1 files changed, 72 insertions, 0 deletions
diff --git a/0034-Backport-sanitizer-Fix-asan-against-glibc-2.34-PR100.patch b/0034-Backport-sanitizer-Fix-asan-against-glibc-2.34-PR100.patch
new file mode 100644
index 0000000..10c4485
--- /dev/null
+++ b/0034-Backport-sanitizer-Fix-asan-against-glibc-2.34-PR100.patch
@@ -0,0 +1,72 @@
+From 2969f5190561e26a8ce42d5dcda43ef59e0b6d32 Mon Sep 17 00:00:00 2001
+From: liyancheng <412998149@qq.com>
+Date: Tue, 26 Apr 2022 19:59:09 +0800
+Subject: [PATCH] [Backport] sanitizer: Fix asan against glibc 2.34 [PR100114]
+
+Reference: https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=d9f462fb372fb02da032cefd6b091d7582c425ae
+
+sanitizer: Fix asan against glibc 2.34 [PR100114]
+
+As mentioned in the PR, SIGSTKSZ is no longer a compile time constant in
+glibc 2.34 and later, so
+static const uptr kAltStackSize = SIGSTKSZ * 4;
+needs dynamic initialization, but is used by a function called indirectly
+from .preinit_array and therefore before the variable is constructed.
+This results in using 0 size instead and all asan instrumented programs
+die with:
+==91==ERROR: AddressSanitizer failed to allocate 0x0 (0) bytes of SetAlternateSignalStack (error code: 22)
+
+Here is a cherry-pick from upstream to fix this.
+
+2021-04-17  Jakub Jelinek  <jakub@redhat.com>
+
+PR sanitizer/100114
+* sanitizer_common/sanitizer_posix_libcdep.cpp: Cherry-pick
+llvm-project revisions 82150606fb11d28813ae6da1101f5bda638165fe
+and b93629dd335ffee2fc4b9b619bf86c3f9e6b0023.
+---
+ .../sanitizer_common/sanitizer_posix_libcdep.cpp    | 13 ++++++++-----
+ 1 file changed, 8 insertions(+), 5 deletions(-)
+
+diff --git a/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp b/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp
+index 304b3a01a..ac88fbe07 100644
+--- a/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp
++++ b/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp
+@@ -169,7 +169,11 @@ bool SupportsColoredOutput(fd_t fd) {
+ 
+ #if !SANITIZER_GO
+ // TODO(glider): different tools may require different altstack size.
+-static const uptr kAltStackSize = SIGSTKSZ * 4;  // SIGSTKSZ is not enough.
++static uptr GetAltStackSize() {
++  // SIGSTKSZ is not enough.
++  static const uptr kAltStackSize = SIGSTKSZ * 4;
++  return kAltStackSize;
++}
+ 
+ void SetAlternateSignalStack() {
+   stack_t altstack, oldstack;
+@@ -180,10 +184,9 @@ void SetAlternateSignalStack() {
+   // TODO(glider): the mapped stack should have the MAP_STACK flag in the
+   // future. It is not required by man 2 sigaltstack now (they're using
+   // malloc()).
+-  void* base = MmapOrDie(kAltStackSize, __func__);
+-  altstack.ss_sp = (char*) base;
++  altstack.ss_size = GetAltStackSize();
++  altstack.ss_sp = (char *)MmapOrDie(altstack.ss_size, __func__);
+   altstack.ss_flags = 0;
+-  altstack.ss_size = kAltStackSize;
+   CHECK_EQ(0, sigaltstack(&altstack, nullptr));
+ }
+ 
+@@ -191,7 +194,7 @@ void UnsetAlternateSignalStack() {
+   stack_t altstack, oldstack;
+   altstack.ss_sp = nullptr;
+   altstack.ss_flags = SS_DISABLE;
+-  altstack.ss_size = kAltStackSize;  // Some sane value required on Darwin.
++  altstack.ss_size = GetAltStackSize();  // Some sane value required on Darwin.
+   CHECK_EQ(0, sigaltstack(&altstack, &oldstack));
+   UnmapOrDie(oldstack.ss_sp, oldstack.ss_size);
+ }
+-- 
+2.25.1
+