https://llvm.org/bugs/show_bug.cgi?id=25497
Bug ID: 25497
Summary: Using `__builtin_frame_address(-1)` causes infinite
loop.
Product: clang
Version: 3.7
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 15268
--> https://llvm.org/bugs/attachment.cgi?id=15268&action=edit
clang-backtrace
This simple snippet of code:
int main() {
void *x = __builtin_frame_address(-1);
}
Will cause the compiler to run infinitely, or at least until the systems'
memory limit is reached.
Obviously, __builtin_frame_address(-1) is an invalid operation and undefined
behavior, but there should probably be a better reporting mechanism than to
cause the compiler to hang.
Attached is a stack trace as provided by OSX's activity monitor sampler. Also
tested with latest trunk 3.7, unfortunately the precompiled version has no
symbol information.
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