pyrox.dev
1From dfb5e954a04f59b0456cc4c0ddf3acaf22e0ff07 Mon Sep 17 00:00:00 2001
2From: Richard W.M. Jones <rjones@redhat.com>
3Date: Feb 28 2021 20:45:47 +0000
4Subject: Workaround for glibc non-constant SIGSTKSZ
5
6
7https://github.com/ocaml/ocaml/issues/10250
8
9Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
10
11---
12
13diff --git a/runtime/signals_nat.c b/runtime/signals_nat.c
14index 8b64ab4..7f0a975 100644
15--- a/runtime/signals_nat.c
16+++ b/runtime/signals_nat.c
17@@ -181,7 +181,19 @@ DECLARE_SIGNAL_HANDLER(trap_handler)
18 #error "CONTEXT_SP is required if HAS_STACK_OVERFLOW_DETECTION is defined"
19 #endif
20
21+#ifndef __GLIBC__
22 static char sig_alt_stack[SIGSTKSZ];
23+#else
24+/* glibc 2.34 has non-constant SIGSTKSZ */
25+static char *sig_alt_stack;
26+
27+static void allocate_sig_alt_stack(void) __attribute__((constructor));
28+static void
29+allocate_sig_alt_stack(void)
30+{
31+ sig_alt_stack = malloc(SIGSTKSZ);
32+}
33+#endif
34
35 /* Code compiled with ocamlopt never accesses more than
36 EXTRA_STACK bytes below the stack pointer. */
37