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When the system-event table is full, reuse the slot of an event the guest has destroyed instead of ending the process.

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Entries were never removed, and every reload of a save binds two events at new addresses.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
This commit is contained in:
chrg6
2026-11-10 23:24:12 -05:00
parent 4a69a38b48
commit 9be72ae9c0
1 changed files with 8 additions and 2 deletions
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10
runtime/kernel.c
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@@ -2090,8 +2090,14 @@ void kern_bind_system_event(Cpu *c, uint64_t ev, int autoclear) {
plat_mutex_lock(&g_se_lock);
int i = 0;
while (i < g_nse && g_se[i].ev != ev) i++;
if (i == g_nse) {
if (g_nse == (int)(sizeof g_se / sizeof *g_se)) rt_fatal("kern_bind_system_event: table full");
if (i == g_nse && g_nse == (int)(sizeof g_se / sizeof *g_se)) {
// Full: entries are never removed, and a long session binds events at new addresses (two per reload of a
// save). An entry whose event the guest destroyed (its state byte is 0, or its memory is gone) gives its slot.
i = 0;
while (i < g_nse && mem_readable(g_se[i].ev + SE_STATE, 1) && se_live(g_se[i].ev)) i++;
if (i == g_nse) rt_fatal("kern_bind_system_event: table full (%d live system events)", g_nse);
g_se[i].ev = ev;
} else if (i == g_nse) {
g_se[g_nse++].ev = ev;
}
g_se[i].wh = wh;