https://llvm.org/bugs/show_bug.cgi?id=31003
Bug ID: 31003
Summary: StackProtector pass crashes when module compiled twice
Product: libraries
Version: trunk
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: Common Code Generator Code
Assignee: unassignedb...@nondot.org
Reporter: 1101.deb...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
StackProtector::InsertStackProtectors has the following code (simplified):
AllocaInstr *AI = nullptr;
if (HasPrologue == false) {
CreatePrologue(AI);
}
AI->FooBar()
However, when the prologue already exists, then AI is not initialized, which
lead to a crash.
So far I managed to reproduce it only by compiling a module twice using ORC's
compiler with optimizations disabled.
But it should be clear that code has problem.
Problematic code was introduced with this commit:
https://github.com/llvm-mirror/llvm/commit/1a7750eecd21d052a69faa43cadefe3215d4f920
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