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-rw-r--r--startupcache/StartupCacheUtils.cpp225
1 files changed, 225 insertions, 0 deletions
diff --git a/startupcache/StartupCacheUtils.cpp b/startupcache/StartupCacheUtils.cpp
new file mode 100644
index 0000000000..c8dcdd7f11
--- /dev/null
+++ b/startupcache/StartupCacheUtils.cpp
@@ -0,0 +1,225 @@
+/* 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 "nsCOMPtr.h"
+#include "nsIInputStream.h"
+#include "nsNetUtil.h"
+#include "nsIFileURL.h"
+#include "nsIJARURI.h"
+#include "nsIResProtocolHandler.h"
+#include "nsIChromeRegistry.h"
+#include "nsStringStream.h"
+#include "StartupCacheUtils.h"
+#include "mozilla/scache/StartupCache.h"
+#include "mozilla/Omnijar.h"
+
+namespace mozilla {
+namespace scache {
+
+nsresult NewObjectInputStreamFromBuffer(const char* buffer, uint32_t len,
+ nsIObjectInputStream** stream) {
+ nsCOMPtr<nsIInputStream> stringStream;
+ nsresult rv = NS_NewByteInputStream(getter_AddRefs(stringStream),
+ Span(buffer, len), NS_ASSIGNMENT_DEPEND);
+ MOZ_ALWAYS_SUCCEEDS(rv);
+
+ nsCOMPtr<nsIObjectInputStream> objectInput =
+ NS_NewObjectInputStream(stringStream);
+
+ objectInput.forget(stream);
+ return NS_OK;
+}
+
+nsresult NewObjectOutputWrappedStorageStream(
+ nsIObjectOutputStream** wrapperStream, nsIStorageStream** stream,
+ bool wantDebugStream) {
+ nsCOMPtr<nsIStorageStream> storageStream;
+
+ nsresult rv =
+ NS_NewStorageStream(256, UINT32_MAX, getter_AddRefs(storageStream));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsCOMPtr<nsIOutputStream> outputStream = do_QueryInterface(storageStream);
+
+ nsCOMPtr<nsIObjectOutputStream> objectOutput =
+ NS_NewObjectOutputStream(outputStream);
+
+#ifdef DEBUG
+ if (wantDebugStream) {
+ // Wrap in debug stream to detect unsupported writes of
+ // multiply-referenced non-singleton objects
+ StartupCache* sc = StartupCache::GetSingleton();
+ NS_ENSURE_TRUE(sc, NS_ERROR_UNEXPECTED);
+ nsCOMPtr<nsIObjectOutputStream> debugStream;
+ sc->GetDebugObjectOutputStream(objectOutput, getter_AddRefs(debugStream));
+ debugStream.forget(wrapperStream);
+ } else {
+ objectOutput.forget(wrapperStream);
+ }
+#else
+ objectOutput.forget(wrapperStream);
+#endif
+
+ storageStream.forget(stream);
+ return NS_OK;
+}
+
+nsresult NewBufferFromStorageStream(nsIStorageStream* storageStream,
+ UniqueFreePtr<char[]>* buffer,
+ uint32_t* len) {
+ nsresult rv;
+ nsCOMPtr<nsIInputStream> inputStream;
+ rv = storageStream->NewInputStream(0, getter_AddRefs(inputStream));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ uint64_t avail64;
+ rv = inputStream->Available(&avail64);
+ NS_ENSURE_SUCCESS(rv, rv);
+ NS_ENSURE_TRUE(avail64 <= UINT32_MAX, NS_ERROR_FILE_TOO_BIG);
+
+ uint32_t avail = (uint32_t)avail64;
+ auto temp = UniqueFreePtr<char[]>(
+ reinterpret_cast<char*>(malloc(sizeof(char) * avail)));
+ uint32_t read;
+ rv = inputStream->Read(temp.get(), avail, &read);
+ if (NS_SUCCEEDED(rv) && avail != read) rv = NS_ERROR_UNEXPECTED;
+
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ *len = avail;
+ *buffer = std::move(temp);
+ return NS_OK;
+}
+
+static const char baseName[2][5] = {"gre/", "app/"};
+
+static inline bool canonicalizeBase(nsAutoCString& spec, nsACString& out) {
+ nsAutoCString greBase, appBase;
+ nsresult rv = mozilla::Omnijar::GetURIString(mozilla::Omnijar::GRE, greBase);
+ if (NS_FAILED(rv) || !greBase.Length()) return false;
+
+ rv = mozilla::Omnijar::GetURIString(mozilla::Omnijar::APP, appBase);
+ if (NS_FAILED(rv)) return false;
+
+ bool underGre = StringBeginsWith(spec, greBase);
+ bool underApp = appBase.Length() && StringBeginsWith(spec, appBase);
+
+ if (!underGre && !underApp) return false;
+
+ /**
+ * At this point, if both underGre and underApp are true, it can be one
+ * of the two following cases:
+ * - the GRE directory points to a subdirectory of the APP directory,
+ * meaning spec points under GRE.
+ * - the APP directory points to a subdirectory of the GRE directory,
+ * meaning spec points under APP.
+ * Checking the GRE and APP path length is enough to know in which case
+ * we are.
+ */
+ if (underGre && underApp && greBase.Length() < appBase.Length())
+ underGre = false;
+
+ out.AppendLiteral("/resource/");
+ out.Append(
+ baseName[underGre ? mozilla::Omnijar::GRE : mozilla::Omnijar::APP]);
+ out.Append(Substring(spec, underGre ? greBase.Length() : appBase.Length()));
+ return true;
+}
+
+/**
+ * ResolveURI transforms a chrome: or resource: URI into the URI for its
+ * underlying resource, or returns any other URI unchanged.
+ */
+nsresult ResolveURI(nsIURI* in, nsIURI** out) {
+ nsresult rv;
+
+ // Resolve resource:// URIs. At the end of this if/else block, we
+ // have both spec and uri variables identifying the same URI.
+ if (in->SchemeIs("resource")) {
+ nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsCOMPtr<nsIProtocolHandler> ph;
+ rv = ioService->GetProtocolHandler("resource", getter_AddRefs(ph));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsCOMPtr<nsIResProtocolHandler> irph(do_QueryInterface(ph, &rv));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsAutoCString spec;
+ rv = irph->ResolveURI(in, spec);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ return ioService->NewURI(spec, nullptr, nullptr, out);
+ }
+ if (in->SchemeIs("chrome")) {
+ nsCOMPtr<nsIChromeRegistry> chromeReg =
+ mozilla::services::GetChromeRegistry();
+ if (!chromeReg) return NS_ERROR_UNEXPECTED;
+
+ return chromeReg->ConvertChromeURL(in, out);
+ }
+
+ *out = do_AddRef(in).take();
+ return NS_OK;
+}
+
+static nsresult PathifyURIImpl(nsIURI* in, nsACString& out) {
+ nsCOMPtr<nsIURI> uri;
+ nsresult rv = ResolveURI(in, getter_AddRefs(uri));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsAutoCString spec;
+ rv = uri->GetSpec(spec);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ if (!canonicalizeBase(spec, out)) {
+ if (uri->SchemeIs("file")) {
+ nsCOMPtr<nsIFileURL> baseFileURL;
+ baseFileURL = do_QueryInterface(uri, &rv);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsAutoCString path;
+ rv = baseFileURL->GetPathQueryRef(path);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ out.Append(path);
+ } else if (uri->SchemeIs("jar")) {
+ nsCOMPtr<nsIJARURI> jarURI = do_QueryInterface(uri, &rv);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsCOMPtr<nsIURI> jarFileURI;
+ rv = jarURI->GetJARFile(getter_AddRefs(jarFileURI));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ rv = PathifyURIImpl(jarFileURI, out);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsAutoCString path;
+ rv = jarURI->GetJAREntry(path);
+ NS_ENSURE_SUCCESS(rv, rv);
+ out.Append('/');
+ out.Append(path);
+ } else { // Very unlikely
+ rv = uri->GetSpec(spec);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ out.Append('/');
+ out.Append(spec);
+ }
+ }
+ return NS_OK;
+}
+
+nsresult PathifyURI(const char* loaderType, size_t loaderTypeLength, nsIURI* in,
+ nsACString& out) {
+ out.AssignASCII(loaderType, loaderTypeLength);
+
+ return PathifyURIImpl(in, out);
+}
+
+} // namespace scache
+} // namespace mozilla