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see content of a vector in debugging

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mgpensar:

--- Quote from: drac on September 21, 2009, 09:29:18 am ---You might find this blog entry interesting. It's about STL Visualisation from one of the KDevelop developers.

--- End quote ---

Thank you for the post drac, very informative. It seems that nice visualization of STL containers is finally taking its first steps to become wide available.

ollydbg:

--- Quote from: ollydbg on June 07, 2009, 10:43:26 am ---Thanks Jens for your hints.

Here is a workaround.

--- Code: ---#include <iostream>
#include <string>
#include <vector>

using namespace std;

typedef vector<string> vstr;

int main()
{
    vstr v;
    v.push_back("bla bla");
    string v0 = v[0];
    cout << "Hello world!" << endl;
    return 0;
}

I can only watch "v0" (see the screen shot)



--- End code ---

--- End quote ---

hello, I found in the latest svn rev 5826, the debugger watch works badly with the test code above. see my screen shot. can someone find the bug? Thanks.

oBFusCATed:
I think, this is known bug... will look at it tonight

Update: yes known bug...

Here is the output of the whatis command:

--- Code: ---> whatis v_str
type = std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >,std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >

--- End code ---

And this line matches the regexp for std::string and so the script for std::string is used instead of the one for the vector.

Here is a patch that fixes the problem (not tested extensively)

--- Code: ---
Index: src/plugins/debuggergdb/gdb_commands.h
===================================================================
--- src/plugins/debuggergdb/gdb_commands.h      (revision 5826)
+++ src/plugins/debuggergdb/gdb_commands.h      (working copy)
@@ -702,6 +702,8 @@
 
             m_watch->GetSymbol(symbol);
             m_watch->GetType(type);
+            type.Trim(true);
+            type.Trim(false);
             m_Cmd = static_cast<GDB_driver*>(m_pDriver)->GetScriptedTypeCommand(type, m_ParseFunc);
             if (m_Cmd.IsEmpty())
             {
@@ -798,7 +800,7 @@
 //            m_pWatch(watch)
             m_watch(watch)
         {
-            m_Cmd << _T("whatis ");
+            m_Cmd << _T("whatis &");
 //            m_Cmd << m_pWatch->keyword;
             wxString symbol;
             m_watch->GetSymbol(symbol);
@@ -813,6 +815,7 @@
             // type = bool
 
             wxString tmp = output.AfterFirst(_T('='));
+            tmp = tmp.substr(0, tmp.length() - 1);
             // actually add this watch with high priority
 //            m_pDriver->QueueCommand(new GdbCmd_Watch(m_pDriver, m_pDTree, m_pWatch, tmp), DebuggerDriver::High);
             wxString old_type;
@@ -850,6 +853,8 @@
             m_Type(w_type),
             m_Address(address)
         {
+            m_Type.Trim(true);
+            m_Type.Trim(false);
             m_Cmd = static_cast<GDB_driver*>(m_pDriver)->GetScriptedTypeCommand(w_type, m_ParseFunc);
             if (m_Cmd.IsEmpty())
             {
Index: src/scripts/gdb_types.script
===================================================================
--- src/scripts/gdb_types.script        (revision 5826)
+++ src/scripts/gdb_types.script        (working copy)
@@ -24,7 +24,7 @@
     // STL String
     driver.RegisterType(
         _T("STL String"),
-        _T("[^[:alnum:]_]*string[^[:alnum:]_]*"),
+        _T("^std::basic_string<.*>$"),
         _T("Evaluate_StlString"),
         _T("Parse_StlString")
     );
@@ -32,7 +32,7 @@
     // STL Vector
     driver.RegisterType(
         _T("STL Vector"),
-        _T("[^[:alnum:]_]*vector<.*"),
+        _T("^std::vector<(.*)>$"),
         _T("Evaluate_StlVector"),
         _T("Parse_StlVector")
     );

--- End code ---

The patch includes a fix for another problem:

--- Code: ---> whatis gdb_type
Attempt to take contents of a non-pointer value.
>>>>>>cb_gdb:
> whatis &gdb_type
type = const wxString &*
>>>>>>cb_gdb:

--- End code ---
That thing is caused by the command "source stl-views-1.0.3.script", and unfortunately, I've not reported it to gdb upstream, will do so someday...
The patch evaluates the type of the address of the watched variable and then strips the * at the end of the result.

Testing is welcome.

p.s. the patch is agains the wxpropgrid_debugger branch, if you have problems applying it, I'll produce one against trunk

ollydbg:
@oBFusCATed
Thanks, but the patch failed appling in the trunk code :(. Would you supply a patch for the trunk?

MortenMacFly:

--- Quote from: ollydbg on October 02, 2009, 06:26:31 am ---Thanks, but the patch failed appling in the trunk code :(. Would you supply a patch for the trunk?

--- End quote ---
I believe it's for the debugging branch.

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