forked from mirrors/gecko-dev
614 lines
16 KiB
C++
614 lines
16 KiB
C++
/* vim: set ts=8 sts=4 et sw=4 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/OldDebugAPI.h"
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#include "xpcpublic.h"
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#include "XPCShellEnvironment.h"
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#include "mozilla/XPCOM.h"
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#include "nsIChannel.h"
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#include "nsIClassInfo.h"
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#include "nsIDirectoryService.h"
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#include "nsIJSRuntimeService.h"
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#include "nsIPrincipal.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsIURI.h"
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#include "nsIXPConnect.h"
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#include "nsIXPCScriptable.h"
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#include "nsCxPusher.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::ipc::XPCShellEnvironment;
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using mozilla::ipc::TestShellChild;
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using mozilla::ipc::TestShellParent;
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using mozilla::AutoSafeJSContext;
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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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class XPCShellDirProvider : public nsIDirectoryServiceProvider
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIDIRECTORYSERVICEPROVIDER
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XPCShellDirProvider() { }
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~XPCShellDirProvider() { }
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bool SetGREDir(const char *dir);
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void ClearGREDir() { mGREDir = nullptr; }
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private:
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nsCOMPtr<nsIFile> mGREDir;
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};
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inline XPCShellEnvironment*
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Environment(Handle<JSObject*> global)
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{
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AutoSafeJSContext cx;
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JSAutoCompartment ac(cx, global);
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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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{
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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
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Print(JSContext *cx, unsigned argc, JS::Value *vp)
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{
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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)
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return false;
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JSAutoByteString bytes(cx, str);
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if (!bytes)
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return false;
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fprintf(stdout, "%s%s", i ? " " : "", bytes.ptr());
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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
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GetLine(char *bufp,
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FILE *file,
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const char *prompt)
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{
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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))
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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
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Dump(JSContext *cx, unsigned argc, JS::Value *vp)
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{
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
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if (!args.length())
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return true;
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JSString *str = JS::ToString(cx, args[0]);
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if (!str)
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return false;
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JSAutoByteString bytes(cx, str);
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if (!bytes)
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return false;
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fputs(bytes.ptr(), stdout);
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fflush(stdout);
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return true;
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}
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static bool
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Load(JSContext *cx,
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unsigned argc,
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JS::Value *vp)
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{
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
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JS::Rooted<JSObject*> obj(cx, JS_THIS_OBJECT(cx, vp));
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if (!obj)
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return false;
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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)
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return false;
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JSAutoByteString filename(cx, str);
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if (!filename)
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return false;
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FILE *file = fopen(filename.ptr(), "r");
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if (!file) {
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JS_ReportError(cx, "cannot open file '%s' for reading", filename.ptr());
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return false;
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}
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Rooted<JSObject*> global(cx, JS::CurrentGlobalOrNull(cx));
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JS::CompileOptions options(cx);
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options.setUTF8(true)
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.setFileAndLine(filename.ptr(), 1)
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.setPrincipals(Environment(global)->GetPrincipal());
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JS::RootedObject rootedObj(cx, obj);
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JSScript *script = JS::Compile(cx, rootedObj, options, file);
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fclose(file);
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if (!script)
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return false;
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JS::Rooted<JS::Value> result(cx);
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if (!JS_ExecuteScript(cx, obj, script, result.address())) {
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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
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Version(JSContext *cx,
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unsigned argc,
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JS::Value *vp)
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{
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JS::Value *argv = JS_ARGV(cx, vp);
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JS_SET_RVAL(cx, vp, INT_TO_JSVAL(JS_GetVersion(cx)));
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if (argc > 0 && JSVAL_IS_INT(argv[0]))
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JS_SetVersionForCompartment(js::GetContextCompartment(cx),
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JSVersion(JSVAL_TO_INT(argv[0])));
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return true;
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}
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static bool
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BuildDate(JSContext *cx, unsigned argc, JS::Value *vp)
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{
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fprintf(stdout, "built on %s at %s\n", __DATE__, __TIME__);
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return true;
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}
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static bool
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Quit(JSContext *cx,
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unsigned argc,
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JS::Value *vp)
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{
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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
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DumpXPC(JSContext *cx,
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unsigned argc,
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JS::Value *vp)
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{
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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))
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return false;
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}
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nsCOMPtr<nsIXPConnect> xpc = do_GetService(nsIXPConnect::GetCID());
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if (xpc)
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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
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GC(JSContext *cx,
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unsigned argc,
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JS::Value *vp)
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{
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JSRuntime *rt = JS_GetRuntime(cx);
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JS_GC(rt);
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#ifdef JS_GCMETER
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js_DumpGCStats(rt, stdout);
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#endif
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JS_SET_RVAL(cx, vp, JSVAL_VOID);
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return true;
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}
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#ifdef JS_GC_ZEAL
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static bool
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GCZeal(JSContext *cx, unsigned argc, JS::Value *vp)
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{
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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))
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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[] =
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{
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JS_FS("print", Print, 0,0),
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JS_FS("load", Load, 1,0),
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JS_FS("quit", Quit, 0,0),
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JS_FS("version", Version, 1,0),
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JS_FS("build", BuildDate, 0,0),
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JS_FS("dumpXPC", DumpXPC, 1,0),
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JS_FS("dump", Dump, 1,0),
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JS_FS("gc", GC, 0,0),
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#ifdef JS_GC_ZEAL
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JS_FS("gczeal", GCZeal, 1,0),
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#endif
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JS_FS_END
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};
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typedef enum JSShellErrNum
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{
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#define MSG_DEF(name, number, count, exception, format) \
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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
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XPCShellEnvironment::ProcessFile(JSContext *cx,
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JS::Handle<JSObject*> obj,
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const char *filename,
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FILE *file,
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bool forceTTY)
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{
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XPCShellEnvironment* env = this;
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JSScript *script;
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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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if (forceTTY) {
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file = stdin;
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}
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else
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#ifdef HAVE_ISATTY
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if (!isatty(fileno(file)))
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#endif
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{
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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')
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break;
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}
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}
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ungetc(ch, file);
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JSAutoRequest ar(cx);
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JSAutoCompartment ac(cx, obj);
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JS::CompileOptions options(cx);
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options.setUTF8(true)
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.setFileAndLine(filename, 1)
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.setPrincipals(env->GetPrincipal());
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JSScript* script = JS::Compile(cx, obj, options, file);
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if (script)
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(void)JS_ExecuteScript(cx, obj, script, result.address());
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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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JSAutoRequest ar(cx);
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JSAutoCompartment ac(cx, obj);
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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 (!JS_BufferIsCompilableUnit(cx, obj, 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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script =
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JS_CompileScriptForPrincipals(cx, obj, env->GetPrincipal(), buffer,
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strlen(buffer), "typein", startline);
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if (script) {
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JSErrorReporter older;
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ok = JS_ExecuteScript(cx, obj, script, result.address());
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if (ok && result != JSVAL_VOID) {
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/* Suppress error reports from JS::ToString(). */
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older = JS_SetErrorReporter(cx, nullptr);
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str = JS::ToString(cx, result);
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JSAutoByteString bytes;
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if (str)
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bytes.encodeLatin1(cx, str);
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JS_SetErrorReporter(cx, older);
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if (!!bytes)
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fprintf(stdout, "%s\n", bytes.ptr());
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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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NS_IMETHODIMP_(nsrefcnt)
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XPCShellDirProvider::AddRef()
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{
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return 2;
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}
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NS_IMETHODIMP_(nsrefcnt)
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XPCShellDirProvider::Release()
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{
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return 1;
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}
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NS_IMPL_QUERY_INTERFACE1(XPCShellDirProvider, nsIDirectoryServiceProvider)
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bool
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XPCShellDirProvider::SetGREDir(const char *dir)
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{
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nsresult rv = XRE_GetFileFromPath(dir, getter_AddRefs(mGREDir));
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return NS_SUCCEEDED(rv);
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}
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NS_IMETHODIMP
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XPCShellDirProvider::GetFile(const char *prop,
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bool *persistent,
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nsIFile* *result)
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{
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if (mGREDir && !strcmp(prop, NS_GRE_DIR)) {
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*persistent = true;
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NS_ADDREF(*result = mGREDir);
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return NS_OK;
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}
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return NS_ERROR_FAILURE;
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}
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// static
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XPCShellEnvironment*
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XPCShellEnvironment::CreateEnvironment()
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{
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XPCShellEnvironment* 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()
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: mQuitting(false)
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{
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}
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XPCShellEnvironment::~XPCShellEnvironment()
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{
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AutoSafeJSContext cx;
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Rooted<JSObject*> global(cx, GetGlobalObject());
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if (global) {
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{
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JSAutoCompartment ac(cx, global);
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JS_SetAllNonReservedSlotsToUndefined(cx, global);
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}
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mGlobalHolder.Release();
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JSRuntime *rt = JS_GetRuntime(cx);
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JS_GC(rt);
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}
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}
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bool
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XPCShellEnvironment::Init()
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{
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nsresult rv;
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#ifdef HAVE_SETBUF
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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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#endif
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nsCOMPtr<nsIJSRuntimeService> rtsvc =
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do_GetService("@mozilla.org/js/xpc/RuntimeService;1");
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if (!rtsvc) {
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NS_ERROR("failed to get nsJSRuntimeService!");
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return false;
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}
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JSRuntime *rt;
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if (NS_FAILED(rtsvc->GetRuntime(&rt)) || !rt) {
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NS_ERROR("failed to get JSRuntime from nsJSRuntimeService!");
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return false;
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}
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if (!mGlobalHolder.Hold(rt)) {
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NS_ERROR("Can't protect global object!");
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return false;
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}
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AutoSafeJSContext cx;
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JS_SetContextPrivate(cx, this);
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nsCOMPtr<nsIXPConnect> xpc =
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do_GetService(nsIXPConnect::GetCID());
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if (!xpc) {
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NS_ERROR("failed to get nsXPConnect service!");
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return false;
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}
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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, "+++ Failed to obtain SystemPrincipal from ScriptSecurityManager service.\n");
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}
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} else {
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fprintf(stderr, "+++ Failed to get ScriptSecurityManager service, running without principals");
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}
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nsRefPtr<BackstagePass> backstagePass;
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rv = NS_NewBackstagePass(getter_AddRefs(backstagePass));
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if (NS_FAILED(rv)) {
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NS_ERROR("Failed to create backstage pass!");
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return false;
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}
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JS::CompartmentOptions options;
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options.setZone(JS::SystemZone)
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.setVersion(JSVERSION_LATEST);
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nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
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rv = xpc->InitClassesWithNewWrappedGlobal(cx,
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static_cast<nsIGlobalObject *>(backstagePass),
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principal, 0,
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options,
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getter_AddRefs(holder));
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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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JS::Rooted<JSObject*> globalObj(cx, holder->GetJSObject());
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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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JSAutoCompartment ac(cx, globalObj);
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backstagePass->SetGlobalObject(globalObj);
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if (!JS_DefineProperty(cx, globalObj, "__XPCShellEnvironment",
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PRIVATE_TO_JSVAL(this), JS_PropertyStub,
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JS_StrictPropertyStub,
|
|
JSPROP_READONLY | JSPROP_PERMANENT) ||
|
|
!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, globalObj, 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);
|
|
|
|
JSScript* script =
|
|
JS_CompileUCScriptForPrincipals(cx, global, GetPrincipal(),
|
|
aString.get(), aString.Length(),
|
|
"typein", 0);
|
|
if (!script) {
|
|
return false;
|
|
}
|
|
|
|
if (aResult) {
|
|
aResult->Truncate();
|
|
}
|
|
|
|
JS::Rooted<JS::Value> result(cx);
|
|
bool ok = JS_ExecuteScript(cx, global, script, result.address());
|
|
if (ok && result != JSVAL_VOID) {
|
|
JSErrorReporter old = JS_SetErrorReporter(cx, nullptr);
|
|
JSString* str = JS::ToString(cx, result);
|
|
nsDependentJSString depStr;
|
|
if (str)
|
|
depStr.init(cx, str);
|
|
JS_SetErrorReporter(cx, old);
|
|
|
|
if (!depStr.IsEmpty() && aResult) {
|
|
aResult->Assign(depStr);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|