adc52af506
This is a reland of4899bcb66dThis is a reland ofb73ee3344aOriginal change's description: > [Memory] Use OS::Allocate for all OS memory allocations. > > - Eliminates OS::ReserveRegion and OS::ReserveAlignedRegion. > - Changes OS::Allocate to take alignment parameter, reorders parameters > to match page_allocator. > - Since the size of memory allocation can be deduced, don't return the > amount of memory allocated. > - Changes reservation of aligned address space. Before we would reserve > (size + alignment) rounded up to page size. This is too much, because > maximum misalignment is (alignment - page_size). > - On Windows and Cygwin, we release an oversize allocation and > immediately retry at the aligned address in the allocation. If we > lose the address due to a race, we just retry. > - Clean up all the calls to OS::Allocate in codegen and tests by adding > helper AllocateSystemPage function (allocation.h) and > AllocateAssemblerBuffer (cctest.h). > - Changes 'assm' to 'masm' in some targets for consistency when using > a macro-assembler. > > - Eliminates OS::ReleaseRegion, replacing with calls to OS::Free. > - Adds bool return value to OS::Free. > - Cleans up types of flags, protection on Windows and Cygwin. > Bug: chromium:756050 > Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng > Change-Id: I306dbe042cc867670fdc935abca29db074b0da71 Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng Change-Id: Iad3c025334e8f8d7d647be99a36a11ee449c9087 Reviewed-on: https://chromium-review.googlesource.com/767014 Commit-Queue: Bill Budge <bbudge@chromium.org> Reviewed-by: Michael Lippautz <mlippautz@chromium.org> Cr-Commit-Position: refs/heads/master@{#49363}
113 lines
4.0 KiB
C++
113 lines
4.0 KiB
C++
// 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
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// 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;
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namespace v8 {
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namespace internal {
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TEST(OSAllocateAndFree) {
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size_t page_size = OS::AllocatePageSize();
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CHECK_NE(0, page_size);
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// A large allocation, aligned at native allocation granularity.
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const size_t kAllocationSize = 1 * MB;
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void* mem_addr = OS::Allocate(OS::GetRandomMmapAddr(), kAllocationSize,
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page_size, OS::MemoryPermission::kReadWrite);
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CHECK_NOT_NULL(mem_addr);
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CHECK(OS::Free(mem_addr, kAllocationSize));
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// A large allocation, aligned significantly beyond native granularity.
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const size_t kBigAlignment = 64 * MB;
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void* aligned_mem_addr =
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OS::Allocate(OS::GetRandomMmapAddr(), kAllocationSize, kBigAlignment,
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OS::MemoryPermission::kReadWrite);
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CHECK_NOT_NULL(aligned_mem_addr);
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CHECK_EQ(aligned_mem_addr, AlignedAddress(aligned_mem_addr, kBigAlignment));
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CHECK(OS::Free(aligned_mem_addr, kAllocationSize));
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}
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TEST(OSReserveMemory) {
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size_t page_size = OS::AllocatePageSize();
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const size_t kAllocationSize = 1 * MB;
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void* mem_addr = OS::Allocate(OS::GetRandomMmapAddr(), kAllocationSize,
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page_size, OS::MemoryPermission::kReadWrite);
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CHECK_NE(0, page_size);
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CHECK_NOT_NULL(mem_addr);
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size_t commit_size = OS::CommitPageSize();
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CHECK(OS::CommitRegion(mem_addr, commit_size, false));
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// Check whether we can write to memory.
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int* addr = static_cast<int*>(mem_addr);
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addr[KB - 1] = 2;
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CHECK(OS::UncommitRegion(mem_addr, commit_size));
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CHECK(OS::Free(mem_addr, kAllocationSize));
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}
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#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) {
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#if V8_HOST_ARCH_X64
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__asm__ __volatile__("mov %%rsp, %0" : "=g"(sp_addr));
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#elif V8_HOST_ARCH_IA32
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__asm__ __volatile__("mov %%esp, %0" : "=g"(sp_addr));
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#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
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__asm__ __volatile__("mov x16, sp; str x16, %0" : "=g"(sp_addr));
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#elif V8_HOST_ARCH_MIPS
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__asm__ __volatile__("sw $sp, %0" : "=g"(sp_addr));
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#elif V8_HOST_ARCH_MIPS64
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__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 15, %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)
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__asm__ __volatile__("std 1, %0" : "=g"(sp_addr));
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#elif defined(__PPC__) || defined(_ARCH_PPC)
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__asm__ __volatile__("stw 1, %0" : "=g"(sp_addr));
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#else
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#error Host architecture was not detected as supported by v8
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#endif
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args.GetReturnValue().Set(v8::Integer::NewFromUnsigned(
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args.GetIsolate(), static_cast<uint32_t>(sp_addr)));
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}
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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(
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"function foo() {"
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" return get_stack_pointer();"
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"}");
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v8::Local<v8::Object> global_object = env->Global();
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v8::Local<v8::Function> foo = v8::Local<v8::Function>::Cast(
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global_object->Get(isolate->GetCurrentContext(), v8_str("foo"))
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.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();
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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
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} // namespace v8
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