gdb in QtCreator on windows quits constantly

JohnGa

Hello,
I am using QtCreator 4.9, with Qt 5.12.3 and mingw tools on Windows 10. I am trying to debug a nasty issue in my code where the selectionModel of a QTableView is not being updated. When I am in the debugger, I see the reference to my QTableView.

I am using the Qt maintenance tool installed Qt libraries, with the QTcreator source pointed to the source installed by the maintenance tool.

Clicking on some of the attributes in the Qt framework objects(QTableView, etc) is like a minefield. Some fields which if I try to expand that just cause gdb to quit with "Unexpected gdb exit" (with the message "the gdb process terminated"). Is there a way to avoid this?

Thanks

aha_1980

Hi @JohnGa,

you could have a look at Windows > Views > Debugger Log and see if that gives any more insights to the problem.

Regards

JohnGa

This is what I see in my debugger log. I am pasting the parts from a little before the shutdown...

>182^done
t07:52:27.352
tResponse time: python theDumper.fetchStack({"limit":20,"nativemixed":0,"token":182}): 0.606 s
t07:52:27.368
<183-stack-select-frame 0
t07:52:27.368
<184python theDumper.fetchVariables({"autoderef":1,"context":"","displaystringlimit":"100","dyntype":1,"expanded":["inspect","return","watch","local"],"fancy":1,"formats":{},"nativemixed":0,"partialvar":"","passexceptions":0,"qobjectnames":1,"resultvarname":"","stringcutoff":"10000","token":184,"typeformats":{},"watchers":[]})
t07:52:27.368
t07:52:27.399 [31ms]
>183^done
t07:52:27.399
tResponse time: -stack-select-frame 0: 0.031 s
t07:52:27.399
t07:52:27.399
>&"python theDumper.fetchVariables({\"autoderef\":1,\"context\":\"\",\"displaystringlimit\":\"100\",\"dyntype\":1,\"expanded\":[\"inspect\",\"return\",\"watch\",\"local\"],\"fancy\":1,\"formats\":{},\"nativemixed\":0,\"partialvar\":\"\",\"passexceptions\":0,\"qobjectnames\":1,\"resultvarname\":\"\",\"stringcutoff\":\"10000\",\"token\":184,\"typeformats\":{},\"watchers\":[]})\n"

>~"result={token=\"0\",data=[{iname=\"local.this\",name=\"this\",origaddr=\"0xb5b0c0\",address=\"0x1ed0aae0\",address=\"0x1ed0aae0\",numchild=\"1\",type=\"AddressWidget\",value=\"\",},{iname=\"local.temp\",name=\"temp\",origaddr=\"0xb5b098\",address=\"0x1ed9ddd0\",address=\"0x1ed9ddd0\",numchild=\"1\",type=\"QTableView\",value=\"\",},{iname=\"local.proxy\",name=\"proxy\",origaddr=\"0xb5b090\",address=\"0x1ed9b160\",address=\"0x1ed9b160\",numchild=\"1\",type=\"QSortFilterProxyModel\",value=\"\",},{iname=\"local.selectionModel\",name=\"selectionModel\",origaddr=\"0xb5b088\",address=\"0x1edacd50\",address=\"0x1edacd50\",numchild=\"1\",type=\"QItemSelectionModel\",value=\"\",},{iname=\"local.indexes\",name=\"indexes\",numchild=\"0\",type=\"QList<QModelIndex>\",valueencoded=\"notaccessible\",value=\"\",},],typeinfo=[],partial=\"0\",counts={},timings=[]}\n"
t07:52:28.211 [812ms]
>184^done
t07:52:28.211
tResponse time: python theDumper.fetchVariables({"autoderef":1,"context":"","displaystringlimit":"100","dyntype":1,"expanded":["inspect","return","watch","local"],"fancy":1,"formats":{},"nativemixed":0,"partialvar":"","passexceptions":0,"qobjectnames":1,"resultvarname":"","stringcutoff":"10000","token":184,"typeformats":{},"watchers":[]}): 0.843 s
t07:52:28.211
 <Rebuild Watchmodel 4 @ 07:52:28.211 >
t07:52:28.211
 Finished retrieving data.
t07:52:28.211

t07:52:34.228
<185python theDumper.fetchVariables({"autoderef":1,"context":"","displaystringlimit":"100","dyntype":1,"expanded":["inspect","return","watch","local.temp","local"],"fancy":1,"formats":{},"nativemixed":0,"partialvar":"local.temp","passexceptions":0,"qobjectnames":1,"resultvarname":"","stringcutoff":"10000","token":185,"typeformats":{},"watchers":[]})
t07:52:34.259 [31ms]
>&"python theDumper.fetchVariables({\"autoderef\":1,\"context\":\"\",\"displaystringlimit\":\"100\",\"dyntype\":1,\"expanded\":[\"inspect\",\"return\",\"watch\",\"local.temp\",\"local\"],\"fancy\":1,\"formats\":{},\"nativemixed\":0,\"partialvar\":\"local.temp\",\"passexceptions\":0,\"qobjectnames\":1,\"resultvarname\":\"\",\"stringcutoff\":\"10000\",\"token\":185,\"typeformats\":{},\"watchers\":[]})\n"
>~"result={token=\"0\",data=[{iname=\"local.temp\",name=\"temp\",origaddr=\"0xb5b098\",address=\"0x1ed9ddd0\",address=\"0x1ed9ddd0\",numchild=\"1\",sortable=\"1\",children=[{iname=\"local.temp.@1\",name=\"[QAbstractItemView]\",sortgroup=\"999\",address=\"0x1ed9ddd0\",address=\"0x1ed9ddd0\",numchild=\"1\",type=\"QAbstractItemView\",value=\"\",},{name=\"staticMetaObject\",numchild=\"1\",address=\"0x680e26c0\",type=\"QMetaObject\",value=\"\",},{name=\"[parent]\",sortgroup=\"9\",address=\"0x1ed0cea0\",numchild=\"1\",type=\"QStackedWidget\",valueencoded=\"utf16\",value=\"710074005f007400610062007700690064006700650074005f0073007400610063006b0065006400770069006400670065007400\",},{name=\"[children]\",sortgroup=\"8\",numchild=\"8\",valueencoded=\"itemcount\",value=\"8\",},{name=\"[extra]\",sortgroup=\"1\",numchild=\"1\",value=\"\",},{name=\"[properties]\",sortgroup=\"5\",numchild=\"1\",valueencoded=\"minimumitemcount\",value=\"5\",},{name=\"[methods]\",sortgroup=\"3\",numchild=\"24\",valueencoded=\"itemcount\",value=\"24\",},{name=\"[d]\",address=\"0x1ed9f590\",numchild=\"1\",sortgroup=\"15\",type=\"QTableViewPrivate\",value=\"\",},],type=\"QTableView\",value=\"\",},],typeinfo=[],partial=\"1\",counts={'metaObjectFromType': 1},timings=[]}\n"
t07:52:34.321 [62ms]
>185^done
t07:52:34.321
tResponse time: python theDumper.fetchVariables({"autoderef":1,"context":"","displaystringlimit":"100","dyntype":1,"expanded":["inspect","return","watch","local.temp","local"],"fancy":1,"formats":{},"nativemixed":0,"partialvar":"local.temp","passexceptions":0,"qobjectnames":1,"resultvarname":"","stringcutoff":"10000","token":185,"typeformats":{},"watchers":[]}): 0.093 s
t07:52:34.321
 <Rebuild Watchmodel 5 @ 07:52:34.321 >
t07:52:34.321
 Finished retrieving data.
t07:52:34.321
dADJUSTING CHILD EXPECTATION FOR local.temp
t07:52:34.321

t07:52:48.368
<186python theDumper.fetchVariables({"autoderef":1,"context":"","displaystringlimit":"100","dyntype":1,"expanded":["inspect","return","watch","local.temp.[properties]","local.temp","local"],"fancy":1,"formats":{},"nativemixed":0,"partialvar":"local.temp.[properties]","passexceptions":0,"qobjectnames":1,"resultvarname":"","stringcutoff":"10000","token":186,"typeformats":{},"watchers":[]})
t07:52:48.400 [32ms]
>&"python theDumper.fetchVariables({\"autoderef\":1,\"context\":\"\",\"displaystringlimit\":\"100\",\"dyntype\":1,\"expanded\":[\"inspect\",\"return\",\"watch\",\"local.temp.[properties]\",\"local.temp\",\"local\"],\"fancy\":1,\"formats\":{},\"nativemixed\":0,\"partialvar\":\"local.temp.[properties]\",\"passexceptions\":0,\"qobjectnames\":1,\"resultvarname\":\"\",\"stringcutoff\":\"10000\",\"token\":186,\"typeformats\":{},\"watchers\":[]})\n"

t07:52:49.915 [1515ms]
dHANDLE GDB ERROR: The process was ended forcefully.
dProcess crashed
t07:52:49.915
dGDB PROCESS FINISHED, status 1, exit code -1073741819
t07:52:49.915
dNOTE: INFERIOR ILL
t07:52:49.915
dState changed from InferiorStopOk(11) to InferiorShutdownRequested(13)
t07:52:49.915
dCALL: SHUTDOWN INFERIOR
t07:52:49.915
dNO GDB PROCESS RUNNING, CMD IGNORED: kill  13
t07:52:49.915
dINFERIOR FINISHED SHUT DOWN
t07:52:49.915
dState changed from InferiorShutdownRequested(13) to InferiorShutdownFinished(14)
t07:52:49.915
dState changed from InferiorShutdownFinished(14) to EngineShutdownRequested(15)
t07:52:49.915
dCALL: SHUTDOWN ENGINE
t07:52:49.915
dPLAIN ADAPTER SHUTDOWN 15
t07:52:49.915
dINITIATE GDBENGINE SHUTDOWN, PROC STATE: 0
t07:52:49.915
dNOTE: ENGINE SHUTDOWN FINISHED
t07:52:49.915
dState changed from EngineShutdownRequested(15) to EngineShutdownFinished(16)
t07:52:49.915

aha_1980

@JohnGa said in gdb in QtCreator on windows quits constantly:

dHANDLE GDB ERROR: The process was ended forcefully.

That one looks strange. I'd suggest you to create a bugreport at https://bugreports.qt.io/projects/QTCREATORBUG

Attach the full log and fill out all needed information. You may be asked for a minimal example to reproduce the bug.

In the worst case it's a GDB thing and Creator cannot do anything - but that has to be proved first.

Regards

JohnGa

I have created a bug report. Since there is nothing else that can be done here, I will just mark this as resolved. Thanks @aha_1980

aha_1980

@JohnGa thanks. for reference, this is the report: https://bugreports.qt.io/browse/QTCREATORBUG-22438

Roberto Viola

I solved in this way http://robertoviola.cloud/2020/04/08/qtcreator-gdb-process-exited-unexpectedly/

robgarnett

Hi,

I had the same problem with the gdb debugger terminating on entry to a function. (Windows 10 64) Qt Creator 41.2 64 Bit build.

I cleared all of the expressions in the expression evaluator and this got rid of the issue.

There is obviously something wrong with the way Qt and the debugger interact when displaying variables. I have often clicked on a "d" child of an object and had the debugger crash.

Best regards

Rob

Imran Hassan

@robgarnett
How you cleared all expressions in the expression evaluator. I am facing same problem and I think I have to clear it. Beacause it is giving this error only debug mode. So I am not finding way to clear the expressions. Can you guide me please

JohnGa

@Imran-Hassan
In the left side toolbar, choose "Debug". Then in the "Window" menu, go to "Views", and choose "Reset to Default Layout". Against the right edge, the "Locals" pane will open. Below the "Locals" pane you will see the "Expressions" pane. You can select and clear out all the expressions there.

Imran Hassan

@JohnGa Thank you. It worked