Revert of [inspector] Initial import of v8_inspector.

src/inspector/V8StackTraceImpl.cpp

-// Copyright 2016 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 "src/inspector/V8StackTraceImpl.h"
-
-#include "src/inspector/StringUtil.h"
-#include "src/inspector/V8Debugger.h"
-#include "src/inspector/protocol/Protocol.h"
-
-#include <v8-debug.h>
-#include <v8-profiler.h>
-#include <v8-version.h>
-
-namespace v8_inspector {
-
-namespace {
-
-static const v8::StackTrace::StackTraceOptions stackTraceOptions = static_cast<v8::StackTrace::StackTraceOptions>(
-    v8::StackTrace::kLineNumber |
-    v8::StackTrace::kColumnOffset |
-    v8::StackTrace::kScriptId |
-    v8::StackTrace::kScriptNameOrSourceURL |
-    v8::StackTrace::kFunctionName);
-
-V8StackTraceImpl::Frame toFrame(v8::Local<v8::StackFrame> frame)
-{
-    String16 scriptId = String16::fromInteger(frame->GetScriptId());
-    String16 sourceName;
-    v8::Local<v8::String> sourceNameValue(frame->GetScriptNameOrSourceURL());
-    if (!sourceNameValue.IsEmpty())
-        sourceName = toProtocolString(sourceNameValue);
-
-    String16 functionName;
-    v8::Local<v8::String> functionNameValue(frame->GetFunctionName());
-    if (!functionNameValue.IsEmpty())
-        functionName = toProtocolString(functionNameValue);
-
-    int sourceLineNumber = frame->GetLineNumber();
-    int sourceColumn = frame->GetColumn();
-    return V8StackTraceImpl::Frame(functionName, scriptId, sourceName, sourceLineNumber, sourceColumn);
-}
-
-void toFramesVector(v8::Local<v8::StackTrace> stackTrace, std::vector<V8StackTraceImpl::Frame>& frames, size_t maxStackSize, v8::Isolate* isolate)
-{
-    DCHECK(isolate->InContext());
-    int frameCount = stackTrace->GetFrameCount();
-    if (frameCount > static_cast<int>(maxStackSize))
-        frameCount = maxStackSize;
-    for (int i = 0; i < frameCount; i++) {
-        v8::Local<v8::StackFrame> stackFrame = stackTrace->GetFrame(i);
-        frames.push_back(toFrame(stackFrame));
-    }
-}
-
-} //  namespace
-
-V8StackTraceImpl::Frame::Frame()
-    : m_functionName("undefined")
-    , m_scriptId("")
-    , m_scriptName("undefined")
-    , m_lineNumber(0)
-    , m_columnNumber(0)
-{
-}
-
-V8StackTraceImpl::Frame::Frame(const String16& functionName, const String16& scriptId, const String16& scriptName, int lineNumber, int column)
-    : m_functionName(functionName)
-    , m_scriptId(scriptId)
-    , m_scriptName(scriptName)
-    , m_lineNumber(lineNumber)
-    , m_columnNumber(column)
-{
-    DCHECK(m_lineNumber != v8::Message::kNoLineNumberInfo);
-    DCHECK(m_columnNumber != v8::Message::kNoColumnInfo);
-}
-
-V8StackTraceImpl::Frame::~Frame()
-{
-}
-
-// buildInspectorObject() and SourceLocation's toTracedValue() should set the same fields.
-// If either of them is modified, the other should be also modified.
-std::unique_ptr<protocol::Runtime::CallFrame> V8StackTraceImpl::Frame::buildInspectorObject() const
-{
-    return protocol::Runtime::CallFrame::create()
-        .setFunctionName(m_functionName)
-        .setScriptId(m_scriptId)
-        .setUrl(m_scriptName)
-        .setLineNumber(m_lineNumber - 1)
-        .setColumnNumber(m_columnNumber - 1)
-        .build();
-}
-
-V8StackTraceImpl::Frame V8StackTraceImpl::Frame::clone() const
-{
-    return Frame(m_functionName, m_scriptId, m_scriptName, m_lineNumber, m_columnNumber);
-}
-
-// static
-void V8StackTraceImpl::setCaptureStackTraceForUncaughtExceptions(v8::Isolate* isolate, bool capture)
-{
-    isolate->SetCaptureStackTraceForUncaughtExceptions(capture, V8StackTraceImpl::maxCallStackSizeToCapture, stackTraceOptions);
-}
-
-// static
-std::unique_ptr<V8StackTraceImpl> V8StackTraceImpl::create(V8Debugger* debugger, int contextGroupId, v8::Local<v8::StackTrace> stackTrace, size_t maxStackSize, const String16& description)
-{
-    v8::Isolate* isolate = v8::Isolate::GetCurrent();
-    v8::HandleScope scope(isolate);
-    std::vector<V8StackTraceImpl::Frame> frames;
-    if (!stackTrace.IsEmpty())
-        toFramesVector(stackTrace, frames, maxStackSize, isolate);
-
-    int maxAsyncCallChainDepth = 1;
-    V8StackTraceImpl* asyncCallChain = nullptr;
-    if (debugger && maxStackSize > 1) {
-        asyncCallChain = debugger->currentAsyncCallChain();
-        maxAsyncCallChainDepth = debugger->maxAsyncCallChainDepth();
-    }
-    // Do not accidentally append async call chain from another group. This should not
-    // happen if we have proper instrumentation, but let's double-check to be safe.
-    if (contextGroupId && asyncCallChain && asyncCallChain->m_contextGroupId && asyncCallChain->m_contextGroupId != contextGroupId) {
-        asyncCallChain = nullptr;
-        maxAsyncCallChainDepth = 1;
-    }
-
-    // Only the top stack in the chain may be empty, so ensure that second stack is non-empty (it's the top of appended chain).
-    if (asyncCallChain && asyncCallChain->isEmpty())
-        asyncCallChain = asyncCallChain->m_parent.get();
-
-    if (stackTrace.IsEmpty() && !asyncCallChain)
-        return nullptr;
-
-    std::unique_ptr<V8StackTraceImpl> result(new V8StackTraceImpl(contextGroupId, description, frames, asyncCallChain ? asyncCallChain->cloneImpl() : nullptr));
-
-    // Crop to not exceed maxAsyncCallChainDepth.
-    V8StackTraceImpl* deepest = result.get();
-    while (deepest && maxAsyncCallChainDepth) {
-        deepest = deepest->m_parent.get();
-        maxAsyncCallChainDepth--;
-    }
-    if (deepest)
-        deepest->m_parent.reset();
-
-    return result;
-}
-
-std::unique_ptr<V8StackTraceImpl> V8StackTraceImpl::capture(V8Debugger* debugger, int contextGroupId, size_t maxStackSize, const String16& description)
-{
-    v8::Isolate* isolate = v8::Isolate::GetCurrent();
-    v8::HandleScope handleScope(isolate);
-    v8::Local<v8::StackTrace> stackTrace;
-    if (isolate->InContext()) {
-#if V8_MAJOR_VERSION >= 5
-        isolate->GetCpuProfiler()->CollectSample();
-#endif
-        stackTrace = v8::StackTrace::CurrentStackTrace(isolate, maxStackSize, stackTraceOptions);
-    }
-    return V8StackTraceImpl::create(debugger, contextGroupId, stackTrace, maxStackSize, description);
-}
-
-std::unique_ptr<V8StackTraceImpl> V8StackTraceImpl::cloneImpl()
-{
-    std::vector<Frame> framesCopy(m_frames);
-    return wrapUnique(new V8StackTraceImpl(m_contextGroupId, m_description, framesCopy, m_parent ? m_parent->cloneImpl() : nullptr));
-}
-
-std::unique_ptr<V8StackTrace> V8StackTraceImpl::clone()
-{
-    std::vector<Frame> frames;
-    for (size_t i = 0; i < m_frames.size(); i++)
-        frames.push_back(m_frames.at(i).clone());
-    return wrapUnique(new V8StackTraceImpl(m_contextGroupId, m_description, frames, nullptr));
-}
-
-V8StackTraceImpl::V8StackTraceImpl(int contextGroupId, const String16& description, std::vector<Frame>& frames, std::unique_ptr<V8StackTraceImpl> parent)
-    : m_contextGroupId(contextGroupId)
-    , m_description(description)
-    , m_parent(std::move(parent))
-{
-    m_frames.swap(frames);
-}
-
-V8StackTraceImpl::~V8StackTraceImpl()
-{
-}
-
-StringView V8StackTraceImpl::topSourceURL() const
-{
-    DCHECK(m_frames.size());
-    return toStringView(m_frames[0].m_scriptName);
-}
-
-int V8StackTraceImpl::topLineNumber() const
-{
-    DCHECK(m_frames.size());
-    return m_frames[0].m_lineNumber;
-}
-
-int V8StackTraceImpl::topColumnNumber() const
-{
-    DCHECK(m_frames.size());
-    return m_frames[0].m_columnNumber;
-}
-
-StringView V8StackTraceImpl::topFunctionName() const
-{
-    DCHECK(m_frames.size());
-    return toStringView(m_frames[0].m_functionName);
-}
-
-StringView V8StackTraceImpl::topScriptId() const
-{
-    DCHECK(m_frames.size());
-    return toStringView(m_frames[0].m_scriptId);
-}
-
-std::unique_ptr<protocol::Runtime::StackTrace> V8StackTraceImpl::buildInspectorObjectImpl() const
-{
-    std::unique_ptr<protocol::Array<protocol::Runtime::CallFrame>> frames = protocol::Array<protocol::Runtime::CallFrame>::create();
-    for (size_t i = 0; i < m_frames.size(); i++)
-        frames->addItem(m_frames.at(i).buildInspectorObject());
-
-    std::unique_ptr<protocol::Runtime::StackTrace> stackTrace = protocol::Runtime::StackTrace::create()
-        .setCallFrames(std::move(frames)).build();
-    if (!m_description.isEmpty())
-        stackTrace->setDescription(m_description);
-    if (m_parent)
-        stackTrace->setParent(m_parent->buildInspectorObjectImpl());
-    return stackTrace;
-}
-
-std::unique_ptr<protocol::Runtime::StackTrace> V8StackTraceImpl::buildInspectorObjectForTail(V8Debugger* debugger) const
-{
-    v8::HandleScope handleScope(v8::Isolate::GetCurrent());
-    // Next call collapses possible empty stack and ensures maxAsyncCallChainDepth.
-    std::unique_ptr<V8StackTraceImpl> fullChain = V8StackTraceImpl::create(debugger, m_contextGroupId, v8::Local<v8::StackTrace>(), V8StackTraceImpl::maxCallStackSizeToCapture);
-    if (!fullChain || !fullChain->m_parent)
-        return nullptr;
-    return fullChain->m_parent->buildInspectorObjectImpl();
-}
-
-std::unique_ptr<protocol::Runtime::API::StackTrace> V8StackTraceImpl::buildInspectorObject() const
-{
-    return buildInspectorObjectImpl();
-}
-
-std::unique_ptr<StringBuffer> V8StackTraceImpl::toString() const
-{
-    String16Builder stackTrace;
-    for (size_t i = 0; i < m_frames.size(); ++i) {
-        const Frame& frame = m_frames[i];
-        stackTrace.append("\n    at " + (frame.functionName().length() ? frame.functionName() : "(anonymous function)"));
-        stackTrace.append(" (");
-        stackTrace.append(frame.sourceURL());
-        stackTrace.append(':');
-        stackTrace.append(String16::fromInteger(frame.lineNumber()));
-        stackTrace.append(':');
-        stackTrace.append(String16::fromInteger(frame.columnNumber()));
-        stackTrace.append(')');
-    }
-    String16 string = stackTrace.toString();
-    return StringBufferImpl::adopt(string);
-}
-
-} // namespace v8_inspector