From 24e64ab38597c25c0c98e8565184143d1ce192de Mon Sep 17 00:00:00 2001
From: Jeremy <51220084+jeremy-rifkin@users.noreply.github.com>
Date: Sun, 19 Nov 2023 23:17:11 -0600
Subject: [PATCH] Check for _dl_find_object support

---
 CMakeLists.txt               |  8 ++++++++
 cmake/has_dl_find_object.cpp |  6 ++++++
 src/binary/safe_dl.hpp       | 12 ++++++++++++
 3 files changed, 26 insertions(+)
 create mode 100644 cmake/has_dl_find_object.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 56996ec..fa58e9d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -78,6 +78,10 @@ if(NOT WIN32 OR MINGW)
   check_support(HAS_CXX_EXCEPTION_TYPE has_cxx_exception_type.cpp "" "" "")
 endif()
 
+if(UNIX AND NOT APPLE)
+  check_support(HAS_DL_FIND_OBJECT has_dl_find_object.cpp "" "" "")
+endif()
+
 # =============================================== Autoconfig unwinding ===============================================
 # Unwind back-ends
 if(
@@ -276,6 +280,10 @@ if(HAS_CXX_EXCEPTION_TYPE)
   target_compile_definitions(${target_name} PUBLIC CPPTRACE_HAS_CXX_EXCEPTION_TYPE)
 endif()
 
+if(HAS_DL_FIND_OBJECT)
+  target_compile_definitions(${target_name} PUBLIC CPPTRACE_HAS_DL_FIND_OBJECT)
+endif()
+
 # Symbols
 if(CPPTRACE_GET_SYMBOLS_WITH_LIBBACKTRACE)
   if(NOT HAS_BACKTRACE)
diff --git a/cmake/has_dl_find_object.cpp b/cmake/has_dl_find_object.cpp
new file mode 100644
index 0000000..a75ca53
--- /dev/null
+++ b/cmake/has_dl_find_object.cpp
@@ -0,0 +1,6 @@
+#include <dlfcn.h>
+
+int main() {
+    dl_find_object result;
+    _dl_find_object(reinterpret_cast<void*>(main), &result);
+}
diff --git a/src/binary/safe_dl.hpp b/src/binary/safe_dl.hpp
index 36cab12..d43e2ce 100644
--- a/src/binary/safe_dl.hpp
+++ b/src/binary/safe_dl.hpp
@@ -12,6 +12,7 @@
 #include <cstring>
 #include <iostream>
 
+#if CPPTRACE_HAS_DL_FIND_OBJECT
 #if IS_LINUX || IS_APPLE
  #include <unistd.h>
  #include <dlfcn.h>
@@ -55,5 +56,16 @@ namespace detail {
     }
 }
 }
+#else
+namespace cpptrace {
+namespace detail {
+    inline void get_minimal_object_frame(frame_ptr address, minimal_object_frame* out) {
+        out->raw_address = 0;
+        out->address_relative_to_object_base_in_memory = 0;
+        out->object_path[0] = 0;
+    }
+}
+}
+#endif
 
 #endif