2ccca6c5ac
This change provides a quick way to see string contents in postmortem debugging sessions, without digging through a (possibly very large, in the case of ConsString) tree of properties. As well as being convenient for inspecting String objects, this functionality will also be necessary for displaying property names on JSReceiver objects. In order to support custom behaviors for specific classes, this change extends the existing generated debug reader classes with a visitor pattern. Bug: v8:9376 Change-Id: I70eab9ea4e74ca0fab39bf5998d6a602716a4202 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1771939 Reviewed-by: Tobias Tebbi <tebbi@chromium.org> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com> Cr-Commit-Position: refs/heads/master@{#63485}
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
// Copyright 2019 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 "debug-helper-internal.h"
|
|
#include "src/common/ptr-compr-inl.h"
|
|
#include "torque-generated/class-debug-readers-tq.h"
|
|
|
|
namespace i = v8::internal;
|
|
|
|
namespace v8_debug_helper_internal {
|
|
|
|
bool IsPointerCompressed(uintptr_t address) {
|
|
#if COMPRESS_POINTERS_BOOL
|
|
STATIC_ASSERT(i::kPtrComprHeapReservationSize == uintptr_t{1} << 32);
|
|
intptr_t signed_address = static_cast<intptr_t>(address);
|
|
return signed_address >= INT32_MIN && signed_address <= INT32_MAX;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
uintptr_t Decompress(uintptr_t address, uintptr_t any_uncompressed_ptr) {
|
|
if (!COMPRESS_POINTERS_BOOL || !IsPointerCompressed(address)) return address;
|
|
return i::DecompressTaggedAny(any_uncompressed_ptr,
|
|
static_cast<i::Tagged_t>(address));
|
|
}
|
|
|
|
d::PropertyKind GetArrayKind(d::MemoryAccessResult mem_result) {
|
|
d::PropertyKind indexed_field_kind{};
|
|
switch (mem_result) {
|
|
case d::MemoryAccessResult::kOk:
|
|
indexed_field_kind = d::PropertyKind::kArrayOfKnownSize;
|
|
break;
|
|
case d::MemoryAccessResult::kAddressNotValid:
|
|
indexed_field_kind =
|
|
d::PropertyKind::kArrayOfUnknownSizeDueToInvalidMemory;
|
|
break;
|
|
default:
|
|
indexed_field_kind =
|
|
d::PropertyKind::kArrayOfUnknownSizeDueToValidButInaccessibleMemory;
|
|
break;
|
|
}
|
|
return indexed_field_kind;
|
|
}
|
|
|
|
std::vector<std::unique_ptr<ObjectProperty>> TqObject::GetProperties(
|
|
d::MemoryAccessor accessor) const {
|
|
return std::vector<std::unique_ptr<ObjectProperty>>();
|
|
}
|
|
|
|
const char* TqObject::GetName() const { return "v8::internal::Object"; }
|
|
|
|
void TqObject::Visit(TqObjectVisitor* visitor) const {
|
|
visitor->VisitObject(this);
|
|
}
|
|
|
|
} // namespace v8_debug_helper_internal
|