Bug 1126593 - Add a global fallible instance, so that using fallible works directly, everywhere. r=njn

--HG--
rename : memory/mozalloc/fallible.h => memory/fallible/fallible.h

build/gecko_templates.mozbuild

@@ -78,6 +78,11 @@ def GeckoBinary(linkage='dependent', msvcrt='dynamic', mozglue=None):
             else:
                 error('`mozglue` must be "program" or "library"')
 
+    if not CONFIG['JS_STANDALONE']:
+        USE_LIBS += [
+            'fallible',
+        ]
+
 
 @template
 def GeckoProgram(name, linkage='standalone', **kwargs):

dom/base/DOMParser.cpp

@@ -109,7 +109,7 @@ DOMParser::ParseFromString(const nsAString& str,
 
   nsAutoCString utf8str;
   // Convert from UTF16 to UTF8 using fallible allocations
-  if (!AppendUTF16toUTF8(str, utf8str, mozilla::fallible_t())) {
+  if (!AppendUTF16toUTF8(str, utf8str, mozilla::fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
 

dom/base/FragmentOrElement.cpp

@@ -2202,7 +2202,7 @@ public:
 
   bool ToString(nsAString& aOut)
   {
-    if (!aOut.SetCapacity(mLength, fallible_t())) {
+    if (!aOut.SetCapacity(mLength, fallible)) {
       return false;
     }
 

dom/base/URLSearchParams.cpp

@@ -190,7 +190,7 @@ URLSearchParams::ConvertString(const nsACString& aInput, nsAString& aOutput)
     return;
   }
 
-  if (!aOutput.SetLength(outputLength, fallible_t())) {
+  if (!aOutput.SetLength(outputLength, fallible)) {
     return;
   }
 

dom/base/nsContentUtils.cpp

@@ -732,7 +732,7 @@ nsContentUtils::Atob(const nsAString& aAsciiBase64String,
   const char16_t* start = aAsciiBase64String.BeginReading();
   const char16_t* end = aAsciiBase64String.EndReading();
   nsString trimmedString;
-  if (!trimmedString.SetCapacity(aAsciiBase64String.Length(), fallible_t())) {
+  if (!trimmedString.SetCapacity(aAsciiBase64String.Length(), fallible)) {
     return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
   }
   while (start < end) {
@@ -4425,20 +4425,20 @@ nsContentUtils::SetNodeTextContent(nsIContent* aContent,
 
 static bool
 AppendNodeTextContentsRecurse(nsINode* aNode, nsAString& aResult,
-                              const mozilla::fallible_t&)
+                              const fallible_t& aFallible)
 {
   for (nsIContent* child = aNode->GetFirstChild();
        child;
        child = child->GetNextSibling()) {
     if (child->IsElement()) {
       bool ok = AppendNodeTextContentsRecurse(child, aResult,
-                                              mozilla::fallible_t());
+                                              aFallible);
       if (!ok) {
         return false;
       }
     }
     else if (child->IsNodeOfType(nsINode::eTEXT)) {
-      bool ok = child->AppendTextTo(aResult, mozilla::fallible_t());
+      bool ok = child->AppendTextTo(aResult, aFallible);
       if (!ok) {
         return false;
       }
@@ -4452,21 +4452,21 @@ AppendNodeTextContentsRecurse(nsINode* aNode, nsAString& aResult,
 bool
 nsContentUtils::AppendNodeTextContent(nsINode* aNode, bool aDeep,
                                       nsAString& aResult,
-                                      const mozilla::fallible_t&)
+                                      const fallible_t& aFallible)
 {
   if (aNode->IsNodeOfType(nsINode::eTEXT)) {
     return static_cast<nsIContent*>(aNode)->AppendTextTo(aResult,
-                                                         mozilla::fallible_t());
+                                                         aFallible);
   }
   else if (aDeep) {
-    return AppendNodeTextContentsRecurse(aNode, aResult, mozilla::fallible_t());
+    return AppendNodeTextContentsRecurse(aNode, aResult, aFallible);
   }
   else {
     for (nsIContent* child = aNode->GetFirstChild();
          child;
          child = child->GetNextSibling()) {
       if (child->IsNodeOfType(nsINode::eTEXT)) {
-        bool ok = child->AppendTextTo(aResult, mozilla::fallible_t());
+        bool ok = child->AppendTextTo(aResult, fallible);
         if (!ok) {
             return false;
         }
@@ -6242,7 +6242,7 @@ void nsContentUtils::RemoveNewlines(nsString &aString)
 void
 nsContentUtils::PlatformToDOMLineBreaks(nsString &aString)
 {
-  if (!PlatformToDOMLineBreaks(aString, mozilla::fallible_t())) {
+  if (!PlatformToDOMLineBreaks(aString, fallible)) {
     aString.AllocFailed(aString.Length());
   }
 }
@@ -6962,7 +6962,7 @@ bool
 nsContentUtils::GetNodeTextContent(nsINode* aNode, bool aDeep, nsAString& aResult)
 {
   aResult.Truncate();
-  return AppendNodeTextContent(aNode, aDeep, aResult, mozilla::fallible_t());
+  return AppendNodeTextContent(aNode, aDeep, aResult, fallible);
 }
 
 void

dom/base/nsDOMFileReader.cpp

@@ -348,7 +348,7 @@ nsDOMFileReader::DoReadData(nsIAsyncInputStream* aStream, uint64_t aCount)
     if (uint64_t(oldLen) + aCount > UINT32_MAX)
       return NS_ERROR_OUT_OF_MEMORY;
     char16_t *buf = nullptr;
-    mResult.GetMutableData(&buf, oldLen + aCount, fallible_t());
+    mResult.GetMutableData(&buf, oldLen + aCount, fallible);
     NS_ENSURE_TRUE(buf, NS_ERROR_OUT_OF_MEMORY);
 
     uint32_t bytesRead = 0;
@@ -522,7 +522,7 @@ nsDOMFileReader::GetAsDataURL(nsIDOMBlob *aFile,
   rv = Base64Encode(Substring(aFileData, aDataLen), encodedData);
   NS_ENSURE_SUCCESS(rv, rv);
 
-  if (!AppendASCIItoUTF16(encodedData, aResult, fallible_t())) {
+  if (!AppendASCIItoUTF16(encodedData, aResult, fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
 

dom/base/nsDocumentEncoder.cpp

@@ -572,7 +572,7 @@ ConvertAndWrite(const nsAString& aString,
   }
 
   nsAutoCString charXferString;
-  if (!charXferString.SetLength(charLength, fallible_t()))
+  if (!charXferString.SetLength(charLength, fallible))
     return NS_ERROR_OUT_OF_MEMORY;
 
   char* charXferBuf = charXferString.BeginWriting();

dom/base/nsGenericDOMDataNode.cpp

@@ -1074,9 +1074,10 @@ nsGenericDOMDataNode::AppendTextTo(nsAString& aResult)
 }
 
 bool
-nsGenericDOMDataNode::AppendTextTo(nsAString& aResult, const mozilla::fallible_t&)
+nsGenericDOMDataNode::AppendTextTo(nsAString& aResult,
+                                   const mozilla::fallible_t& aFallible)
 {
-  return mText.AppendTo(aResult, mozilla::fallible_t());
+  return mText.AppendTo(aResult, aFallible);
 }
 
 already_AddRefed<nsIAtom>

dom/base/nsJSEnvironment.cpp

@@ -2773,7 +2773,6 @@ nsJSArgArray::nsJSArgArray(JSContext *aContext, uint32_t argc, JS::Value *argv,
   // copy the array - we don't know its lifetime, and ours is tied to xpcom
   // refcounting.
   if (argc) {
-    static const fallible_t fallible = fallible_t();
     mArgv = new (fallible) JS::Heap<JS::Value>[argc];
     if (!mArgv) {
       *prv = NS_ERROR_OUT_OF_MEMORY;

dom/base/nsJSUtils.h

@@ -161,7 +161,7 @@ AssignJSString(JSContext *cx, T &dest, JSString *s)
   size_t len = js::GetStringLength(s);
   static_assert(js::MaxStringLength < (1 << 28),
                 "Shouldn't overflow here or in SetCapacity");
-  if (MOZ_UNLIKELY(!dest.SetLength(len, mozilla::fallible_t()))) {
+  if (MOZ_UNLIKELY(!dest.SetLength(len, mozilla::fallible))) {
     JS_ReportOutOfMemory(cx);
     return false;
   }

dom/base/nsScriptNameSpaceManager.cpp

@@ -328,13 +328,13 @@ nsScriptNameSpaceManager::Init()
 
   mIsInitialized = PL_DHashTableInit(&mGlobalNames, &hash_table_ops,
                                      sizeof(GlobalNameMapEntry),
-                                     fallible_t(),
+                                     fallible,
                                      GLOBALNAME_HASHTABLE_INITIAL_LENGTH);
   NS_ENSURE_TRUE(mIsInitialized, NS_ERROR_OUT_OF_MEMORY);
 
   mIsInitialized = PL_DHashTableInit(&mNavigatorNames, &hash_table_ops,
                                      sizeof(GlobalNameMapEntry),
-                                     fallible_t(),
+                                     fallible,
                                      GLOBALNAME_HASHTABLE_INITIAL_LENGTH);
   if (!mIsInitialized) {
     PL_DHashTableFinish(&mGlobalNames);

dom/base/nsTextFragment.h

@@ -125,7 +125,7 @@ public:
    * Append the contents of this string fragment to aString
    */
   void AppendTo(nsAString& aString) const {
-    if (!AppendTo(aString, mozilla::fallible_t())) {
+    if (!AppendTo(aString, mozilla::fallible)) {
       aString.AllocFailed(aString.Length() + GetLength());
     }
   }
@@ -135,9 +135,9 @@ public:
    * @return false if an out of memory condition is detected, true otherwise
    */
   bool AppendTo(nsAString& aString,
-                const mozilla::fallible_t&) const NS_WARN_UNUSED_RESULT {
+                const mozilla::fallible_t& aFallible) const NS_WARN_UNUSED_RESULT {
     if (mState.mIs2b) {
-      bool ok = aString.Append(m2b, mState.mLength, mozilla::fallible_t());
+      bool ok = aString.Append(m2b, mState.mLength, aFallible);
       if (!ok) {
         return false;
       }
@@ -145,7 +145,7 @@ public:
       return true;
     } else {
       return AppendASCIItoUTF16(Substring(m1b, mState.mLength), aString,
-                                mozilla::fallible_t());
+                                aFallible);
     }
   }
 
@@ -155,7 +155,7 @@ public:
    * @param aLength the length of the substring
    */
   void AppendTo(nsAString& aString, int32_t aOffset, int32_t aLength) const {
-    if (!AppendTo(aString, aOffset, aLength, mozilla::fallible_t())) {
+    if (!AppendTo(aString, aOffset, aLength, mozilla::fallible)) {
       aString.AllocFailed(aString.Length() + aLength);
     }
   }
@@ -168,10 +168,10 @@ public:
    * @return false if an out of memory condition is detected, true otherwise
    */
   bool AppendTo(nsAString& aString, int32_t aOffset, int32_t aLength,
-                const mozilla::fallible_t&) const NS_WARN_UNUSED_RESULT
+                const mozilla::fallible_t& aFallible) const NS_WARN_UNUSED_RESULT
   {
     if (mState.mIs2b) {
-      bool ok = aString.Append(m2b + aOffset, aLength, mozilla::fallible_t());
+      bool ok = aString.Append(m2b + aOffset, aLength, aFallible);
       if (!ok) {
         return false;
       }
@@ -179,7 +179,7 @@ public:
       return true;
     } else {
       return AppendASCIItoUTF16(Substring(m1b + aOffset, aLength), aString,
-                                mozilla::fallible_t());
+                                aFallible);
     }
   }
 

dom/base/nsXMLHttpRequest.cpp

@@ -670,7 +670,7 @@ nsXMLHttpRequest::AppendToResponseText(const char * aSrcBuffer,
                                        &destBufferLen);
   NS_ENSURE_SUCCESS(rv, rv);
 
-  if (!mResponseText.SetCapacity(mResponseText.Length() + destBufferLen, fallible_t())) {
+  if (!mResponseText.SetCapacity(mResponseText.Length() + destBufferLen, fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
 

dom/bindings/MozMap.h

@@ -102,9 +102,7 @@ public:
 
   DataType* AddEntry(const nsAString& aKey) NS_WARN_UNUSED_RESULT
   {
-    // XXXbz can't just use fallible_t() because our superclass has a
+    EntryType* ent = this->PutEntry(aKey, fallible);
-    // private typedef by that name.
-    EntryType* ent = this->PutEntry(aKey, mozilla::fallible_t());
     if (!ent) {
       return nullptr;
     }

dom/canvas/WebGLContext.cpp

@@ -1060,7 +1060,6 @@ WebGLContext::GetImageBuffer(uint8_t** out_imageBuffer, int32_t* out_format)
     if (!dataSurface->Map(DataSourceSurface::MapType::READ, &map))
         return;
 
-    static const fallible_t fallible = fallible_t();
     uint8_t* imageBuffer = new (fallible) uint8_t[mWidth * mHeight * 4];
     if (!imageBuffer) {
         dataSurface->Unmap();

dom/canvas/WebGLContextDraw.cpp

@@ -581,7 +581,7 @@ WebGLContext::DoFakeVertexAttrib0(GLuint vertexCount)
         GetAndFlushUnderlyingGLErrors();
 
         if (mFakeVertexAttrib0BufferStatus == WebGLVertexAttrib0Status::EmulatedInitializedArray) {
-            UniquePtr<GLfloat[]> array(new ((fallible_t())) GLfloat[4 * vertexCount]);
+            UniquePtr<GLfloat[]> array(new (fallible) GLfloat[4 * vertexCount]);
             if (!array) {
                 ErrorOutOfMemory("Fake attrib0 array.");
                 return false;

dom/canvas/WebGLContextGL.cpp

@@ -48,7 +48,6 @@
 #include "mozilla/dom/ImageData.h"
 #include "mozilla/dom/ToJSValue.h"
 #include "mozilla/Endian.h"
-#include "mozilla/fallible.h"
 
 using namespace mozilla;
 using namespace mozilla::dom;
@@ -2086,7 +2085,7 @@ WebGLContext::ReadPixels(GLint x, GLint y, GLsizei width,
         uint32_t subrect_byteLength = (subrect_height-1)*subrect_alignedRowSize + subrect_plainRowSize;
 
         // create subrect buffer, call glReadPixels, copy pixels into destination buffer, delete subrect buffer
-        UniquePtr<GLubyte> subrect_data(new ((fallible_t())) GLubyte[subrect_byteLength]);
+        UniquePtr<GLubyte> subrect_data(new (fallible) GLubyte[subrect_byteLength]);
         if (!subrect_data)
             return ErrorOutOfMemory("readPixels: subrect_data");
 
@@ -3203,7 +3202,7 @@ WebGLContext::TexImage2D_base(TexImageTarget texImageTarget, GLint level,
         else
         {
             size_t convertedDataSize = height * dstStride;
-            convertedData = new ((fallible_t())) uint8_t[convertedDataSize];
+            convertedData = new (fallible) uint8_t[convertedDataSize];
             if (!convertedData) {
                 ErrorOutOfMemory("texImage2D: Ran out of memory when allocating"
                                  " a buffer for doing format conversion.");
@@ -3404,7 +3403,7 @@ WebGLContext::TexSubImage2D_base(TexImageTarget texImageTarget, GLint level,
 
     if (!noConversion) {
         size_t convertedDataSize = height * dstStride;
-        convertedData = new ((fallible_t())) uint8_t[convertedDataSize];
+        convertedData = new (fallible) uint8_t[convertedDataSize];
         if (!convertedData) {
             ErrorOutOfMemory("texImage2D: Ran out of memory when allocating"
                              " a buffer for doing format conversion.");

dom/encoding/TextDecoder.cpp

@@ -63,7 +63,6 @@ TextDecoder::Decode(const char* aInput, const int32_t aLength,
   }
   // Need a fallible allocator because the caller may be a content
   // and the content can specify the length of the string.
-  static const fallible_t fallible = fallible_t();
   nsAutoArrayPtr<char16_t> buf(new (fallible) char16_t[outLen + 1]);
   if (!buf) {
     aRv.Throw(NS_ERROR_OUT_OF_MEMORY);

dom/encoding/TextEncoder.cpp

@@ -53,7 +53,6 @@ TextEncoder::Encode(JSContext* aCx,
   }
   // Need a fallible allocator because the caller may be a content
   // and the content can specify the length of the string.
-  static const fallible_t fallible = fallible_t();
   nsAutoArrayPtr<char> buf(new (fallible) char[maxLen + 1]);
   if (!buf) {
     aRv.Throw(NS_ERROR_OUT_OF_MEMORY);

dom/fetch/Fetch.cpp

@@ -470,7 +470,7 @@ ExtractFromUSVString(const nsString& aStr,
   }
 
   nsCString encoded;
-  if (!encoded.SetCapacity(destBufferLen, fallible_t())) {
+  if (!encoded.SetCapacity(destBufferLen, fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
 
@@ -583,7 +583,7 @@ public:
       return rv;
     }
 
-    if (!mDecoded.SetCapacity(mDecoded.Length() + destBufferLen, fallible_t())) {
+    if (!mDecoded.SetCapacity(mDecoded.Length() + destBufferLen, fallible)) {
       return NS_ERROR_OUT_OF_MEMORY;
     }
 

dom/filehandle/MemoryStreams.cpp

@@ -26,7 +26,7 @@ MemoryOutputStream::Create(uint64_t aSize)
   nsRefPtr<MemoryOutputStream> stream = new MemoryOutputStream();
 
   char* dummy;
-  uint32_t length = stream->mData.GetMutableData(&dummy, aSize, fallible_t());
+  uint32_t length = stream->mData.GetMutableData(&dummy, aSize, fallible);
   NS_ENSURE_TRUE(length == aSize, nullptr);
 
   return stream.forget();

dom/html/HTMLFrameSetElement.cpp

@@ -232,7 +232,6 @@ HTMLFrameSetElement::ParseRowCol(const nsAString & aValue,
     commaX = spec.FindChar(sComma, commaX + 1);
   }
 
-  static const fallible_t fallible = fallible_t();
   nsFramesetSpec* specs = new (fallible) nsFramesetSpec[count];
   if (!specs) {
     *aSpecs = nullptr;

dom/html/nsTextEditorState.cpp

@@ -1873,8 +1873,6 @@ bool
 nsTextEditorState::SetValue(const nsAString& aValue, bool aUserInput,
                             bool aSetValueChanged)
 {
-  mozilla::fallible_t fallible;
-
   if (mEditor && mBoundFrame) {
     // The InsertText call below might flush pending notifications, which
     // could lead into a scheduled PrepareEditor to be called.  That will

dom/indexedDB/ActorsParent.cpp

@@ -146,8 +146,6 @@ const int32_t kStorageProgressGranularity = 1000;
 
 const char kSavepointClause[] = "SAVEPOINT sp;";
 
-const fallible_t fallible = fallible_t();
-
 const uint32_t kFileCopyBufferSize = 32768;
 
 const char kJournalDirectoryName[] = "journals";

dom/indexedDB/IDBObjectStore.cpp

@@ -464,7 +464,7 @@ StructuredCloneReadString(JSStructuredCloneReader* aReader,
   }
   length = NativeEndian::swapFromLittleEndian(length);
 
-  if (!aString.SetLength(length, fallible_t())) {
+  if (!aString.SetLength(length, fallible)) {
     NS_WARNING("Out of memory?");
     return false;
   }

dom/media/fmp4/MP4Stream.h

@@ -11,7 +11,6 @@
 
 #include "MediaResource.h"
 
-#include "mozilla/fallible.h"
 #include "mozilla/Maybe.h"
 #include "mozilla/Monitor.h"
 
@@ -77,7 +76,7 @@ private:
 
     bool Init()
     {
-      mBuffer = new ((fallible_t())) char[mCount];
+      mBuffer = new (fallible) char[mCount];
       return !!mBuffer;
     }
 

dom/media/webaudio/AudioDestinationNode.cpp

@@ -62,7 +62,6 @@ public:
       // channels or size, but it's OK since we'll deal with the failure
       // gracefully.
       if (mInputChannels.SetLength(mNumberOfChannels)) {
-        static const fallible_t fallible = fallible_t();
         for (uint32_t i = 0; i < mNumberOfChannels; ++i) {
           mInputChannels[i] = new (fallible) float[mLength];
           if (!mInputChannels[i]) {

dom/media/webaudio/MediaBufferDecoder.cpp

@@ -333,7 +333,6 @@ MediaDecodeTask::FinishDecode()
   // Allocate the channel buffers.  Note that if we end up resampling, we may
   // write fewer bytes than mResampledFrames to the output buffer, in which
   // case mWriteIndex will tell us how many valid samples we have.
-  static const fallible_t fallible = fallible_t();
   bool memoryAllocationSuccess = true;
   if (!mDecodeJob.mChannelBuffers.SetLength(channelCount)) {
     memoryAllocationSuccess = false;

dom/plugins/base/nsPluginTags.cpp

@@ -259,7 +259,7 @@ static nsresult ConvertToUTF8(nsIUnicodeDecoder *aUnicodeDecoder,
   nsresult rv = aUnicodeDecoder->GetMaxLength(aString.get(), numberOfBytes,
                                               &outUnicodeLen);
   NS_ENSURE_SUCCESS(rv, rv);
-  if (!buffer.SetLength(outUnicodeLen, fallible_t()))
+  if (!buffer.SetLength(outUnicodeLen, fallible))
     return NS_ERROR_OUT_OF_MEMORY;
   rv = aUnicodeDecoder->Convert(aString.get(), &numberOfBytes,
                                 buffer.BeginWriting(), &outUnicodeLen);

dom/storage/DOMStorage.cpp

@@ -117,7 +117,7 @@ DOMStorage::SetItem(const nsAString& aKey, const nsAString& aData,
       : Telemetry::SESSIONDOMSTORAGE_VALUE_SIZE_BYTES, aData.Length());
 
   nsString data;
-  bool ok = data.Assign(aData, fallible_t());
+  bool ok = data.Assign(aData, fallible);
   if (!ok) {
     aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
     return;

dom/svg/SVGContentUtils.h

@@ -10,7 +10,6 @@
 #define _USE_MATH_DEFINES
 #include <math.h>
 
-#include "mozilla/fallible.h"
 #include "mozilla/gfx/2D.h" // for StrokeOptions
 #include "mozilla/gfx/Matrix.h"
 #include "mozilla/RangedPtr.h"
@@ -111,8 +110,7 @@ public:
         mDashPattern = mSmallArray;
         return mSmallArray;
       }
-      static const mozilla::fallible_t fallible = mozilla::fallible_t();
+      Float* nonConstArray = new (mozilla::fallible) Float[aDashCount];
-      Float* nonConstArray = new (fallible) Float[aDashCount];
       mDashPattern = nonConstArray;
       return nonConstArray;
     }

dom/svg/SVGFEConvolveMatrixElement.cpp

@@ -202,7 +202,6 @@ SVGFEConvolveMatrixElement::GetPrimitiveDescription(nsSVGFilterInstance* aInstan
   if (orderX > NS_SVG_OFFSCREEN_MAX_DIMENSION ||
       orderY > NS_SVG_OFFSCREEN_MAX_DIMENSION)
     return failureDescription;
-  const fallible_t fallible = fallible_t();
   nsAutoArrayPtr<float> kernel(new (fallible) float[orderX * orderY]);
   if (!kernel)
     return failureDescription;

dom/xslt/base/txDouble.cpp

@@ -179,7 +179,7 @@ void txDouble::toString(double aValue, nsAString& aDest)
         ++length;
     // grow the string
     uint32_t oldlength = aDest.Length();
-    if (!aDest.SetLength(oldlength + length, mozilla::fallible_t()))
+    if (!aDest.SetLength(oldlength + length, mozilla::fallible))
         return; // out of memory
     nsAString::iterator dest;
     aDest.BeginWriting(dest).advance(int32_t(oldlength));

dom/xslt/xpath/txMozillaXPathTreeWalker.cpp

@@ -514,7 +514,7 @@ txXPathNodeUtils::appendNodeValue(const txXPathNode& aNode, nsAString& aResult)
         aNode.mNode->IsElement() ||
         aNode.mNode->IsNodeOfType(nsINode::eDOCUMENT_FRAGMENT)) {
         nsContentUtils::AppendNodeTextContent(aNode.mNode, true, aResult,
-                                              mozilla::fallible_t());
+                                              mozilla::fallible);
 
         return;
     }

editor/libeditor/nsTextEditRules.cpp

@@ -1198,7 +1198,7 @@ nsTextEditRules::TruncateInsertionIfNeeded(Selection* aSelection,
   if (!aSelection || !aInString || !aOutString) {return NS_ERROR_NULL_POINTER;}
   
   nsresult res = NS_OK;
-  if (!aOutString->Assign(*aInString, mozilla::fallible_t())) {
+  if (!aOutString->Assign(*aInString, mozilla::fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
   if (aTruncated) {

extensions/spellcheck/src/mozInlineSpellWordUtil.cpp

@@ -576,7 +576,7 @@ mozInlineSpellWordUtil::BuildSoftText()
           DOMTextMapping(NodeOffset(node, firstOffsetInNode), mSoftText.Length(), len));
 
         bool ok = textFragment->AppendTo(mSoftText, firstOffsetInNode, len,
-                                         mozilla::fallible_t());
+                                         mozilla::fallible);
         if (!ok) {
             // probably out of memory, remove from mSoftTextDOMMapping
             mSoftTextDOMMapping.RemoveElementAt(mSoftTextDOMMapping.Length() - 1);

gfx/layers/client/TextureClient.cpp

@@ -674,7 +674,6 @@ bool
 MemoryTextureClient::Allocate(uint32_t aSize)
 {
   MOZ_ASSERT(!mBuffer);
-  static const fallible_t fallible = fallible_t();
   mBuffer = new (fallible) uint8_t[aSize];
   if (!mBuffer) {
     NS_WARNING("Failed to allocate buffer");

gfx/thebes/gfxFT2FontList.cpp

@@ -1096,7 +1096,6 @@ gfxFT2FontList::AppendFacesFromOmnijarEntry(nsZipArchive* aArchive,
     uint32_t bufSize = item->RealSize();
     // We use fallible allocation here; if there's not enough RAM, we'll simply
     // ignore the bundled fonts and fall back to the device's installed fonts.
-    static const fallible_t fallible = fallible_t();
     nsAutoArrayPtr<uint8_t> buf(new (fallible) uint8_t[bufSize]);
     if (!buf) {
         return;

image/decoders/icon/win/nsIconChannel.cpp

@@ -490,7 +490,7 @@ CreateBitmapInfo(BITMAPINFOHEADER* aHeader, size_t aColorTableSize)
 {
   BITMAPINFO* bmi = (BITMAPINFO*) ::operator new(sizeof(BITMAPINFOHEADER) +
                                                  aColorTableSize,
-                                                 mozilla::fallible_t());
+                                                 mozilla::fallible);
   if (bmi) {
     memcpy(bmi, aHeader, sizeof(BITMAPINFOHEADER));
     memset(bmi->bmiColors, 0, aColorTableSize);

image/encoders/bmp/nsBMPEncoder.cpp

@@ -185,7 +185,6 @@ nsBMPEncoder::AddImageFrame(const uint8_t* aData,
     return NS_ERROR_INVALID_ARG;
   }
 
-  static fallible_t fallible = fallible_t();
   nsAutoArrayPtr<uint8_t> row(new (fallible)
                               uint8_t[mBMPInfoHeader.width *
                               BytesPerPixel(mBMPInfoHeader.bpp)]);

image/src/SourceBuffer.h

@@ -272,7 +272,6 @@ private:
       , mLength(0)
     {
       MOZ_ASSERT(aCapacity > 0, "Creating zero-capacity chunk");
-      static const fallible_t fallible = fallible_t();
       mData = new (fallible) char[mCapacity];
     }
 

intl/uconv/nsScriptableUConv.cpp

@@ -65,7 +65,7 @@ nsScriptableUnicodeConverter::ConvertFromUnicode(const nsAString& aSrc,
   nsresult rv = ConvertFromUnicodeWithLength(aSrc, &len, &str);
   if (NS_SUCCEEDED(rv)) {
     // No Adopt on nsACString :(
-    if (!_retval.Assign(str, len, mozilla::fallible_t())) {
+    if (!_retval.Assign(str, len, mozilla::fallible)) {
       rv = NS_ERROR_OUT_OF_MEMORY;
     }
     moz_free(str);
@@ -114,7 +114,7 @@ nsScriptableUnicodeConverter::Finish(nsACString& _retval)
   nsresult rv = FinishWithLength(&str, &len);
   if (NS_SUCCEEDED(rv)) {
     // No Adopt on nsACString :(
-    if (!_retval.Assign(str, len, mozilla::fallible_t())) {
+    if (!_retval.Assign(str, len, mozilla::fallible)) {
       rv = NS_ERROR_OUT_OF_MEMORY;
     }
     moz_free(str);
@@ -160,7 +160,7 @@ nsScriptableUnicodeConverter::ConvertFromByteArray(const uint8_t* aData,
     if (NS_SUCCEEDED(rv))
     {
       buf[outLength] = 0;
-      if (!_retval.Assign(buf, outLength, mozilla::fallible_t())) {
+      if (!_retval.Assign(buf, outLength, mozilla::fallible)) {
         rv = NS_ERROR_OUT_OF_MEMORY;
       }
     }

layout/base/nsBidiPresUtils.cpp

@@ -2220,7 +2220,7 @@ void nsBidiPresUtils::CopyLogicalToVisual(const nsAString& aSource,
   uint32_t srcLength = aSource.Length();
   if (srcLength == 0)
     return;
-  if (!aDest.SetLength(srcLength, fallible_t())) {
+  if (!aDest.SetLength(srcLength, fallible)) {
     return;
   }
   nsAString::const_iterator fromBegin, fromEnd;

media/webrtc/signaling/src/mediapipeline/MediaPipeline.cpp

@@ -1009,7 +1009,6 @@ void MediaPipelineTransmit::PipelineListener::ProcessVideoChunk(
 
     // Send a black image.
     nsAutoArrayPtr<uint8_t> pixelData;
-    static const fallible_t fallible = fallible_t();
     pixelData = new (fallible) uint8_t[length];
     if (pixelData) {
       // YCrCb black = 0x10 0x80 0x80

memory/fallible/fallible.cpp

@@ -2,13 +2,10 @@
  * 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 mozilla_fallible_h
+#include "fallible.h"
-#define mozilla_fallible_h
 
 namespace mozilla {
 
-struct fallible_t { };
+const fallible_t fallible = {};
 
-} // namespace mozilla
+}
-
-#endif // mozilla_fallible_h

memory/fallible/fallible.h

@@ -0,0 +1,67 @@
+/* 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 mozilla_fallible_h
+#define mozilla_fallible_h
+
+#if defined(__cplusplus)
+
+/* Explicit fallible allocation
+ *
+ * Memory allocation (normally) defaults to abort in case of failed
+ * allocation. That is, it never returns NULL, and crashes instead.
+ *
+ * Code can explicitely request for fallible memory allocation thanks
+ * to the declarations below.
+ *
+ * The typical use of the mozilla::fallible const is with placement new,
+ * like the following:
+ *
+ *     foo = new (mozilla::fallible) Foo();
+ *
+ * The following forms, or derivatives, are also possible but deprecated:
+ *
+ *     foo = new ((mozilla::fallible_t())) Foo();
+ *
+ *     const mozilla::fallible_t fallible = mozilla::fallible_t();
+ *     bar = new (f) Bar();
+ *
+ * It is also possible to declare method overloads with fallible allocation
+ * alternatives, like so:
+ *
+ *     class Foo {
+ *     public:
+ *       void Method(void *);
+ *       void Method(void *, const mozilla::fallible_t&);
+ *     };
+ *
+ *     Foo foo;
+ *     foo.Method(nullptr, mozilla::fallible);
+ *
+ * If that last method call is in a method that itself takes a const
+ * fallible_t& argument, it is recommended to propagate that argument
+ * instead of using mozilla::fallible:
+ *
+ *     void Func(Foo &foo, const mozilla::fallible_t& aFallible) {
+ *         foo.Method(nullptr, aFallible);
+ *     }
+ *
+ */
+namespace mozilla {
+
+struct fallible_t { };
+
+/* This symbol is kept unexported, such that in corner cases where the
+ * compiler can't remove its use (essentially, cross compilation-unit
+ * calls), the smallest machine code is used.
+ * Depending how the linker packs symbols, it will consume between 1 and
+ * 8 bytes of read-only data in each executable or shared library, but
+ * only in those where it's actually not optimized out by the compiler.
+ */
+extern const fallible_t fallible;
+
+} // namespace mozilla
+#endif
+
+#endif // mozilla_fallible_h

memory/fallible/moz.build

@@ -0,0 +1,30 @@
+# -*- Mode: python; c-basic-offset: 4; 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 += [
+    'fallible.h',
+]
+
+Library('fallible')
+
+SOURCES += [
+    'fallible.cpp',
+]
+
+if CONFIG['_MSC_VER']:
+    # MSVC normally adds linker directives relative to the CRT in a .drectve
+    # section in .obj files. Then, when linking objects, it adds those
+    # directives as if they were given as command line arguments. This can
+    # lead to trying to include link CRTs because different objects are
+    # compiled with different CRT options (i.e. -MT vs. -MD), and failing.
+    # The only source in this directory doesn't expose anything that depends
+    # on a CRT, so it doesn't need to be bound to a specific one.
+    # Adding the -Zl option makes MSVC not store linker directives in the
+    # object. This allows to link fallible.obj to binaries independently of
+    # the CRT they use.
+    CXXFLAGS += [
+        '-Zl',
+    ]

memory/mozalloc/moz.build

@@ -6,7 +6,6 @@
 NO_VISIBILITY_FLAGS = True
 
 EXPORTS.mozilla += [
-    'fallible.h',
     'mozalloc.h',
     'mozalloc_abort.h',
     'mozalloc_oom.h',

modules/libjar/nsZipArchive.cpp

@@ -1157,7 +1157,7 @@ nsZipItemPtr_base::nsZipItemPtr_base(nsZipArchive *aZip, const char * aEntryName
   uint32_t size = 0;
   if (item->Compression() == DEFLATED) {
     size = item->RealSize();
-    mAutoBuf = new ((fallible_t())) uint8_t[size];
+    mAutoBuf = new (fallible) uint8_t[size];
     if (!mAutoBuf) {
       return;
     }

modules/libpref/nsPrefBranch.cpp

@@ -330,7 +330,7 @@ NS_IMETHODIMP nsPrefBranch::GetComplexValue(const char *aPrefName, const nsIID &
       // Debugging to see why we end up with very long strings here with
       // some addons, see bug 836263.
       nsAutoString wdata;
-      if (!AppendUTF8toUTF16(utf8String, wdata, mozilla::fallible_t())) {
+      if (!AppendUTF8toUTF16(utf8String, wdata, mozilla::fallible)) {
 #ifdef MOZ_CRASHREPORTER
         nsCOMPtr<nsICrashReporter> cr =
           do_GetService("@mozilla.org/toolkit/crash-reporter;1");

modules/libpref/prefapi.cpp

@@ -147,7 +147,7 @@ nsresult PREF_Init()
 {
     if (!gHashTable.IsInitialized()) {
         if (!PL_DHashTableInit(&gHashTable, &pref_HashTableOps,
-                               sizeof(PrefHashEntry), fallible_t(),
+                               sizeof(PrefHashEntry), fallible,
                                PREF_HASHTABLE_INITIAL_LENGTH)) {
             return NS_ERROR_OUT_OF_MEMORY;
         }

moz.build

@@ -43,6 +43,7 @@ if not CONFIG['LIBXUL_SDK']:
 
         DIRS += [
             'mozglue',
+            'memory/fallible',
             'memory/mozalloc',
             'memory/volatile',
         ]

netwerk/base/nsBufferedStreams.cpp

@@ -71,8 +71,7 @@ nsBufferedStream::Init(nsISupports* stream, uint32_t bufferSize)
     mBufferSize = bufferSize;
     mBufferStartOffset = 0;
     mCursor = 0;
-    const mozilla::fallible_t fallible = mozilla::fallible_t();
+    mBuffer = new (mozilla::fallible) char[bufferSize];
-    mBuffer = new (fallible) char[bufferSize];
     if (mBuffer == nullptr)
         return NS_ERROR_OUT_OF_MEMORY;
     return NS_OK;

netwerk/base/nsNetUtil.h

@@ -1546,7 +1546,7 @@ NS_ReadInputStreamToString(nsIInputStream *aInputStream,
                            nsACString &aDest,
                            uint32_t aCount)
 {
-    if (!aDest.SetLength(aCount, mozilla::fallible_t()))
+    if (!aDest.SetLength(aCount, mozilla::fallible))
         return NS_ERROR_OUT_OF_MEMORY;
     void* dest = aDest.BeginWriting();
     return NS_ReadInputStreamToBuffer(aInputStream, &dest, aCount);

netwerk/base/nsStandardURL.cpp

@@ -588,7 +588,7 @@ nsStandardURL::BuildNormalizedSpec(const char *spec)
     // generate the normalized URL string
     //
     // approxLen should be correct or 1 high
-    if (!mSpec.SetLength(approxLen+1, mozilla::fallible_t())) // buf needs a trailing '\0' below
+    if (!mSpec.SetLength(approxLen+1, mozilla::fallible)) // buf needs a trailing '\0' below
         return NS_ERROR_OUT_OF_MEMORY;
     char *buf;
     mSpec.BeginWriting(buf);

netwerk/base/nsUnicharStreamLoader.cpp

@@ -26,7 +26,7 @@ nsUnicharStreamLoader::Init(nsIUnicharStreamLoaderObserver *aObserver)
 
   mObserver = aObserver;
 
-  if (!mRawData.SetCapacity(SNIFFING_BUFFER_SIZE, fallible_t()))
+  if (!mRawData.SetCapacity(SNIFFING_BUFFER_SIZE, fallible))
     return NS_ERROR_OUT_OF_MEMORY;
 
   return NS_OK;
@@ -214,7 +214,7 @@ nsUnicharStreamLoader::WriteSegmentFun(nsIInputStream *,
   self->mDecoder->GetMaxLength(aSegment, srcLen, &dstLen);
 
   uint32_t capacity = haveRead + dstLen;
-  if (!self->mBuffer.SetCapacity(capacity, fallible_t())) {
+  if (!self->mBuffer.SetCapacity(capacity, fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
 

netwerk/cache/nsCacheEntry.cpp

@@ -405,7 +405,7 @@ nsCacheEntryHashTable::Init()
     nsresult rv = NS_OK;
     initialized = PL_DHashTableInit(&table, &ops,
                                     sizeof(nsCacheEntryHashTableEntry),
-                                    fallible_t(), 256);
+                                    fallible, 256);
 
     if (!initialized) rv = NS_ERROR_OUT_OF_MEMORY;
 

netwerk/cache/nsDiskCacheDeviceSQL.cpp

@@ -966,7 +966,7 @@ nsOfflineCacheDevice::UpdateEntry(nsCacheEntry *entry)
 
   nsCString metaDataBuf;
   uint32_t mdSize = entry->MetaDataSize();
-  if (!metaDataBuf.SetLength(mdSize, fallible_t()))
+  if (!metaDataBuf.SetLength(mdSize, fallible))
     return NS_ERROR_OUT_OF_MEMORY;
   char *md = metaDataBuf.BeginWriting();
   entry->FlattenMetaData(md, mdSize);

netwerk/protocol/http/nsHttp.cpp

@@ -106,7 +106,7 @@ nsHttp::CreateAtomTable()
     // known atoms (NUM_HTTP_ATOMS) because we expect to encounter a few random
     // headers right off the bat.
     if (!PL_DHashTableInit(&sAtomTable, &ops, sizeof(PLDHashEntryStub),
-                           fallible_t(), NUM_HTTP_ATOMS + 10)) {
+                           fallible, NUM_HTTP_ATOMS + 10)) {
         return NS_ERROR_OUT_OF_MEMORY;
     }
 

netwerk/protocol/websocket/WebSocketChannel.cpp

@@ -1609,7 +1609,7 @@ WebSocketChannel::ProcessInput(uint8_t *buffer, uint32_t count)
                utf8Data.Length()));
         } else {
           if (!utf8Data.Assign((const char *)payload, payloadLength,
-                               mozilla::fallible_t())) {
+                               mozilla::fallible)) {
             return NS_ERROR_OUT_OF_MEMORY;
           }
         }
@@ -1719,7 +1719,7 @@ WebSocketChannel::ProcessInput(uint8_t *buffer, uint32_t count)
                binaryData.Length()));
         } else {
           if (!binaryData.Assign((const char *)payload, payloadLength,
-                                 mozilla::fallible_t())) {
+                                 mozilla::fallible)) {
             return NS_ERROR_OUT_OF_MEMORY;
           }
         }

netwerk/streamconv/converters/nsDirIndexParser.cpp

@@ -333,7 +333,7 @@ nsDirIndexParser::OnDataAvailable(nsIRequest *aRequest, nsISupports *aCtxt,
   
   // Ensure that our mBuf has capacity to hold the data we're about to
   // read.
-  if (!mBuf.SetLength(len + aCount, fallible_t()))
+  if (!mBuf.SetLength(len + aCount, fallible))
     return NS_ERROR_OUT_OF_MEMORY;
 
   // Now read the data into our buffer.

parser/html/nsHtml5OwningUTF16Buffer.cpp

@@ -39,13 +39,12 @@ nsHtml5OwningUTF16Buffer::~nsHtml5OwningUTF16Buffer()
 already_AddRefed<nsHtml5OwningUTF16Buffer>
 nsHtml5OwningUTF16Buffer::FalliblyCreate(int32_t aLength)
 {
-  const mozilla::fallible_t fallible = mozilla::fallible_t();
+  char16_t* newBuf = new (mozilla::fallible) char16_t[aLength];
-  char16_t* newBuf = new (fallible) char16_t[aLength];
   if (!newBuf) {
     return nullptr;
   }
   nsRefPtr<nsHtml5OwningUTF16Buffer> newObj =
-    new (fallible) nsHtml5OwningUTF16Buffer(newBuf);
+    new (mozilla::fallible) nsHtml5OwningUTF16Buffer(newBuf);
   if (!newObj) {
     delete[] newBuf;
     return nullptr;

parser/html/nsHtml5StreamParser.cpp

@@ -771,8 +771,7 @@ nsHtml5StreamParser::SniffStreamBytes(const uint8_t* aFromSegment,
   }
 
   if (!mSniffingBuffer) {
-    const mozilla::fallible_t fallible = mozilla::fallible_t();
+    mSniffingBuffer = new (mozilla::fallible)
-    mSniffingBuffer = new (fallible)
       uint8_t[NS_HTML5_STREAM_PARSER_SNIFFING_BUFFER_SIZE];
     if (!mSniffingBuffer) {
       return NS_ERROR_OUT_OF_MEMORY;
@@ -1146,8 +1145,7 @@ nsHtml5StreamParser::OnDataAvailable(nsIRequest* aRequest,
   uint32_t totalRead;
   // Main thread to parser thread dispatch requires copying to buffer first.
   if (NS_IsMainThread()) {
-    const mozilla::fallible_t fallible = mozilla::fallible_t();
+    nsAutoArrayPtr<uint8_t> data(new (mozilla::fallible) uint8_t[aLength]);
-    nsAutoArrayPtr<uint8_t> data(new (fallible) uint8_t[aLength]);
     if (!data) {
       return mExecutor->MarkAsBroken(NS_ERROR_OUT_OF_MEMORY);
     }

parser/htmlparser/nsHTMLEntities.cpp

@@ -85,12 +85,12 @@ nsHTMLEntities::AddRefTable(void)
   if (!gTableRefCnt) {
     if (!PL_DHashTableInit(&gEntityToUnicode, &EntityToUnicodeOps,
                            sizeof(EntityNodeEntry),
-                           fallible_t(), NS_HTML_ENTITY_COUNT)) {
+                           fallible, NS_HTML_ENTITY_COUNT)) {
       return NS_ERROR_OUT_OF_MEMORY;
     }
     if (!PL_DHashTableInit(&gUnicodeToEntity, &UnicodeToEntityOps,
                            sizeof(EntityNodeEntry),
-                           fallible_t(), NS_HTML_ENTITY_COUNT)) {
+                           fallible, NS_HTML_ENTITY_COUNT)) {
       PL_DHashTableFinish(&gEntityToUnicode);
       return NS_ERROR_OUT_OF_MEMORY;
     }

parser/htmlparser/nsScannerString.cpp

@@ -472,7 +472,7 @@ CopyUnicodeTo( const nsScannerIterator& aSrcStart,
                nsAString& aDest )
   {
     nsAString::iterator writer;
-    if (!aDest.SetLength(Distance(aSrcStart, aSrcEnd), mozilla::fallible_t())) {
+    if (!aDest.SetLength(Distance(aSrcStart, aSrcEnd), mozilla::fallible)) {
       aDest.Truncate();
       return; // out of memory
     }
@@ -505,7 +505,7 @@ AppendUnicodeTo( const nsScannerIterator& aSrcStart,
   {
     nsAString::iterator writer;
     uint32_t oldLength = aDest.Length();
-    if (!aDest.SetLength(oldLength + Distance(aSrcStart, aSrcEnd), mozilla::fallible_t()))
+    if (!aDest.SetLength(oldLength + Distance(aSrcStart, aSrcEnd), mozilla::fallible))
       return; // out of memory
     aDest.BeginWriting(writer).advance(oldLength);
     nsScannerIterator fromBegin(aSrcStart);

security/manager/ssl/src/nsCertTree.cpp

@@ -182,7 +182,7 @@ nsresult nsCertTree::InitCompareHash()
 {
   ClearCompareHash();
   if (!PL_DHashTableInit(&mCompareCache, &gMapOps,
-                         sizeof(CompareCacheHashEntryPtr), fallible_t(), 64)) {
+                         sizeof(CompareCacheHashEntryPtr), fallible, 64)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
   return NS_OK;

services/crypto/component/nsSyncJPAKE.cpp

@@ -16,7 +16,7 @@
 #include <base64.h>
 #include <nsString.h>
 
-using mozilla::fallible_t;
+using mozilla::fallible;
 
 static bool
 hex_from_2char(const unsigned char *c2, unsigned char *byteval)
@@ -73,7 +73,7 @@ static bool
 toHexString(const unsigned char * str, unsigned len, nsACString & out)
 {
   static const char digits[] = "0123456789ABCDEF";
-  if (!out.SetCapacity(2 * len, fallible_t()))
+  if (!out.SetCapacity(2 * len, fallible))
     return false;
   out.SetLength(0);
   for (unsigned i = 0; i < len; ++i) {
@@ -301,7 +301,7 @@ setBase64(const unsigned char * data, unsigned len, nsACString & out)
   
   if (base64 != nullptr) {
     size_t len = PORT_Strlen(base64);
-    if (out.SetCapacity(len, fallible_t())) {
+    if (out.SetCapacity(len, fallible)) {
       out.SetLength(0);
       out.Append(base64, len);
       PORT_Free((void*) base64);

toolkit/components/downloads/SQLFunctions.cpp

@@ -61,7 +61,7 @@ Base64urlEncode(const uint8_t* aBytes,
   // result, we set the capacity to be one greater than what we need, and the
   // length to our desired length.
   uint32_t length = (aNumBytes + 2) / 3 * 4; // +2 due to integer math.
-  NS_ENSURE_TRUE(_result.SetCapacity(length + 1, mozilla::fallible_t()),
+  NS_ENSURE_TRUE(_result.SetCapacity(length + 1, mozilla::fallible),
                  NS_ERROR_OUT_OF_MEMORY);
   _result.SetLength(length);
   (void)PL_Base64Encode(reinterpret_cast<const char*>(aBytes), aNumBytes,

toolkit/components/places/Helpers.cpp

@@ -212,7 +212,7 @@ Base64urlEncode(const uint8_t* aBytes,
   // result, we set the capacity to be one greater than what we need, and the
   // length to our desired length.
   uint32_t length = (aNumBytes + 2) / 3 * 4; // +2 due to integer math.
-  NS_ENSURE_TRUE(_result.SetCapacity(length + 1, fallible_t()),
+  NS_ENSURE_TRUE(_result.SetCapacity(length + 1, fallible),
                  NS_ERROR_OUT_OF_MEMORY);
   _result.SetLength(length);
   (void)PL_Base64Encode(reinterpret_cast<const char*>(aBytes), aNumBytes,

toolkit/components/telemetry/Telemetry.cpp

@@ -1793,7 +1793,7 @@ TelemetryImpl::NewKeyedHistogram(const nsACString &name, const nsACString &expir
 
   KeyedHistogram* keyed = new KeyedHistogram(name, expiration, histogramType,
                                              min, max, bucketCount);
-  if (MOZ_UNLIKELY(!mKeyedHistograms.Put(name, keyed, fallible_t()))) {
+  if (MOZ_UNLIKELY(!mKeyedHistograms.Put(name, keyed, fallible))) {
     delete keyed;
     return NS_ERROR_OUT_OF_MEMORY;
   }

widget/windows/nsIMM32Handler.cpp

@@ -1689,7 +1689,7 @@ nsIMM32Handler::GetCompositionString(const nsIMEContext &aIMEContext,
   long lRtn = ::ImmGetCompositionStringW(aIMEContext.get(), aIndex, nullptr, 0);
   if (lRtn < 0 ||
       !aCompositionString.SetLength((lRtn / sizeof(WCHAR)) + 1,
-                                    mozilla::fallible_t())) {
+                                    mozilla::fallible)) {
     PR_LOG(gIMM32Log, PR_LOG_ALWAYS,
       ("IMM32: GetCompositionString, FAILED by OOM\n"));
     return; // Error or out of memory.
@@ -1756,7 +1756,7 @@ nsIMM32Handler::ConvertToANSIString(const nsAFlatString& aStr, UINT aCodePage,
                                   nullptr, 0, nullptr, nullptr);
   NS_ENSURE_TRUE(len >= 0, false);
 
-  if (!aANSIStr.SetLength(len, mozilla::fallible_t())) {
+  if (!aANSIStr.SetLength(len, mozilla::fallible)) {
     PR_LOG(gIMM32Log, PR_LOG_ALWAYS,
       ("IMM32: ConvertToANSIString, FAILED by OOM\n"));
     return false;

xpcom/base/nsCycleCollector.cpp

@@ -1357,7 +1357,7 @@ private:
     if (!aPi) {
       MOZ_CRASH();
     }
-    if (!aQueue.Push(aPi, fallible_t())) {
+    if (!aQueue.Push(aPi, fallible)) {
       mVisitor.Failed();
     }
   }

xpcom/ds/nsStaticNameTable.cpp

@@ -139,7 +139,7 @@ nsStaticCaseInsensitiveNameTable::Init(const char* const aNames[],
   }
 
   if (!PL_DHashTableInit(&mNameTable, &nametable_CaseInsensitiveHashTableOps,
-                         sizeof(NameTableEntry), fallible_t(),
+                         sizeof(NameTableEntry), fallible,
                          aLength)) {
     return false;
   }

xpcom/ds/nsSupportsPrimitives.cpp

@@ -7,8 +7,6 @@
 #include "nsMemory.h"
 #include "prprf.h"
 
-using mozilla::fallible_t;
-
 /***************************************************************************/
 
 NS_IMPL_ISUPPORTS(nsSupportsIDImpl, nsISupportsID, nsISupportsPrimitive)
@@ -107,7 +105,7 @@ nsSupportsCStringImpl::ToString(char** aResult)
 NS_IMETHODIMP
 nsSupportsCStringImpl::SetData(const nsACString& aData)
 {
-  bool ok = mData.Assign(aData, fallible_t());
+  bool ok = mData.Assign(aData, mozilla::fallible);
   if (!ok) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
@@ -152,7 +150,7 @@ nsSupportsStringImpl::ToString(char16_t** aResult)
 NS_IMETHODIMP
 nsSupportsStringImpl::SetData(const nsAString& aData)
 {
-  bool ok = mData.Assign(aData, fallible_t());
+  bool ok = mData.Assign(aData, mozilla::fallible);
   if (!ok) {
     return NS_ERROR_OUT_OF_MEMORY;
   }

xpcom/glue/moz.build

@@ -114,3 +114,8 @@ if CONFIG['ENABLE_TESTS']:
     DIRS += ['tests/gtest']
 
 FAIL_ON_WARNINGS = True
+
+# Include fallible for third party code using the xpcom glue
+USE_LIBS += [
+    'fallible',
+]

xpcom/glue/nomozalloc/moz.build

@@ -42,3 +42,8 @@ USE_STATIC_LIBS = True
 DISABLE_STL_WRAPPING = True
 
 FAIL_ON_WARNINGS = True
+
+# Include fallible for third party code using the xpcom glue
+USE_LIBS += [
+    'fallible',
+]

xpcom/glue/nsBaseHashtable.h

@@ -123,7 +123,7 @@ public:
    */
   void Put(KeyType aKey, const UserDataType& aData)
   {
-    if (!Put(aKey, aData, fallible_t())) {
+    if (!Put(aKey, aData, mozilla::fallible)) {
       NS_ABORT_OOM(this->mTable.EntrySize() * this->mTable.EntryCount());
     }
   }

xpcom/glue/nsDeque.h

@@ -84,7 +84,7 @@ public:
    */
   void Push(void* aItem)
   {
-    if (!Push(aItem, fallible_t())) {
+    if (!Push(aItem, mozilla::fallible)) {
       NS_ABORT_OOM(mSize * sizeof(void*));
     }
   }
@@ -98,7 +98,7 @@ public:
    */
   void PushFront(void* aItem)
   {
-    if (!PushFront(aItem, fallible_t())) {
+    if (!PushFront(aItem, mozilla::fallible)) {
       NS_ABORT_OOM(mSize * sizeof(void*));
     }
   }

xpcom/glue/nsRefPtrHashtable.h

@@ -147,7 +147,7 @@ void
 nsRefPtrHashtable<KeyClass, RefPtr>::Put(KeyType aKey,
                                          already_AddRefed<RefPtr> aData)
 {
-  if (!Put(aKey, mozilla::Move(aData), mozilla::fallible_t())) {
+  if (!Put(aKey, mozilla::Move(aData), mozilla::fallible)) {
     NS_ABORT_OOM(this->mTable.EntrySize() * this->mTable.EntryCount());
   }
 }

xpcom/glue/nsTHashtable.h

@@ -149,7 +149,7 @@ public:
    */
   EntryType* PutEntry(KeyType aKey)
   {
-    EntryType* e = PutEntry(aKey, fallible_t());
+    EntryType* e = PutEntry(aKey, mozilla::fallible);
     if (!e) {
       NS_ABORT_OOM(mTable.EntrySize() * mTable.EntryCount());
     }

xpcom/glue/pldhash.cpp

@@ -176,7 +176,7 @@ PL_NewDHashTable(const PLDHashTableOps* aOps, uint32_t aEntrySize,
   if (!table) {
     return nullptr;
   }
-  if (!PL_DHashTableInit(table, aOps, aEntrySize, fallible_t(), aLength)) {
+  if (!PL_DHashTableInit(table, aOps, aEntrySize, fallible, aLength)) {
     free(table);
     return nullptr;
   }
@@ -276,7 +276,7 @@ void
 PL_DHashTableInit(PLDHashTable* aTable, const PLDHashTableOps* aOps,
                   uint32_t aEntrySize, uint32_t aLength)
 {
-  if (!PL_DHashTableInit(aTable, aOps, aEntrySize, fallible_t(), aLength)) {
+  if (!PL_DHashTableInit(aTable, aOps, aEntrySize, fallible, aLength)) {
     if (aLength > PL_DHASH_MAX_INITIAL_LENGTH) {
       MOZ_CRASH();          // the asked-for length was too big
     }

xpcom/glue/standalone/moz.build

@@ -44,3 +44,8 @@ LOCAL_INCLUDES += [
 DISABLE_STL_WRAPPING = True
 
 FAIL_ON_WARNINGS = True
+
+# Include fallible for third party code using the xpcom glue
+USE_LIBS += [
+    'fallible',
+]

xpcom/glue/standalone/staticruntime/moz.build

@@ -39,3 +39,8 @@ USE_STATIC_LIBS = True
 DISABLE_STL_WRAPPING = True
 
 FAIL_ON_WARNINGS = True
+
+# Include fallible for third party code using the xpcom glue
+USE_LIBS += [
+    'fallible',
+]

xpcom/glue/staticruntime/moz.build

@@ -37,3 +37,8 @@ USE_STATIC_LIBS = True
 DISABLE_STL_WRAPPING = True
 
 FAIL_ON_WARNINGS = True
+
+# Include fallible for third party code using the xpcom glue
+USE_LIBS += [
+    'fallible',
+]

xpcom/io/Base64.cpp

@@ -267,7 +267,7 @@ Base64Encode(const nsACString& aBinaryData, nsACString& aString)
   char* buffer;
 
   // Add one byte for null termination.
-  if (aString.SetCapacity(stringLen + 1, fallible_t()) &&
+  if (aString.SetCapacity(stringLen + 1, fallible) &&
       (buffer = aString.BeginWriting()) &&
       PL_Base64Encode(aBinaryData.BeginReading(), aBinaryData.Length(), buffer)) {
     // PL_Base64Encode doesn't null terminate the buffer for us when we pass
@@ -317,7 +317,7 @@ Base64Decode(const nsACString& aString, nsACString& aBinaryData)
   char* buffer;
 
   // Add one byte for null termination.
-  if (aBinaryData.SetCapacity(binaryDataLen + 1, fallible_t()) &&
+  if (aBinaryData.SetCapacity(binaryDataLen + 1, fallible) &&
       (buffer = aBinaryData.BeginWriting()) &&
       PL_Base64Decode(aString.BeginReading(), aString.Length(), buffer)) {
     // PL_Base64Decode doesn't null terminate the buffer for us when we pass

xpcom/io/SnappyCompressOutputStream.cpp

@@ -107,7 +107,7 @@ SnappyCompressOutputStream::WriteSegments(nsReadSegmentFun aReader,
   }
 
   if (!mBuffer) {
-    mBuffer.reset(new ((fallible_t())) char[mBlockSize]);
+    mBuffer.reset(new (fallible) char[mBlockSize]);
     if (NS_WARN_IF(!mBuffer)) {
       return NS_ERROR_OUT_OF_MEMORY;
     }
@@ -174,7 +174,7 @@ SnappyCompressOutputStream::FlushToBaseStream()
   // will then get re-used until the stream is closed.
   if (!mCompressedBuffer) {
     mCompressedBufferLength = MaxCompressedBufferLength(mBlockSize);
-    mCompressedBuffer.reset(new ((fallible_t())) char[mCompressedBufferLength]);
+    mCompressedBuffer.reset(new (fallible) char[mCompressedBufferLength]);
     if (NS_WARN_IF(!mCompressedBuffer)) {
       return NS_ERROR_OUT_OF_MEMORY;
     }

xpcom/io/SnappyUncompressInputStream.cpp

@@ -188,14 +188,14 @@ SnappyUncompressInputStream::ParseNextChunk(uint32_t* aBytesReadOut)
   // operation.  These allocations only happens once.  The buffers are reused
   // until the stream is closed.
   if (!mUncompressedBuffer) {
-    mUncompressedBuffer.reset(new ((fallible_t())) char[snappy::kBlockSize]);
+    mUncompressedBuffer.reset(new (fallible) char[snappy::kBlockSize]);
     if (NS_WARN_IF(!mUncompressedBuffer)) {
       return NS_ERROR_OUT_OF_MEMORY;
     }
   }
 
   if (!mCompressedBuffer) {
-    mCompressedBuffer.reset(new ((fallible_t())) char[kCompressedBufferLength]);
+    mCompressedBuffer.reset(new (fallible) char[kCompressedBufferLength]);
     if (NS_WARN_IF(!mCompressedBuffer)) {
       return NS_ERROR_OUT_OF_MEMORY;
     }

xpcom/io/nsBinaryStream.cpp

@@ -765,7 +765,7 @@ nsBinaryInputStream::ReadString(nsAString& aString)
   }
 
   // pre-allocate output buffer, and get direct access to buffer...
-  if (!aString.SetLength(length, mozilla::fallible_t())) {
+  if (!aString.SetLength(length, mozilla::fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
 

xpcom/io/nsLocalFileWin.cpp

@@ -3654,7 +3654,7 @@ nsDriveEnumerator::Init()
    * the length required for the string. */
   DWORD length = GetLogicalDriveStringsW(0, 0);
   /* The string is null terminated */
-  if (!mDrives.SetLength(length + 1, fallible_t())) {
+  if (!mDrives.SetLength(length + 1, fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
   if (!GetLogicalDriveStringsW(length, wwc(mDrives.BeginWriting()))) {

xpcom/io/nsNativeCharsetUtils.cpp

@@ -814,7 +814,7 @@ NS_CopyNativeToUnicode(const nsACString& aInput, nsAString& aOutput)
   // this will generally result in a larger allocation, but that seems
   // better than an extra buffer copy.
   //
-  if (!aOutput.SetLength(inputLen, fallible_t())) {
+  if (!aOutput.SetLength(inputLen, fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
   nsAString::iterator out_iter;
@@ -925,7 +925,7 @@ NS_CopyNativeToUnicode(const nsACString& aInput, nsAString& aOutput)
   }
 
   // allocate sufficient space
-  if (!aOutput.SetLength(resultLen, fallible_t())) {
+  if (!aOutput.SetLength(resultLen, fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
   if (resultLen > 0) {
@@ -959,7 +959,7 @@ NS_CopyUnicodeToNative(const nsAString&  aInput, nsACString& aOutput)
   }
 
   // allocate sufficient space
-  if (!aOutput.SetLength(resultLen, fallible_t())) {
+  if (!aOutput.SetLength(resultLen, fallible)) {
     return NS_ERROR_OUT_OF_MEMORY;
   }
   if (resultLen > 0) {

xpcom/string/nsAString.h

@@ -14,8 +14,6 @@
 #include <string.h>
 #include <stdarg.h>
 
-#include "mozilla/fallible.h"
-
 #define kNotFound -1
 
 // declare nsAString

xpcom/string/nsReadableUtils.cpp

@@ -46,7 +46,7 @@ CopyASCIItoUTF16(const char* aSource, nsAString& aDest)
 void
 CopyUTF16toUTF8(const nsAString& aSource, nsACString& aDest)
 {
-  if (!CopyUTF16toUTF8(aSource, aDest, mozilla::fallible_t())) {
+  if (!CopyUTF16toUTF8(aSource, aDest, mozilla::fallible)) {
     // Note that this may wildly underestimate the allocation that failed, as
     // we report the length of aSource as UTF-16 instead of UTF-8.
     aDest.AllocFailed(aDest.Length() + aSource.Length());
@@ -55,10 +55,10 @@ CopyUTF16toUTF8(const nsAString& aSource, nsACString& aDest)
 
 bool
 CopyUTF16toUTF8(const nsAString& aSource, nsACString& aDest,
-                const mozilla::fallible_t&)
+                const mozilla::fallible_t& aFallible)
 {
   aDest.Truncate();
-  if (!AppendUTF16toUTF8(aSource, aDest, mozilla::fallible_t())) {
+  if (!AppendUTF16toUTF8(aSource, aDest, aFallible)) {
     return false;
   }
   return true;
@@ -108,18 +108,18 @@ LossyAppendUTF16toASCII(const nsAString& aSource, nsACString& aDest)
 void
 AppendASCIItoUTF16(const nsACString& aSource, nsAString& aDest)
 {
-  if (!AppendASCIItoUTF16(aSource, aDest, mozilla::fallible_t())) {
+  if (!AppendASCIItoUTF16(aSource, aDest, mozilla::fallible)) {
     aDest.AllocFailed(aDest.Length() + aSource.Length());
   }
 }
 
 bool
 AppendASCIItoUTF16(const nsACString& aSource, nsAString& aDest,
-                   const mozilla::fallible_t&)
+                   const mozilla::fallible_t& aFallible)
 {
   uint32_t old_dest_length = aDest.Length();
   if (!aDest.SetLength(old_dest_length + aSource.Length(),
-                       mozilla::fallible_t())) {
+                       aFallible)) {
     return false;
   }
 
@@ -157,7 +157,7 @@ AppendASCIItoUTF16(const char* aSource, nsAString& aDest)
 void
 AppendUTF16toUTF8(const nsAString& aSource, nsACString& aDest)
 {
-  if (!AppendUTF16toUTF8(aSource, aDest, mozilla::fallible_t())) {
+  if (!AppendUTF16toUTF8(aSource, aDest, mozilla::fallible)) {
     // Note that this may wildly underestimate the allocation that failed, as
     // we report the length of aSource as UTF-16 instead of UTF-8.
     aDest.AllocFailed(aDest.Length() + aSource.Length());
@@ -166,7 +166,7 @@ AppendUTF16toUTF8(const nsAString& aSource, nsACString& aDest)
 
 bool
 AppendUTF16toUTF8(const nsAString& aSource, nsACString& aDest,
-                  const mozilla::fallible_t&)
+                  const mozilla::fallible_t& aFallible)
 {
   nsAString::const_iterator source_start, source_end;
   CalculateUTF8Size calculator;
@@ -179,7 +179,7 @@ AppendUTF16toUTF8(const nsAString& aSource, nsACString& aDest,
     uint32_t old_dest_length = aDest.Length();
 
     // Grow the buffer if we need to.
-    if (!aDest.SetLength(old_dest_length + count, mozilla::fallible_t())) {
+    if (!aDest.SetLength(old_dest_length + count, aFallible)) {
       return false;
     }
 
@@ -200,14 +200,14 @@ AppendUTF16toUTF8(const nsAString& aSource, nsACString& aDest,
 void
 AppendUTF8toUTF16(const nsACString& aSource, nsAString& aDest)
 {
-  if (!AppendUTF8toUTF16(aSource, aDest, mozilla::fallible_t())) {
+  if (!AppendUTF8toUTF16(aSource, aDest, mozilla::fallible)) {
     aDest.AllocFailed(aDest.Length() + aSource.Length());
   }
 }
 
 bool
 AppendUTF8toUTF16(const nsACString& aSource, nsAString& aDest,
-                  const mozilla::fallible_t&)
+                  const mozilla::fallible_t& aFallible)
 {
   nsACString::const_iterator source_start, source_end;
   CalculateUTF8Length calculator;
@@ -221,7 +221,7 @@ AppendUTF8toUTF16(const nsACString& aSource, nsAString& aDest,
     uint32_t old_dest_length = aDest.Length();
 
     // Grow the buffer if we need to.
-    if (!aDest.SetLength(old_dest_length + count, mozilla::fallible_t())) {
+    if (!aDest.SetLength(old_dest_length + count, aFallible)) {
       return false;
     }
 

xpcom/string/nsTStringObsolete.cpp

@@ -464,18 +464,18 @@ nsTString_CharT::ReplaceSubstring(const char_type* aTarget,
 bool
 nsTString_CharT::ReplaceSubstring(const char_type* aTarget,
                                   const char_type* aNewValue,
-                                  const fallible_t& fallible)
+                                  const fallible_t& aFallible)
 {
   return ReplaceSubstring(nsTDependentString_CharT(aTarget),
                           nsTDependentString_CharT(aNewValue),
-                          fallible);
+                          aFallible);
 }
 
 void
 nsTString_CharT::ReplaceSubstring(const self_type& aTarget,
                                   const self_type& aNewValue)
 {
-  if (!ReplaceSubstring(aTarget, aNewValue, fallible_t())) {
+  if (!ReplaceSubstring(aTarget, aNewValue, mozilla::fallible)) {
     // Note that this may wildly underestimate the allocation that failed, as
     // we could have been replacing multiple copies of aTarget.
     AllocFailed(mLength + (aNewValue.Length() - aTarget.Length()));

xpcom/string/nsTSubstring.cpp

@@ -253,7 +253,7 @@ nsTSubstring_CharT::EnsureMutable(size_type aNewLen)
 
     aNewLen = mLength;
   }
-  return SetLength(aNewLen, fallible_t());
+  return SetLength(aNewLen, mozilla::fallible);
 }
 
 // ---------------------------------------------------------------------------
@@ -283,7 +283,7 @@ nsTSubstring_CharT::Assign(char_type aChar, const fallible_t&)
 void
 nsTSubstring_CharT::Assign(const char_type* aData)
 {
-  if (!Assign(aData, size_type(-1), fallible_t())) {
+  if (!Assign(aData, size_type(-1), mozilla::fallible)) {
     AllocFailed(char_traits::length(aData));
   }
 }
@@ -291,7 +291,7 @@ nsTSubstring_CharT::Assign(const char_type* aData)
 void
 nsTSubstring_CharT::Assign(const char_type* aData, size_type aLength)
 {
-  if (!Assign(aData, aLength, fallible_t())) {
+  if (!Assign(aData, aLength, mozilla::fallible)) {
     AllocFailed(aLength == size_type(-1) ? char_traits::length(aData)
                                          : aLength);
   }
@@ -299,7 +299,7 @@ nsTSubstring_CharT::Assign(const char_type* aData, size_type aLength)
 
 bool
 nsTSubstring_CharT::Assign(const char_type* aData, size_type aLength,
-                           const fallible_t&)
+                           const fallible_t& aFallible)
 {
   if (!aData || aLength == 0) {
     Truncate();
@@ -311,7 +311,7 @@ nsTSubstring_CharT::Assign(const char_type* aData, size_type aLength,
   }
 
   if (IsDependentOn(aData, aData + aLength)) {
-    return Assign(string_type(aData, aLength), fallible_t());
+    return Assign(string_type(aData, aLength), aFallible);
   }
 
   if (!ReplacePrep(0, mLength, aLength)) {
@@ -325,20 +325,20 @@ nsTSubstring_CharT::Assign(const char_type* aData, size_type aLength,
 void
 nsTSubstring_CharT::AssignASCII(const char* aData, size_type aLength)
 {
-  if (!AssignASCII(aData, aLength, fallible_t())) {
+  if (!AssignASCII(aData, aLength, mozilla::fallible)) {
     AllocFailed(aLength);
   }
 }
 
 bool
 nsTSubstring_CharT::AssignASCII(const char* aData, size_type aLength,
-                                const fallible_t&)
+                                const fallible_t& aFallible)
 {
   // A Unicode string can't depend on an ASCII string buffer,
   // so this dependence check only applies to CStrings.
 #ifdef CharT_is_char
   if (IsDependentOn(aData, aData + aLength)) {
-    return Assign(string_type(aData, aLength), fallible_t());
+    return Assign(string_type(aData, aLength), aFallible);
   }
 #endif
 
@@ -362,13 +362,13 @@ nsTSubstring_CharT::AssignLiteral(const char_type* aData, size_type aLength)
 void
 nsTSubstring_CharT::Assign(const self_type& aStr)
 {
-  if (!Assign(aStr, fallible_t())) {
+  if (!Assign(aStr, mozilla::fallible)) {
     AllocFailed(aStr.Length());
   }
 }
 
 bool
-nsTSubstring_CharT::Assign(const self_type& aStr, const fallible_t&)
+nsTSubstring_CharT::Assign(const self_type& aStr, const fallible_t& aFallible)
 {
   // |aStr| could be sharable. We need to check its flags to know how to
   // deal with it.
@@ -406,24 +406,24 @@ nsTSubstring_CharT::Assign(const self_type& aStr, const fallible_t&)
   }
 
   // else, treat this like an ordinary assignment.
-  return Assign(aStr.Data(), aStr.Length(), fallible_t());
+  return Assign(aStr.Data(), aStr.Length(), aFallible);
 }
 
 void
 nsTSubstring_CharT::Assign(const substring_tuple_type& aTuple)
 {
-  if (!Assign(aTuple, fallible_t())) {
+  if (!Assign(aTuple, mozilla::fallible)) {
     AllocFailed(aTuple.Length());
   }
 }
 
 bool
 nsTSubstring_CharT::Assign(const substring_tuple_type& aTuple,
-                           const fallible_t&)
+                           const fallible_t& aFallible)
 {
   if (aTuple.IsDependentOn(mData, mData + mLength)) {
     // take advantage of sharing here...
-    return Assign(string_type(aTuple), fallible_t());
+    return Assign(string_type(aTuple), aFallible);
   }
 
   size_type length = aTuple.Length();
@@ -486,7 +486,7 @@ nsTSubstring_CharT::Replace(index_type aCutStart, size_type aCutLength,
 bool
 nsTSubstring_CharT::Replace(index_type aCutStart, size_type aCutLength,
                             char_type aChar,
-                            const mozilla::fallible_t&)
+                            const fallible_t&)
 {
   aCutStart = XPCOM_MIN(aCutStart, Length());
 
@@ -504,7 +504,7 @@ nsTSubstring_CharT::Replace(index_type aCutStart, size_type aCutLength,
                             const char_type* aData, size_type aLength)
 {
   if (!Replace(aCutStart, aCutLength, aData, aLength,
-               mozilla::fallible_t())) {
+               mozilla::fallible)) {
     AllocFailed(Length() - aCutLength + 1);
   }
 }
@@ -512,7 +512,7 @@ nsTSubstring_CharT::Replace(index_type aCutStart, size_type aCutLength,
 bool
 nsTSubstring_CharT::Replace(index_type aCutStart, size_type aCutLength,
                             const char_type* aData, size_type aLength,
-                            const mozilla::fallible_t&)
+                            const fallible_t& aFallible)
 {
   // unfortunately, some callers pass null :-(
   if (!aData) {
@@ -524,7 +524,7 @@ nsTSubstring_CharT::Replace(index_type aCutStart, size_type aCutLength,
 
     if (IsDependentOn(aData, aData + aLength)) {
       nsTAutoString_CharT temp(aData, aLength);
-      return Replace(aCutStart, aCutLength, temp, mozilla::fallible_t());
+      return Replace(aCutStart, aCutLength, temp, aFallible);
     }
   }
 
@@ -602,7 +602,7 @@ nsTSubstring_CharT::ReplaceLiteral(index_type aCutStart, size_type aCutLength,
 void
 nsTSubstring_CharT::SetCapacity(size_type aCapacity)
 {
-  if (!SetCapacity(aCapacity, fallible_t())) {
+  if (!SetCapacity(aCapacity, mozilla::fallible)) {
     AllocFailed(aCapacity);
   }
 }
@@ -659,9 +659,9 @@ nsTSubstring_CharT::SetLength(size_type aLength)
 }
 
 bool
-nsTSubstring_CharT::SetLength(size_type aLength, const fallible_t&)
+nsTSubstring_CharT::SetLength(size_type aLength, const fallible_t& aFallible)
 {
-  if (!SetCapacity(aLength, fallible_t())) {
+  if (!SetCapacity(aLength, aFallible)) {
     return false;
   }
 

xpcom/string/nsTSubstring.h

@@ -176,9 +176,9 @@ public:
     return aIter = BeginWriting();
   }
 
-  char_iterator& BeginWriting(char_iterator& aIter, const fallible_t&)
+  char_iterator& BeginWriting(char_iterator& aIter, const fallible_t& aFallible)
   {
-    return aIter = BeginWriting(fallible_t());
+    return aIter = BeginWriting(aFallible);
   }
 
   char_iterator& EndWriting(char_iterator& aIter)
@@ -186,9 +186,9 @@ public:
     return aIter = EndWriting();
   }
 
-  char_iterator& EndWriting(char_iterator& aIter, const fallible_t&)
+  char_iterator& EndWriting(char_iterator& aIter, const fallible_t& aFallible)
   {
-    return aIter = EndWriting(fallible_t());
+    return aIter = EndWriting(aFallible);
   }
 
   /**
@@ -380,9 +380,10 @@ public:
     Assign(static_cast<const char16_t*>(aData));
   }
 
-  NS_WARN_UNUSED_RESULT bool Assign(char16ptr_t aData, const fallible_t&)
+  NS_WARN_UNUSED_RESULT bool Assign(char16ptr_t aData,
+                                    const fallible_t& aFallible)
   {
-    return Assign(static_cast<const char16_t*>(aData), fallible_t());
+    return Assign(static_cast<const char16_t*>(aData), aFallible);
   }
 
   void Assign(char16ptr_t aData, size_type aLength)
@@ -391,9 +392,10 @@ public:
   }
 
   NS_WARN_UNUSED_RESULT bool Assign(char16ptr_t aData, size_type aLength,
-                                    const fallible_t&)
+                                    const fallible_t& aFallible)
   {
-    return Assign(static_cast<const char16_t*>(aData), aLength, fallible_t());
+    return Assign(static_cast<const char16_t*>(aData), aLength,
+                  aFallible);
   }
 #endif
 
@@ -407,11 +409,11 @@ public:
     AssignASCII(aData, mozilla::AssertedCast<size_type, size_t>(strlen(aData)));
   }
   NS_WARN_UNUSED_RESULT bool NS_FASTCALL AssignASCII(const char* aData,
-                                                     const fallible_t&)
+                                                     const fallible_t& aFallible)
   {
     return AssignASCII(aData,
                        mozilla::AssertedCast<size_type, size_t>(strlen(aData)),
-                       fallible_t());
+                       aFallible);
   }
 
   // AssignLiteral must ONLY be applied to an actual literal string, or
@@ -473,7 +475,7 @@ public:
   NS_WARN_UNUSED_RESULT bool NS_FASTCALL Replace(index_type aCutStart,
                                                  size_type aCutLength,
                                                  char_type aChar,
-                                                 const mozilla::fallible_t&);
+                                                 const fallible_t&);
   void NS_FASTCALL Replace(index_type aCutStart, size_type aCutLength,
                            const char_type* aData,
                            size_type aLength = size_type(-1));
@@ -481,7 +483,7 @@ public:
                                                  size_type aCutLength,
                                                  const char_type* aData,
                                                  size_type aLength,
-                                                 const mozilla::fallible_t&);
+                                                 const fallible_t&);
   void Replace(index_type aCutStart, size_type aCutLength,
                const self_type& aStr)
   {
@@ -490,10 +492,10 @@ public:
   NS_WARN_UNUSED_RESULT bool Replace(index_type aCutStart,
                                      size_type aCutLength,
                                      const self_type& aStr,
-                                     const mozilla::fallible_t&)
+                                     const fallible_t& aFallible)
   {
     return Replace(aCutStart, aCutLength, aStr.Data(), aStr.Length(),
-                   mozilla::fallible_t());
+                   aFallible);
   }
   void NS_FASTCALL Replace(index_type aCutStart, size_type aCutLength,
                            const substring_tuple_type& aTuple);
@@ -517,18 +519,18 @@ public:
     Replace(mLength, 0, aChar);
   }
   NS_WARN_UNUSED_RESULT bool Append(char_type aChar,
-                                    const mozilla::fallible_t&)
+                                    const fallible_t& aFallible)
   {
-    return Replace(mLength, 0, aChar, mozilla::fallible_t());
+    return Replace(mLength, 0, aChar, aFallible);
   }
   void Append(const char_type* aData, size_type aLength = size_type(-1))
   {
     Replace(mLength, 0, aData, aLength);
   }
   NS_WARN_UNUSED_RESULT bool Append(const char_type* aData, size_type aLength,
-                                    const mozilla::fallible_t&)
+                                    const fallible_t& aFallible)
   {
-    return Replace(mLength, 0, aData, aLength, mozilla::fallible_t());
+    return Replace(mLength, 0, aData, aLength, aFallible);
   }
 
 #if defined(CharT_is_PRUnichar) && defined(MOZ_USE_CHAR16_WRAPPER)
@@ -766,10 +768,11 @@ public:
     return GetMutableData(reinterpret_cast<char16_t**>(aData), aNewLen);
   }
 
-  size_type GetMutableData(wchar_t** aData, size_type aNewLen, const fallible_t&)
+  size_type GetMutableData(wchar_t** aData, size_type aNewLen,
+                           const fallible_t& aFallible)
   {
     return GetMutableData(reinterpret_cast<char16_t**>(aData), aNewLen,
-                          fallible_t());
+                          aFallible);
   }
 #endif
 

xpcom/tests/TestPLDHash.cpp

@@ -27,7 +27,7 @@ static bool test_pldhash_Init_capacity_ok()
   // will allocate 0.5GB of entry store on 32-bit platforms and 1GB on 64-bit
   // platforms.
   if (!PL_DHashTableInit(&t, PL_DHashGetStubOps(), sizeof(PLDHashEntryStub),
-                         mozilla::fallible_t(), PL_DHASH_MAX_INITIAL_LENGTH)) {
+                         mozilla::fallible, PL_DHASH_MAX_INITIAL_LENGTH)) {
     return false;
   }
 
@@ -57,7 +57,7 @@ static bool test_pldhash_Init_capacity_too_large()
   // Try the smallest too-large capacity.
   if (PL_DHashTableInit(&t, PL_DHashGetStubOps(),
                         sizeof(PLDHashEntryStub),
-                        mozilla::fallible_t(),
+                        mozilla::fallible,
                         PL_DHASH_MAX_INITIAL_LENGTH + 1)) {
     return false;   // it succeeded!?
   }
@@ -93,7 +93,7 @@ static bool test_pldhash_Init_overflow()
   };
 
   if (PL_DHashTableInit(&t, PL_DHashGetStubOps(), sizeof(OneKBEntry),
-                        mozilla::fallible_t(), PL_DHASH_MAX_INITIAL_LENGTH)) {
+                        mozilla::fallible, PL_DHASH_MAX_INITIAL_LENGTH)) {
     return false;   // it succeeded!?
   }
   // Don't call PL_DHashTableFinish() here; it's not safe after Init() failure.

xpcom/tests/gtest/TestStrings.cpp

@@ -11,12 +11,11 @@
 #include "nsCRTGlue.h"
 #include "nsRefPtr.h"
 #include "nsTArray.h"
-#include "mozilla/fallible.h"
 #include "gtest/gtest.h"
 
 namespace TestStrings {
 
-using mozilla::fallible_t;
+using mozilla::fallible;
 
 void test_assign_helper(const nsACString& in, nsACString &_retval)
 {
@@ -851,75 +850,75 @@ TEST(Strings, huge_capacity)
   // Ignore the result if the address space is less than 64-bit because
   // some of the allocations above will exhaust the address space.
   if (sizeof(void*) >= 8) {
-    EXPECT_TRUE(a.SetCapacity(1, fallible_t()));
+    EXPECT_TRUE(a.SetCapacity(1, fallible));
-    EXPECT_FALSE(a.SetCapacity(nsString::size_type(-1)/2, fallible_t()));
+    EXPECT_FALSE(a.SetCapacity(nsString::size_type(-1)/2, fallible));
-    EXPECT_TRUE(a.SetCapacity(0, fallible_t()));  // free the allocated memory
+    EXPECT_TRUE(a.SetCapacity(0, fallible));  // free the allocated memory
 
-    EXPECT_TRUE(b.SetCapacity(1, fallible_t()));
+    EXPECT_TRUE(b.SetCapacity(1, fallible));
-    EXPECT_FALSE(b.SetCapacity(nsString::size_type(-1)/2 - 1, fallible_t()));
+    EXPECT_FALSE(b.SetCapacity(nsString::size_type(-1)/2 - 1, fallible));
-    EXPECT_TRUE(b.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(b.SetCapacity(0, fallible));
 
-    EXPECT_TRUE(c.SetCapacity(1, fallible_t()));
+    EXPECT_TRUE(c.SetCapacity(1, fallible));
-    EXPECT_FALSE(c.SetCapacity(nsString::size_type(-1)/2, fallible_t()));
+    EXPECT_FALSE(c.SetCapacity(nsString::size_type(-1)/2, fallible));
-    EXPECT_TRUE(c.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(c.SetCapacity(0, fallible));
 
-    EXPECT_FALSE(d.SetCapacity(nsString::size_type(-1)/2 - 1, fallible_t()));
+    EXPECT_FALSE(d.SetCapacity(nsString::size_type(-1)/2 - 1, fallible));
-    EXPECT_FALSE(d.SetCapacity(nsString::size_type(-1)/2, fallible_t()));
+    EXPECT_FALSE(d.SetCapacity(nsString::size_type(-1)/2, fallible));
-    EXPECT_TRUE(d.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(d.SetCapacity(0, fallible));
 
-    EXPECT_FALSE(e.SetCapacity(nsString::size_type(-1)/4, fallible_t()));
+    EXPECT_FALSE(e.SetCapacity(nsString::size_type(-1)/4, fallible));
-    EXPECT_FALSE(e.SetCapacity(nsString::size_type(-1)/4 + 1, fallible_t()));
+    EXPECT_FALSE(e.SetCapacity(nsString::size_type(-1)/4 + 1, fallible));
-    EXPECT_TRUE(e.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(e.SetCapacity(0, fallible));
 
-    EXPECT_FALSE(f.SetCapacity(nsString::size_type(-1)/2, fallible_t()));
+    EXPECT_FALSE(f.SetCapacity(nsString::size_type(-1)/2, fallible));
-    EXPECT_TRUE(f.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(f.SetCapacity(0, fallible));
 
-    EXPECT_FALSE(g.SetCapacity(nsString::size_type(-1)/4 + 1000, fallible_t()));
+    EXPECT_FALSE(g.SetCapacity(nsString::size_type(-1)/4 + 1000, fallible));
-    EXPECT_FALSE(g.SetCapacity(nsString::size_type(-1)/4 + 1001, fallible_t()));
+    EXPECT_FALSE(g.SetCapacity(nsString::size_type(-1)/4 + 1001, fallible));
-    EXPECT_TRUE(g.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(g.SetCapacity(0, fallible));
 
-    EXPECT_FALSE(h.SetCapacity(nsString::size_type(-1)/4+1, fallible_t()));
+    EXPECT_FALSE(h.SetCapacity(nsString::size_type(-1)/4+1, fallible));
-    EXPECT_FALSE(h.SetCapacity(nsString::size_type(-1)/2, fallible_t()));
+    EXPECT_FALSE(h.SetCapacity(nsString::size_type(-1)/2, fallible));
-    EXPECT_TRUE(h.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(h.SetCapacity(0, fallible));
 
-    EXPECT_TRUE(i.SetCapacity(1, fallible_t()));
+    EXPECT_TRUE(i.SetCapacity(1, fallible));
-    EXPECT_TRUE(i.SetCapacity(nsString::size_type(-1)/4 - 1000, fallible_t()));
+    EXPECT_TRUE(i.SetCapacity(nsString::size_type(-1)/4 - 1000, fallible));
-    EXPECT_FALSE(i.SetCapacity(nsString::size_type(-1)/4 + 1, fallible_t()));
+    EXPECT_FALSE(i.SetCapacity(nsString::size_type(-1)/4 + 1, fallible));
-    EXPECT_TRUE(i.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(i.SetCapacity(0, fallible));
 
-    EXPECT_TRUE(j.SetCapacity(nsString::size_type(-1)/4 - 1000, fallible_t()));
+    EXPECT_TRUE(j.SetCapacity(nsString::size_type(-1)/4 - 1000, fallible));
-    EXPECT_FALSE(j.SetCapacity(nsString::size_type(-1)/4 + 1, fallible_t()));
+    EXPECT_FALSE(j.SetCapacity(nsString::size_type(-1)/4 + 1, fallible));
-    EXPECT_TRUE(j.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(j.SetCapacity(0, fallible));
 
-    EXPECT_TRUE(k.SetCapacity(nsString::size_type(-1)/8 - 1000, fallible_t()));
+    EXPECT_TRUE(k.SetCapacity(nsString::size_type(-1)/8 - 1000, fallible));
-    EXPECT_TRUE(k.SetCapacity(nsString::size_type(-1)/4 - 1001, fallible_t()));
+    EXPECT_TRUE(k.SetCapacity(nsString::size_type(-1)/4 - 1001, fallible));
-    EXPECT_TRUE(k.SetCapacity(nsString::size_type(-1)/4 - 998, fallible_t()));
+    EXPECT_TRUE(k.SetCapacity(nsString::size_type(-1)/4 - 998, fallible));
-    EXPECT_FALSE(k.SetCapacity(nsString::size_type(-1)/4 + 1, fallible_t()));
+    EXPECT_FALSE(k.SetCapacity(nsString::size_type(-1)/4 + 1, fallible));
-    EXPECT_TRUE(k.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(k.SetCapacity(0, fallible));
 
-    EXPECT_TRUE(l.SetCapacity(nsString::size_type(-1)/8, fallible_t()));
+    EXPECT_TRUE(l.SetCapacity(nsString::size_type(-1)/8, fallible));
-    EXPECT_TRUE(l.SetCapacity(nsString::size_type(-1)/8 + 1, fallible_t()));
+    EXPECT_TRUE(l.SetCapacity(nsString::size_type(-1)/8 + 1, fallible));
-    EXPECT_TRUE(l.SetCapacity(nsString::size_type(-1)/8 + 2, fallible_t()));
+    EXPECT_TRUE(l.SetCapacity(nsString::size_type(-1)/8 + 2, fallible));
-    EXPECT_TRUE(l.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(l.SetCapacity(0, fallible));
 
-    EXPECT_TRUE(m.SetCapacity(nsString::size_type(-1)/8 + 1000, fallible_t()));
+    EXPECT_TRUE(m.SetCapacity(nsString::size_type(-1)/8 + 1000, fallible));
-    EXPECT_TRUE(m.SetCapacity(nsString::size_type(-1)/8 + 1001, fallible_t()));
+    EXPECT_TRUE(m.SetCapacity(nsString::size_type(-1)/8 + 1001, fallible));
-    EXPECT_TRUE(m.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(m.SetCapacity(0, fallible));
 
-    EXPECT_TRUE(n.SetCapacity(nsString::size_type(-1)/8+1, fallible_t()));
+    EXPECT_TRUE(n.SetCapacity(nsString::size_type(-1)/8+1, fallible));
-    EXPECT_FALSE(n.SetCapacity(nsString::size_type(-1)/4, fallible_t()));
+    EXPECT_FALSE(n.SetCapacity(nsString::size_type(-1)/4, fallible));
-    EXPECT_TRUE(n.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(n.SetCapacity(0, fallible));
 
-    EXPECT_TRUE(n.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(n.SetCapacity(0, fallible));
-    EXPECT_TRUE(n.SetCapacity((nsString::size_type(-1)/2 - sizeof(nsStringBuffer)) / 2 - 2, fallible_t()));
+    EXPECT_TRUE(n.SetCapacity((nsString::size_type(-1)/2 - sizeof(nsStringBuffer)) / 2 - 2, fallible));
-    EXPECT_TRUE(n.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(n.SetCapacity(0, fallible));
-    EXPECT_FALSE(n.SetCapacity((nsString::size_type(-1)/2 - sizeof(nsStringBuffer)) / 2 - 1, fallible_t()));
+    EXPECT_FALSE(n.SetCapacity((nsString::size_type(-1)/2 - sizeof(nsStringBuffer)) / 2 - 1, fallible));
-    EXPECT_TRUE(n.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(n.SetCapacity(0, fallible));
-    EXPECT_TRUE(n1.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(n1.SetCapacity(0, fallible));
-    EXPECT_TRUE(n1.SetCapacity((nsCString::size_type(-1)/2 - sizeof(nsStringBuffer)) / 1 - 2, fallible_t()));
+    EXPECT_TRUE(n1.SetCapacity((nsCString::size_type(-1)/2 - sizeof(nsStringBuffer)) / 1 - 2, fallible));
-    EXPECT_TRUE(n1.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(n1.SetCapacity(0, fallible));
-    EXPECT_FALSE(n1.SetCapacity((nsCString::size_type(-1)/2 - sizeof(nsStringBuffer)) / 1 - 1, fallible_t()));
+    EXPECT_FALSE(n1.SetCapacity((nsCString::size_type(-1)/2 - sizeof(nsStringBuffer)) / 1 - 1, fallible));
-    EXPECT_TRUE(n1.SetCapacity(0, fallible_t()));
+    EXPECT_TRUE(n1.SetCapacity(0, fallible));
   }
 }