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
GetStackPointer(const v8::FunctionCallbackInfo<v8::Value> & args)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
TEST(StackAlignment)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