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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 19:39:53 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 19:39:53 +0200
commitdee4dcba78baf712cab403d47d9db319ab7f95d6 (patch)
tree418478faf06786701a56268672f73d6b0b4eb239 /results/classifier/108/debug/1030666
parent4d9e26c0333abd39bdbd039dcdb30ed429c475ba (diff)
downloademulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.tar.gz
emulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.zip
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-debug: 0.978
-permissions: 0.959
-performance: 0.953
-socket: 0.945
-semantic: 0.945
-network: 0.942
-other: 0.939
-PID: 0.937
-files: 0.920
-boot: 0.914
-device: 0.904
-graphic: 0.901
-vnc: 0.853
-KVM: 0.824
-
-gdb can't proceed after a breakpoint
-
-Using qemu-1.0.1-windows.zip package from http://lassauge.free.fr/qemu/
-Host: Windows 7 Ultimate 64-bit
-Guest: i386 system running MS-DOS 6.22
-Launch command line:
- qemu-system-i386.exe -L Bios -fda "DOS.vfd" -fdb "Data.vfd" -gdb tcp:127.0.0.1:1234
-Debbugers tried:
- gdb 7.3.50.20111026-cvs running on Cygwin 1.7.16
- gdb 7.4 on MinGW
-
-Short description:
-I use gdb to attach to a running Qemu session, set a breakpoint and resume execution. When the breakpoint is hit, gdb gains control as expected. However, trying to single-step or continue at this point just causes the same breakpoint to be hit immediately again. Deleting the breakpoint allows single-stepping or continue to work.
-
-Steps to reproduce:
-DOS.vfd is a floppy image containing an MS-DOS 6.22 startup disk.
-Data.vfd is a floppy image containing a single program (hello.com).
-The aim is to debug the execution of hello.com with gdb.
-Launch Qemu.
-Launch gdb, an attach to qemu:
- "target remote localhost:1234"
-I know the address at which hello.com will be loaded, so set a breakpoint there and resume execution:
- "break *0xf730"
- "continue"
-In Qemu, start hello.com. The breakpoint is immediately hit, execution stops and gdb gains control.
-Examining the program gives expected results (such as "info reg" or "disassemble").
-At this point, try to proceed either with single-stepping ("si" or "ni") or with "continue", and the same breakpoint is immediately hit again. Subsequent attempts to single-step or continue just keep hitting the same breakpoint.
-The only way to proceed at this point is to delete the breakpoint, after which both single-stepping and continue work.
-
-Note that single-stepping and continue works as expected if it is done after interrupting execution with Ctrl-C.
-
-Triaging old bug tickets ... can you still reproduce this issue with the
-latest version of QEMU (version 2.9)?
-
-Hi,
-
-Thank you for your email, I remember this issue. Unfortunately I don’t have the time to try this right now, but I may be able to get to it in the next couple of weeks.
-
-Regards,
-Legorol
-
-From: Thomas Huth
-Sent: 07 April 2017 14:59
-To: <email address hidden>
-Subject: [Bug 1030666] Re: gdb can't proceed after a breakpoint
-
-Triaging old bug tickets ... can you still reproduce this issue with the
-latest version of QEMU (version 2.9)?
-
-** Changed in: qemu
- Status: New => Incomplete
-
---
-You received this bug notification because you are subscribed to the bug
-report.
-https://bugs.launchpad.net/bugs/1030666
-
-Title:
- gdb can't proceed after a breakpoint
-
-Status in QEMU:
- Incomplete
-
-Bug description:
- Using qemu-1.1.0-windows.zip package from http://lassauge.free.fr/qemu/
- Host: Windows 7 Ultimate 64-bit
- Guest: i386 system running MS-DOS 6.22
- Launch command line:
-   qemu-system-i386.exe -L Bios -fda "DOS.vfd" -fdb "Data.vfd" -gdb tcp:127.0.0.1:1234
- Debbugers tried:
-   gdb 7.3.50.20111026-cvs running on Cygwin 1.7.16
-   gdb 7.4 on MinGW
-
- Short description:
- I use gdb to attach to a running Qemu session, set a breakpoint and resume execution. When the breakpoint is hit, gdb gains control as expected. However, trying to single-step or continue at this point just causes the same breakpoint to be hit immediately again. Deleting the breakpoint allows single-stepping or continue to work.
-
- Steps to reproduce:
- DOS.vfd is a floppy image containing an MS-DOS 6.22 startup disk.
- Data.vfd is a floppy image containing a single program (hello.com).
- The aim is to debug the execution of hello.com with gdb.
- Launch Qemu.
- Launch gdb, an attach to qemu:
-   "target remote localhost:1234"
- I know the address at which hello.com will be loaded, so set a breakpoint there and resume execution:
-   "break *0xf730"
-   "continue"
- In Qemu, start hello.com. The breakpoint is immediately hit, execution stops and gdb gains control.
- Examining the program gives expected results (such as "info reg" or "disassemble").
- At this point, try to proceed either with single-stepping ("si" or "ni") or with "continue", and the same breakpoint is immediately hit again. Subsequent attempts to single-step or continue just keep hitting the same breakpoint.
- The only way to proceed at this point is to delete the breakpoint, after which both single-stepping and continue work.
-
- Note that single-stepping and continue works as expected if it is done
- after interrupting execution with Ctrl-C.
-
-To manage notifications about this bug go to:
-https://bugs.launchpad.net/qemu/+bug/1030666/+subscriptions
-
-
-
-[Expired for QEMU because there has been no activity for 60 days.]
-