1 files changed, 55 insertions, 0 deletions

diff --git a/recipes-devtools/clang/clang/0027-libunwind-Added-unw_backtrace-method.patch b/recipes-devtools/clang/clang/0027-libunwind-Added-unw_backtrace-method.patch
new file mode 100644
index 0000000..3ad6b4f
--- /dev/null
+++ b/recipes-devtools/clang/clang/0027-libunwind-Added-unw_backtrace-method.patch
@@ -0,0 +1,55 @@
+From 0177c3239a1b44e123ab656b46d62fe0ce740936 Mon Sep 17 00:00:00 2001
+From: Maksim Kita <maksim-kita@yandex-team.ru>
+Date: Sun, 23 May 2021 10:27:29 +0000
+Subject: [PATCH] libunwind: Added unw_backtrace method
+
+Source: https://github.com/ClickHouse-Extras/libunwind/commit/52f0f7861926cbfaef7e6c97d8a6d7ba2a1f6747#diff-a82fc885e2e4facf4b92d26171c13aa4aa5db296f77e1158ba2f8664e3bd1f5c
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ libunwind/include/libunwind.h |  1 +
+ libunwind/src/libunwind.cpp   | 18 ++++++++++++++++++
+ 2 files changed, 19 insertions(+)
+
+diff --git a/libunwind/include/libunwind.h b/libunwind/include/libunwind.h
+index 9a74faa48d6f..f7480c9cf27a 100644
+--- a/libunwind/include/libunwind.h
++++ b/libunwind/include/libunwind.h
+@@ -127,6 +127,7 @@ extern int unw_is_fpreg(unw_cursor_t *, unw_regnum_t) LIBUNWIND_AVAIL;
+ extern int unw_is_signal_frame(unw_cursor_t *) LIBUNWIND_AVAIL;
+ extern int unw_get_proc_name(unw_cursor_t *, char *, size_t, unw_word_t *) LIBUNWIND_AVAIL;
+ //extern int       unw_get_save_loc(unw_cursor_t*, int, unw_save_loc_t*);
++extern int unw_backtrace(void **, int) LIBUNWIND_AVAIL;
+ 
+ extern unw_addr_space_t unw_local_addr_space;
+ 
+diff --git a/libunwind/src/libunwind.cpp b/libunwind/src/libunwind.cpp
+index 03f8b75b5bba..730e2393a8f8 100644
+--- a/libunwind/src/libunwind.cpp
++++ b/libunwind/src/libunwind.cpp
+@@ -326,7 +326,25 @@ void __unw_remove_dynamic_eh_frame_section(unw_word_t eh_frame_start) {
+ #endif // defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND)
+ #endif // !defined(__USING_SJLJ_EXCEPTIONS__)
+ 
++int unw_backtrace(void **buffer, int size) {
++  unw_context_t context;
++  unw_cursor_t cursor;
++  if (unw_getcontext(&context) || unw_init_local(&cursor, &context)) {
++    return 0;
++  }
++
++  unw_word_t ip;
++  int current = 0;
++  while (unw_step(&cursor) > 0) {
++    if (current >= size || unw_get_reg(&cursor, UNW_REG_IP, &ip)) {
++      break;
++    }
+ 
++    buffer[current++] = reinterpret_cast<void *>(static_cast<uintptr_t>(ip));
++  }
++
++  return current;
++}
+ 
+ // Add logging hooks in Debug builds only
+ #ifndef NDEBUG