https://github.com/mozilla/gecko-dev
Tip revision: 9f494356f3c8bf847e36d378e39430c856859e46 authored by Aki Sasaki on 28 April 2014, 19:15:19 UTC
tagging B2G_1_1 for mergeday. r=a=mergeday DONTBUILD
tagging B2G_1_1 for mergeday. r=a=mergeday DONTBUILD
Tip revision: 9f49435
XPCStack.cpp
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* Implements nsIStackFrame. */
#include "xpcprivate.h"
class XPCJSStackFrame : public nsIStackFrame
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSISTACKFRAME
static nsresult CreateStack(JSContext* cx, XPCJSStackFrame** stack);
static nsresult CreateStackFrameLocation(uint32_t aLanguage,
const char* aFilename,
const char* aFunctionName,
int32_t aLineNumber,
nsIStackFrame* aCaller,
XPCJSStackFrame** stack);
XPCJSStackFrame();
virtual ~XPCJSStackFrame();
JSBool IsJSFrame() const
{return mLanguage == nsIProgrammingLanguage::JAVASCRIPT;}
private:
nsCOMPtr<nsIStackFrame> mCaller;
char* mFilename;
char* mFunname;
int32_t mLineno;
uint32_t mLanguage;
};
/**********************************************/
// static
nsresult
XPCJSStack::CreateStack(JSContext* cx, nsIStackFrame** stack)
{
if (!cx)
return NS_ERROR_FAILURE;
return XPCJSStackFrame::CreateStack(cx, (XPCJSStackFrame**) stack);
}
// static
nsresult
XPCJSStack::CreateStackFrameLocation(uint32_t aLanguage,
const char* aFilename,
const char* aFunctionName,
int32_t aLineNumber,
nsIStackFrame* aCaller,
nsIStackFrame** stack)
{
return XPCJSStackFrame::CreateStackFrameLocation(aLanguage,
aFilename,
aFunctionName,
aLineNumber,
aCaller,
(XPCJSStackFrame**) stack);
}
/**********************************************/
XPCJSStackFrame::XPCJSStackFrame()
: mFilename(nullptr),
mFunname(nullptr),
mLineno(0),
mLanguage(nsIProgrammingLanguage::UNKNOWN)
{
}
XPCJSStackFrame::~XPCJSStackFrame()
{
if (mFilename)
nsMemory::Free(mFilename);
if (mFunname)
nsMemory::Free(mFunname);
}
NS_IMPL_THREADSAFE_ISUPPORTS1(XPCJSStackFrame, nsIStackFrame)
nsresult
XPCJSStackFrame::CreateStack(JSContext* cx, XPCJSStackFrame** stack)
{
static const unsigned MAX_FRAMES = 100;
nsRefPtr<XPCJSStackFrame> first = new XPCJSStackFrame();
nsRefPtr<XPCJSStackFrame> self = first;
JS::StackDescription* desc = JS::DescribeStack(cx, MAX_FRAMES);
if (!desc)
return NS_ERROR_FAILURE;
for (size_t i = 0; i < desc->nframes && self; i++) {
self->mLanguage = nsIProgrammingLanguage::JAVASCRIPT;
JSAutoCompartment ac(cx, desc->frames[i].script);
const char* filename = JS_GetScriptFilename(cx, desc->frames[i].script);
if (filename) {
self->mFilename = (char*)
nsMemory::Clone(filename,
sizeof(char)*(strlen(filename)+1));
}
self->mLineno = desc->frames[i].lineno;
JSFunction* fun = desc->frames[i].fun;
if (fun) {
JSString *funid = JS_GetFunctionId(fun);
if (funid) {
size_t length = JS_GetStringEncodingLength(cx, funid);
if (length != size_t(-1)) {
self->mFunname = static_cast<char *>(nsMemory::Alloc(length + 1));
if (self->mFunname) {
JS_EncodeStringToBuffer(funid, self->mFunname, length);
self->mFunname[length] = '\0';
}
}
}
}
XPCJSStackFrame* frame = new XPCJSStackFrame();
self->mCaller = frame;
self = frame;
}
JS::FreeStackDescription(cx, desc);
*stack = first.forget().get();
return NS_OK;
}
// static
nsresult
XPCJSStackFrame::CreateStackFrameLocation(uint32_t aLanguage,
const char* aFilename,
const char* aFunctionName,
int32_t aLineNumber,
nsIStackFrame* aCaller,
XPCJSStackFrame** stack)
{
JSBool failed = false;
XPCJSStackFrame* self = new XPCJSStackFrame();
if (self)
NS_ADDREF(self);
else
failed = true;
if (!failed) {
self->mLanguage = aLanguage;
self->mLineno = aLineNumber;
}
if (!failed && aFilename) {
self->mFilename = (char*)
nsMemory::Clone(aFilename,
sizeof(char)*(strlen(aFilename)+1));
if (!self->mFilename)
failed = true;
}
if (!failed && aFunctionName) {
self->mFunname = (char*)
nsMemory::Clone(aFunctionName,
sizeof(char)*(strlen(aFunctionName)+1));
if (!self->mFunname)
failed = true;
}
if (!failed && aCaller) {
self->mCaller = aCaller;
}
if (failed && self) {
NS_RELEASE(self); // sets self to nullptr
}
*stack = self;
return self ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
/* readonly attribute uint32_t language; */
NS_IMETHODIMP XPCJSStackFrame::GetLanguage(uint32_t *aLanguage)
{
*aLanguage = mLanguage;
return NS_OK;
}
/* readonly attribute string languageName; */
NS_IMETHODIMP XPCJSStackFrame::GetLanguageName(char * *aLanguageName)
{
static const char js[] = "JavaScript";
static const char cpp[] = "C++";
char* temp;
if (IsJSFrame())
*aLanguageName = temp = (char*) nsMemory::Clone(js, sizeof(js));
else
*aLanguageName = temp = (char*) nsMemory::Clone(cpp, sizeof(cpp));
return temp ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
/* readonly attribute string filename; */
NS_IMETHODIMP XPCJSStackFrame::GetFilename(char * *aFilename)
{
XPC_STRING_GETTER_BODY(aFilename, mFilename);
}
/* readonly attribute string name; */
NS_IMETHODIMP XPCJSStackFrame::GetName(char * *aFunction)
{
XPC_STRING_GETTER_BODY(aFunction, mFunname);
}
/* readonly attribute int32_t lineNumber; */
NS_IMETHODIMP XPCJSStackFrame::GetLineNumber(int32_t *aLineNumber)
{
*aLineNumber = mLineno;
return NS_OK;
}
/* readonly attribute string sourceLine; */
NS_IMETHODIMP XPCJSStackFrame::GetSourceLine(char * *aSourceLine)
{
*aSourceLine = nullptr;
return NS_OK;
}
/* readonly attribute nsIStackFrame caller; */
NS_IMETHODIMP XPCJSStackFrame::GetCaller(nsIStackFrame * *aCaller)
{
NS_IF_ADDREF(*aCaller = mCaller);
return NS_OK;
}
/* string toString (); */
NS_IMETHODIMP XPCJSStackFrame::ToString(char **_retval)
{
const char* frametype = IsJSFrame() ? "JS" : "native";
const char* filename = mFilename ? mFilename : "<unknown filename>";
const char* funname = mFunname ? mFunname : "<TOP_LEVEL>";
static const char format[] = "%s frame :: %s :: %s :: line %d";
int len = sizeof(char)*
(strlen(frametype) + strlen(filename) + strlen(funname)) +
sizeof(format) + 6 /* space for lineno */;
char* buf = (char*) nsMemory::Alloc(len);
if (!buf)
return NS_ERROR_OUT_OF_MEMORY;
JS_snprintf(buf, len, format, frametype, filename, funname, mLineno);
*_retval = buf;
return NS_OK;
}