forked from OSchip/llvm-project
84d4618659
when it detects undefined behavior. llvm.trap generally codegens into some
thing really small (e.g. a 2 byte ud2 instruction on x86) and debugging this
sort of thing is "nontrivial". For example, we now compile:
void foo() { *(int*)0 = 42; }
into:
_foo:
pushl %ebp
movl %esp, %ebp
ud2
Some may even claim that this is a security hole, though that seems dubious
to me. This addresses rdar://7958343 - Optimizing away null dereference
potentially allows arbitrary code execution
llvm-svn: 103356
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| AsmParser | ||
| Bitcode | ||
| CodeGen | ||
| CompilerDriver | ||
| ExecutionEngine | ||
| Linker | ||
| MC | ||
| Support | ||
| System | ||
| Target | ||
| Transforms | ||
| VMCore | ||
| Makefile | ||