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linux-user: Trace wait4()'s and waitpid()'s wstatus

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Borrow the code for formatting the most frequent WIFEXITED() and
WIFSIGNALED() special cases from from the strace's printstatus().

Output examples:

    474729 wait4(-1,0x7f00767ff0a0,0,(nil)) = 474733 (wstatus={WIFEXITED(s) && WEXITSTATUS(s) == 1})
    475833 wait4(-1,0x7f7de61ff0a0,0,(nil)) = 475837 (wstatus={WIFSIGNALED(s) && WTERMSIG(s) == SIGKILL})
    1168 waitpid(1171,0x7f44eea00340,0) = 1171 (wstatus={WIFSIGNALED(s) && WTERMSIG(s) == SIGKILL})

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-ID: <20241001193244.14939-1-iii@linux.ibm.com>
[rth: Drop extra output for NULL wstatus or error reading.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Ilya Leoshkevich 2024-10-01 21:32:08 +02:00 • committed by Richard Henderson
parent 9729930344
commit 322bfaa2ea
2 changed files with 61 additions and 2 deletions
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6
linux-user/strace.list
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@ -1662,13 +1662,15 @@
{ TARGET_NR_vserver, "vserver" , NULL, NULL, NULL },
#endif
#ifdef TARGET_NR_wait4
{ TARGET_NR_wait4, "wait4" , "%s(%d,%p,%d,%p)", NULL, NULL },
{ TARGET_NR_wait4, "wait4" , "%s(%d,%p,%d,%p)", NULL,
print_syscall_ret_wait4 },
#endif
#ifdef TARGET_NR_waitid
{ TARGET_NR_waitid, "waitid" , "%s(%#x,%d,%p,%#x)", NULL, NULL },
#endif
#ifdef TARGET_NR_waitpid
{ TARGET_NR_waitpid, "waitpid" , "%s(%d,%p,%#x)", NULL, NULL },
{ TARGET_NR_waitpid, "waitpid", "%s(%d,%p,%#x)", NULL,
print_syscall_ret_waitpid },
#endif
#ifdef TARGET_NR_write
{ TARGET_NR_write, "write" , "%s(%d,%#x,%d)", NULL, NULL },