git: eb54f261fce2 - stable/13 - compiler-rt: support ReExec() on FreeBSD
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Date: Thu, 10 Feb 2022 18:18:20 UTC
The branch stable/13 has been updated by emaste: URL: https://cgit.FreeBSD.org/src/commit/?id=eb54f261fce2b55e6859bc1416ee8d964aefa079 commit eb54f261fce2b55e6859bc1416ee8d964aefa079 Author: Ed Maste <emaste@FreeBSD.org> AuthorDate: 2022-01-19 18:08:18 +0000 Commit: Ed Maste <emaste@FreeBSD.org> CommitDate: 2022-02-10 18:17:39 +0000 compiler-rt: support ReExec() on FreeBSD Based on getMainExecutable() in llvm/lib/Support/Unix/Path.inc. This will need a little more work for an upstream change as it must support older FreeBSD releases that lack elf_aux_info() / AT_EXEC_PATH. No objection: dim MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D33934 (cherry picked from commit 96fe7c8ab0f65cf829619abd74ae6c126b21e15f) --- .../lib/sanitizer_common/sanitizer_linux_libcdep.cpp | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/contrib/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp b/contrib/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp index 7ce9e25da342..59f8d5d1fec2 100644 --- a/contrib/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp +++ b/contrib/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp @@ -46,7 +46,9 @@ #if SANITIZER_FREEBSD #include <pthread_np.h> +#include <stdlib.h> #include <osreldate.h> +#include <sys/auxv.h> #include <sys/sysctl.h> #define pthread_getattr_np pthread_attr_get_np // The MAP_NORESERVE define has been removed in FreeBSD 11.x, and even before @@ -865,7 +867,14 @@ u64 MonotonicNanoTime() { void ReExec() { const char *pathname = "/proc/self/exe"; -#if SANITIZER_NETBSD +#if SANITIZER_FREEBSD + char exe_path[PATH_MAX]; + if (elf_aux_info(AT_EXECPATH, exe_path, sizeof(exe_path)) == 0) { + char link_path[PATH_MAX]; + if (realpath(exe_path, link_path)) + pathname = link_path; + } +#elif SANITIZER_NETBSD static const int name[] = { CTL_KERN, KERN_PROC_ARGS,