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Details

Type: Bug
Resolution: Done
Priority: P2: Important
Fix Version/s: None
Affects Version/s: Qt Creator 4.9.2, Qt Creator 4.10.2
Component/s: Debugger
Labels:
- Reported_by_support_standard
Environment:

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Platform: RedHat Enterprise 8.0/8.1
               CentOS 8.0

Qt: Qt 5.11.1, Qt 5.12.5

QtCreator: 1) qt-creator-opensource-linux-x86_64-4.10.2.run form download.qt.io

                  2) qt-creator-opensource-linux-x86_64-4.11.0-beta2.run from download.qt.io

3) self qt-creator 4.10.2 build with qt 5.11.1

4) self qt-creator 4.9.2/4.10.2 build with qt 5.12.5

GCC: 8.2.1 20180905 by system

GDB: GNU gdb (GDB) Red Hat Enterprise Linux 8.2-5.el8 by system

Qt Debuginfo: 1) from access.redhat.com

2) build by self

Minimal Packages:
qt5-qtbase-gui-5.11.1-5.el8.x86_64
qt5-qtbase-5.11.1-5.el8.x86_64
qt5-qtbase-debuginfo-5.11.1-5.el8.x86_64
qt5-rpm-macros-5.11.1-2.el8.noarch
qt5-qtbase-common-5.11.1-5.el8.noarch
qt5-qtbase-devel-5.11.1-5.el8.x86_64

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Platform: RedHat Enterprise 8.0/8.1                CentOS 8.0 Qt: Qt 5.11.1, Qt 5.12.5 QtCreator: 1) qt-creator-opensource-linux-x86_64-4.10.2.run form download.qt.io                   2) qt-creator-opensource-linux-x86_64-4.11.0-beta2.run from download.qt.io 3) self qt-creator 4.10.2 build with qt 5.11.1 4) self qt-creator 4.9.2/4.10.2 build with qt 5.12.5 GCC: 8.2.1 20180905 by system GDB: GNU gdb (GDB) Red Hat Enterprise Linux 8.2-5.el8 by system Qt Debuginfo: 1) from access.redhat.com 2) build by self Minimal Packages: qt5-qtbase-gui-5.11.1-5.el8.x86_64 qt5-qtbase-5.11.1-5.el8.x86_64 qt5-qtbase-debuginfo-5.11.1-5.el8.x86_64 qt5-rpm-macros-5.11.1-2.el8.noarch qt5-qtbase-common-5.11.1-5.el8.noarch qt5-qtbase-devel-5.11.1-5.el8.x86_64

Platform/s:

Linux/X11
Commits:
c8241c12d0094b18d963d7f635f10d469ca0cbcb

Description

When debugging in RHEL8 with qt debuginfo packages installed, Local&Expressions Windows was too slow.

I opened debugger log and log time stramps, and found:

"python theDumper.fetchVariables" would take about 2 seconds and each

QtClass would take 700ms like attachments.

When I remove qt debuginfo packages from system, everything is back to normal.

When I used Qt 5.9.8 in RHEL 7 with debuginfo, everything was perfect. Each QtClass only cost

less then 10ms, and full debugging step cost less then 100ms.

 &"python theDumper.fetchVariables({\"autoderef\":1,\"context\":\"\",\"displaystringlimit\":\"100\",\"dyntype\":1,\"expanded\":[\"inspect\",\"watch\",\"local\",\"return\"],\"fancy\":1,\"formats\":{},\"nativemixed\":0,\"partialvar\":\"\",\"passexceptions\":0,\"qobjectnames\":1,\"resultvarname\":\"\",\"stringcutoff\":\"10000\",\"timestamps\":1,\"token\":257,\"typeformats\":{},\"watchers\":[]})\n"

>~"result={token=\"0\",data=[{iname=\"local.this\",name=\"this\",origaddr=\"0x7fffffffe5b8\",address=\"0x78ffd0\",address=\"0x78ffd0\",numchild=\"1\",time=\"0.00016307830810546875\",type=\"Ui_MainWindow\",value=\"\",},{iname=\"local.MainWindow\",name=\"MainWindow\",origaddr=\"0x7fffffffe5b0\",address=\"0x7fffffffe680\",address=\"0x7fffffffe680\",numchild=\"1\",time=\"0.6441819667816162\",type=\"QMainWindow\",value=\"\",},],typeinfo=[],partial=\"0\",counts={},timings=[]}\n"
t06:03:26.067 [1689ms]
>257^done
t06:03:26.067
tResponse time: python theDumper.fetchVariables({"autoderef":1,"context":"","displaystringlimit":"100","dyntype":1,"expanded":["inspect","watch","local","return"],"fancy":1,"formats":{},"nativemixed":0,"partialvar":"","passexceptions":0,"qobjectnames":1,"resultvarname":"","stringcutoff":"10000","timestamps":1,"token":257,"typeformats":{},"watchers":[]}): 1.695 s
t06:03:26.067
 <Rebuild Watchmodel 46 @ 06:03:26.067 >