diff options
| -rw-r--r-- | sql/signal_handler.cc | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/sql/signal_handler.cc b/sql/signal_handler.cc index 68e801d5885..6c0220b1254 100644 --- a/sql/signal_handler.cc +++ b/sql/signal_handler.cc @@ -30,6 +30,10 @@ #define SIGNAL_FMT "signal %d" #endif +#ifndef PATH_MAX +#define PATH_MAX 4096 +#endif + /* We are handling signals/exceptions in this file. Any global variables we read should be 'volatile sig_atomic_t' @@ -44,6 +48,43 @@ extern volatile sig_atomic_t ld_assume_kernel_is_set; extern const char *optimizer_switch_names[]; +static inline void output_core_info() +{ + /* proc is optional on some BSDs so it can't hurt to look */ +#ifdef HAVE_READLINK + char buff[PATH_MAX]; + ssize_t len; + int fd; + if ((len= readlink("/proc/self/cwd", buff, sizeof(buff))) >= 0) + { + my_safe_printf_stderr("Writing a core file...\nWorking directory at %.*s\n", + (int) len, buff); + } + if ((fd= my_open("/proc/self/limits", O_RDONLY, MYF(0))) >= 0) + { + my_safe_printf_stderr("Resource Limits:\n"); + while ((len= my_read(fd, (uchar*)buff, sizeof(buff), MYF(0))) > 0) + { + my_write_stderr(buff, len); + } + my_close(fd, MYF(0)); + } +#ifdef __linux__ + if ((fd= my_open("/proc/sys/kernel/core_pattern", O_RDONLY, MYF(0))) >= 0) + { + len= my_read(fd, (uchar*)buff, sizeof(buff), MYF(0)); + my_safe_printf_stderr("Core pattern: %.*s\n", (int) len, buff); + my_close(fd, MYF(0)); + } +#endif +#else + char buff[80]; + my_getwd(buff, sizeof(buff), 0); + my_safe_printf_stderr("Writing a core file at %s\n", buff); + fflush(stderr); +#endif +} + /** * Handler for fatal signals on POSIX, exception handler on Windows. * @@ -295,13 +336,10 @@ extern "C" sig_handler handle_fatal_signal(int sig) } #endif + output_core_info(); #ifdef HAVE_WRITE_CORE if (test_flags & TEST_CORE_ON_SIGNAL) { - char buff[80]; - my_getwd(buff, sizeof(buff), 0); - my_safe_printf_stderr("Writing a core file at %s\n", buff); - fflush(stderr); my_write_core(sig); } #endif |