Attachment 238287 Details for Bug 267751 – gcc12-devel - fix sanitizer

[patch] gcc12-devel - fix sanitizer

0001-lang-gcc12-devel-Fix-Address-sanitizer.patch (text/plain), 1.93 KB, created by Lorenzo Salvadore on 2022-11-23 23:41:33 UTC

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Creator: Lorenzo Salvadore

Created: 2022-11-23 23:41:33 UTC

Size: 1.93 KB

patch

obsolete

>From 95377a2b7aac166c9a3b8f4eafeb75c9aaaa5c36 Mon Sep 17 00:00:00 2001
>From: Lorenzo Salvadore <salvadore@FreeBSD.org>
>Date: Thu, 24 Nov 2022 00:07:58 +0100
>Subject: [PATCH] lang/gcc12-devel: 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
>---
> .../patch-libsanitizer_asan_asan__linux.cpp    | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
> create mode 100644 lang/gcc12-devel/files/patch-libsanitizer_asan_asan__linux.cpp
>
>diff --git a/lang/gcc12-devel/files/patch-libsanitizer_asan_asan__linux.cpp b/lang/gcc12-devel/files/patch-libsanitizer_asan_asan__linux.cpp
>new file mode 100644
>index 000000000000..10cfec69ce6b
>--- /dev/null
>+++ b/lang/gcc12-devel/files/patch-libsanitizer_asan_asan__linux.cpp
>@@ -0,0 +1,18 @@
>+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 23:07:19 UTC
>++++ libsanitizer/asan/asan_linux.cpp
>+@@ -136,7 +136,7 @@ static int FindFirstDSOCallback(struct dl_phdr_info *i
>+     return 0;
>+ 
>+   // Ignore vDSO
>+-  if (internal_strncmp(info->dlpi_name, "linux-", sizeof("linux-") - 1) == 0)
>++  if (internal_strncmp(info->dlpi_name, "[vdso]", sizeof("[vdso]") - 1) == 0)
>+     return 0;
>+ 
>+ #if SANITIZER_FREEBSD || SANITIZER_NETBSD
>-- 
>2.38.0
>

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