git: 11e18f525a83 - main - lang/gcc13: Fix Address sanitizer

The branch main has been updated by salvadore:

URL: https://cgit.FreeBSD.org/ports/commit/?id=11e18f525a8390fda31c44838bde003e23176b95

commit 11e18f525a8390fda31c44838bde003e23176b95
Author:     Lorenzo Salvadore <salvadore@FreeBSD.org>
AuthorDate: 2024-01-12 14:34:58 +0000
Commit:     Lorenzo Salvadore <salvadore@FreeBSD.org>
CommitDate: 2024-01-13 08:18:34 +0000

    lang/gcc13: Fix Address sanitizer
    
    Software compiled with -fsanitize=address fails to run with the error
    message "ASan runtime does not come first in initial library list; you
    should either link runtime to your application or manually preload it
    with LD_PRELOAD".
    
    This commit fixes the issue by ignoring the [vdso] loaded shared library
    instead of linux-vdso.so.
    
    To successfully run the software compiled with -fsanitize=address it is
    still necessary to disable ASLR.
    
    PR:             267751
    Reported by:    yuri
    
    Co-authored-by: Andreas Tobler <andreast@gcc.gnu.org>
---
 lang/gcc13/Makefile                                |  2 +-
 .../files/patch-libsanitizer_asan_asan__linux.cpp  | 23 ++++++++++++++++++++++
 .../files/patch-libsanitizer_asan_asan__thread.cpp | 13 ++++++++++++
 3 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/lang/gcc13/Makefile b/lang/gcc13/Makefile
index fb314ff3629e..11b37e3c46b8 100644
--- a/lang/gcc13/Makefile
+++ b/lang/gcc13/Makefile
@@ -1,6 +1,6 @@
 PORTNAME=	gcc
 PORTVERSION=	13.2.0
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	lang
 MASTER_SITES=	GCC
 PKGNAMESUFFIX=	${SUFFIX}
diff --git a/lang/gcc13/files/patch-libsanitizer_asan_asan__linux.cpp b/lang/gcc13/files/patch-libsanitizer_asan_asan__linux.cpp
new file mode 100644
index 000000000000..f6c16d8730ee
--- /dev/null
+++ b/lang/gcc13/files/patch-libsanitizer_asan_asan__linux.cpp
@@ -0,0 +1,23 @@
+Since the vDSO shared librares on Linux and FreeBSD are called
+differently, the initialization order check fails on FreeBSD.
+This patch fixes it by ignoring [vdso] instead of linux-vdso.so.
+
+GCC gets the original file from the LLVM Project, so this patch should
+probably be upstreamed directly to the LLVM Project rather than to GCC.
+
+
+--- libsanitizer/asan/asan_linux.cpp.orig	2022-11-23 11:22:41 UTC
++++ libsanitizer/asan/asan_linux.cpp
+@@ -148,6 +148,12 @@ static int FindFirstDSOCallback(struct dl_phdr_info *i
+     return 0;
+ #    endif
+ 
++#    if SANITIZER_FREEBSD
++  // Ignore vDSO
++  if (internal_strncmp(info->dlpi_name, "[vdso]", sizeof("[vdso]") - 1) == 0)
++    return 0;
++#    endif
++
+   *name = info->dlpi_name;
+   return 1;
+ }
diff --git a/lang/gcc13/files/patch-libsanitizer_asan_asan__thread.cpp b/lang/gcc13/files/patch-libsanitizer_asan_asan__thread.cpp
new file mode 100644
index 000000000000..61c0ccf1cd89
--- /dev/null
+++ b/lang/gcc13/files/patch-libsanitizer_asan_asan__thread.cpp
@@ -0,0 +1,13 @@
+--- libsanitizer/asan/asan_thread.cpp.orig	2024-01-12 13:45:52 UTC
++++ libsanitizer/asan/asan_thread.cpp
+@@ -323,7 +323,9 @@ void AsanThread::ClearShadowForThreadStackAndTLS() {
+   if (tls_begin_ != tls_end_) {
+     uptr tls_begin_aligned = RoundDownTo(tls_begin_, ASAN_SHADOW_GRANULARITY);
+     uptr tls_end_aligned = RoundUpTo(tls_end_, ASAN_SHADOW_GRANULARITY);
+-    FastPoisonShadow(tls_begin_aligned, tls_end_aligned - tls_begin_aligned, 0);
++    FastPoisonShadowPartialRightRedzone(tls_begin_aligned,
++				tls_end_ - tls_begin_aligned,
++				tls_end_aligned - tls_end_, 0);
+   }
+ }
+