Attachment 238288 Details for Bug 267751 – gcc13-devel - fix sanitizer

[patch] gcc13-devel - fix sanitizer

0001-lang-gcc13-devel-Fix-Address-sanitizer.patch (text/plain), 1.90 KB, created by Lorenzo Salvadore on 2022-11-23 23:42:06 UTC

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Creator: Lorenzo Salvadore

Created: 2022-11-23 23:42:06 UTC

Size: 1.90 KB

patch

obsolete

>From e4d084597431256aa4e86bdb1e4ea2889fc8a422 Mon Sep 17 00:00:00 2001
>From: Lorenzo Salvadore <salvadore@FreeBSD.org>
>Date: Wed, 23 Nov 2022 12:51:44 +0100
>Subject: [PATCH] lang/gcc13-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   | 23 +++++++++++++++++++
> 1 file changed, 23 insertions(+)
> create mode 100644 lang/gcc13-devel/files/patch-libsanitizer_asan_asan__linux.cpp
>
>diff --git a/lang/gcc13-devel/files/patch-libsanitizer_asan_asan__linux.cpp b/lang/gcc13-devel/files/patch-libsanitizer_asan_asan__linux.cpp
>new file mode 100644
>index 000000000000..f6c16d8730ee
>--- /dev/null
>+++ b/lang/gcc13-devel/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;
>+ }
>-- 
>2.38.0
>

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Attachments on bug 267751: 238286 | 238287 | 238288 | 247061