Date: Fri, 25 Sep 2015 13:51:38 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 203333] libexecinfo from base has trouble walking a simple stack Message-ID: <bug-203333-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203333 Bug ID: 203333 Summary: libexecinfo from base has trouble walking a simple stack Product: Base System Version: 10.1-STABLE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: freebsd-bugs@FreeBSD.org Reporter: saper@saper.info security/tor-devel ports has a simple test case in C to check for correctness of the backtrace() reporting: https://gitweb.torproject.org/tor.git/tree/src/test/test_bt.sh https://gitweb.torproject.org/tor.git/tree/src/test/test_bt_cl.c https://gitweb.torproject.org/tor.git/tree/src/test/bt_test.py One needs https://trac.torproject.org/projects/tor/ticket/17151 applied to make sure tor's configure considers using external -lexecinfo When linking the test code against libexecinfo from base (using 10.1 amd64 r283908) a truncated result appears, because there is an unused reserved space on the stack: $ ./src/test/test-bt-cl crash ============================================================ T= 1443178736 Tor died: Caught signal 11 0x102c92d <clean_up_backtrace_handler+0x8d> at /home/saper/sw/tor/src/test/test-bt-cl 0x8016a8997 <pthread_sigmask+0x497> at /lib/libthr.so.3 0x102c205 <crash+0x25> at /home/saper/sw/tor/src/test/test-bt-cl instead of > env LD_LIBRARY_PATH=/usr/local/lib ./src/test/test-bt-cl crash ============================================================ T= 1443178868 Tor died: Caught signal 11 0x8016a8997 <pthread_sigmask+1175> at /lib/libthr.so.3 0x8016a81a8 <pthread_getspecific+3544> at /lib/libthr.so.3 0x102c205 <crash+37> at /home/saper/sw/tor/src/test/test-bt-cl 0x102c27f <oh_what+31> at /home/saper/sw/tor/src/test/test-bt-cl 0x102c2cf <a_tangled_web+31> at /home/saper/sw/tor/src/test/test-bt-cl 0x102c31f <we_weave+31> at /home/saper/sw/tor/src/test/test-bt-cl 0x102c462 <main+274> at /home/saper/sw/tor/src/test/test-bt-cl 0x102c0f1 <_start+417> at /home/saper/sw/tor/src/test/test-bt-cl when using libexecinfo from ports. Is it possible to update libexecinfo in base to fix this problem? See also * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200778 * https://trac.torproject.org/projects/tor/ticket/17151 -- You are receiving this mail because: You are the assignee for the bug.
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