forked from mirrors/gecko-dev
d2bbf86876
In preparation for the next part, add missing includes to "js/" public headers. Differential Revision: https://phabricator.services.mozilla.com/D122843
448 lines
12 KiB
C++
448 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <stdlib.h>
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#include <errno.h>
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#ifdef HAVE_IO_H
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# include <io.h> /* for isatty() */
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h> /* for isatty() */
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#endif
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#include "base/basictypes.h"
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#include "jsapi.h"
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#include "js/CharacterEncoding.h"
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#include "js/CompilationAndEvaluation.h" // JS::Compile{,Utf8File}
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#include "js/PropertyAndElement.h" // JS_DefineFunctions, JS_DefineProperty, JS_GetProperty
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#include "js/PropertySpec.h"
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#include "js/RealmOptions.h"
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#include "js/SourceText.h" // JS::Source{Ownership,Text}
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#include "xpcpublic.h"
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#include "XPCShellEnvironment.h"
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#include "mozilla/Utf8.h" // mozilla::Utf8Unit
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#include "mozilla/XPCOM.h"
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#include "mozilla/dom/AutoEntryScript.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "nsIPrincipal.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsIXPConnect.h"
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#include "nsJSUtils.h"
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#include "nsJSPrincipals.h"
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#include "nsThreadUtils.h"
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#include "nsXULAppAPI.h"
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#include "BackstagePass.h"
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#include "TestShellChild.h"
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#include "TestShellParent.h"
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using mozilla::AutoSafeJSContext;
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using mozilla::dom::AutoEntryScript;
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using mozilla::dom::AutoJSAPI;
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using mozilla::ipc::XPCShellEnvironment;
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using namespace JS;
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namespace {
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static const char kDefaultRuntimeScriptFilename[] = "xpcshell.js";
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inline XPCShellEnvironment* Environment(JS::Handle<JSObject*> global) {
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AutoJSAPI jsapi;
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if (!jsapi.Init(global)) {
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return nullptr;
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}
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JSContext* cx = jsapi.cx();
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Rooted<Value> v(cx);
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if (!JS_GetProperty(cx, global, "__XPCShellEnvironment", &v) ||
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!v.get().isDouble()) {
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return nullptr;
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}
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return static_cast<XPCShellEnvironment*>(v.get().toPrivate());
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}
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static bool Print(JSContext* cx, unsigned argc, JS::Value* vp) {
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
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for (unsigned i = 0; i < args.length(); i++) {
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JSString* str = JS::ToString(cx, args[i]);
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if (!str) return false;
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JS::UniqueChars bytes = JS_EncodeStringToLatin1(cx, str);
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if (!bytes) return false;
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fprintf(stdout, "%s%s", i ? " " : "", bytes.get());
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fflush(stdout);
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}
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fputc('\n', stdout);
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args.rval().setUndefined();
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return true;
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}
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static bool GetLine(char* bufp, FILE* file, const char* prompt) {
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char line[256];
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fputs(prompt, stdout);
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fflush(stdout);
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if (!fgets(line, sizeof line, file)) return false;
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strcpy(bufp, line);
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return true;
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}
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static bool Dump(JSContext* cx, unsigned argc, JS::Value* vp) {
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
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if (!args.length()) return true;
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JSString* str = JS::ToString(cx, args[0]);
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if (!str) return false;
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JS::UniqueChars bytes = JS_EncodeStringToLatin1(cx, str);
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if (!bytes) return false;
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fputs(bytes.get(), stdout);
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fflush(stdout);
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return true;
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}
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static bool Load(JSContext* cx, unsigned argc, JS::Value* vp) {
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
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JS::RootedObject thisObject(cx);
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if (!args.computeThis(cx, &thisObject)) return false;
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if (!JS_IsGlobalObject(thisObject)) {
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JS_ReportErrorASCII(cx, "Trying to load() into a non-global object");
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return false;
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}
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for (unsigned i = 0; i < args.length(); i++) {
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JS::Rooted<JSString*> str(cx, JS::ToString(cx, args[i]));
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if (!str) return false;
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JS::UniqueChars filename = JS_EncodeStringToLatin1(cx, str);
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if (!filename) return false;
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FILE* file = fopen(filename.get(), "r");
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if (!file) {
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filename = JS_EncodeStringToUTF8(cx, str);
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if (!filename) return false;
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JS_ReportErrorUTF8(cx, "cannot open file '%s' for reading",
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filename.get());
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return false;
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}
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JS::CompileOptions options(cx);
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options.setFileAndLine(filename.get(), 1);
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JS::Rooted<JSScript*> script(cx, JS::CompileUtf8File(cx, options, file));
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fclose(file);
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if (!script) return false;
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if (!JS_ExecuteScript(cx, script)) {
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return false;
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}
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}
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args.rval().setUndefined();
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return true;
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}
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static bool Quit(JSContext* cx, unsigned argc, JS::Value* vp) {
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Rooted<JSObject*> global(cx, JS::CurrentGlobalOrNull(cx));
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XPCShellEnvironment* env = Environment(global);
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env->SetIsQuitting();
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return false;
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}
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static bool DumpXPC(JSContext* cx, unsigned argc, JS::Value* vp) {
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JS::CallArgs args = CallArgsFromVp(argc, vp);
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uint16_t depth = 2;
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if (args.length() > 0) {
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if (!JS::ToUint16(cx, args[0], &depth)) return false;
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}
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nsCOMPtr<nsIXPConnect> xpc = nsIXPConnect::XPConnect();
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if (xpc) xpc->DebugDump(int16_t(depth));
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args.rval().setUndefined();
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return true;
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}
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static bool GC(JSContext* cx, unsigned argc, JS::Value* vp) {
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
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JS_GC(cx);
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args.rval().setUndefined();
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return true;
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}
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#ifdef JS_GC_ZEAL
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static bool GCZeal(JSContext* cx, unsigned argc, JS::Value* vp) {
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CallArgs args = CallArgsFromVp(argc, vp);
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uint32_t zeal;
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if (!ToUint32(cx, args.get(0), &zeal)) return false;
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JS_SetGCZeal(cx, uint8_t(zeal), JS_DEFAULT_ZEAL_FREQ);
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return true;
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}
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#endif
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const JSFunctionSpec gGlobalFunctions[] = {JS_FN("print", Print, 0, 0),
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JS_FN("load", Load, 1, 0),
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JS_FN("quit", Quit, 0, 0),
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JS_FN("dumpXPC", DumpXPC, 1, 0),
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JS_FN("dump", Dump, 1, 0),
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JS_FN("gc", GC, 0, 0),
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#ifdef JS_GC_ZEAL
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JS_FN("gczeal", GCZeal, 1, 0),
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#endif
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JS_FS_END};
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typedef enum JSShellErrNum {
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#define MSG_DEF(name, number, count, exception, format) name = number,
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#include "jsshell.msg"
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#undef MSG_DEF
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JSShellErr_Limit
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#undef MSGDEF
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} JSShellErrNum;
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} /* anonymous namespace */
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void XPCShellEnvironment::ProcessFile(JSContext* cx, const char* filename,
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FILE* file, bool forceTTY) {
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XPCShellEnvironment* env = this;
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JS::Rooted<JS::Value> result(cx);
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int lineno, startline;
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bool ok, hitEOF;
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char *bufp, buffer[4096];
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JSString* str;
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JS::Rooted<JSObject*> global(cx, JS::CurrentGlobalOrNull(cx));
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MOZ_ASSERT(global);
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if (forceTTY) {
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file = stdin;
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} else if (!isatty(fileno(file))) {
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/*
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* It's not interactive - just execute it.
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*
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* Support the UNIX #! shell hack; gobble the first line if it starts
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* with '#'. TODO - this isn't quite compatible with sharp variables,
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* as a legal js program (using sharp variables) might start with '#'.
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* But that would require multi-character lookahead.
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*/
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int ch = fgetc(file);
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if (ch == '#') {
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while ((ch = fgetc(file)) != EOF) {
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if (ch == '\n' || ch == '\r') break;
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}
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}
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ungetc(ch, file);
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JS::CompileOptions options(cx);
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options.setFileAndLine(filename, 1);
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JS::Rooted<JSScript*> script(cx, JS::CompileUtf8File(cx, options, file));
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if (script) {
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(void)JS_ExecuteScript(cx, script, &result);
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}
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return;
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}
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/* It's an interactive filehandle; drop into read-eval-print loop. */
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lineno = 1;
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hitEOF = false;
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do {
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bufp = buffer;
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*bufp = '\0';
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/*
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* Accumulate lines until we get a 'compilable unit' - one that either
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* generates an error (before running out of source) or that compiles
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* cleanly. This should be whenever we get a complete statement that
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* coincides with the end of a line.
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*/
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startline = lineno;
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do {
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if (!GetLine(bufp, file, startline == lineno ? "js> " : "")) {
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hitEOF = true;
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break;
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}
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bufp += strlen(bufp);
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lineno++;
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} while (
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!JS_Utf8BufferIsCompilableUnit(cx, global, buffer, strlen(buffer)));
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/* Clear any pending exception from previous failed compiles. */
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JS_ClearPendingException(cx);
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JS::CompileOptions options(cx);
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options.setFileAndLine("typein", startline);
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JS::SourceText<mozilla::Utf8Unit> srcBuf;
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JS::Rooted<JSScript*> script(cx);
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if (srcBuf.init(cx, buffer, strlen(buffer),
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JS::SourceOwnership::Borrowed) &&
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(script = JS::Compile(cx, options, srcBuf))) {
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ok = JS_ExecuteScript(cx, script, &result);
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if (ok && !result.isUndefined()) {
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/* Suppress warnings from JS::ToString(). */
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JS::AutoSuppressWarningReporter suppressWarnings(cx);
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str = JS::ToString(cx, result);
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JS::UniqueChars bytes;
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if (str) bytes = JS_EncodeStringToLatin1(cx, str);
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if (!!bytes)
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fprintf(stdout, "%s\n", bytes.get());
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else
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ok = false;
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}
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}
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} while (!hitEOF && !env->IsQuitting());
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fprintf(stdout, "\n");
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}
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// static
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XPCShellEnvironment* XPCShellEnvironment::CreateEnvironment() {
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auto* env = new XPCShellEnvironment();
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if (env && !env->Init()) {
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delete env;
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env = nullptr;
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}
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return env;
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}
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XPCShellEnvironment::XPCShellEnvironment() : mQuitting(false) {}
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XPCShellEnvironment::~XPCShellEnvironment() {
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if (GetGlobalObject()) {
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AutoJSAPI jsapi;
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if (!jsapi.Init(GetGlobalObject())) {
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return;
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}
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JS_SetAllNonReservedSlotsToUndefined(mGlobalHolder);
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mGlobalHolder.reset();
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JS_GC(jsapi.cx());
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}
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}
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bool XPCShellEnvironment::Init() {
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nsresult rv;
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// unbuffer stdout so that output is in the correct order; note that stderr
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// is unbuffered by default
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setbuf(stdout, 0);
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AutoSafeJSContext cx;
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mGlobalHolder.init(cx);
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nsCOMPtr<nsIPrincipal> principal;
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nsCOMPtr<nsIScriptSecurityManager> securityManager =
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do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
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if (NS_SUCCEEDED(rv) && securityManager) {
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rv = securityManager->GetSystemPrincipal(getter_AddRefs(principal));
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if (NS_FAILED(rv)) {
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fprintf(stderr,
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"+++ Failed to obtain SystemPrincipal from ScriptSecurityManager "
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"service.\n");
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}
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} else {
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fprintf(stderr,
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"+++ Failed to get ScriptSecurityManager service, running without "
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"principals");
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}
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auto backstagePass = MakeRefPtr<BackstagePass>();
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JS::RealmOptions options;
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options.creationOptions().setNewCompartmentInSystemZone();
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xpc::SetPrefableRealmOptions(options);
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JS::Rooted<JSObject*> globalObj(cx);
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rv = xpc::InitClassesWithNewWrappedGlobal(
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cx, static_cast<nsIGlobalObject*>(backstagePass), principal, 0, options,
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&globalObj);
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if (NS_FAILED(rv)) {
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NS_ERROR("InitClassesWithNewWrappedGlobal failed!");
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return false;
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}
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if (!globalObj) {
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NS_ERROR("Failed to get global JSObject!");
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return false;
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}
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JSAutoRealm ar(cx, globalObj);
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backstagePass->SetGlobalObject(globalObj);
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JS::Rooted<Value> privateVal(cx, PrivateValue(this));
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if (!JS_DefineProperty(cx, globalObj, "__XPCShellEnvironment", privateVal,
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JSPROP_READONLY | JSPROP_PERMANENT) ||
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!JS_DefineFunctions(cx, globalObj, gGlobalFunctions)) {
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NS_ERROR("JS_DefineFunctions failed!");
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return false;
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}
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mGlobalHolder = globalObj;
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FILE* runtimeScriptFile = fopen(kDefaultRuntimeScriptFilename, "r");
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if (runtimeScriptFile) {
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fprintf(stdout, "[loading '%s'...]\n", kDefaultRuntimeScriptFilename);
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ProcessFile(cx, kDefaultRuntimeScriptFilename, runtimeScriptFile, false);
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fclose(runtimeScriptFile);
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}
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return true;
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}
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bool XPCShellEnvironment::EvaluateString(const nsString& aString,
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nsString* aResult) {
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AutoEntryScript aes(GetGlobalObject(),
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"ipc XPCShellEnvironment::EvaluateString");
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JSContext* cx = aes.cx();
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JS::CompileOptions options(cx);
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options.setFileAndLine("typein", 0);
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JS::SourceText<char16_t> srcBuf;
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if (!srcBuf.init(cx, aString.get(), aString.Length(),
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JS::SourceOwnership::Borrowed)) {
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return false;
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}
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JS::Rooted<JSScript*> script(cx, JS::Compile(cx, options, srcBuf));
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if (!script) {
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return false;
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}
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if (aResult) {
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aResult->Truncate();
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}
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JS::Rooted<JS::Value> result(cx);
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bool ok = JS_ExecuteScript(cx, script, &result);
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if (ok && !result.isUndefined()) {
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/* Suppress warnings from JS::ToString(). */
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JS::AutoSuppressWarningReporter suppressWarnings(cx);
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JSString* str = JS::ToString(cx, result);
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nsAutoJSString autoStr;
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if (str) autoStr.init(cx, str);
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if (!autoStr.IsEmpty() && aResult) {
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aResult->Assign(autoStr);
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}
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}
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return true;
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}
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