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authorJosé Bollo <jose.bollo@iot.bzh>2019-02-15 17:40:04 +0100
committerJosé Bollo <jose.bollo@iot.bzh>2019-04-02 09:58:49 +0200
commit50deefa0f08b88b99748abd57560222744d2f8db (patch)
treeb8ff1f758168487e3c34eea9b3445306eb41b66f /README.md
parent8214e88a036ca06a9a2ba2348e99df4de8bb8940 (diff)
Workaround an exit issue
When running gcov the running script is sometime blocking. GDB tells: Thread 1 (Thread 0x7ff14e783b40 (LWP 1318)): #0 0x00007ff14ccf334c in __lll_lock_wait_private () from /lib64/libc.so.6 #1 0x00007ff14cc70598 in malloc () from /lib64/libc.so.6 #2 0x000000000046523a in gcov_do_dump () #3 0x00000000004653f4 in __gcov_exit () #4 0x00000000004632df in _GLOBAL__sub_D_00100_1_wrap_json_get_error_position () at ../../src/wrap-json.c:1250 #5 0x00007ff14e5b5916 in _dl_fini () from /lib64/ld-linux-x86-64.so.2 #6 0x00007ff14cc255ec in __run_exit_handlers () from /lib64/libc.so.6 #7 0x00007ff14cc2571c in exit () from /lib64/libc.so.6 #8 0x00000000004069fc in on_sigchld (signum=17, info=0x7ffc3f43fa70, uctx=0x7ffc3f43f940) at ../../src/main-afb-daemon.c:411 #9 <signal handler called> #10 0x00007ff14cc6e527 in _int_malloc () from /lib64/libc.so.6 #11 0x00007ff14cc710a2 in calloc () from /lib64/libc.so.6 #12 0x00007ff14d454ff7 in json_object_new_int () from /lib64/libjson-c.so.4 ... It means that allocating memory in exit handlers can block! The work around here is to force the daemon to exit properly, i.e., not in a signal handler, by calling hello/exit from test script -at the very end-. Change-Id: Iee289fb1af8479628df895aac7eb021cedda4f2c Signed-off-by: José Bollo <jose.bollo@iot.bzh>
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