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Provider liveness walk opt-in (GEXMONO_LIVENESS=1) until the HK Instantiate crash is understood

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Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_461fe3ff06374ecba693831148697ba6
This commit is contained in:
velzieandClaude Opus 5.5 committed 2026-10-06 04:53:18 -04:00
1 parent 279ba9c00e
commit 55c3197f62
1 file changed
+17 -4
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tools/unity-dotnet/mono/host/gexmono-unity.c
+17 -4
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@@ -350,7 +350,8 @@ void sgen_gc_lock (void);
void sgen_gc_unlock (void);
static int lv_env (const char *name) { const char *v = getenv (name); return v && *v && strcmp (v, "0"); }
static void lv_pass_reset (void);
U(mono_unity_stop_gc_world) { ENTER; lv_pass_reset (); if (!gc_world_stopped && !lv_env ("GEXMONO_LV_NOLOCK")) { sgen_gc_lock (); gc_world_stopped = 1; } RETV; }
static int lv_on (void);
U(mono_unity_stop_gc_world) { ENTER; lv_pass_reset (); if (!gc_world_stopped && lv_on () && !lv_env ("GEXMONO_LV_NOLOCK")) { sgen_gc_lock (); gc_world_stopped = 1; } RETV; }
U(mono_unity_start_gc_world) { ENTER; if (gc_world_stopped) { gc_world_stopped = 0; sgen_gc_unlock (); } RETV; }
U(mono_unity_heap_validation_from_statics) { ENTER; RETV; }
@@ -403,6 +404,18 @@ lv_new (MonoClass *filter, guint32 max, uint64_t cb, uint64_t data)
}
static int lv_env (const char *name);
/* The walk is opt-in (GEXMONO_LIVENESS=1) until the Instantiate crash it
* exposes in Hollow Knight is understood (docs/unity-dotnet.md §12); off, the
* provider reports nothing, as before. GEXMONO_LV_OFF=1 walks but reports
* nothing. */
static int
lv_on (void)
{
static int on = -1;
if (on < 0)
on = lv_env ("GEXMONO_LIVENESS");
return on;
}
static void
lv_flush (Liveness *s)
{
@@ -598,7 +611,7 @@ U(mono_unity_liveness_calculation_from_root)
{
ENTER;
Liveness *s = (Liveness *)P (1);
if (s) {
if (s && lv_on ()) {
lv_push (s, (MonoObject *)P (0));
lv_drain (s);
}
@@ -608,14 +621,14 @@ U(mono_unity_liveness_calculation_from_statics)
{
ENTER;
Liveness *s = (Liveness *)P (0);
if (s) {
if (s && lv_on ()) {
mono_assembly_foreach (lv_assembly_statics, s);
lv_drain (s);
}
RETV;
}
U(mono_unity_liveness_start_gc_world) { ENTER; if (lv_world_stopped) { lv_world_stopped = 0; sgen_gc_unlock (); } RETV; }
U(mono_unity_liveness_stop_gc_world) { ENTER; lv_pass_reset (); if (!lv_world_stopped) { sgen_gc_lock (); lv_world_stopped = 1; } RETV; }
U(mono_unity_liveness_stop_gc_world) { ENTER; lv_pass_reset (); if (!lv_world_stopped && lv_on ()) { sgen_gc_lock (); lv_world_stopped = 1; } RETV; }
U(mono_unity_managed_callstack) { ENTER; RET (0); }
U(mono_unity_lock_dynamic_function_access_tables64) { ENTER; RETV; }
U(mono_unity_unlock_dynamic_function_access_tables64) { ENTER; RETV; }