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libafl_force_dfl

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This commit is contained in:
Andrea Fioraldi 2023-10-31 17:15:02 +01:00
parent 6c18347739
commit 852160396b
1 changed files with 17 additions and 1 deletions
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18
linux-user/signal.c
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@ -1204,6 +1204,12 @@ int do_sigaction(int sig, const struct target_sigaction *act,
return ret; return ret;
} }
//// --- Start LibAFL code ---
int libafl_force_dfl = 0;
//// --- End LibAFL code ---
static void handle_pending_signal(CPUArchState *cpu_env, int sig, static void handle_pending_signal(CPUArchState *cpu_env, int sig,
struct emulated_sigtable *k) struct emulated_sigtable *k)
{ {
@ -1231,7 +1237,17 @@ static void handle_pending_signal(CPUArchState *cpu_env, int sig,
print_taken_signal(sig, &k->info); print_taken_signal(sig, &k->info);
} }
if (handler == TARGET_SIG_DFL) { //// --- Start LibAFL code ---
int ignore_handling = 0;
if (libafl_force_dfl && (sig == SIGABRT || sig == SIGABRT|| sig == SIGSEGV
|| sig == SIGILL || sig == SIGBUS)) {
ignore_handling = 1;
}
//// --- End LibAFL code ---
if (handler == TARGET_SIG_DFL || ignore_handling) {
/* default handler : ignore some signal. The other are job control or fatal */ /* default handler : ignore some signal. The other are job control or fatal */
if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) { if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
kill(getpid(),SIGSTOP); kill(getpid(),SIGSTOP);