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[JIT/Memory] Fix up semantic of setExecutable(). 

setExecutable() should do everything that's needed to make the memory
executable on host, i.e. unconditionally set permissions + invalidate
instruction cache. llvm-rtdyld will be updated in my next commit.

Discusseed with: Lang Hames (as part of D13631).

llvm-svn: 253341
This commit is contained in:
Davide Italiano 2015-11-17 16:34:28 +00:00
parent 6c1b0b9a88
commit 7f9f835cfb
1 changed files with 1 additions and 4 deletions
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5
llvm/lib/Support/Unix/Memory.inc
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@ -264,15 +264,12 @@ bool Memory::setWritable (MemoryBlock &M, std::string *ErrMsg) {
}
bool Memory::setExecutable (MemoryBlock &M, std::string *ErrMsg) {
#if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
if (M.Address == 0 || M.Size == 0) return false;
Memory::InvalidateInstructionCache(M.Address, M.Size);
#if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)M.Address,
(vm_size_t)M.Size, 0, VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_COPY);
return KERN_SUCCESS == kr;
#elif defined(__arm__) || defined(__aarch64__)
Memory::InvalidateInstructionCache(M.Address, M.Size);
return true;
#else
return true;
#endif