[compiler-rt] Revert "[builtins] Disable COMPILER_RT_CRT_USE_EH_FRAME_REGISTRY by d… (PR #84580)

[Daniel Thornburgh via llvm-commits]

https://github.com/mysterymath created https://github.com/llvm/llvm-project/pull/84580

…efault (#83201)"

This reverts commit 062cfada643c1aa48a1bb81894e2920d390fe8cf. See issue #84574.

>From 832a3eb8591f0d3fa0347e59340d5ef7ece6dc7b Mon Sep 17 00:00:00 2001
From: Daniel Thornburgh <dthorn at google.com>
Date: Fri, 8 Mar 2024 14:26:17 -0800
Subject: [PATCH] Revert "[builtins] Disable
 COMPILER_RT_CRT_USE_EH_FRAME_REGISTRY by default (#83201)"

This reverts commit 062cfada643c1aa48a1bb81894e2920d390fe8cf.
See issue #84574.
---
 compiler-rt/lib/builtins/CMakeLists.txt    |  2 +-
 compiler-rt/test/builtins/Unit/ctor_dtor.c | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/compiler-rt/lib/builtins/CMakeLists.txt b/compiler-rt/lib/builtins/CMakeLists.txt
index 3f2c0f0436393d..f9611574a562b4 100644
--- a/compiler-rt/lib/builtins/CMakeLists.txt
+++ b/compiler-rt/lib/builtins/CMakeLists.txt
@@ -917,7 +917,7 @@ cmake_dependent_option(COMPILER_RT_BUILD_CRT "Build crtbegin.o/crtend.o" ON "COM
 if (COMPILER_RT_BUILD_CRT)
   add_compiler_rt_component(crt)
 
-  option(COMPILER_RT_CRT_USE_EH_FRAME_REGISTRY "Use eh_frame in crtbegin.o/crtend.o" OFF)
+  option(COMPILER_RT_CRT_USE_EH_FRAME_REGISTRY "Use eh_frame in crtbegin.o/crtend.o" ON)
 
   include(CheckSectionExists)
   check_section_exists(".init_array" COMPILER_RT_HAS_INITFINI_ARRAY
diff --git a/compiler-rt/test/builtins/Unit/ctor_dtor.c b/compiler-rt/test/builtins/Unit/ctor_dtor.c
index 3d5f895a0a1cd1..47560722a9f750 100644
--- a/compiler-rt/test/builtins/Unit/ctor_dtor.c
+++ b/compiler-rt/test/builtins/Unit/ctor_dtor.c
@@ -9,13 +9,23 @@
 
 // Ensure the various startup functions are called in the proper order.
 
+// CHECK: __register_frame_info()
 /// ctor() is here if ld.so/libc supports DT_INIT/DT_FINI
 // CHECK:      main()
 /// dtor() is here if ld.so/libc supports DT_INIT/DT_FINI
+// CHECK:      __deregister_frame_info()
 
 struct object;
 static int counter;
 
+void __register_frame_info(const void *fi, struct object *obj) {
+  printf("__register_frame_info()\n");
+}
+
+void __deregister_frame_info(const void *fi) {
+  printf("__deregister_frame_info()\n");
+}
+
 void __attribute__((constructor)) ctor() {
   printf("ctor()\n");
   ++counter;