+/////////////////////////////////////////////////////////////////////////////
+// Name: msw/stackwalk.cpp
+// Purpose: wxStackWalker implementation for Unix/glibc
+// Author: Vadim Zeitlin
+// Modified by:
+// Created: 2005-01-18
+// RCS-ID: $Id$
+// Copyright: (c) 2005 Vadim Zeitlin <vadim@wxwindows.org>
+// Licence: wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+ #pragma hdrstop
+#endif
+
+#if wxUSE_STACKWALKER
+
+#ifndef WX_PRECOMP
+ #include "wx/string.h"
+#endif
+
+#include "wx/stackwalk.h"
+
+#include <execinfo.h>
+
+#ifdef HAVE_CXA_DEMANGLE
+ #include <cxxabi.h>
+#endif // HAVE_CXA_DEMANGLE
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+wxString wxStackWalker::ms_exepath;
+
+// ----------------------------------------------------------------------------
+// wxStackFrame
+// ----------------------------------------------------------------------------
+
+void wxStackFrame::OnGetName()
+{
+ if ( m_hasName )
+ return;
+
+ m_hasName = true;
+
+ // try addr2line first because it always gives us demangled names (even if
+ // __cxa_demangle is not available) and because it seems less error-prone
+ // when it works, backtrace_symbols() sometimes returns incorrect results
+ OnGetLocation();
+
+ // format is: "module(funcname+offset) [address]" but the part in
+ // parentheses can be not present
+ wxString syminfo = wxString::FromAscii(m_syminfo);
+ const size_t posOpen = syminfo.find(_T('('));
+ if ( posOpen != wxString::npos )
+ {
+ const size_t posPlus = syminfo.find(_T('+'), posOpen + 1);
+ if ( posPlus != wxString::npos )
+ {
+ const size_t posClose = syminfo.find(_T(')'), posPlus + 1);
+ if ( posClose != wxString::npos )
+ {
+ if ( m_name.empty() )
+ {
+ m_name.assign(syminfo, posOpen + 1, posPlus - posOpen - 1);
+
+#ifdef HAVE_CXA_DEMANGLE
+ int rc = -1;
+ char *cppfunc = __cxxabiv1::__cxa_demangle
+ (
+ m_name.mb_str(),
+ NULL, // output buffer (none, alloc it)
+ NULL, // [out] len of output buffer
+ &rc
+ );
+ if ( rc == 0 )
+ m_name = wxString::FromAscii(cppfunc);
+
+ free(cppfunc);
+#endif // HAVE_CXA_DEMANGLE
+ }
+
+ unsigned long ofs;
+ if ( wxString(syminfo, posPlus + 1, posClose - posPlus - 1).
+ ToULong(&ofs, 0) )
+ m_offset = ofs;
+ }
+ }
+ }
+
+ m_module.assign(syminfo, posOpen);
+}
+
+void wxStackFrame::OnGetLocation()
+{
+ if ( m_hasLocation )
+ return;
+
+ m_hasLocation = true;
+
+ // we need to launch addr2line tool to get this information and we need to
+ // have the program name for this
+ wxString exepath = wxStackWalker::GetExePath();
+ if ( exepath.empty() )
+ {
+ if ( !wxTheApp || !wxTheApp->argv )
+ return;
+ exepath = wxTheApp->argv[0];
+ }
+
+ wxArrayString output;
+ wxLogNull noLog;
+ if ( wxExecute(wxString::Format(_T("addr2line -C -f -e \"%s\" %p"),
+ exepath.c_str(),
+ m_address), output) == 0 )
+ {
+ if ( output.GetCount() != 2 )
+ {
+ wxLogDebug(_T("Unexpected addr2line output."));
+ }
+ else // 1st line has function name, 2nd one -- the file/line info
+ {
+ if ( GetName().empty() )
+ {
+ m_name = output[0];
+ if ( m_name == _T("??") )
+ m_name.clear();
+ }
+
+ const size_t posColon = output[1].find(_T(':'));
+ if ( posColon != wxString::npos )
+ {
+ m_filename.assign(output[1], 0, posColon);
+ if ( m_filename == _T("??") )
+ {
+ m_filename.clear();
+ }
+ else
+ {
+ unsigned long line;
+ if ( wxString(output[1], posColon + 1, wxString::npos).
+ ToULong(&line) )
+ m_line = line;
+ }
+ }
+ else
+ {
+ wxLogDebug(_T("Unexpected addr2line format: \"%s\""),
+ output[1].c_str());
+ }
+ }
+ }
+}
+
+// ----------------------------------------------------------------------------
+// wxStackWalker
+// ----------------------------------------------------------------------------
+
+void wxStackWalker::Walk(size_t skip)
+{
+ // that many frames should be enough for everyone
+ void *addresses[200];
+
+ int depth = backtrace(addresses, WXSIZEOF(addresses));
+ if ( !depth )
+ return;
+
+ char **symbols = backtrace_symbols(addresses, depth);
+
+ for ( int n = 0; n < depth; n++ )
+ {
+ wxStackFrame frame(n, addresses[n], symbols[n]);
+ OnStackFrame(frame);
+ }
+}
+
+#endif // wxUSE_STACKWALKER
projects / wxWidgets.git / commitdiff
