sys::MemoryBlock getNewMemoryBlock(unsigned size);
std::map<const Function*, MemoryRangeHeader*> FunctionBlocks;
+ std::map<const Function*, MemoryRangeHeader*> TableBlocks;
public:
DefaultJITMemoryManager();
~DefaultJITMemoryManager();
FreeMemoryList =CurBlock->TrimAllocationToSize(FreeMemoryList, BlockSize);
}
+ /// startExceptionTable - Use startFunctionBody to allocate memory for the
+ /// function's exception table.
+ unsigned char* startExceptionTable(const Function* F, uintptr_t &ActualSize) {
+ return startFunctionBody(F, ActualSize);
+ }
+
+ /// endExceptionTable - The exception table of F is now allocated,
+ /// and takes the memory in the range [TableStart,TableEnd).
+ void endExceptionTable(const Function *F, unsigned char *TableStart,
+ unsigned char *TableEnd,
+ unsigned char* FrameRegister) {
+ assert(TableEnd > TableStart);
+ assert(TableStart == (unsigned char *)(CurBlock+1) &&
+ "Mismatched table start/end!");
+
+ uintptr_t BlockSize = TableEnd - (unsigned char *)CurBlock;
+ TableBlocks[F] = CurBlock;
+
+ // Release the memory at the end of this block that isn't needed.
+ FreeMemoryList =CurBlock->TrimAllocationToSize(FreeMemoryList, BlockSize);
+ }
+
unsigned char *getGOTBase() const {
return GOTBase;
}
// Finally, remove this entry from FunctionBlocks.
FunctionBlocks.erase(I);
+
+ I = TableBlocks.find(F);
+ if (I == TableBlocks.end()) return;
+
+ // Find the block that is allocated for this function.
+ MemRange = I->second;
+ assert(MemRange->ThisAllocated && "Block isn't allocated!");
+
+ // Fill the buffer with garbage!
+#ifndef NDEBUG
+ memset(MemRange+1, 0xCD, MemRange->BlockSize-sizeof(*MemRange));
+#endif
+
+ // Free the memory.
+ FreeMemoryList = MemRange->FreeBlock(FreeMemoryList);
+
+ // Finally, remove this entry from TableBlocks.
+ TableBlocks.erase(I);
}
};
}