Revision 603e4fd7 linux-user/signal.c
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#include <unistd.h> |
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#include <signal.h> |
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#include <errno.h> |
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#include <assert.h> |
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#include <sys/ucontext.h> |
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#include "qemu.h" |
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static void QEMU_NORETURN force_sig(int sig) |
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{
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int host_sig; |
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struct sigaction act; |
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host_sig = target_to_host_signal(sig); |
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fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n", |
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sig, strsignal(host_sig)); |
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#if 1 |
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gdb_signalled(thread_env, sig); |
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_exit(-host_sig); |
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#else |
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{
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struct sigaction act; |
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sigemptyset(&act.sa_mask); |
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act.sa_flags = SA_SIGINFO; |
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act.sa_sigaction = SIG_DFL; |
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sigaction(SIGABRT, &act, NULL); |
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abort(); |
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} |
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#endif |
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/* The proper exit code for dieing from an uncaught signal is |
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* -<signal>. The kernel doesn't allow exit() or _exit() to pass |
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* a negative value. To get the proper exit code we need to |
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* actually die from an uncaught signal. Here the default signal |
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* handler is installed, we send ourself a signal and we wait for |
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* it to arrive. */ |
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sigfillset(&act.sa_mask); |
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act.sa_handler = SIG_DFL; |
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sigaction(host_sig, &act, NULL); |
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/* For some reason raise(host_sig) doesn't send the signal when |
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* statically linked on x86-64. */ |
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kill(getpid(), host_sig); |
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/* Make sure the signal isn't masked (just reuse the mask inside |
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of act) */ |
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sigdelset(&act.sa_mask, host_sig); |
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sigsuspend(&act.sa_mask); |
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/* unreachable */ |
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assert(0); |
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} |
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/* queue a signal so that it will be send to the virtual CPU as soon |
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