SIGSEGV workaround in jau::get_backtrace(..) of libunwind [1.3 - 1.6.2]'s unw_step(..) using g++ 10.2.1 aarch64: Disable Optimization

1 files changed, 14 insertions, 0 deletions

diff --git a/src/debug.cpp b/src/debug.cpp
index 65c54a3..acc77a7 100644
--- a/src/debug.cpp
+++ b/src/debug.cpp
@@ -33,6 +33,16 @@
 
 using namespace jau;
 
+/**
+ * On aarch64 using g++ (Debian 10.2.1-6) 10.2.1 20210110
+ * optimization of `jau::get_backtrace(..)` leads to a SIGSEGV
+ * on libunwind version [1.3 - 1.6.2] function `unw_step(..)`
+ */
+#if defined(__GNUC__) && ! defined(__clang__)
+    #pragma GCC push_options
+    #pragma GCC optimize("-O0")
+#endif
+
 std::string jau::get_backtrace(const bool skip_anon_frames, const jau::snsize_t max_frames, const jau::snsize_t skip_frames) noexcept {
     // symbol:
     //  1: _ZN9direct_bt10DBTAdapter14startDiscoveryEbNS_19HCILEOwnAddressTypeEtt + 0x58d @ ip 0x7faa959d6daf, sp 0x7ffe38f301e0
@@ -101,6 +111,10 @@ std::string jau::get_backtrace(const bool skip_anon_frames, const jau::snsize_t
     return out;
 }
 
+#if defined(__GNUC__) && ! defined(__clang__)
+    #pragma GCC pop_options
+#endif
+
 void jau::print_backtrace(const bool skip_anon_frames, const jau::snsize_t max_frames, const jau::snsize_t skip_frames) noexcept {
     fprintf(stderr, "%s", get_backtrace(skip_anon_frames, max_frames, skip_frames).c_str());
     fflush(stderr);