#include "config.h"
#include "StackFrame.h"
#include "CodeBlock.h"
#include "DebuggerPrimitives.h"
#include "JSCInlines.h"
#include <wtf/text/StringBuilder.h>
namespace JSC {
StackFrame::StackFrame(VM& vm, JSCell* owner, JSCell* callee)
: m_callee(vm, owner, callee)
{
}
StackFrame::StackFrame(VM& vm, JSCell* owner, JSCell* callee, CodeBlock* codeBlock, unsigned bytecodeOffset)
: m_callee(vm, owner, callee)
, m_codeBlock(vm, owner, codeBlock)
, m_bytecodeOffset(bytecodeOffset)
{
}
StackFrame::StackFrame(Wasm::IndexOrName indexOrName)
: m_wasmFunctionIndexOrName(indexOrName)
, m_isWasmFrame(true)
{
}
intptr_t StackFrame::sourceID() const
{
if (!m_codeBlock)
return noSourceID;
return m_codeBlock->ownerScriptExecutable()->sourceID();
}
String StackFrame::sourceURL() const
{
if (m_isWasmFrame)
return "[wasm code]"_s;
if (!m_codeBlock) {
return "[native code]"_s;
}
String sourceURL = m_codeBlock->ownerScriptExecutable()->sourceURL();
if (!sourceURL.isNull())
return sourceURL;
return emptyString();
}
String StackFrame::functionName(VM& vm) const
{
if (m_isWasmFrame)
return makeString(m_wasmFunctionIndexOrName);
if (m_codeBlock) {
switch (m_codeBlock->codeType()) {
case EvalCode:
return "eval code"_s;
case ModuleCode:
return "module code"_s;
case FunctionCode:
break;
case GlobalCode:
return "global code"_s;
default:
ASSERT_NOT_REACHED();
}
}
String name;
if (m_callee) {
if (m_callee->isObject())
name = getCalculatedDisplayName(vm, jsCast<JSObject*>(m_callee.get())).impl();
}
return name.isNull() ? emptyString() : name;
}
void StackFrame::computeLineAndColumn(unsigned& line, unsigned& column) const
{
if (!m_codeBlock) {
line = 0;
column = 0;
return;
}
int divot = 0;
int unusedStartOffset = 0;
int unusedEndOffset = 0;
m_codeBlock->expressionRangeForBytecodeOffset(m_bytecodeOffset, divot, unusedStartOffset, unusedEndOffset, line, column);
ScriptExecutable* executable = m_codeBlock->ownerScriptExecutable();
if (executable->hasOverrideLineNumber())
line = executable->overrideLineNumber();
}
String StackFrame::toString(VM& vm) const
{
StringBuilder traceBuild;
String functionName = this->functionName(vm);
String sourceURL = this->sourceURL();
traceBuild.append(functionName);
if (!sourceURL.isEmpty()) {
if (!functionName.isEmpty())
traceBuild.append('@');
traceBuild.append(sourceURL);
if (hasLineAndColumnInfo()) {
unsigned line;
unsigned column;
computeLineAndColumn(line, column);
traceBuild.append(':');
traceBuild.appendNumber(line);
traceBuild.append(':');
traceBuild.appendNumber(column);
}
}
return traceBuild.toString().impl();
}
void StackFrame::visitChildren(SlotVisitor& visitor)
{
if (m_callee)
visitor.append(m_callee);
if (m_codeBlock)
visitor.append(m_codeBlock);
}
}