diff options
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu.inc | 1 | ||||
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/cpus.c-qemu_cpu_kick_thread_debugging.patch | 76 |
2 files changed, 77 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc index c3f73d1ec5..8c1e77940e 100644 --- a/meta/recipes-devtools/qemu/qemu.inc +++ b/meta/recipes-devtools/qemu/qemu.inc @@ -25,6 +25,7 @@ SRC_URI = "\ SRC_URI_append_class-native = "\ file://fix-libcap-header-issue-on-some-distro.patch \ + file://cpus.c-qemu_cpu_kick_thread_debugging.patch \ " EXTRA_OECONF += "--target-list=${@get_qemu_target_list(d)} --disable-werror --disable-bluez --disable-libiscsi --with-system-pixman --extra-cflags='${CFLAGS}'" diff --git a/meta/recipes-devtools/qemu/qemu/cpus.c-qemu_cpu_kick_thread_debugging.patch b/meta/recipes-devtools/qemu/qemu/cpus.c-qemu_cpu_kick_thread_debugging.patch new file mode 100644 index 0000000000..6822132541 --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/cpus.c-qemu_cpu_kick_thread_debugging.patch @@ -0,0 +1,76 @@ +From 697a834c35d19447b7dcdb9e1d9434bc6ce17c21 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?An=C3=ADbal=20Lim=C3=B3n?= <anibal.limon@linux.intel.com> +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 <anibal.limon@linux.intel.com> +--- + cpus.c | 5 +++++ + custom_debug.h | 24 ++++++++++++++++++++++++ + 2 files changed, 29 insertions(+) + create mode 100644 custom_debug.h + +diff --git a/cpus.c b/cpus.c +index a822ce3..7e4786e 100644 +--- a/cpus.c ++++ b/cpus.c +@@ -1080,6 +1080,8 @@ static void *qemu_tcg_cpu_thread_fn(void *arg) + return NULL; + } + ++#include "custom_debug.h" ++ + static void qemu_cpu_kick_thread(CPUState *cpu) + { + #ifndef _WIN32 +@@ -1088,6 +1090,9 @@ static void qemu_cpu_kick_thread(CPUState *cpu) + 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 */ +diff --git a/custom_debug.h b/custom_debug.h +new file mode 100644 +index 0000000..f029e45 +--- /dev/null ++++ b/custom_debug.h +@@ -0,0 +1,24 @@ ++#include <execinfo.h> ++#include <stdio.h> ++#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); ++} +-- +1.9.1 + |