openadk/toolchain/gcc/patches/15.3.0/0004-libsanitizer-uclibc-sock-fprog-sz.patch

libsanitizer: define struct_sock_fprog_sz for SANITIZER_UCLIBC

struct_sock_fprog_sz is declared unconditionally for SANITIZER_LINUX in
sanitizer_platform_limits_posix.h, but its definition in the .cpp is
guarded by #if SANITIZER_GLIBC.  With uClibc-ng (SANITIZER_GLIBC=0,
SANITIZER_UCLIBC=1) the symbol is left undefined and linking any
-fsanitize=address binary fails:

  libasan.so: undefined reference to `__sanitizer::struct_sock_fprog_sz'

Fix:
  1. Include <linux/filter.h> in the non-glibc Linux branch so that
     struct sock_fprog is available regardless of SANITIZER_GLIBC.
  2. Provide the definition of struct_sock_fprog_sz guarded by
     SANITIZER_UCLIBC to match the unconditional header declaration.

Signed-off-by: Ramin Moussavi <ramin.moussavi@yacoub.de>
---
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp
@@ -129,6 +129,7 @@
 #      endif
 #      include <scsi/scsi.h>
 #else
+#include <linux/filter.h>
 #include <linux/if_ppp.h>
 #include <linux/kd.h>
 #include <linux/ppp_defs.h>
@@ -537,6 +538,10 @@
   unsigned struct_sock_fprog_sz = sizeof(struct sock_fprog);
 #  endif  // SANITIZER_GLIBC

+#if SANITIZER_UCLIBC
+  unsigned struct_sock_fprog_sz = sizeof(struct sock_fprog);
+#endif
+
 #  if !SANITIZER_ANDROID && !SANITIZER_APPLE
   unsigned struct_sioc_sg_req_sz = sizeof(struct sioc_sg_req);
   unsigned struct_sioc_vif_req_sz = sizeof(struct sioc_vif_req);