From edc8dba74c7a4a2121d76c982be0074183bf080a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?An=C3=ADbal=20Lim=C3=B3n?= Date: Wed, 12 Aug 2015 15:11:30 -0500 Subject: [PATCH] cpus.c: Add error messages when qemi_cpu_kick_thread fails. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add custom_debug.h with function for print backtrace information. When pthread_kill fails in qemu_cpu_kick_thread display backtrace and current cpu information. Upstream-Status: Inappropriate Signed-off-by: Aníbal Limón --- cpus.c | 5 +++++ custom_debug.h | 24 ++++++++++++++++++++++++ 2 files changed, 29 insertions(+) create mode 100644 custom_debug.h Index: qemu-3.0.0/cpus.c =================================================================== --- qemu-3.0.0.orig/cpus.c +++ qemu-3.0.0/cpus.c @@ -1693,6 +1693,8 @@ static void *qemu_tcg_cpu_thread_fn(void return NULL; } +#include "custom_debug.h" + static void qemu_cpu_kick_thread(CPUState *cpu) { #ifndef _WIN32 @@ -1705,6 +1707,9 @@ static void qemu_cpu_kick_thread(CPUStat err = pthread_kill(cpu->thread->thread, SIG_IPI); if (err) { fprintf(stderr, "qemu:%s: %s", __func__, strerror(err)); + fprintf(stderr, "CPU #%d:\n", cpu->cpu_index); + cpu_dump_state(cpu, stderr, fprintf, 0); + backtrace_print(); exit(1); } #else /* _WIN32 */ Index: qemu-3.0.0/custom_debug.h =================================================================== --- /dev/null +++ qemu-3.0.0/custom_debug.h @@ -0,0 +1,24 @@ +#include +#include +#define BACKTRACE_MAX 128 +static void backtrace_print(void) +{ + int nfuncs = 0; + void *buf[BACKTRACE_MAX]; + char **symbols; + int i; + + nfuncs = backtrace(buf, BACKTRACE_MAX); + + symbols = backtrace_symbols(buf, nfuncs); + if (symbols == NULL) { + fprintf(stderr, "backtrace_print failed to get symbols"); + return; + } + + fprintf(stderr, "Backtrace ...\n"); + for (i = 0; i < nfuncs; i++) + fprintf(stderr, "%s\n", symbols[i]); + + free(symbols); +}