https://bugs.llvm.org/show_bug.cgi?id=39641
Bug ID: 39641
Summary: asan hangs at exception
Product: compiler-rt
Version: 6.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: asan
Assignee: unassignedb...@nondot.org
Reporter: s...@list.ru
CC: llvm-bugs@lists.llvm.org
Created attachment 21114
--> https://bugs.llvm.org/attachment.cgi?id=21114&action=edit
test case
Hello.
Attached is a test-case for the problem.
If some C++ shlib is dlopen()ed by the C program,
and then this shlib throws an exception (that it
also catches of course - invisible to the C code),
then asan fails to find __cxa_throw, and calls the
__asan_handle_no_return() in an infinite loop.
Another bug here is that it is not possible to
see the symbols of asan functions:
---
(gdb) bt
#0 0x00000000004e6bf9 in __asan::AsanThread::stack_top() ()
#1 0x00000000004e4785 in __asan_handle_no_return ()
#2 0x000000000043304c in __interceptor___cxa_throw ()
#3 0x00007ffff40fea9f in foo () at shlib.cpp:4
#4 0x00007ffff40fe97d in bar () at shlib.cpp:13
#5 0x00000000005121eb in main () at main.c:11
---
... even though everything was compiled with debug info.
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