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Fix use-of-uninitialized value when RWX memory can't be allocated (PR6701).
SELinux doesn't allow 'execmem', returning MAP_FAILED and 'Permission denied' for mmap or RWX memory. In this case AllocateRWX was returning a MemoryBlock with uninitialized fields, which sometimes caused crashes. This patch initializes MemoryBlock fields to 0, so that the RWX-failure check works. It doesn't fix the SELinux 'execmem' issues though (the JIT will not work when SELinux is in enforcing mode). llvm-svn: 99762
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@ -27,7 +27,7 @@ namespace sys {
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/// @brief Memory block abstraction.
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class MemoryBlock {
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public:
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MemoryBlock() { }
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MemoryBlock() : Address(0), Size(0) { }
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MemoryBlock(void *addr, size_t size) : Address(addr), Size(size) { }
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void *base() const { return Address; }
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size_t size() const { return Size; }
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