From 7ed10800fe6b0f5e85ae1492d3a440f8668e0103 Mon Sep 17 00:00:00 2001
From: Loris Reiff <liblor@google.com>
Date: Tue, 4 Jun 2024 06:06:09 -0700
Subject: [PATCH] Allow syscalls relevant for dynamic startup when sanitizers
 are used

Static linking with sanitizers is not possible on ELF platforms.

PiperOrigin-RevId: 640128022
Change-Id: I3cfdb0737b12803c9682a0994bf0fce272929652
---
 sandboxed_api/sandbox2/policybuilder.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sandboxed_api/sandbox2/policybuilder.cc b/sandboxed_api/sandbox2/policybuilder.cc
index 058f3b29..8e187819 100644
--- a/sandboxed_api/sandbox2/policybuilder.cc
+++ b/sandboxed_api/sandbox2/policybuilder.cc
@@ -389,6 +389,10 @@ PolicyBuilder& PolicyBuilder::AllowLlvmSanitizers() {
   // https://github.com/llvm/llvm-project/blob/9aa39481d9eb718e872993791547053a3c1f16d5/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp#L150
   // https://sourceware.org/git/?p=glibc.git;a=blob;f=nptl/pthread_getattr_np.c;h=de7edfa0928224eb8375e2fe894d6677570fbb3b;hb=HEAD#l188
   AllowSyscall(__NR_sched_getaffinity);
+  // https://github.com/llvm/llvm-project/blob/3cabbf60393cc8d55fe635e35e89e5973162de33/compiler-rt/lib/interception/interception.h#L352
+#ifdef __ELF__
+  AllowDynamicStartup();
+#endif
   // https://github.com/llvm/llvm-project/blob/02c2b472b510ff55679844c087b66e7837e13dc2/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp#L434
 #ifdef __NR_readlink
   OverridableBlockSyscallWithErrno(__NR_readlink, ENOENT);