tools/ci.sh: Disable "stack use after return" in ASan build.

jepler · dpgeorge · commit 07c3bf21f22e · 2025-07-01T15:18:29.000+10:00
This check, runtime-enabled by default in gcc 13 (and existing at least
since gcc 12, but runtime-disabled) changes the stack layout in ways that
are not compatible with assumptions spread across the core code (nlr, gc,
and stack checking).

Signed-off-by: Jeff Epler &lt;jepler@gmail.com&gt;
diff --git a/tools/ci.sh b/tools/ci.sh
@@ -514,8 +514,8 @@ CI_UNIX_OPTS_QEMU_RISCV64=(
 
 CI_UNIX_OPTS_SANITIZE_ADDRESS=(
     VARIANT=coverage
-    CFLAGS_EXTRA="-fsanitize=address"
-    LDFLAGS_EXTRA="-fsanitize=address"
+    CFLAGS_EXTRA="-fsanitize=address --param asan-use-after-return=0"
+    LDFLAGS_EXTRA="-fsanitize=address --param asan-use-after-return=0"
 )
 
 CI_UNIX_OPTS_SANITIZE_UNDEFINED=(

Original file line number	Diff line number	Diff line change
`@@ -514,8 +514,8 @@ CI_UNIX_OPTS_QEMU_RISCV64=(`
`514`	`514`
`515`	`515`	`CI_UNIX_OPTS_SANITIZE_ADDRESS=(`
`516`	`516`	`VARIANT=coverage`
`517`		`- CFLAGS_EXTRA="-fsanitize=address"`
`518`		`- LDFLAGS_EXTRA="-fsanitize=address"`
	`517`	`+ CFLAGS_EXTRA="-fsanitize=address --param asan-use-after-return=0"`
	`518`	`+ LDFLAGS_EXTRA="-fsanitize=address --param asan-use-after-return=0"`
`519`	`519`	`)`
`520`	`520`
`521`	`521`	`CI_UNIX_OPTS_SANITIZE_UNDEFINED=(`