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Rework fuzzer signal handling

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This commit is contained in:
Andrea Fioraldi 2023-10-03 14:04:15 +02:00
parent a6601761f6
commit ead06288fd
1 changed files with 13 additions and 0 deletions
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13
linux-user/signal.c
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@ -693,6 +693,13 @@ void cpu_loop_exit_sigbus(CPUState *cpu, target_ulong addr,
cpu_loop_exit_restore(cpu, ra); cpu_loop_exit_restore(cpu, ra);
} }
//// --- Begin LibAFL code ---
__attribute__((weak)) void libafl_executor_reinstall_handlers(void);
__attribute__((weak)) void libafl_executor_reinstall_handlers(void) {}
//// --- End LibAFL code ---
/* abort execution with signal */ /* abort execution with signal */
static G_NORETURN static G_NORETURN
void dump_core_and_abort(CPUArchState *cpu_env, int target_sig) void dump_core_and_abort(CPUArchState *cpu_env, int target_sig)
@ -737,6 +744,12 @@ void dump_core_and_abort(CPUArchState *cpu_env, int target_sig)
act.sa_flags = 0; act.sa_flags = 0;
// sigaction(host_sig, &act, NULL); // LibAFL uses it's own handler // sigaction(host_sig, &act, NULL); // LibAFL uses it's own handler
//// --- Begin LibAFL code ---
libafl_executor_reinstall_handlers();
//// --- End LibAFL code ---
/* For some reason raise(host_sig) doesn't send the signal when /* For some reason raise(host_sig) doesn't send the signal when
* statically linked on x86-64. */ * statically linked on x86-64. */
kill(getpid(), host_sig); kill(getpid(), host_sig);