Add m-esr52 at 52.6.0

12 files changed, 1013 insertions, 0 deletions

diff --git a/ipc/testshell/PTestShell.ipdl b/ipc/testshell/PTestShell.ipdl
new file mode 100644
index 0000000000..db4d7eedcb
--- /dev/null
+++ b/ipc/testshell/PTestShell.ipdl
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 8 -*- */
+/* 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 protocol PContent;
+include protocol PTestShellCommand;
+
+namespace mozilla {
+namespace ipc {
+
+async protocol PTestShell
+{
+  manager PContent;
+
+  manages PTestShellCommand;
+
+child:
+  async __delete__();
+
+  async ExecuteCommand(nsString aCommand);
+
+  async PTestShellCommand(nsString aCommand);
+};
+
+} // namespace ipc
+} // namespace mozilla
diff --git a/ipc/testshell/PTestShellCommand.ipdl b/ipc/testshell/PTestShellCommand.ipdl
new file mode 100644
index 0000000000..fb6efd99fd
--- /dev/null
+++ b/ipc/testshell/PTestShellCommand.ipdl
@@ -0,0 +1,20 @@
+/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 8 -*- */
+/* 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 protocol PTestShell;
+
+namespace mozilla {
+namespace ipc {
+
+protocol PTestShellCommand
+{
+  manager PTestShell;
+
+parent:
+  async __delete__(nsString aResponse);
+};
+
+} // namespace ipc
+} // namespace mozilla
diff --git a/ipc/testshell/TestShellChild.cpp b/ipc/testshell/TestShellChild.cpp
new file mode 100644
index 0000000000..adb60e0880
--- /dev/null
+++ b/ipc/testshell/TestShellChild.cpp
@@ -0,0 +1,56 @@
+/* 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 "TestShellChild.h"
+
+using mozilla::ipc::TestShellChild;
+using mozilla::ipc::PTestShellCommandChild;
+using mozilla::ipc::XPCShellEnvironment;
+
+TestShellChild::TestShellChild()
+: mXPCShell(XPCShellEnvironment::CreateEnvironment())
+{
+}
+
+bool
+TestShellChild::RecvExecuteCommand(const nsString& aCommand)
+{
+  if (mXPCShell->IsQuitting()) {
+    NS_WARNING("Commands sent after quit command issued!");
+    return false;
+  }
+
+  return mXPCShell->EvaluateString(aCommand);
+}
+
+PTestShellCommandChild*
+TestShellChild::AllocPTestShellCommandChild(const nsString& aCommand)
+{
+  return new PTestShellCommandChild();
+}
+
+bool
+TestShellChild::DeallocPTestShellCommandChild(PTestShellCommandChild* aCommand)
+{
+  delete aCommand;
+  return true;
+}
+
+bool
+TestShellChild::RecvPTestShellCommandConstructor(PTestShellCommandChild* aActor,
+                                                 const nsString& aCommand)
+{
+  if (mXPCShell->IsQuitting()) {
+    NS_WARNING("Commands sent after quit command issued!");
+    return false;
+  }
+
+  nsString response;
+  if (!mXPCShell->EvaluateString(aCommand, &response)) {
+    return false;
+  }
+
+  return PTestShellCommandChild::Send__delete__(aActor, response);
+}
+
diff --git a/ipc/testshell/TestShellChild.h b/ipc/testshell/TestShellChild.h
new file mode 100644
index 0000000000..fcd1301eb3
--- /dev/null
+++ b/ipc/testshell/TestShellChild.h
@@ -0,0 +1,45 @@
+/* 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/. */
+
+#ifndef ipc_testshell_TestShellChild_h
+#define ipc_testshell_TestShellChild_h 1
+
+#include "mozilla/ipc/PTestShellChild.h"
+#include "mozilla/ipc/PTestShellCommandChild.h"
+#include "mozilla/ipc/XPCShellEnvironment.h"
+
+#include "nsAutoPtr.h"
+
+namespace mozilla {
+
+namespace ipc {
+
+class XPCShellEnvironment;
+
+class TestShellChild : public PTestShellChild
+{
+public:
+  TestShellChild();
+
+  bool
+  RecvExecuteCommand(const nsString& aCommand);
+
+  PTestShellCommandChild*
+  AllocPTestShellCommandChild(const nsString& aCommand);
+
+  bool
+  RecvPTestShellCommandConstructor(PTestShellCommandChild* aActor,
+                                   const nsString& aCommand);
+
+  bool
+  DeallocPTestShellCommandChild(PTestShellCommandChild* aCommand);
+
+private:
+  nsAutoPtr<XPCShellEnvironment> mXPCShell;
+};
+
+} /* namespace ipc */
+} /* namespace mozilla */
+
+#endif /* ipc_testshell_TestShellChild_h */
diff --git a/ipc/testshell/TestShellParent.cpp b/ipc/testshell/TestShellParent.cpp
new file mode 100644
index 0000000000..f0c851101a
--- /dev/null
+++ b/ipc/testshell/TestShellParent.cpp
@@ -0,0 +1,109 @@
+/* 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 "TestShellParent.h"
+
+/* This must occur *after* TestShellParent.h to avoid typedefs conflicts. */
+#include "jsfriendapi.h"
+#include "mozilla/ArrayUtils.h"
+
+#include "mozilla/dom/ContentParent.h"
+#include "mozilla/dom/ScriptSettings.h"
+
+#include "xpcpublic.h"
+
+using namespace mozilla;
+using mozilla::ipc::TestShellParent;
+using mozilla::ipc::TestShellCommandParent;
+using mozilla::ipc::PTestShellCommandParent;
+using mozilla::dom::ContentParent;
+
+void
+TestShellParent::ActorDestroy(ActorDestroyReason aWhy)
+{
+  // Implement me! Bug 1005177
+}
+
+PTestShellCommandParent*
+TestShellParent::AllocPTestShellCommandParent(const nsString& aCommand)
+{
+  return new TestShellCommandParent();
+}
+
+bool
+TestShellParent::DeallocPTestShellCommandParent(PTestShellCommandParent* aActor)
+{
+  delete aActor;
+  return true;
+}
+
+bool
+TestShellParent::CommandDone(TestShellCommandParent* command,
+                             const nsString& aResponse)
+{
+  // XXX what should happen if the callback fails?
+  /*bool ok = */command->RunCallback(aResponse);
+  command->ReleaseCallback();
+
+  return true;
+}
+
+bool
+TestShellCommandParent::SetCallback(JSContext* aCx,
+                                    const JS::Value& aCallback)
+{
+  if (!mCallback.initialized()) {
+    mCallback.init(aCx, aCallback);
+    return true;
+  }
+
+  mCallback = aCallback;
+
+  return true;
+}
+
+bool
+TestShellCommandParent::RunCallback(const nsString& aResponse)
+{
+  NS_ENSURE_TRUE(mCallback.isObject(), false);
+
+  // We're about to run script via JS_CallFunctionValue, so we need an
+  // AutoEntryScript. This is just for testing and not in any spec.
+  dom::AutoEntryScript aes(&mCallback.toObject(), "TestShellCommand");
+  JSContext* cx = aes.cx();
+  JS::Rooted<JSObject*> global(cx, JS::CurrentGlobalOrNull(cx));
+
+  JSString* str = JS_NewUCStringCopyN(cx, aResponse.get(), aResponse.Length());
+  NS_ENSURE_TRUE(str, false);
+
+  JS::Rooted<JS::Value> strVal(cx, JS::StringValue(str));
+
+  JS::Rooted<JS::Value> rval(cx);
+  JS::Rooted<JS::Value> callback(cx, mCallback);
+  bool ok = JS_CallFunctionValue(cx, global, callback, JS::HandleValueArray(strVal), &rval);
+  NS_ENSURE_TRUE(ok, false);
+
+  return true;
+}
+
+void
+TestShellCommandParent::ReleaseCallback()
+{
+  mCallback.reset();
+}
+
+bool
+TestShellCommandParent::ExecuteCallback(const nsString& aResponse)
+{
+  return static_cast<TestShellParent*>(Manager())->CommandDone(
+      this, aResponse);
+}
+
+void
+TestShellCommandParent::ActorDestroy(ActorDestroyReason why)
+{
+  if (why == AbnormalShutdown) {
+    ExecuteCallback(EmptyString());
+  }
+}
diff --git a/ipc/testshell/TestShellParent.h b/ipc/testshell/TestShellParent.h
new file mode 100644
index 0000000000..34190bda37
--- /dev/null
+++ b/ipc/testshell/TestShellParent.h
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* 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/. */
+
+#ifndef ipc_testshell_TestShellParent_h
+#define ipc_testshell_TestShellParent_h 1
+
+#include "mozilla/ipc/PTestShellParent.h"
+#include "mozilla/ipc/PTestShellCommandParent.h"
+
+#include "js/TypeDecls.h"
+#include "js/RootingAPI.h"
+#include "nsString.h"
+
+namespace mozilla {
+
+namespace ipc {
+
+class TestShellCommandParent;
+
+class TestShellParent : public PTestShellParent
+{
+public:
+  virtual void ActorDestroy(ActorDestroyReason aWhy) override;
+
+  PTestShellCommandParent*
+  AllocPTestShellCommandParent(const nsString& aCommand) override;
+
+  bool
+  DeallocPTestShellCommandParent(PTestShellCommandParent* aActor) override;
+
+  bool
+  CommandDone(TestShellCommandParent* aActor, const nsString& aResponse);
+};
+
+
+class TestShellCommandParent : public PTestShellCommandParent
+{
+public:
+  TestShellCommandParent() {}
+
+  bool SetCallback(JSContext* aCx, const JS::Value& aCallback);
+
+  bool RunCallback(const nsString& aResponse);
+
+  void ReleaseCallback();
+
+protected:
+  bool ExecuteCallback(const nsString& aResponse);
+
+  void ActorDestroy(ActorDestroyReason why);
+
+  bool Recv__delete__(const nsString& aResponse) {
+    return ExecuteCallback(aResponse);
+  }
+
+private:
+  JS::PersistentRooted<JS::Value> mCallback;
+};
+
+
+} /* namespace ipc */
+} /* namespace mozilla */
+
+#endif /* ipc_testshell_TestShellParent_h */
diff --git a/ipc/testshell/XPCShellEnvironment.cpp b/ipc/testshell/XPCShellEnvironment.cpp
new file mode 100644
index 0000000000..a6979ccae5
--- /dev/null
+++ b/ipc/testshell/XPCShellEnvironment.cpp
@@ -0,0 +1,541 @@
+/* -*- 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 mozilla::dom::AutoJSAPI;
+using mozilla::dom::AutoEntryScript;
+using namespace JS;
+
+namespace {
+
+static const char kDefaultRuntimeScriptFilename[] = "xpcshell.js";
+
+inline XPCShellEnvironment*
+Environment(Handle<JSObject*> global)
+{
+    AutoJSAPI jsapi;
+    if (!jsapi.Init(global)) {
+        return nullptr;
+    }
+    JSContext* cx = jsapi.cx();
+    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_ReportErrorASCII(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) {
+            filename.clear();
+            if (!filename.encodeUtf8(cx, str))
+                return false;
+            JS_ReportErrorUTF8(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);
+
+    JS_GC(cx);
+
+    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)) {
+            JS::WarningReporter older;
+
+            ok = JS_ExecuteScript(cx, script, &result);
+            if (ok && !result.isUndefined()) {
+                /* Suppress warnings from JS::ToString(). */
+                older = JS::SetWarningReporter(cx, nullptr);
+                str = JS::ToString(cx, result);
+                JSAutoByteString bytes;
+                if (str)
+                    bytes.encodeLatin1(cx, str);
+                JS::SetWarningReporter(cx, older);
+
+                if (!!bytes)
+                    fprintf(stdout, "%s\n", bytes.ptr());
+                else
+                    ok = false;
+            }
+        }
+    } while (!hitEOF && !env->IsQuitting());
+
+    fprintf(stdout, "\n");
+}
+
+// static
+XPCShellEnvironment*
+XPCShellEnvironment::CreateEnvironment()
+{
+    XPCShellEnvironment* env = new XPCShellEnvironment();
+    if (env && !env->Init()) {
+        delete env;
+        env = nullptr;
+    }
+    return env;
+}
+
+XPCShellEnvironment::XPCShellEnvironment()
+:   mQuitting(false)
+{
+}
+
+XPCShellEnvironment::~XPCShellEnvironment()
+{
+    if (GetGlobalObject()) {
+        AutoJSAPI jsapi;
+        if (!jsapi.Init(GetGlobalObject())) {
+            return;
+        }
+        JSContext* cx = jsapi.cx();
+        Rooted<JSObject*> global(cx, GetGlobalObject());
+
+        {
+            JSAutoCompartment ac(cx, global);
+            JS_SetAllNonReservedSlotsToUndefined(cx, global);
+        }
+        mGlobalHolder.reset();
+
+        JS_GC(cx);
+    }
+}
+
+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);
+
+    AutoSafeJSContext cx;
+
+    mGlobalHolder.init(cx);
+
+    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.creationOptions().setZone(JS::SystemZone);
+    options.behaviors().setVersion(JSVERSION_LATEST);
+    if (xpc::SharedMemoryEnabled())
+        options.creationOptions().setSharedMemoryAndAtomicsEnabled(true);
+
+    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)
+{
+  AutoEntryScript aes(GetGlobalObject(),
+                      "ipc XPCShellEnvironment::EvaluateString");
+  JSContext* cx = aes.cx();
+
+  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()) {
+      JS::WarningReporter old = JS::SetWarningReporter(cx, nullptr);
+      JSString* str = JS::ToString(cx, result);
+      nsAutoJSString autoStr;
+      if (str)
+          autoStr.init(cx, str);
+      JS::SetWarningReporter(cx, old);
+
+      if (!autoStr.IsEmpty() && aResult) {
+          aResult->Assign(autoStr);
+      }
+  }
+
+  return true;
+}
diff --git a/ipc/testshell/XPCShellEnvironment.h b/ipc/testshell/XPCShellEnvironment.h
new file mode 100644
index 0000000000..c998e6a15d
--- /dev/null
+++ b/ipc/testshell/XPCShellEnvironment.h
@@ -0,0 +1,64 @@
+/* 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/. */
+
+#ifndef _IPC_TESTSHELL_XPCSHELLENVIRONMENT_H_
+#define _IPC_TESTSHELL_XPCSHELLENVIRONMENT_H_
+
+#include "base/basictypes.h"
+
+#include <string>
+#include <stdio.h>
+
+#include "nsCOMPtr.h"
+#include "nsDebug.h"
+#include "nsString.h"
+#include "nsJSPrincipals.h"
+#include "nsContentUtils.h"
+#include "js/RootingAPI.h"
+#include "js/TypeDecls.h"
+
+struct JSPrincipals;
+
+namespace mozilla {
+namespace ipc {
+
+class XPCShellEnvironment
+{
+public:
+    static XPCShellEnvironment* CreateEnvironment();
+    ~XPCShellEnvironment();
+
+    void ProcessFile(JSContext *cx, const char *filename, FILE *file, bool forceTTY);
+    bool EvaluateString(const nsString& aString,
+                        nsString* aResult = nullptr);
+
+    JSPrincipals* GetPrincipal() {
+        return nsJSPrincipals::get(nsContentUtils::GetSystemPrincipal());
+    }
+
+    JSObject* GetGlobalObject() {
+        return mGlobalHolder;
+    }
+
+    void SetIsQuitting() {
+        mQuitting = true;
+    }
+    bool IsQuitting() {
+        return mQuitting;
+    }
+
+protected:
+    XPCShellEnvironment();
+    bool Init();
+
+private:
+    JS::PersistentRooted<JSObject *> mGlobalHolder;
+
+    bool mQuitting;
+};
+
+} /* namespace ipc */
+} /* namespace mozilla */
+
+#endif /* _IPC_TESTSHELL_XPCSHELLENVIRONMENT_H_ */
diff --git a/ipc/testshell/moz.build b/ipc/testshell/moz.build
new file mode 100644
index 0000000000..c39273bdde
--- /dev/null
+++ b/ipc/testshell/moz.build
@@ -0,0 +1,37 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+EXPORTS.mozilla.ipc += [
+    'TestShellChild.h',
+    'TestShellParent.h',
+    'XPCShellEnvironment.h',
+]
+
+XPCSHELL_TESTS_MANIFESTS += ['tests/xpcshell.ini']
+
+SOURCES += [
+    'TestShellChild.cpp',
+    'TestShellParent.cpp',
+    'XPCShellEnvironment.cpp',
+]
+
+IPDL_SOURCES = [
+    'PTestShell.ipdl',
+    'PTestShellCommand.ipdl',
+]
+
+include('/ipc/chromium/chromium-config.mozbuild')
+
+FINAL_LIBRARY = 'xul'
+
+# For xpcshell error messages and nsAutoJSString
+LOCAL_INCLUDES += [
+    '/dom/base',
+    '/js/xpconnect/src',
+]
+
+if CONFIG['GNU_CXX']:
+    CXXFLAGS += ['-Wno-error=shadow']
diff --git a/ipc/testshell/tests/test_ipcshell.js b/ipc/testshell/tests/test_ipcshell.js
new file mode 100644
index 0000000000..60af07e347
--- /dev/null
+++ b/ipc/testshell/tests/test_ipcshell.js
@@ -0,0 +1,28 @@
+function callback(result) {
+  do_check_eq(result, Ci.nsIXULRuntime.PROCESS_TYPE_CONTENT);
+  do_test_finished();
+}
+
+function run_test() {
+  do_test_pending();
+
+  do_check_eq(runtime.processType, Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT);
+
+  sendCommand("load('test_ipcshell_child.js');");
+
+  sendCommand("runtime.processType;", callback);
+
+  [ [ "C", "D" ], [ "D", "C" ], [ "\u010C", "D" ], [ "D", "\u010C" ] ].forEach(
+    function (pair) {
+      do_test_pending();
+      var cmp = pair[0].localeCompare(pair[1]);
+      sendCommand(
+          "'"+ pair[0] +"'.localeCompare('"+ pair[1] +"');",
+          function (result) {
+              do_check_eq(cmp, result);
+              do_test_finished(); 
+          });
+    })
+}
+load('test_ipcshell_child.js');
+
diff --git a/ipc/testshell/tests/test_ipcshell_child.js b/ipc/testshell/tests/test_ipcshell_child.js
new file mode 100644
index 0000000000..d9c9fb6c0d
--- /dev/null
+++ b/ipc/testshell/tests/test_ipcshell_child.js
@@ -0,0 +1,9 @@
+var Cc = Components.classes;

+var Ci = Components.interfaces;

+
+const runtime = Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULRuntime);
+
+if (typeof(run_test) == "undefined") {

+  run_test = function() {
+    do_check_eq(runtime.processType, Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT);

+  }
}
diff --git a/ipc/testshell/tests/xpcshell.ini b/ipc/testshell/tests/xpcshell.ini
new file mode 100644
index 0000000000..26c22fb7b7
--- /dev/null
+++ b/ipc/testshell/tests/xpcshell.ini
@@ -0,0 +1,9 @@
+[DEFAULT]
+head = 
+tail = 
+skip-if = toolkit == 'android'
+
+[test_ipcshell.js]
+# Bug 676963: test fails consistently on Android
+fail-if = os == "android"
+[test_ipcshell_child.js]