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tenfourfox/ipc/testshell/XPCShellEnvironment.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=8 sts=4 et sw=4 tw=80:
* 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/. */
#include <stdlib.h>
#include <errno.h>
#ifdef HAVE_IO_H
#include <io.h> /* for isatty() */
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* for isatty() */
#endif
#include "base/basictypes.h"
#include "jsapi.h"
#include "xpcpublic.h"
#include "XPCShellEnvironment.h"
#include "mozilla/XPCOM.h"
#include "nsIChannel.h"
#include "nsIClassInfo.h"
#include "nsIDirectoryService.h"
#include "nsIPrincipal.h"
#include "nsIScriptSecurityManager.h"
#include "nsIURI.h"
#include "nsIXPConnect.h"
#include "nsIXPCScriptable.h"
#include "nsJSUtils.h"
#include "nsJSPrincipals.h"
#include "nsThreadUtils.h"
#include "nsXULAppAPI.h"
#include "BackstagePass.h"
#include "TestShellChild.h"
#include "TestShellParent.h"
using mozilla::ipc::XPCShellEnvironment;
using mozilla::ipc::TestShellChild;
using mozilla::ipc::TestShellParent;
using mozilla::AutoSafeJSContext;
using namespace JS;
namespace {
static const char kDefaultRuntimeScriptFilename[] = "xpcshell.js";
class XPCShellDirProvider : public nsIDirectoryServiceProvider
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIDIRECTORYSERVICEPROVIDER
XPCShellDirProvider() { }
~XPCShellDirProvider() { }
bool SetGREDirs(const char *dir);
void ClearGREDirs() { mGREDir = nullptr;
mGREBinDir = nullptr; }
private:
nsCOMPtr<nsIFile> mGREDir;
nsCOMPtr<nsIFile> mGREBinDir;
};
inline XPCShellEnvironment*
Environment(JS::Handle<JSObject*> global)
{
AutoSafeJSContext cx;
JSAutoCompartment ac(cx, global);
Rooted<Value> v(cx);
if (!JS_GetProperty(cx, global, "__XPCShellEnvironment", &v) ||
!v.get().isDouble())
{
return nullptr;
}
return static_cast<XPCShellEnvironment*>(v.get().toPrivate());
}
static bool
Print(JSContext *cx, unsigned argc, JS::Value *vp)
{
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
for (unsigned i = 0; i < args.length(); i++) {
JSString *str = JS::ToString(cx, args[i]);
if (!str)
return false;
JSAutoByteString bytes(cx, str);
if (!bytes)
return false;
fprintf(stdout, "%s%s", i ? " " : "", bytes.ptr());
fflush(stdout);
}
fputc('\n', stdout);
args.rval().setUndefined();
return true;
}
static bool
GetLine(char *bufp,
FILE *file,
const char *prompt)
{
char line[256];
fputs(prompt, stdout);
fflush(stdout);
if (!fgets(line, sizeof line, file))
return false;
strcpy(bufp, line);
return true;
}
static bool
Dump(JSContext *cx, unsigned argc, JS::Value *vp)
{
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
if (!args.length())
return true;
JSString *str = JS::ToString(cx, args[0]);
if (!str)
return false;
JSAutoByteString bytes(cx, str);
if (!bytes)
return false;
fputs(bytes.ptr(), stdout);
fflush(stdout);
return true;
}
static bool
Load(JSContext *cx,
unsigned argc,
JS::Value *vp)
{
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
JS::Rooted<JSObject*> obj(cx, JS_THIS_OBJECT(cx, vp));
if (!obj)
return false;
if (!JS_IsGlobalObject(obj)) {
JS_ReportError(cx, "Trying to load() into a non-global object");
return false;
}
for (unsigned i = 0; i < args.length(); i++) {
JS::Rooted<JSString*> str(cx, JS::ToString(cx, args[i]));
if (!str)
return false;
JSAutoByteString filename(cx, str);
if (!filename)
return false;
FILE *file = fopen(filename.ptr(), "r");
if (!file) {
JS_ReportError(cx, "cannot open file '%s' for reading", filename.ptr());
return false;
}
JS::CompileOptions options(cx);
options.setUTF8(true)
.setFileAndLine(filename.ptr(), 1);
JS::Rooted<JSScript*> script(cx);
bool ok = JS::Compile(cx, options, file, &script);
fclose(file);
if (!ok)
return false;
if (!JS_ExecuteScript(cx, script)) {
return false;
}
}
args.rval().setUndefined();
return true;
}
static bool
Version(JSContext *cx,
unsigned argc,
JS::Value *vp)
{
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
args.rval().setInt32(JS_GetVersion(cx));
if (args.get(0).isInt32())
JS_SetVersionForCompartment(js::GetContextCompartment(cx),
JSVersion(args[0].toInt32()));
return true;
}
static bool
Quit(JSContext *cx,
unsigned argc,
JS::Value *vp)
{
Rooted<JSObject*> global(cx, JS::CurrentGlobalOrNull(cx));
XPCShellEnvironment* env = Environment(global);
env->SetIsQuitting();
return false;
}
static bool
DumpXPC(JSContext *cx,
unsigned argc,
JS::Value *vp)
{
JS::CallArgs args = CallArgsFromVp(argc, vp);
uint16_t depth = 2;
if (args.length() > 0) {
if (!JS::ToUint16(cx, args[0], &depth))
return false;
}
nsCOMPtr<nsIXPConnect> xpc = do_GetService(nsIXPConnect::GetCID());
if (xpc)
xpc->DebugDump(int16_t(depth));
args.rval().setUndefined();
return true;
}
static bool
GC(JSContext *cx,
unsigned argc,
JS::Value *vp)
{
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
JSRuntime *rt = JS_GetRuntime(cx);
JS_GC(rt);
#ifdef JS_GCMETER
js_DumpGCStats(rt, stdout);
#endif
args.rval().setUndefined();
return true;
}
#ifdef JS_GC_ZEAL
static bool
GCZeal(JSContext *cx, unsigned argc, JS::Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
uint32_t zeal;
if (!ToUint32(cx, args.get(0), &zeal))
return false;
JS_SetGCZeal(cx, uint8_t(zeal), JS_DEFAULT_ZEAL_FREQ);
return true;
}
#endif
const JSFunctionSpec gGlobalFunctions[] =
{
JS_FS("print", Print, 0,0),
JS_FS("load", Load, 1,0),
JS_FS("quit", Quit, 0,0),
JS_FS("version", Version, 1,0),
JS_FS("dumpXPC", DumpXPC, 1,0),
JS_FS("dump", Dump, 1,0),
JS_FS("gc", GC, 0,0),
#ifdef JS_GC_ZEAL
JS_FS("gczeal", GCZeal, 1,0),
#endif
JS_FS_END
};
typedef enum JSShellErrNum
{
#define MSG_DEF(name, number, count, exception, format) \
name = number,
#include "jsshell.msg"
#undef MSG_DEF
JSShellErr_Limit
#undef MSGDEF
} JSShellErrNum;
} /* anonymous namespace */
void
XPCShellEnvironment::ProcessFile(JSContext *cx,
const char *filename,
FILE *file,
bool forceTTY)
{
XPCShellEnvironment* env = this;
JS::Rooted<JS::Value> result(cx);
int lineno, startline;
bool ok, hitEOF;
char *bufp, buffer[4096];
JSString *str;
JS::Rooted<JSObject*> global(cx, JS::CurrentGlobalOrNull(cx));
MOZ_ASSERT(global);
if (forceTTY) {
file = stdin;
}
else if (!isatty(fileno(file)))
{
/*
* It's not interactive - just execute it.
*
* Support the UNIX #! shell hack; gobble the first line if it starts
* with '#'. TODO - this isn't quite compatible with sharp variables,
* as a legal js program (using sharp variables) might start with '#'.
* But that would require multi-character lookahead.
*/
int ch = fgetc(file);
if (ch == '#') {
while((ch = fgetc(file)) != EOF) {
if(ch == '\n' || ch == '\r')
break;
}
}
ungetc(ch, file);
JS::CompileOptions options(cx);
options.setUTF8(true)
.setFileAndLine(filename, 1);
JS::Rooted<JSScript*> script(cx);
if (JS::Compile(cx, options, file, &script))
(void)JS_ExecuteScript(cx, script, &result);
return;
}
/* It's an interactive filehandle; drop into read-eval-print loop. */
lineno = 1;
hitEOF = false;
do {
bufp = buffer;
*bufp = '\0';
/*
* Accumulate lines until we get a 'compilable unit' - one that either
* generates an error (before running out of source) or that compiles
* cleanly. This should be whenever we get a complete statement that
* coincides with the end of a line.
*/
startline = lineno;
do {
if (!GetLine(bufp, file, startline == lineno ? "js> " : "")) {
hitEOF = true;
break;
}
bufp += strlen(bufp);
lineno++;
} while (!JS_BufferIsCompilableUnit(cx, global, buffer, strlen(buffer)));
/* Clear any pending exception from previous failed compiles. */
JS_ClearPendingException(cx);
JS::CompileOptions options(cx);
options.setFileAndLine("typein", startline);
JS::Rooted<JSScript*> script(cx);
if (JS_CompileScript(cx, buffer, strlen(buffer), options, &script)) {
JSErrorReporter older;
ok = JS_ExecuteScript(cx, script, &result);
if (ok && !result.isUndefined()) {
/* Suppress error reports from JS::ToString(). */
older = JS_SetErrorReporter(JS_GetRuntime(cx), nullptr);
str = JS::ToString(cx, result);
JSAutoByteString bytes;
if (str)
bytes.encodeLatin1(cx, str);
JS_SetErrorReporter(JS_GetRuntime(cx), older);
if (!!bytes)
fprintf(stdout, "%s\n", bytes.ptr());
else
ok = false;
}
}
} while (!hitEOF && !env->IsQuitting());
fprintf(stdout, "\n");
}
NS_IMETHODIMP_(MozExternalRefCountType)
XPCShellDirProvider::AddRef()
{
return 2;
}
NS_IMETHODIMP_(MozExternalRefCountType)
XPCShellDirProvider::Release()
{
return 1;
}
NS_IMPL_QUERY_INTERFACE(XPCShellDirProvider, nsIDirectoryServiceProvider)
bool
XPCShellDirProvider::SetGREDirs(const char *dir)
{
nsresult rv = XRE_GetFileFromPath(dir, getter_AddRefs(mGREDir));
if (NS_SUCCEEDED(rv)) {
mGREDir->Clone(getter_AddRefs(mGREBinDir));
#ifdef XP_MACOSX
mGREBinDir->SetNativeLeafName(NS_LITERAL_CSTRING("MacOS"));
#endif
}
return NS_SUCCEEDED(rv);
}
NS_IMETHODIMP
XPCShellDirProvider::GetFile(const char *prop,
bool *persistent,
nsIFile* *result)
{
if (mGREDir && !strcmp(prop, NS_GRE_DIR)) {
*persistent = true;
NS_ADDREF(*result = mGREDir);
return NS_OK;
} else if (mGREBinDir && !strcmp(prop, NS_GRE_BIN_DIR)) {
*persistent = true;
NS_ADDREF(*result = mGREBinDir);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
// static
XPCShellEnvironment*
XPCShellEnvironment::CreateEnvironment()
{
XPCShellEnvironment* env = new XPCShellEnvironment();
if (env && !env->Init()) {
delete env;
env = nullptr;
}
return env;
}
XPCShellEnvironment::XPCShellEnvironment()
: mQuitting(false)
{
}
XPCShellEnvironment::~XPCShellEnvironment()
{
AutoSafeJSContext cx;
Rooted<JSObject*> global(cx, GetGlobalObject());
if (global) {
{
JSAutoCompartment ac(cx, global);
JS_SetAllNonReservedSlotsToUndefined(cx, global);
}
mGlobalHolder.reset();
JSRuntime *rt = JS_GetRuntime(cx);
JS_GC(rt);
}
}
bool
XPCShellEnvironment::Init()
{
nsresult rv;
// unbuffer stdout so that output is in the correct order; note that stderr
// is unbuffered by default
setbuf(stdout, 0);
JSRuntime *rt = xpc::GetJSRuntime();
if (!rt) {
NS_ERROR("failed to get JSRuntime from nsJSRuntimeService!");
return false;
}
mGlobalHolder.init(rt);
AutoSafeJSContext cx;
JS_SetContextPrivate(cx, this);
nsCOMPtr<nsIXPConnect> xpc =
do_GetService(nsIXPConnect::GetCID());
if (!xpc) {
NS_ERROR("failed to get nsXPConnect service!");
return false;
}
nsCOMPtr<nsIPrincipal> principal;
nsCOMPtr<nsIScriptSecurityManager> securityManager =
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv) && securityManager) {
rv = securityManager->GetSystemPrincipal(getter_AddRefs(principal));
if (NS_FAILED(rv)) {
fprintf(stderr, "+++ Failed to obtain SystemPrincipal from ScriptSecurityManager service.\n");
}
} else {
fprintf(stderr, "+++ Failed to get ScriptSecurityManager service, running without principals");
}
RefPtr<BackstagePass> backstagePass;
rv = NS_NewBackstagePass(getter_AddRefs(backstagePass));
if (NS_FAILED(rv)) {
NS_ERROR("Failed to create backstage pass!");
return false;
}
JS::CompartmentOptions options;
options.setZone(JS::SystemZone)
.setVersion(JSVERSION_LATEST);
nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
rv = xpc->InitClassesWithNewWrappedGlobal(cx,
static_cast<nsIGlobalObject *>(backstagePass),
principal, 0,
options,
getter_AddRefs(holder));
if (NS_FAILED(rv)) {
NS_ERROR("InitClassesWithNewWrappedGlobal failed!");
return false;
}
JS::Rooted<JSObject*> globalObj(cx, holder->GetJSObject());
if (!globalObj) {
NS_ERROR("Failed to get global JSObject!");
return false;
}
JSAutoCompartment ac(cx, globalObj);
backstagePass->SetGlobalObject(globalObj);
JS::Rooted<Value> privateVal(cx, PrivateValue(this));
if (!JS_DefineProperty(cx, globalObj, "__XPCShellEnvironment",
privateVal,
JSPROP_READONLY | JSPROP_PERMANENT,
JS_STUBGETTER, JS_STUBSETTER) ||
!JS_DefineFunctions(cx, globalObj, gGlobalFunctions) ||
!JS_DefineProfilingFunctions(cx, globalObj))
{
NS_ERROR("JS_DefineFunctions failed!");
return false;
}
mGlobalHolder = globalObj;
FILE* runtimeScriptFile = fopen(kDefaultRuntimeScriptFilename, "r");
if (runtimeScriptFile) {
fprintf(stdout, "[loading '%s'...]\n", kDefaultRuntimeScriptFilename);
ProcessFile(cx, kDefaultRuntimeScriptFilename,
runtimeScriptFile, false);
fclose(runtimeScriptFile);
}
return true;
}
bool
XPCShellEnvironment::EvaluateString(const nsString& aString,
nsString* aResult)
{
AutoSafeJSContext cx;
JS::Rooted<JSObject*> global(cx, GetGlobalObject());
JSAutoCompartment ac(cx, global);
JS::CompileOptions options(cx);
options.setFileAndLine("typein", 0);
JS::Rooted<JSScript*> script(cx);
if (!JS_CompileUCScript(cx, aString.get(), aString.Length(), options,
&script))
{
return false;
}
if (aResult) {
aResult->Truncate();
}
JS::Rooted<JS::Value> result(cx);
bool ok = JS_ExecuteScript(cx, script, &result);
if (ok && !result.isUndefined()) {
JSErrorReporter old = JS_SetErrorReporter(JS_GetRuntime(cx), nullptr);
JSString* str = JS::ToString(cx, result);
nsAutoJSString autoStr;
if (str)
autoStr.init(cx, str);
JS_SetErrorReporter(JS_GetRuntime(cx), old);
if (!autoStr.IsEmpty() && aResult) {
aResult->Assign(autoStr);
}
}
return true;
}
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