From 6cd79d45df2fda2872a82302dc80628b1b80e69b Mon Sep 17 00:00:00 2001
From: 4g4 <lispainter@163.com>
Date: Wed, 29 Apr 2026 15:27:52 +0800
Subject: [PATCH] bugfix: fix coredump when resizing terminal window

In the signal handler for the signal SIGWINCH tty_term_resize, we call
tty_dpy_invalidate function. In this function, we change the screen_size
and other critical fields.

While the process is executing the function tty_dpy_flush, and another
SIGWINCH occurs, then the screen_size is changed. And tty_dpy_flush will
access invalid memory which leads to coredump.

In the signal hander of SIGWINCH, we only need to set the flag
complete_refresh.
---
 qe.h   | 2 +-
 tty.c  | 6 +-----
 unix.c | 3 ++-
 3 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/qe.h b/qe.h
index 7cbee10..898c063 100644
--- a/qe.h
+++ b/qe.h
@@ -110,7 +110,7 @@ void set_write_handler(int fd, void (*cb)(void *opaque), void *opaque);
 int set_pid_handler(int pid,
                     void (*cb)(void *opaque, int status), void *opaque);
 void url_exit(void);
-void url_redisplay(void);
+void url_redisplay(QEditScreen *s);
 void register_bottom_half(void (*cb)(void *opaque), void *opaque);
 void unregister_bottom_half(void (*cb)(void *opaque), void *opaque);
 
diff --git a/tty.c b/tty.c
index 4b02055..10b37c4 100644
--- a/tty.c
+++ b/tty.c
@@ -658,11 +658,7 @@ static void tty_term_resize(qe__unused__ int sig)
     QEditScreen *s = tty_screen;
 
     if (s) {
-        tty_dpy_invalidate(s);
-
-        //fprintf(stderr, "tty_term_resize: width=%d, height=%d\n", s->width, s->height);
-
-        url_redisplay();
+        url_redisplay(s);
     }
 }
 
diff --git a/unix.c b/unix.c
index 2dabcf9..39fdc77 100644
--- a/unix.c
+++ b/unix.c
@@ -346,9 +346,10 @@ void url_exit(void)
 }
 
 /* asynchronous redisplay signal received */
-void url_redisplay(void)
+void url_redisplay(QEditScreen *s)
 {
     url_display_request = 1;
+    s->qs->complete_refresh = 1;
 }
 
 int get_clock_ms(void) {