Attempt to fix #8137 (arrived at r40862).

[lyx.git] / src / support / lassert.cpp

diff --git a/src/support/lassert.cpp b/src/support/lassert.cpp
index 64f92a61ac4b74ffa4e3093dbb0fb71b94b4aed8..9c0daff32876de3f9e8d7e1b7048db458da5b6ca 100644 (file)
--- a/src/support/lassert.cpp
+++ b/src/support/lassert.cpp
@@ -1,9 +1,10 @@
 /**
- * \file assert.cpp
+ * \file lassert.cpp
  * This file is part of LyX, the document processor.
  * Licence details can be found in the file COPYING.
  *
- * \author André Pönitz
+ * \author André Pönitz
+ * \author Peter Kümmel
  *
  * Full author contact details are available in file CREDITS.
  */
@@ -14,13 +15,64 @@
 
 #include <boost/assert.hpp>
 
+
+//#define LYX_CALLSTACK_PRINTING
+// must be linked with -rdynamic
+#ifdef LYX_CALLSTACK_PRINTING
+#include <cstdio>
+#include <cstdlib>
+#include <execinfo.h>
+#include <cxxabi.h>
+#endif
+
+
 namespace lyx {
 
 void doAssert(char const * expr,  char const * file, long line)
 {
+    // TODO Should we try to print the call stack before exiting?
+
        LYXERR0("ASSERTION " << expr << " VIOLATED IN " << file << ":" << line);
        // comment this out if not needed
        BOOST_ASSERT(false);
 }
 
+
+//TODO Return as string, so call stack could be used in dialogs.
+void printCallStack()
+{
+#ifdef LYX_CALLSTACK_PRINTING
+       const int depth = 50;
+       
+       // get void*'s for all entries on the stack
+       void* array[depth];
+       size_t size = backtrace(array, depth);
+       
+       char** messages = backtrace_symbols(array, size);
+       
+       for (size_t i = 0; i < size && messages != NULL; i++) {
+               std::string orig(messages[i]);
+               // extract mangled: bin/lyx2.0(_ZN3lyx7support7packageEv+0x32) [0x8a2e02b]
+               char* mangled = 0;
+               for (char *p = messages[i]; *p; ++p) {
+                       if (*p == '(') {
+                               *p = 0;
+                               mangled = p + 1;
+                       } else if (*p == '+') {
+                               *p = 0;
+                               break;
+                       }
+               }
+               int err = 0;
+               char* demangled = abi::__cxa_demangle(mangled, 0, 0, &err);
+               if (err == 0) {
+                       fprintf(stderr, "[bt]: (%d) %s %s\n", i, messages[i], demangled);
+                       free((void*)demangled);
+               } else {
+                       fprintf(stderr, "[bt]: (%d) %s\n", i, orig.c_str());
+               }               
+       }
+#endif
+}
+
 } // namespace lyx