diff options
Diffstat (limited to 'lib/backtrace.c')
| -rw-r--r-- | lib/backtrace.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/backtrace.c b/lib/backtrace.c index 5cb2954f8..934763448 100644 --- a/lib/backtrace.c +++ b/lib/backtrace.c @@ -15,10 +15,15 @@ */ #include <config.h> +#include <errno.h> +#include <fcntl.h> #include <inttypes.h> +#include <string.h> +#include <unistd.h> #include "backtrace.h" #include "openvswitch/vlog.h" +#include "util.h" VLOG_DEFINE_THIS_MODULE(backtrace); @@ -76,3 +81,37 @@ log_backtrace_at(const char *msg, const char *where) ds_destroy(&ds); } + +#ifdef HAVE_UNWIND +void +log_received_backtrace(int fd) { + int byte_read; + struct unw_backtrace backtrace[UNW_MAX_DEPTH]; + + VLOG_WARN("%s fd %d", __func__, fd); + fcntl(fd, F_SETFL, O_NONBLOCK); + memset(backtrace, 0, UNW_MAX_BUF); + + byte_read = read(fd, backtrace, UNW_MAX_BUF); + if (byte_read < 0) { + VLOG_ERR("Read fd %d failed: %s", fd, + ovs_strerror(errno)); + } else if (byte_read > 0) { + VLOG_WARN("SIGSEGV detected, backtrace:"); + for (int i = 0; i < UNW_MAX_DEPTH; i++) { + if (backtrace[i].func[0] == 0) { + break; + } + VLOG_WARN("0x%016lx <%s+0x%lx>\n", + backtrace[i].ip, + backtrace[i].func, + backtrace[i].offset); + } + } +} +#else /* !HAVE_UNWIND */ +void +log_received_backtrace(int daemonize_fd OVS_UNUSED) { + VLOG_WARN("Backtrace using libunwind not supported."); +} +#endif /* HAVE_UNWIND */ |