diff options
Diffstat (limited to 'linux-user/signal.c')
| -rw-r--r-- | linux-user/signal.c | 40 |
1 files changed, 37 insertions, 3 deletions
diff --git a/linux-user/signal.c b/linux-user/signal.c index 371927e2a..6a34171aa 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -27,6 +27,7 @@ #include <errno.h> #include <assert.h> #include <sys/ucontext.h> +#include <sys/resource.h> #include "qemu.h" #include "qemu-common.h" @@ -287,6 +288,23 @@ static int fatal_signal (int sig) } } +/* returns 1 if given signal should dump core if not handled */ +static int core_dump_signal(int sig) +{ + switch (sig) { + case TARGET_SIGABRT: + case TARGET_SIGFPE: + case TARGET_SIGILL: + case TARGET_SIGQUIT: + case TARGET_SIGSEGV: + case TARGET_SIGTRAP: + case TARGET_SIGBUS: + return (1); + default: + return (0); + } +} + void signal_init(void) { struct sigaction act; @@ -352,13 +370,29 @@ static inline void free_sigqueue(CPUState *env, struct sigqueue *q) /* abort execution with signal */ static void QEMU_NORETURN force_sig(int sig) { - int host_sig; + TaskState *ts = (TaskState *)thread_env->opaque; + int host_sig, core_dumped = 0; struct sigaction act; host_sig = target_to_host_signal(sig); - fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n", - sig, strsignal(host_sig)); gdb_signalled(thread_env, sig); + /* dump core if supported by target binary format */ + if (core_dump_signal(sig) && (ts->bprm->core_dump != NULL)) { + stop_all_tasks(); + core_dumped = + ((*ts->bprm->core_dump)(sig, thread_env) == 0); + } + if (core_dumped) { + /* we already dumped the core of target process, we don't want + * a coredump of qemu itself */ + struct rlimit nodump; + getrlimit(RLIMIT_CORE, &nodump); + nodump.rlim_cur=0; + setrlimit(RLIMIT_CORE, &nodump); + (void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n", + sig, strsignal(host_sig), "core dumped" ); + } + /* The proper exit code for dieing from an uncaught signal is * -<signal>. The kernel doesn't allow exit() or _exit() to pass * a negative value. To get the proper exit code we need to |