From: notaz <notasas@gmail.com>
Date: Sun, 22 Feb 2026 23:40:13 +0000 (+0200)
Subject: 3ds: use proper stack size for drc thread
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fc318b2398b2686509e66ad24dfec13f52684915;p=pcsx_rearmed.git

3ds: use proper stack size for drc thread
---

diff --git a/frontend/pcsxr-threads.c b/frontend/pcsxr-threads.c
index 1c1ff2e6..78472526 100644
--- a/frontend/pcsxr-threads.c
+++ b/frontend/pcsxr-threads.c
@@ -6,6 +6,7 @@
 #include <3ds/os.h>
 #include <3ds/services/apt.h>
 #include <sys/time.h>
+#include "../libpcsxcore/new_dynarec/new_dynarec.h"
 #endif
 
 #include "../deps/libretro-common/rthreads/rthreads.c"
@@ -45,6 +46,7 @@ sthread_t *pcsxr_sthread_create(void (*thread_func)(void *),
 {
 	sthread_t *h = NULL;
 #ifdef _3DS
+	size_t stack_size = 64*1024;
 	Thread ctr_thread;
 	int core_id = 0;
 	s32 prio = 0x30;
@@ -61,6 +63,8 @@ sthread_t *pcsxr_sthread_create(void (*thread_func)(void *),
 		core_id = 1;
 		break;
 	case PCSXRT_DRC:
+		stack_size = new_dynarec_estimate_stack_size();
+		// fallthrough
 	case PCSXRT_GPU:
 		core_id = is_new_3ds ? 2 : 1;
 		break;
@@ -68,18 +72,19 @@ sthread_t *pcsxr_sthread_create(void (*thread_func)(void *),
 		break;
 	}
 
-	ctr_thread = threadCreate(thread_func, NULL, STACKSIZE, prio, core_id, false);
+	ctr_thread = threadCreate(thread_func, NULL, stack_size, prio, core_id, false);
 	if (!ctr_thread) {
 		if (core_id == 1) {
 			SysPrintf("threadCreate pcsxt %d core %d failed\n",
 				type, core_id);
 			core_id = is_new_3ds ? 2 : -1;
-			ctr_thread = threadCreate(thread_func, NULL, STACKSIZE,
+			ctr_thread = threadCreate(thread_func, NULL, stack_size,
 				prio, core_id, false);
 		}
 	}
+	SysPrintf("threadCreate: pcsxt %d core %d stack %zd: %p\n",
+		type, core_id, stack_size, ctr_thread);
 	if (!ctr_thread) {
-		SysPrintf("threadCreate pcsxt %d core %d failed\n", type, core_id);
 		free(h);
 		return NULL;
 	}
diff --git a/libpcsxcore/new_dynarec/new_dynarec.c b/libpcsxcore/new_dynarec/new_dynarec.c
index 004d0363..ecef746f 100644
--- a/libpcsxcore/new_dynarec/new_dynarec.c
+++ b/libpcsxcore/new_dynarec/new_dynarec.c
@@ -6715,6 +6715,12 @@ void new_dynarec_print_stats(void)
 #endif
 }
 
+int new_dynarec_estimate_stack_size(void)
+{
+  // see: pass6_clean_registers
+  return (sizeof(struct compile_state) + (4+4) * MAXBLOCK + 20 * 1024) & ~4095;
+}
+
 static void force_intcall(int i)
 {
   memset(&dops[i], 0, sizeof(dops[i]));
diff --git a/libpcsxcore/new_dynarec/new_dynarec.h b/libpcsxcore/new_dynarec/new_dynarec.h
index 0d3a6868..c5978218 100644
--- a/libpcsxcore/new_dynarec/new_dynarec.h
+++ b/libpcsxcore/new_dynarec/new_dynarec.h
@@ -36,6 +36,7 @@ void new_dynarec_clear_full(void);
 int  new_dynarec_save_blocks(void *save, int size);
 void new_dynarec_load_blocks(const void *save, int size);
 void new_dynarec_print_stats(void);
+int  new_dynarec_estimate_stack_size(void);
 
 int  new_dynarec_quick_check_range(unsigned int start, unsigned int end);
 void new_dynarec_invalidate_range(unsigned int start, unsigned int end);