http://llvm.org/bugs/show_bug.cgi?id=13918
Bug #: 13918
Summary: __builtin_setjmp is not compatible with GCC
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 9256
--> http://llvm.org/bugs/attachment.cgi?id=9256
Test case
The __builtin_setjmp function does different things on Clang compared to GCC.
On Clang only the stack pointer and frame pointer are saved, while GCC also
saves the resume address that is used to longjmp back.
A test case is attached, based on the below test from GCC
http://gcc.gnu.org/viewcvs/trunk/gcc/testsuite/gcc.c-torture/execute/built-in-setjmp.c?revision=184997&view=markup
When compiled using GCC 4.6.3 (gcc __builtin_setjmp-test.c) the test program
returns 1, as expected.
When compiled using Clang 3.2 (clang __builtin_setjmp-test.c) the test program
segfaults.
Since the __builtin_setjmp function is supposed to be compatible with GCC, this
is a problem.
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