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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/xpconnect/loader/mozJSLoaderUtils.cpp | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/xpconnect/loader/mozJSLoaderUtils.cpp | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/js/xpconnect/loader/mozJSLoaderUtils.cpp b/js/xpconnect/loader/mozJSLoaderUtils.cpp new file mode 100644 index 0000000000..3f54e87d3b --- /dev/null +++ b/js/xpconnect/loader/mozJSLoaderUtils.cpp @@ -0,0 +1,75 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 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 "mozilla/scache/StartupCache.h" + +#include "jsapi.h" +#include "jsfriendapi.h" +#include "js/CompileOptions.h" +#include "js/Transcoding.h" +#include "js/experimental/JSStencil.h" + +#include "mozilla/BasePrincipal.h" +#include "mozilla/Span.h" + +using namespace JS; +using namespace mozilla::scache; +using mozilla::UniquePtr; + +static nsresult HandleTranscodeResult(JSContext* cx, + JS::TranscodeResult result) { + if (result == JS::TranscodeResult::Ok) { + return NS_OK; + } + + if (result == JS::TranscodeResult::Throw) { + JS_ClearPendingException(cx); + return NS_ERROR_OUT_OF_MEMORY; + } + + MOZ_ASSERT(IsTranscodeFailureResult(result)); + return NS_ERROR_FAILURE; +} + +nsresult ReadCachedStencil(StartupCache* cache, nsACString& cachePath, + JSContext* cx, const JS::DecodeOptions& options, + JS::Stencil** stencilOut) { + MOZ_ASSERT(options.borrowBuffer); + MOZ_ASSERT(!options.usePinnedBytecode); + + const char* buf; + uint32_t len; + nsresult rv = + cache->GetBuffer(PromiseFlatCString(cachePath).get(), &buf, &len); + if (NS_FAILED(rv)) { + return rv; // don't warn since NOT_AVAILABLE is an ok error + } + + JS::TranscodeRange range(AsBytes(mozilla::Span(buf, len))); + JS::TranscodeResult code = JS::DecodeStencil(cx, options, range, stencilOut); + return HandleTranscodeResult(cx, code); +} + +nsresult WriteCachedStencil(StartupCache* cache, nsACString& cachePath, + JSContext* cx, JS::Stencil* stencil) { + JS::TranscodeBuffer buffer; + JS::TranscodeResult code = JS::EncodeStencil(cx, stencil, buffer); + if (code != JS::TranscodeResult::Ok) { + return HandleTranscodeResult(cx, code); + } + + size_t size = buffer.length(); + if (size > UINT32_MAX) { + return NS_ERROR_FAILURE; + } + + // Move the vector buffer into a unique pointer buffer. + mozilla::UniqueFreePtr<char[]> buf( + reinterpret_cast<char*>(buffer.extractOrCopyRawBuffer())); + nsresult rv = cache->PutBuffer(PromiseFlatCString(cachePath).get(), + std::move(buf), size); + return rv; +} |