implemented wxStackWalker for Unix (using glibc-specific methods); moved wxUSE_STACKWALKER to common setu_inc.h

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31474 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2005-01-19 01:15:12 +00:00
parent e926f2efc7
commit eaff0f0d3f
13 changed files with 753 additions and 27 deletions
--- a/src/unix/stackwalk.cpp
+++ b/src/unix/stackwalk.cpp
@@ -0,0 +1,188 @@
+/////////////////////////////////////////////////////////////////////////////
+// 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