Get rid of boost dependency for stacktraces

CMakeLists.txt

@@ -265,7 +265,10 @@ set(PROJECT_VERSION ${CPACK_PACKAGE_VERSION})
 message(STATUS "Version: ${PROJECT_VERSION}")
 
 cmake_host_system_information(RESULT BUILD_HOST QUERY HOSTNAME)
-set(BUILD_USER $ENV{USER})
+
+include(CheckSymbolExists)
+check_symbol_exists(backtrace_symbols_fd "execinfo.h" HAVE_BACKTRACE_SYMBOLS_FD)
+
 configure_file(cmake/nheko.h config/nheko.h)
 
 
@@ -607,6 +610,10 @@ if(WIN32)
 	target_compile_definitions(nheko PRIVATE _WIN32_WINNT=0x0601)
 else()
 	add_executable (nheko ${OS_BUNDLE} ${NHEKO_DEPS})
+
+	if (HAVE_BACKTRACE_SYMBOLS_FD AND NOT CMAKE_BUILD_TYPE STREQUAL "Release")
+		set_target_properties(nheko PROPERTIES ENABLE_EXPORTS ON)
+	endif()
 endif()
 
 if(APPLE)

cmake/nheko.h

@@ -1,6 +1,9 @@
 namespace nheko {
 constexpr auto version          = "${PROJECT_VERSION}";
-constexpr auto build_user       = "${BUILD_USER}@${BUILD_HOST}";
 constexpr auto build_os         = "${CMAKE_HOST_SYSTEM_NAME}";
 constexpr auto enable_debug_log = ${SPDLOG_DEBUG_ON};
 }
+
+// clang-format off
+#define HAVE_BACKTRACE_SYMBOLS_FD ${HAVE_BACKTRACE_SYMBOLS_FD}
+// clang-format on

src/Olm.h

@@ -4,8 +4,6 @@
 
 #pragma once
 
-#include <boost/optional.hpp>
-
 #include <memory>
 #include <mtx/events.hpp>
 #include <mtx/events/encrypted.hpp>

src/main.cpp

@@ -40,15 +40,48 @@
 QQmlDebuggingEnabler enabler;
 #endif
 
-#if defined(Q_OS_LINUX)
-#include <boost/stacktrace.hpp>
+#if HAVE_BACKTRACE_SYMBOLS_FD
 #include <csignal>
+#include <execinfo.h>
+#include <fcntl.h>
+#include <unistd.h>
 
 void
 stacktraceHandler(int signum)
 {
         std::signal(signum, SIG_DFL);
-        boost::stacktrace::safe_dump_to("./nheko-backtrace.dump");
+
+        // boost::stacktrace::safe_dump_to("./nheko-backtrace.dump");
+
+        // see
+        // https://stackoverflow.com/questions/77005/how-to-automatically-generate-a-stacktrace-when-my-program-crashes/77336#77336
+        void *array[50];
+        size_t size;
+
+        // get void*'s for all entries on the stack
+        size = backtrace(array, 50);
+
+        // print out all the frames to stderr
+        fprintf(stderr, "Error: signal %d:\n", signum);
+        backtrace_symbols_fd(array, size, STDERR_FILENO);
+
+        int file = ::open("/tmp/nheko-crash.dump",
+                          O_CREAT | O_WRONLY | O_TRUNC
+#if defined(S_IWUSR) && defined(S_IRUSR)
+                          ,
+                          S_IWUSR | S_IRUSR
+#elif defined(S_IWRITE) && defined(S_IREAD)
+                          ,
+                          S_IWRITE | S_IREAD
+#endif
+        );
+        if (file != -1) {
+                constexpr char header[] = "Error: signal\n";
+                write(file, header, std::size(header) - 1);
+                backtrace_symbols_fd(array, size, file);
+                close(file);
+        }
+
         std::raise(SIGABRT);
 }