util
Tue May 26 17:46:14 CEST 2009 Tobias Rautenkranz <tobias@rautenkranz.ch>
* Workaround segfault on exit & run test on commit
diff -rN -u old-kde.ui/util/CMakeLists.txt new-kde.ui/util/CMakeLists.txt
--- old-kde.ui/util/CMakeLists.txt 1970-01-01 01:00:00.000000000 +0100
+++ new-kde.ui/util/CMakeLists.txt 2014-10-30 07:22:49.000000000 +0100
@@ -0,0 +1,15 @@
+find_package(Qt4)
+set(QT_DONT_USE_QTGUI true)
+include(${QT_USE_FILE})
+
+include(CheckCXXCompilerFlag)
+check_cxx_compiler_flag("-fvisibility=hidden" CXX_VISIBILITY)
+if(CXX_VISIBILITY)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden")
+endif(CXX_VISIBILITY)
+
+add_library(cl-smoke-disable-backtrace SHARED backtrace.cpp)
+target_link_libraries(cl-smoke-disable-backtrace ${QT_LIBRARIES})
+
+#install(TARGETS cl-smoke-disable-backtrace
+# LIBRARY DESTINATION lib)
diff -rN -u old-kde.ui/util/backtrace.cpp new-kde.ui/util/backtrace.cpp
--- old-kde.ui/util/backtrace.cpp 1970-01-01 01:00:00.000000000 +0100
+++ new-kde.ui/util/backtrace.cpp 2014-10-30 07:22:49.000000000 +0100
@@ -0,0 +1,27 @@
+#include <QDebug>
+
+#define BT_EXPORT __attribute__((visibility("default")))
+
+extern "C" {
+/** Overwrites backtrace_symbols in execinfo.h and does nothing.
+ * Work around segfault in:
+ * ~KIconLoader()
+ * kRealBacktrace(int)
+ * backtrace_symbols
+ *
+ * ~KIconLoader() is called at exit when an KApplication has been constructed.
+ * Somehow a negative number is pased as size to backtrace_symbols:
+ * void* trace[256];
+ * backtrace_symbols(trace, -1219315128); // => SIGSEGV
+ * and segfaults in sysdeps/generic/elf/backtracesyms.c:65
+ */
+BT_EXPORT char**
+backtrace_symbols(void* const* buffer, int size)
+{
+ qDebug() << "libcl-smoke-disable-backtrace: backtrace_symbols workaround\n"
+ << "\tbuffer: " << buffer << "size: " << size;
+ return NULL;
+}
+
+// overwriting backtrace(void** buffer, int size) does not work!?
+}