h" 9 10 #ifdef V8_CC_GNU 11 12 static uintptr_t sp_addr = 0; 13 14 void GetStackPointer(const v8::FunctionCallbackInfo<v8::Value>& args) { 15 #if V8_HOST_ARCH_X64 16 __asm__ __volatile__("mov %%rsp, %0" : "=g"(sp_addr)); 17 #elif V8_HOST_ARCH_IA32 18 __asm__ __volatile__("mov %%esp, %0" : "=g"(sp_addr)); 19 #elif V8_HOST_ARCH_ARM 20 __asm__ __volatile__("str %%sp, %0" : "=g"(sp_addr)); 21 #elif V8_HOST_ARCH_ARM64 22 __asm__ __volatile__("mov x16, sp; str x16, %0" : "=g"(sp_addr)); 23 #elif V8_HOST_ARCH_MIPS 24 __asm__ __volatile__("sw $sp, %0" : "=g"(sp_addr)); 25 #elif V8_HOST_ARCH_MIPS64 26 __asm__ __volatile__("sd $sp, %0" : "=g"(sp_addr)); 27 #elif defined(__PPC64__) || defined(_ARCH_PPC64) 28 __asm__ __volatile__("std 1, %0" : "=g"(sp_addr)); 29 #elif defined(__PPC__) || defined(_ARCH_PPC) 30 __asm__ __volatile__("stw 1, %0" : "=g"(sp_addr)); 31 #else 32 #error Host architecture was not detected as supported by v8 33 #endif 34 35 args.GetReturnValue().Set(v8::Integer::NewFromUnsigned( 36 args.GetIsolate(), static_cast<uint32_t>(sp_addr))); 37 } 38 39 40 TEST(StackAlignment) { 41 v8::Isolate* isolate = CcTest::isolate(); 42 v8::HandleScope handle_scope(isolate); 43 v8::Local<v8::ObjectTemplate> global_template = 44 v8::ObjectTemplate::New(isolate); 45 global_template->Set(v8_str("get_stack_pointer"), 46 v8::FunctionTemplate::New(isolate, GetStackPointer)); 47 48 LocalContext env(NULL, global_template); 49 CompileRun( 50 "function foo() {" 51 " return get_stack_pointer();" 52 "}"); 53 54 v8::Local<v8::Object> global_object = env->Global(); 55 v8::Local<v8::Function> foo = v8::Local<v8::Function>::Cast( 56 global_object->Get(isolate->GetCurrentContext(), v8_str("foo")) 57 .ToLocalChecked()); 58 59 v8::Local<v8::Value> result = 60 foo->Call(isolate->GetCurrentContext(), global_object, 0, NULL) 61 .ToLocalChecked(); 62 CHECK_EQ(0u, result->Uint32Value(isolate->GetCurrentContext()).FromJust() % 63 v8::base::OS::ActivationFrameAlignment()); 64 } 65 66 #endif // V8_CC_GNU 67
