Backed out changeset a4b0052954d2 (bug 1279699) for causing various crash regressions.

--HG--
extra : rebase_source : bf9223381149f34a7b3513eda05fe197ae2db876

gfx/2d/DrawEventRecorder.cpp

@@ -36,8 +36,7 @@ DrawEventRecorderPrivate::RecordEvent(const RecordedEvent &aEvent)
 }
 
 DrawEventRecorderFile::DrawEventRecorderFile(const char *aFilename)
-  : DrawEventRecorderPrivate(nullptr)
-  , mOutputFilename(aFilename)
+  : DrawEventRecorderPrivate(nullptr) 
   , mOutputFile(aFilename, ofstream::binary)
 {
   mOutputStream = &mOutputFile;
@@ -56,25 +55,6 @@ DrawEventRecorderFile::Flush()
   mOutputFile.flush();
 }
 
-void
-DrawEventRecorderFile::OpenAndTruncate()
-{
-  if (mOutputFile.is_open()) {
-    return;
-  }
-
-  mOutputFile.open(mOutputFilename.c_str(), ofstream::binary | ofstream::trunc);
-  WriteHeader();
-}
-
-void
-DrawEventRecorderFile::Close()
-{
-  MOZ_ASSERT(mOutputFile.is_open());
-
-  mOutputFile.close();
-}
-
 DrawEventRecorderMemory::DrawEventRecorderMemory()
   : DrawEventRecorderPrivate(nullptr)
 {

gfx/2d/DrawEventRecorder.h

@@ -10,7 +10,6 @@
 #include "RecordedEvent.h"
 #include <ostream>
 #include <fstream>
-#include <string>
 
 #if defined(_MSC_VER)
 #include <unordered_set>
@@ -79,24 +78,9 @@ public:
   explicit DrawEventRecorderFile(const char *aFilename);
   ~DrawEventRecorderFile();
 
-  /**
-   * Re-opens and truncates the file. The recorder does NOT forget which objects
-   * it has recorded. This can be used with Close, so that a recording can be
-   * processed in chunks. If the file is already open this does nothing.
-   */
-  void OpenAndTruncate();
-
-  /**
-   * Closes the file so that it can be processed. The recorder does NOT forget
-   * which objects it has recorded. This can be used with OpenAndTruncate, so
-   * that a recording can be processed in chunks. The file must be open.
-   */
-  void Close();
-
 private:
   virtual void Flush();
 
-  std::string mOutputFilename;
   std::ofstream mOutputFile;
 };
 

layout/printing/ipc/PRemotePrintJob.ipdl

@@ -24,7 +24,8 @@ parent:
 
   // Translate the stored page recording and play back the events to the real
   // print device.
-  async ProcessPage(nsCString aPageFileName);
+  // This will always deallocate the shared memory.
+  async ProcessPage(Shmem aStoredPage);
 
   // This informs the real print device that we've finished, so it can trigger
   // the actual print.

layout/printing/ipc/RemotePrintJobChild.cpp

@@ -47,12 +47,12 @@ RemotePrintJobChild::RecvPrintInitializationResult(const nsresult& aRv)
 }
 
 void
-RemotePrintJobChild::ProcessPage(const nsCString& aPageFileName)
+RemotePrintJobChild::ProcessPage(Shmem& aStoredPage)
 {
   MOZ_ASSERT(mPagePrintTimer);
 
   mPagePrintTimer->WaitForRemotePrint();
-  Unused << SendProcessPage(aPageFileName);
+  Unused << SendProcessPage(aStoredPage);
 }
 
 mozilla::ipc::IPCResult

layout/printing/ipc/RemotePrintJobChild.h

@@ -36,7 +36,7 @@ public:
 
   mozilla::ipc::IPCResult RecvPrintInitializationResult(const nsresult& aRv) final;
 
-  void ProcessPage(const nsCString& aPageFileName);
+  void ProcessPage(Shmem& aStoredPage);
 
   mozilla::ipc::IPCResult RecvPageProcessed() final;
 

layout/printing/ipc/RemotePrintJobParent.cpp

@@ -6,14 +6,12 @@
 
 #include "RemotePrintJobParent.h"
 
-#include <fstream>
+#include <istream>
 
 #include "gfxContext.h"
 #include "mozilla/Attributes.h"
 #include "mozilla/Unused.h"
-#include "nsAppDirectoryServiceDefs.h"
 #include "nsComponentManagerUtils.h"
-#include "nsDirectoryServiceUtils.h"
 #include "nsDeviceContext.h"
 #include "nsIDeviceContextSpec.h"
 #include "nsIPrintSettings.h"
@@ -83,9 +81,15 @@ RemotePrintJobParent::InitializePrintDevice(const nsString& aDocumentTitle,
 }
 
 mozilla::ipc::IPCResult
-RemotePrintJobParent::RecvProcessPage(const nsCString& aPageFileName)
+RemotePrintJobParent::RecvProcessPage(Shmem&& aStoredPage)
 {
-  nsresult rv = PrintPage(aPageFileName);
+  nsresult rv = PrintPage(aStoredPage);
+
+  // Always deallocate the shared memory no matter what the result.
+  if (!DeallocShmem(aStoredPage)) {
+    NS_WARNING("Failed to deallocated shared memory, remote print will abort.");
+    rv = NS_ERROR_FAILURE;
+  }
 
   if (NS_FAILED(rv)) {
     Unused << SendAbortPrint(rv);
@@ -97,7 +101,7 @@ RemotePrintJobParent::RecvProcessPage(const nsCString& aPageFileName)
 }
 
 nsresult
-RemotePrintJobParent::PrintPage(const nsCString& aPageFileName)
+RemotePrintJobParent::PrintPage(const Shmem& aStoredPage)
 {
   MOZ_ASSERT(mPrintDeviceContext);
 
@@ -106,25 +110,8 @@ RemotePrintJobParent::PrintPage(const nsCString& aPageFileName)
     return rv;
   }
 
-  nsCOMPtr<nsIFile> recordingFile;
-  rv = NS_GetSpecialDirectory(NS_APP_CONTENT_PROCESS_TEMP_DIR,
-                              getter_AddRefs(recordingFile));
-  if (NS_WARN_IF(NS_FAILED(rv))) {
-    return rv;
-  }
-
-  rv = recordingFile->AppendNative(aPageFileName);
-  if (NS_WARN_IF(NS_FAILED(rv))) {
-    return rv;
-  }
-
-  nsAutoCString recordingPath;
-  rv = recordingFile->GetNativePath(recordingPath);
-  if (NS_WARN_IF(NS_FAILED(rv))) {
-    return rv;
-  }
-
-  std::ifstream recording(recordingPath.get(), std::ifstream::binary);
+  std::istringstream recording(std::string(aStoredPage.get<char>(),
+                                           aStoredPage.Size<char>()));
   if (!mPrintTranslator->TranslateRecording(recording)) {
     return NS_ERROR_FAILURE;
   }
@@ -134,12 +121,6 @@ RemotePrintJobParent::PrintPage(const nsCString& aPageFileName)
     return rv;
   }
 
-  recording.close();
-  rv = recordingFile->Remove(/* recursive= */ false);
-  if (NS_WARN_IF(NS_FAILED(rv))) {
-    return rv;
-  }
-
   return NS_OK;
 }
 

layout/printing/ipc/RemotePrintJobParent.h

@@ -34,7 +34,7 @@ public:
                                               const int32_t& aStartPage,
                                               const int32_t& aEndPage) final;
 
-  mozilla::ipc::IPCResult RecvProcessPage(const nsCString& aPageFileName) final;
+  mozilla::ipc::IPCResult RecvProcessPage(Shmem&& aStoredPage) final;
 
   mozilla::ipc::IPCResult RecvFinalizePrint() final;
 
@@ -70,7 +70,7 @@ private:
                                  const int32_t& aStartPage,
                                  const int32_t& aEndPage);
 
-  nsresult PrintPage(const nsCString& aPageFileName);
+  nsresult PrintPage(const Shmem& aStoredPage);
 
   nsCOMPtr<nsIPrintSettings> mPrintSettings;
   RefPtr<nsDeviceContext> mPrintDeviceContext;

widget/nsDeviceContextSpecProxy.cpp

@@ -14,11 +14,8 @@
 #include "mozilla/RefPtr.h"
 #include "mozilla/Unused.h"
 #include "nsComponentManagerUtils.h"
-#include "nsAppDirectoryServiceDefs.h"
-#include "nsDirectoryServiceUtils.h"
 #include "nsIPrintSession.h"
 #include "nsIPrintSettings.h"
-#include "nsIUUIDGenerator.h"
 
 using mozilla::Unused;
 
@@ -137,37 +134,7 @@ nsDeviceContextSpecProxy::BeginDocument(const nsAString& aTitle,
                                         const nsAString& aPrintToFileName,
                                         int32_t aStartPage, int32_t aEndPage)
 {
-  nsCOMPtr<nsIFile> recordingFile;
-  nsresult rv = NS_GetSpecialDirectory(NS_APP_CONTENT_PROCESS_TEMP_DIR,
-                                       getter_AddRefs(recordingFile));
-  if (NS_WARN_IF(NS_FAILED(rv))) {
-    return rv;
-  }
-
-  nsCOMPtr<nsIUUIDGenerator> uuidgen =
-    do_GetService("@mozilla.org/uuid-generator;1", &rv);
-  if (NS_WARN_IF(NS_FAILED(rv))) {
-    return rv;
-  }
-
-  nsID uuid;
-  rv = uuidgen->GenerateUUIDInPlace(&uuid);
-  if (NS_WARN_IF(NS_FAILED(rv))) {
-    return rv;
-  }
-
-  char uuidChars[NSID_LENGTH];
-  uuid.ToProvidedString(uuidChars);
-  mRecorderFile.AssignASCII(uuidChars);
-  rv = recordingFile->AppendNative(mRecorderFile);
-  if (NS_WARN_IF(NS_FAILED(rv))) {
-    return rv;
-  }
-
-  nsAutoCString recordingPath;
-  rv = recordingFile->GetNativePath(recordingPath);
-
-  mRecorder = new mozilla::gfx::DrawEventRecorderFile(recordingPath.get());
+  mRecorder = new mozilla::gfx::DrawEventRecorderMemory();
   return mRemotePrintJob->InitializePrint(nsString(aTitle),
                                           nsString(aPrintToFileName),
                                           aStartPage, aEndPage);
@@ -190,18 +157,34 @@ nsDeviceContextSpecProxy::AbortDocument()
 NS_IMETHODIMP
 nsDeviceContextSpecProxy::BeginPage()
 {
-  // Reopen the file, if necessary, ready for the next page.
-  mRecorder->OpenAndTruncate();
-
   return NS_OK;
 }
 
 NS_IMETHODIMP
 nsDeviceContextSpecProxy::EndPage()
 {
+  // Save the current page recording to shared memory.
+  mozilla::ipc::Shmem storedPage;
+  size_t recordingSize = mRecorder->RecordingSize();
+  if (!mRemotePrintJob->AllocShmem(recordingSize,
+                                   mozilla::ipc::SharedMemory::TYPE_BASIC,
+                                   &storedPage)) {
+    NS_WARNING("Failed to create shared memory for remote printing.");
+    return NS_ERROR_FAILURE;
+  }
+
+  bool success = mRecorder->CopyRecording(storedPage.get<char>(), recordingSize);
+  if (!success) {
+    NS_WARNING("Copying recording to shared memory was not succesful.");
+    return NS_ERROR_FAILURE;
+  }
+
+  // Wipe the recording to free memory. The recorder does not forget which data
+  // backed objects that it has stored.
+  mRecorder->WipeRecording();
+
   // Send the page recording to the parent.
-  mRecorder->Close();
-  mRemotePrintJob->ProcessPage(mRecorderFile);
+  mRemotePrintJob->ProcessPage(storedPage);
 
   return NS_OK;
 }

widget/nsDeviceContextSpecProxy.h

@@ -9,13 +9,12 @@
 
 #include "nsIDeviceContextSpec.h"
 #include "nsCOMPtr.h"
-#include "nsString.h"
 
 class nsIPrintSession;
 
 namespace mozilla {
 namespace gfx {
-class DrawEventRecorderFile;
+class DrawEventRecorderMemory;
 }
 
 namespace layout {
@@ -58,8 +57,7 @@ private:
   nsCOMPtr<nsIPrintSession> mPrintSession;
   nsCOMPtr<nsIDeviceContextSpec> mRealDeviceContextSpec;
   RefPtr<mozilla::layout::RemotePrintJobChild> mRemotePrintJob;
-  RefPtr<mozilla::gfx::DrawEventRecorderFile> mRecorder;
-  nsCString mRecorderFile;
+  RefPtr<mozilla::gfx::DrawEventRecorderMemory> mRecorder;
 };
 
 #endif // nsDeviceContextSpecProxy_h

xpcom/io/nsAppDirectoryServiceDefs.h

@@ -110,9 +110,6 @@
 // NS_APP_CONTENT_PROCESS_TEMP_DIR, but that should not be relied upon.
 //
 #define NS_APP_CONTENT_PROCESS_TEMP_DIR         "ContentTmpD"
-#else
-// Otherwise NS_APP_CONTENT_PROCESS_TEMP_DIR must match NS_OS_TEMP_DIR.
-#define NS_APP_CONTENT_PROCESS_TEMP_DIR         "TmpD"
 #endif // (defined(XP_WIN) || defined(XP_MACOSX)) && defined(MOZ_CONTENT_SANDBOX)
 
 #endif // nsAppDirectoryServiceDefs_h___