From 4baab43e17aec3f2fe688b64c05f819206e3c91a Mon Sep 17 00:00:00 2001
From: nils <48135649+Nilstrieb@users.noreply.github.com>
Date: Tue, 13 Jun 2023 14:35:18 +0200
Subject: [PATCH] delete a.cpp

---
 a.cpp | 61 -----------------------------------------------------------
 1 file changed, 61 deletions(-)
 delete mode 100644 a.cpp

diff --git a/a.cpp b/a.cpp
deleted file mode 100644
index 1d1b89d..0000000
--- a/a.cpp
+++ /dev/null
@@ -1,61 +0,0 @@
-
-bool findUnwindSections(int_t targetAddr, UnwindInfoSections &info)
-{
-    // Use DLFO_STRUCT_HAS_EH_DBASE to determine the existence of
-    // `_dl_find_object`. Use _LIBUNWIND_SUPPORT_DWARF_INDEX, because libunwind
-    // support for _dl_find_object on other unwind formats is not implemented,
-    // yet.
-#if defined(DLFO_STRUCT_HAS_EH_DBASE) & defined(_LIBUNWIND_SUPPORT_DWARF_INDEX)
-    // We expect `_dl_find_object` to return PT_GNU_EH_FRAME.
-#if DLFO_EH_SEGMENT_TYPE != PT_GNU_EH_FRAME
-#error _dl_find_object retrieves an unexpected section type
-#endif
-    // We look-up `dl_find_object` dynamically at runtime to ensure backwards
-    // compatibility with earlier version of glibc not yet providing it. On older
-    // systems, we gracefully fallback to `dl_iterate_phdr`. Cache the pointer
-    // so we only look it up once. Do manual lock to avoid _cxa_guard_acquire.
-    static decltype(_dl_find_object) *dlFindObject;
-    static bool dlFindObjectChecked = false;
-    if (!dlFindObjectChecked)
-    {
-        dlFindObject = reinterpret_cast<decltype(_dl_find_object) *>(
-            dlsym(RTLD_DEFAULT, "_dl_find_object"));
-        dlFindObjectChecked = true;
-    }
-    // Try to find the unwind info using `dl_find_object`
-    dl_find_object findResult;
-    if (dlFindObject && dlFindObject((void *)targetAddr, &findResult) == 0)
-    {
-        if (findResult.dlfo_eh_frame == nullptr)
-        {
-            // Found an entry for `targetAddr`, but there is no unwind info.
-            return false;
-        }
-        info.dso_base = reinterpret_cast<uintptr_t>(findResult.dlfo_map_start);
-        info.text_segment_length = static_cast<size_t>(
-            (char *)findResult.dlfo_map_end - (char *)findResult.dlfo_map_start);
-
-        // Record the start of PT_GNU_EH_FRAME.
-        info.dwarf_index_section =
-            reinterpret_cast<uintptr_t>(findResult.dlfo_eh_frame);
-        // `_dl_find_object` does not give us the size of PT_GNU_EH_FRAME.
-        // Setting length to `SIZE_MAX` effectively disables all range checks.
-        info.dwarf_index_section_length = SIZE_MAX;
-        EHHeaderParser<LocalAddressSpace>::EHHeaderInfo hdrInfo;
-        if (!EHHeaderParser<LocalAddressSpace>::decodeEHHdr(
-                *this, info.dwarf_index_section, info.dwarf_index_section_length,
-                hdrInfo))
-        {
-            return false;
-        }
-        // Record the start of the FDE and use SIZE_MAX to indicate that we do
-        // not know the end address.
-        info.dwarf_section = hdrInfo.eh_frame_ptr;
-        info.dwarf_section_length = SIZE_MAX;
-        return true;
-    }
-#endif
-    dl_iterate_cb_data cb_data = {this, &info, targetAddr};
-    int found = dl_iterate_phdr(findUnwindSectionsByPhdr, &cb_data);
-    return static_cast<bool>(found);
-}