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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /js/xpconnect/loader/mozJSLoaderUtils.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'js/xpconnect/loader/mozJSLoaderUtils.cpp')
-rw-r--r--js/xpconnect/loader/mozJSLoaderUtils.cpp85
1 files changed, 85 insertions, 0 deletions
diff --git a/js/xpconnect/loader/mozJSLoaderUtils.cpp b/js/xpconnect/loader/mozJSLoaderUtils.cpp
new file mode 100644
index 000000000..abc8aa3bb
--- /dev/null
+++ b/js/xpconnect/loader/mozJSLoaderUtils.cpp
@@ -0,0 +1,85 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set ts=8 sts=4 et sw=4 tw=99: */
+/* 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 "mozilla/scache/StartupCache.h"
+
+#include "jsapi.h"
+#include "jsfriendapi.h"
+
+#include "nsJSPrincipals.h"
+
+using namespace JS;
+using namespace mozilla::scache;
+using mozilla::UniquePtr;
+
+// We only serialize scripts with system principals. So we don't serialize the
+// principals when writing a script. Instead, when reading it back, we set the
+// principals to the system principals.
+nsresult
+ReadCachedScript(StartupCache* cache, nsACString& uri, JSContext* cx,
+ nsIPrincipal* systemPrincipal, MutableHandleScript scriptp)
+{
+ UniquePtr<char[]> buf;
+ uint32_t len;
+ nsresult rv = cache->GetBuffer(PromiseFlatCString(uri).get(), &buf, &len);
+ if (NS_FAILED(rv))
+ return rv; // don't warn since NOT_AVAILABLE is an ok error
+
+ JS::TranscodeBuffer buffer;
+ buffer.replaceRawBuffer(reinterpret_cast<uint8_t*>(buf.release()), len);
+ JS::TranscodeResult code = JS::DecodeScript(cx, buffer, scriptp);
+ if (code == JS::TranscodeResult_Ok)
+ return NS_OK;
+
+ if ((code & JS::TranscodeResult_Failure) != 0)
+ return NS_ERROR_FAILURE;
+
+ MOZ_ASSERT((code & JS::TranscodeResult_Throw) != 0);
+ JS_ClearPendingException(cx);
+ return NS_ERROR_OUT_OF_MEMORY;
+}
+
+nsresult
+ReadCachedFunction(StartupCache* cache, nsACString& uri, JSContext* cx,
+ nsIPrincipal* systemPrincipal, JSFunction** functionp)
+{
+ // This doesn't actually work ...
+ return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+nsresult
+WriteCachedScript(StartupCache* cache, nsACString& uri, JSContext* cx,
+ nsIPrincipal* systemPrincipal, HandleScript script)
+{
+ MOZ_ASSERT(JS_GetScriptPrincipals(script) == nsJSPrincipals::get(systemPrincipal));
+
+ JS::TranscodeBuffer buffer;
+ JS::TranscodeResult code = JS::EncodeScript(cx, buffer, script);
+ if (code != JS::TranscodeResult_Ok) {
+ if ((code & JS::TranscodeResult_Failure) != 0)
+ return NS_ERROR_FAILURE;
+ MOZ_ASSERT((code & JS::TranscodeResult_Throw) != 0);
+ JS_ClearPendingException(cx);
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ size_t size = buffer.length();
+ if (size > UINT32_MAX)
+ return NS_ERROR_FAILURE;
+ nsresult rv = cache->PutBuffer(PromiseFlatCString(uri).get(),
+ reinterpret_cast<char*>(buffer.begin()),
+ size);
+ return rv;
+}
+
+nsresult
+WriteCachedFunction(StartupCache* cache, nsACString& uri, JSContext* cx,
+ nsIPrincipal* systemPrincipal, JSFunction* function)
+{
+ // This doesn't actually work ...
+ return NS_ERROR_NOT_IMPLEMENTED;
+}