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MDEV-28884: include kernel information in crashing signal handler

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Recent adventures in liburing and btrfs have shown up some kernel
version dependent bugs. Having a bug report of accurace kernel version
can start to correlate these errors sooner.

On Linux, /proc/version contains the kernel version.

FreeBSD has kern.version (per man 8 sysctl), so include that too.

Example output:

Max nice priority         0                    0
Max realtime priority     0                    0
Max realtime timeout      unlimited            unlimited            us
Core pattern: |/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h

Kernel version: Linux version 5.19.0-0.rc2.21.fc37.x86_64 (mockbuild@bkernel01.iad2.fedoraproject.org) (gcc (GCC) 12.1.1 20220507 (Red Hat 12.1.1-1), GNU ld version 2.38-14.fc37) #1 SMP PREEMPT_DYNAMIC Mon Jun 13 15:27:24 UTC 2022

Segmentation fault (core dumped)
This commit is contained in:
Daniel Black 2022-06-18 17:42:29 +03:00
parent f299351e1c
commit d4539426bc
1 changed files with 10 additions and 0 deletions
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10
sql/signal_handler.cc
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@ -81,6 +81,12 @@ static inline void output_core_info()
my_safe_printf_stderr("Core pattern: %.*s\n", (int) len, buff);
my_close(fd, MYF(0));
}
if ((fd= my_open("/proc/version", O_RDONLY, MYF(0))) >= 0)
{
len= my_read(fd, (uchar*)buff, sizeof(buff), MYF(0));
my_safe_printf_stderr("Kernel version: %.*s\n", (int) len, buff);
my_close(fd, MYF(0));
}
#endif
#elif defined(__APPLE__) || defined(__FreeBSD__)
char buff[PATH_MAX];
@ -89,6 +95,10 @@ static inline void output_core_info()
{
my_safe_printf_stderr("Core pattern: %.*s\n", (int) len, buff);
}
if (sysctlbyname("kern.version", buff, &len, NULL, 0) == 0)
{
my_safe_printf_stderr("Kernel version: %.*s\n", (int) len, buff);
}
#else
char buff[80];
my_getwd(buff, sizeof(buff), 0);