DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 1B7123858C66
Date: Fri, 24 May 2024 15:38:29 -0700 (PDT)
To: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
cc: cygwin AT cygwin DOT com
Subject: Re: frequent hangs running ldd
In-Reply-To: <199f58b5-be55-a490-b94c-8b1ec7ff10fe@jdrake.com>
Message-ID: <74e13efb-885a-3a90-f530-a6aa14bc5953@jdrake.com>
References: <fd3b2d14-0d16-9e66-f7ea-daadc0c5bfcc AT jdrake DOT com>
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 <0bd2f49b-93f6-7db4-32b6-7f3021db211e AT jdrake DOT com>
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From: Jeremy Drake via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Jeremy Drake <cygwin AT jdrake DOT com>
Errors-To: cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com
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On Fri, 24 May 2024, Jeremy Drake wrote:

> Windbg reports that ldh.exe is already being debugged.  I was able to do a
> "non-invasive" attach to ldh.exe in windbg, but it doesn't seem to be able
> to deal with the split debug symbols (gnulink?).  I don't know if gdb can
> do a non-invasive attach like that (or open a minidump assuming one could
> be made from a non-invasize attach in windbg).

Seems it can, and at least lldb can load a minidump (unfortunately it's
not showing source file/line info like gdb does):
(lldb) bt
* thread #1, stop reason = Exception 0x80000007 encountered at address
0x000000
  * frame #0: 0x0000000180178837 msys-2.0.dll`cygheap_init()
    frame #1: 0x0000000180178b89 msys-2.0.dll`setup_cygheap()
    frame #2: 0x00000001800488bd msys-2.0.dll`dll_crt0_0()
    frame #3: 0x000000018007197c msys-2.0.dll`dll_entry(h=0x0000000180040000, reason=<unavailable>, static_load=<unavailable>)
    frame #4: 0x00007ffece99869f ntdll.dll`RtlActivateActivationContextUnsafeFast + 303
    frame #5: 0x00007ffece9dd03d ntdll.dll`RtlEnumerateEntryHashTable + 957
    frame #6: 0x00007ffece9dcdee ntdll.dll`RtlEnumerateEntryHashTable + 366
    frame #7: 0x00007ffece9dce60 ntdll.dll`RtlEnumerateEntryHashTable + 480
    frame #8: 0x00007ffece9dce60 ntdll.dll`RtlEnumerateEntryHashTable + 480
    frame #9: 0x00007ffece9dce60 ntdll.dll`RtlEnumerateEntryHashTable + 480
    frame #10: 0x00007ffece9dce60 ntdll.dll`RtlEnumerateEntryHashTable + 480
    frame #11: 0x00007ffece99d62d ntdll.dll`RtlCopyUnicodeString + 1293
    frame #12: 0x00007ffece998940 ntdll.dll`RtlImageRvaToSection + 592
    frame #13: 0x00007ffece988cac ntdll.dll`RtlUnicodeToCustomCPN + 1020
    frame #14: 0x00007ffece99a25a ntdll.dll`LdrLoadDll + 250
    frame #15: 0x00007ffecbe961e2 KERNELBASE.dll`LoadLibraryExW + 370
    frame #16: 0x00007ff6df3414ba ldh.exe
    frame #17: 0x00007ff6df3412ee ldh.exe
    frame #18: 0x00007ff6df341406 ldh.exe
    frame #19: 0x00007ffecdc6257d kernel32.dll`BaseThreadInitThunk + 29
    frame #20: 0x00007ffece9caa48 ntdll.dll`RtlUserThreadStart + 40

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