koda@google.com
554f25b53c
We assume that addresses of stack resources refer to the actual stack and are ordered accordingly. Using the AddressSanitizer with detect_stack_use_after_return will break this assumption. R=zra@google.com Review URL: https://codereview.chromium.org//927363004 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@43858 260f80e4-7a28-3924-810f-c04153c831b5
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/allocation.h"
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#include "platform/assert.h"
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#include "vm/isolate.h"
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#include "vm/zone.h"
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namespace dart {
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static void* Allocate(uword size, Zone* zone) {
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ASSERT(zone != NULL);
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if (size > static_cast<uword>(kIntptrMax)) {
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FATAL1("ZoneAllocated object has unexpectedly large size %" Pu "", size);
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}
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return reinterpret_cast<void*>(zone->AllocUnsafe(size));
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}
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void* ZoneAllocated::operator new(uword size) {
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return Allocate(size, Isolate::Current()->current_zone());
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}
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void* ZoneAllocated::operator new(uword size, BaseIsolate* isolate) {
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ASSERT(isolate != NULL);
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return Allocate(size, isolate->current_zone());
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}
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void* ZoneAllocated::operator new(uword size, Zone* zone) {
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ASSERT(zone == Isolate::Current()->current_zone());
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return Allocate(size, zone);
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}
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void StackResource::Unwind(Isolate* isolate, uword stack_pointer) {
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while (isolate->top_resource() != NULL &&
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(reinterpret_cast<uword>(isolate->top_resource()) < stack_pointer)) {
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isolate->top_resource()->~StackResource();
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}
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#if defined(DEBUG)
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// All remaining stack resources should be below stack_pointer.
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StackResource* current = isolate->top_resource();
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while (current != NULL) {
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ASSERT(reinterpret_cast<uword>(current) >= stack_pointer);
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current = current->previous_;
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}
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#endif // DEBUG
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}
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void StackResource::Unwind(Isolate* isolate, StackResource* new_top) {
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StackResource* current_resource = isolate->top_resource();
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while (current_resource != new_top) {
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current_resource->~StackResource();
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current_resource = isolate->top_resource();
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}
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}
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} // namespace dart
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