runtime: TestGdbBacktrace failures with "No such process." on loong64

[limeidan]

I encountered this error reported by TestGdbBacktrace when I was doing local testing on loong64:

--- FAIL: TestGdbBacktrace (0.95s)
    runtime-gdb_test.go:79: gdb version 15.2
    runtime-gdb_test.go:527: gdb output:
        Loading Go Runtime support.
        Breakpoint 1 at 0x794e4: file /home/golang/tmp/timerd_testing_task/TestGdbBacktrace3304276978/001/main.go, line 17.
        [New LWP 2969970]
        [New LWP 2969971]
        [New LWP 2969975]
        [New LWP 2969976]
        
        Thread 1 "a.exe" hit Breakpoint 1, 0x00000000000794e4 in main.eee (~r0=<optimized out>) at /home/golang/tmp/timerd_testing_task/TestGdbBacktrace3304276978/001/main.go:17
        17	func eee() bool { return true }
        #0  0x00000000000794e4 in main.eee (~r0=<optimized out>) at /home/golang/tmp/timerd_testing_task/TestGdbBacktrace3304276978/001/main.go:17
        #1  0x00000000000794c8 in main.ddd (~r0=<optimized out>) at /home/golang/tmp/timerd_testing_task/TestGdbBacktrace3304276978/001/main.go:14
        #2  0x000000000007947c in main.ccc (~r0=<optimized out>) at /home/golang/tmp/timerd_testing_task/TestGdbBacktrace3304276978/001/main.go:11
        #3  0x000000000007943c in main.bbb (~r0=<optimized out>) at /home/golang/tmp/timerd_testing_task/TestGdbBacktrace3304276978/001/main.go:8
        #4  0x00000000000793fc in main.aaa (~r0=<optimized out>) at /home/golang/tmp/timerd_testing_task/TestGdbBacktrace3304276978/001/main.go:5
        #5  0x000000000007950c in main.main () at /home/golang/tmp/timerd_testing_task/TestGdbBacktrace3304276978/001/main.go:22
        [New LWP 2969977]
        Couldn't get NT_PRSTATUS registers: No such process.
        [LWP 2969975 exited]
        [LWP 2969971 exited]
        [LWP 2969970 exited]
        [LWP 2969948 exited]
    runtime-gdb_test.go:546: gdb exited with error: exit status 1
FAIL
FAIL	runtime	56.052s

[gopherbot]

Change https://go.dev/cl/684195 mentions this issue: runtime: skip GDB "no such process" case

[gabyhelp]

Related Issues

• runtime: TestGdbBacktrace failures #58698 (closed)
• runtime: TestGdbBacktrace failures with "No such process." since 2021-10-15 #50838 (closed)
• runtime: TestGdbBacktrace failures due to GDB "internal-error: wait returned unexpected status 0x0" #43068 (closed)
• runtime: hangs in TestGdbBacktrace on linux #37405 (closed)
• runtime: TestGdbBacktrace failures #65176 (closed)
• runtime: TestGdbPythonCgo failure with "malformed backtrace" on linux-amd64 builder #35743
• runtime: TestGdbBacktrace fails on netbsd/amd64 #15603 (closed)
• runtime: re-enable TestGdbPython and TestGdbBacktrace on linux/ppc64 (BE) if/when it gets cgo support #17366
• runtime: linux/arm64 runtime.Breakpoint times out #14875 (closed)

Related Code Changes

• runtime: skip GDB "no such process" case

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