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LibWasm: Catch SIGFPE on jitted code too

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SIGFPE can happen if we emit a bare idiv.
This commit is contained in:
Ali Mohammad Pur 2026-06-15 13:05:02 +02:00 committed by Ali Mohammad Pur
parent fc740068d2
commit 340d87efd6
1 changed files with 5 additions and 1 deletions
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6
Libraries/LibWasm/AbstractMachine/BytecodeInterpreter.cpp
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@ -139,6 +139,7 @@ static void install_compiled_fault_handlers()
static struct sigaction s_old_sigsegv;
static struct sigaction s_old_sigbus;
static struct sigaction s_old_sigill;
static struct sigaction s_old_sigfpe;
[[noreturn]] static void chain_fault_signal(int signal, siginfo_t* info, void* context, struct sigaction const& previous_action)
{
@ -198,7 +199,7 @@ static void compiled_fault_signal_handler(int signal, siginfo_t* info, void* con
return;
}
if (recovery && signal == SIGILL) {
if (recovery && (signal == SIGILL || signal == SIGFPE)) {
# if defined(AK_OS_MACOS)
# if ARCH(AARCH64)
auto pc = static_cast<FlatPtr>(uc->uc_mcontext->__ss.__pc);
@ -240,6 +241,8 @@ static void compiled_fault_signal_handler(int signal, siginfo_t* info, void* con
chain_fault_signal(signal, info, context, s_old_sigsegv);
if (signal == SIGILL)
chain_fault_signal(signal, info, context, s_old_sigill);
if (signal == SIGFPE)
chain_fault_signal(signal, info, context, s_old_sigfpe);
chain_fault_signal(signal, info, context, s_old_sigbus);
}
@ -256,6 +259,7 @@ static void install_compiled_fault_handlers()
sigaction(SIGSEGV, &action, &s_old_sigsegv);
sigaction(SIGBUS, &action, &s_old_sigbus);
sigaction(SIGILL, &action, &s_old_sigill);
sigaction(SIGFPE, &action, &s_old_sigfpe);
}
# endif