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List:       freebsd-hackers
Subject:    Re: `clang -pg` generates binary which coredumps on start
From:       Lev Serebryakov <lev () FreeBSD ! org>
Date:       2021-01-29 9:56:49
Message-ID: e6141eaa-d190-bde2-157f-49eadfd3fccd () FreeBSD ! org
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On 29.01.2021 10:47, Dimitry Andric wrote:

> > I'm trying to profile my user-level program on FreeBSD 12-STABLE (amd64). When I \
> > build it with `cc -g -pg -O3` it coredumps on start. What do I do wrong? 
> > (lldb) bt
> > * thread #1, name = 'mergenets', stop reason = signal SIGSEGV
> > * frame #0: 0x0000000000000000
> > frame #1: 0x000000000028ebbf mergenets`__vdso_gettc(th=0x00007ffffffff270, \
> > tc=0x00007fffffffddbc) at __vdso_gettc.c:0 frame #2: 0x000000000028e8c3 \
> > mergenets`binuptime [inlined] tc_delta(th=<unavailable>) at \
> > __vdso_gettimeofday.c:46:10 frame #3: 0x000000000028e8ba \
> > mergenets`binuptime(bt=0x00007fffffffde08, tk=0x00007ffffffff1b0, abs=0) at \
> > __vdso_gettimeofday.c:78 frame #4: 0x000000000028ea73 \
> > mergenets`__vdso_clock_gettime(clock_id=4, ts=0x00007fffffffde68) at \
> > __vdso_gettimeofday.c:165:10 frame #5: 0x0000000000281efb \
> > mergenets`__clock_gettime(clock_id=4, ts=0x00007fffffffde68) at \
> > clock_gettime.c:48:11 frame #6: 0x000000000024339f mergenets`nstime_update_impl \
> > [inlined] nstime_get(time=0x0000000800403a88) at jemalloc_nstime.c:128:2 frame \
> > #7: 0x0000000000243395 mergenets`nstime_update_impl(time=0x0000000800403a88) at \
> > jemalloc_nstime.c:160 frame #8: 0x0000000000234b6d mergenets`__je_arena_new \
> > [inlined] arena_decay_reinit(decay=0x0000000800403a20, decay_ms=<unavailable>) at \
> > jemalloc_arena.c:572:2 frame #9: 0x0000000000234b21 mergenets`__je_arena_new \
> > [inlined] arena_decay_init(decay=0x0000000800403a20, decay_ms=<unavailable>, \
> > stats=0x00000008004009a0) at jemalloc_arena.c:593 frame #10: 0x0000000000234b1a \
> > mergenets`__je_arena_new(tsdn=0x0000000000000000, ind=0, \
> > extent_hooks=<unavailable>) at jemalloc_arena.c:1858 frame #11: \
> > 0x00000000002239c0 mergenets`__je_arena_init [inlined] \
> > arena_init_locked(tsdn=0x0000000000000000, ind=0, \
> > extent_hooks=0x0000000000205778) at jemalloc_jemalloc.c:338:10 frame #12: \
> > 0x00000000002239b2 mergenets`__je_arena_init(tsdn=0x0000000000000000, ind=0, \
> > extent_hooks=0x0000000000205778) at jemalloc_jemalloc.c:366 frame #13: \
> > 0x000000000022f946 mergenets`malloc_init_hard_a0_locked at \
> > jemalloc_jemalloc.c:1328:6 frame #14: 0x0000000000222cf5 mergenets`a0ialloc \
> > [inlined] malloc_init_hard_a0 at jemalloc_jemalloc.c:1343:8 frame #15: \
> > 0x0000000000222caa mergenets`a0ialloc [inlined] malloc_init_a0 at \
> > jemalloc_jemalloc.c:214 frame #16: 0x0000000000222caa \
> > mergenets`a0ialloc(size=6223, zero=false, is_internal=false) at \
> > jemalloc_jemalloc.c:234 frame #17: 0x00000000002225fc \
> > mergenets`__libc_allocate_tls [inlined] malloc_aligned(size=6200, align=16) at \
> > tls.c:135:8 frame #18: 0x00000000002225e2 \
> > mergenets`__libc_allocate_tls(oldtls=0x0000000000000000, tcbsize=<unavailable>, \
> > tcbalign=<unavailable>) at tls.c:359 frame #19: 0x00000000002227d0 \
> > mergenets`_init_tls at tls.c:469:8 frame #20: 0x000000000021f234 \
> > mergenets`_start(ap=<unavailable>, cleanup=<unavailable>) at crt1.c:66:3
> 
> Likely https://bugs.freebsd.org/249121 (and maybe \
> https://bugs.llvm.org/show_bug.cgi?id=48165).

  I have r367937, and 249121 was fixed in r365654...


-- 
// Lev Serebryakov
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