added separate program to test signal handler [skip ci]

cli/signalhandler.cpp

@@ -138,9 +138,9 @@ static void CppcheckSignalHandler(int signo, siginfo_t * info, void * context)
         fputs(signame, output);
         fputs(
 #ifdef NDEBUG
-            " - out of memory?\n",
+            " - abort\n",
 #else
-            " - out of memory or assertion?\n",
+            " - abort or assertion\n",
 #endif
             output);
 #ifdef USE_UNIX_BACKTRACE_SUPPORT

test/CMakeLists.txt

@@ -1,4 +1,6 @@
 if (BUILD_TESTS)
+    add_subdirectory(signal)
+
     file(GLOB hdrs "*.h")
     file(GLOB srcs "*.cpp")
     list(APPEND testrunner_SOURCES ${hdrs} ${srcs} $<TARGET_OBJECTS:cli_objs>)

test/signal/CMakeLists.txt

@@ -0,0 +1,7 @@
+add_executable(test-signalhandler
+        test-signalhandler.cpp
+        ${PROJECT_SOURCE_DIR}/cli/signalhandler.cpp
+        ${PROJECT_SOURCE_DIR}/cli/stacktrace.cpp)
+target_include_directories(test-signalhandler PRIVATE ${PROJECT_SOURCE_DIR}/cli ${PROJECT_SOURCE_DIR}/lib)
+# required for backtrace() to produce function names
+target_compile_options(test-signalhandler PRIVATE -rdynamic)

test/signal/test-signalhandler.cpp

@@ -0,0 +1,55 @@
+/*
+ * Cppcheck - A tool for static C/C++ code analysis
+ * Copyright (C) 2007-2023 Cppcheck team.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "signalhandler.h"
+
+#include <cassert>
+#include <cstring>
+
+static void my_assert()
+{
+    assert(false);
+}
+
+static void my_abort()
+{
+    abort();
+}
+
+static void my_segv()
+{
+    // cppcheck-suppress nullPointer
+    ++*(int*)0;
+}
+
+int main(int argc, const char * const argv[])
+{
+    if (argc != 2)
+        return 1;
+
+    register_signal_handler();
+
+    if (strcmp(argv[1], "assert") == 0)
+        my_assert();
+    if (strcmp(argv[1], "abort") == 0)
+        my_abort();
+    if (strcmp(argv[1], "segv") == 0)
+        my_segv();
+
+    return 0;
+}