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Teach the RtDyld to tell the memory manager about how much space a function

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actually takes rather than how much memory was allocated for it. This
is more accurate and should help the manager pack things more effectively.

llvm-svn: 131305
This commit is contained in:
Jim Grosbach 2011-05-13 20:12:14 +00:00
parent 9df62fe3e4
commit ed5d966802
1 changed files with 4 additions and 3 deletions
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7
lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
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@ -129,18 +129,19 @@ void RuntimeDyldImpl::extractFunction(StringRef Name, uint8_t *StartAddress,
uint8_t *EndAddress) {
// Allocate memory for the function via the memory manager.
uintptr_t Size = EndAddress - StartAddress + 1;
uint8_t *Mem = MemMgr->startFunctionBody(Name.data(), Size);
uintptr_t AllocSize = Size;
uint8_t *Mem = MemMgr->startFunctionBody(Name.data(), AllocSize);
assert(Size >= (uint64_t)(EndAddress - StartAddress + 1) &&
"Memory manager failed to allocate enough memory!");
// Copy the function payload into the memory block.
memcpy(Mem, StartAddress, EndAddress - StartAddress + 1);
memcpy(Mem, StartAddress, Size);
MemMgr->endFunctionBody(Name.data(), Mem, Mem + Size);
// Remember where we put it.
Functions[Name] = sys::MemoryBlock(Mem, Size);
// Default the assigned address for this symbol to wherever this
// allocated it.
SymbolTable[Name] = Mem;
DEBUG(dbgs() << " allocated to " << Mem << "\n");
DEBUG(dbgs() << " allocated to [" << Mem << ", " << Mem + Size << "]\n");
}
bool RuntimeDyldImpl::