Fix bug in exception table allocation (PR13678)
Patch by Michael Muller.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172214 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/JIT/JITEmitter.cpp b/lib/ExecutionEngine/JIT/JITEmitter.cpp
index 6fd4df4..c273876 100644
--- a/lib/ExecutionEngine/JIT/JITEmitter.cpp
+++ b/lib/ExecutionEngine/JIT/JITEmitter.cpp
@@ -969,14 +969,24 @@
SavedBufferBegin = BufferBegin;
SavedBufferEnd = BufferEnd;
SavedCurBufferPtr = CurBufferPtr;
+ uint8_t *FrameRegister;
- BufferBegin = CurBufferPtr = MemMgr->startExceptionTable(F.getFunction(),
- ActualSize);
- BufferEnd = BufferBegin+ActualSize;
- EmittedFunctions[F.getFunction()].ExceptionTable = BufferBegin;
- uint8_t *EhStart;
- uint8_t *FrameRegister = DE->EmitDwarfTable(F, *this, FnStart, FnEnd,
- EhStart);
+ while (true) {
+ BufferBegin = CurBufferPtr = MemMgr->startExceptionTable(F.getFunction(),
+ ActualSize);
+ BufferEnd = BufferBegin+ActualSize;
+ EmittedFunctions[F.getFunction()].ExceptionTable = BufferBegin;
+ uint8_t *EhStart;
+ FrameRegister = DE->EmitDwarfTable(F, *this, FnStart, FnEnd, EhStart);
+
+ // If the buffer was large enough to hold the table then we are done.
+ if (CurBufferPtr != BufferEnd)
+ break;
+
+ // Try again with twice as much space.
+ ActualSize = (CurBufferPtr - BufferBegin) * 2;
+ MemMgr->deallocateExceptionTable(BufferBegin);
+ }
MemMgr->endExceptionTable(F.getFunction(), BufferBegin, CurBufferPtr,
FrameRegister);
BufferBegin = SavedBufferBegin;