<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/54520>54520</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            lldb-server process crashes when debugging on pcc64le
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            lldb,
            crash
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          tbaederr
      </td>
    </tr>
</table>

<pre>
    Backtrace:

```
#0  0x00007fffed4d6efc in __pthread_kill_implementation () from /lib64/libc.so.6
#1  0x00007fffed47633c in raise () from /lib64/libc.so.6
#2  0x00007fffed45076c in abort () from /lib64/libc.so.6
#3  0x000000001052b628 in std::__replacement_assert (__file=0x1104bc40 "/usr/include/c++/11/array", __line=188,
    __function=0x1104bac8 "std::array<_Tp, _Nm>::value_type& std::array<_Tp, _Nm>::operator[](std::array<_Tp, _Nm>::size_type) [with _Tp = lldb_private::process_linux::NativeRegisterContextLinux_ppc64le::DREG; long unsigned int"..., __condition=0x1104bab0 "__n < this->size()") at /usr/include/c++/11/ppc64le-redhat-linux/bits/c++config.h:514
#4  0x00000000105dd13c in std::array<lldb_private::process_linux::NativeRegisterContextLinux_ppc64le::DREG, 4ul>::operator[] (this=0x115c7f78, __n=4) at /usr/include/c++/11/array:188
#5  0x00000000100a6f18 in lldb_private::process_linux::NativeRegisterContextLinux_ppc64le::GetWatchpointSize (this=0x115c76f0, wp_index=4)
    at ../source/Plugins/Process/Linux/NativeRegisterContextLinux_ppc64le.cpp:648
#6  0x00000000100a7210 in lldb_private::process_linux::NativeRegisterContextLinux_ppc64le::GetWatchpointHitIndex (this=0x115c76f0, wp_index=@0x7fffffffd060: 4, trap_addr=140737353910136)
    at ../source/Plugins/Process/Linux/NativeRegisterContextLinux_ppc64le.cpp:673
#7  0x0000000010093f00 in lldb_private::process_linux::NativeProcessLinux::MonitorSIGTRAP (this=0x115c70c0, info=..., thread=...) at ../source/Plugins/Process/Linux/NativeProcessLinux.cpp:690
#8  0x0000000010093098 in lldb_private::process_linux::NativeProcessLinux::MonitorCallback (this=0x115c70c0, pid=539214, exited=false, status=...) at ../source/Plugins/Process/Linux/NativeProcessLinux.cpp:488
#9  0x000000001009bbfc in lldb_private::process_linux::NativeProcessLinux::SigchldHandler (this=0x115c70c0) at ../source/Plugins/Process/Linux/NativeProcessLinux.cpp:1976
#10 0x000000001058b2a0 in lldb_private::process_linux::NativeProcessLinux::NativeProcessLinux(int, int, lldb_private::NativeProcessProtocol::NativeDelegate&, lldb_private::ArchSpec const&, lldb_private::MainLoop&, llvm::ArrayRef<int>)::{lambda(lldb_private::MainLoopBase&)#1}::operator()(lldb_private::MainLoopBase&) const () at ../source/Plugins/Process/Linux/NativeProcessLinux.cpp:323
#11 0x00000000105af330 in std::__invoke_impl<void, lldb_private::process_linux::NativeProcessLinux::NativeProcessLinux(pid_t, int, lldb_private::NativeProcessProtocol::NativeDelegate&, const lldb_private::ArchSpec&, lldb_private::MainLoop&, llvm::ArrayRef<int>)::<lambda(lldb_private::MainLoopBase&)>&, lldb_private::MainLoopBase&>(std::__invoke_other, struct {...} &, lldb_private::MainLoopBase &) (__f=...)
    at /usr/include/c++/11/bits/invoke.h:61
#12 0x00000000105a2bec in std::__invoke_r<void, lldb_private::process_linux::NativeProcessLinux::NativeProcessLinux(pid_t, int, lldb_private::NativeProcessProtocol::NativeDelegate&, const lldb_private::ArchSpec&, lldb_private::MainLoop&, llvm::ArrayRef<int>)::<lambda(lldb_private::MainLoopBase&)>&, lldb_private::MainLoopBase&>(struct {...} &, lldb_private::MainLoopBase &) (__fn=...)
    at /usr/include/c++/11/bits/invoke.h:154
#13 0x0000000010598afc in std::_Function_handler<void(lldb_private::MainLoopBase&), lldb_private::process_linux::NativeProcessLinux::NativeProcessLinux(pid_t, int, lldb_private::NativeProcessProtocol::NativeDelegate&, const lldb_private::ArchSpec&, lldb_private::MainLoop&, llvm::ArrayRef<int>)::<lambda(lldb_private::MainLoopBase&)> >::_M_invoke(const std::_Any_data &, lldb_private::MainLoopBase &) (__functor=...,
    __args#0=...) at /usr/include/c++/11/bits/std_function.h:290
#14 0x0000000010522760 in std::function<void (lldb_private::MainLoopBase&)>::operator()(lldb_private::MainLoopBase&) const (this=0x7fffffffd678, __args#0=...) at /usr/include/c++/11/bits/std_function.h:590
#15 0x000000001005aab8 in lldb_private::MainLoop::ProcessSignal (this=0x7fffffffd9e0, signo=17) at ../source/Host/common/MainLoop.cpp:416
#16 0x0000000010059fd8 in lldb_private::MainLoop::RunImpl::ProcessEvents (this=0x7fffffffd808) at ../source/Host/common/MainLoop.cpp:253
#17 0x000000001005a868 in lldb_private::MainLoop::Run (this=0x7fffffffd9e0) at ../source/Host/common/MainLoop.cpp:403
#18 0x00000000104e9fa0 in main_gdbserver (argc=7, argv=0x7fffffffeb58) at ../tools/lldb-server/lldb-gdbserver.cpp:519
#19 0x000000001050092c in main (argc=7, argv=0x7fffffffeb58) at ../tools/lldb-server/lldb-server.cpp:65
```
`NativeRegisterContextLinux_ppc64le::m_hwp_regs` is a `std::array` of size 4, but the `m_max_hwp_supported` variable is initialized to 16. Is this intentional?

I understand that `m_max_hwp_supported` can later be assigned a different value via `ReadHardwareDebugInfo()`, but that has either not happened or yields 16 anyway.



</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJztWdtu2zgQ_Rr7hYhBUTfrwQ-51G2AtCjSAvsoUCJlcUOLAkk5zn79DiX5ptgbp_HuvtQILEsih2fOHHKGTKbYy-yG5k9W05yP_OsRvhvhzXeE-7_ulvgYIbzG8ImLouAsYBEvciQqlKa1LTWnLH0SUqZiWUu-5JWlVqgKjch0RBJUaLWE33MpsijorvnEqEm0te8N7MeR77f2NRWGn2-HDOyEOI5aOzRT2p5vx9_YcR8PhySLyNTZMZY5svzrNNW8lsCd8zalxvDOfpoWQgKhd3jteTjI8gDDYwKjNEbDt6hy2TAOv_IRuWn_5p4HX1Rr-tK2vAVWpaicEW8KgG87WAg-YL2pcsftbgSaT90IW2SdIf82_Vm3tr4tR_6n7tWKyoan9qWG8SN0Tg9Vc02t0qPwZhTegX_ndDLir80oCYKez8KWCNohAI2kZFlaa7GilnfNa61ybozzuVl3j76Bflb8kS-EsVzfqsrytX1w79O6zqNA9l3vHj99Hvk3SKpqgZrKiEXFGcTJAiGTyaTjMlcVEwPOsjYqaQoa9W-RLYW5AvgOeKeRNhAJoi6mb0WuR3SlOSupvercIPNMWLNrDCAKsZiUADr0gq3QgoHQGPM64b_i-fK8ATlBI0-E2mnZ0dJzFuZxEU87Ph2Pwdns9PivnZQ3XoeHXmMaFV47vS7q5Gdu_6A2L2sFgvgBoX3tU1Rg59NznYqK8XXv2G6-gYdORXOjGp07577LZiEqF9fvHTD49dAH_G1ck7yuAVgU7KiIhlTExMP_LhVfhL133p5DxyjAeO0WU_dhGFKCf40C1wgSR51SxrRbpgIc-7Ef-omHPT_6LyiM_S2F8YDCxC_weynsoTzsnn9VlYDZ8OP-88_H6--vucJ5y5WoCgUP-8Wmy4Wb--RXnN9HsnE22WXi6StncfLeqXPS2VsqJeSTp5Pe1sI5B3EmXisCvhaWu0cFlYa7JwZSf2MuzUCwt3gkQwayrKtFPsTAD7HIS8m-0IpJrk8QcCl3vCTeq33wYQqYZoR-XL5HnpNpmxhvUX95bf-gE1ysypXcf3XHJV-45iQ6buFa5-WPmucI8p2xJ5t9paJ6UKreNlgtN_0hWzzyAhKeQwm5CdaS9s0ovpF0mTEKfpw2eENNBy5xzI7iu0Fu65P7WRY6HzZF42Ui75PduuV5h4Gnhe_jQZEpqpV64m1dDZSsFMy_o4R-VBkwsdPLaqMj77RCLqoNKI_epQ3X943hN61d0-nriChbct0teLrJQSXxjVvxYlc4nWEZ9RLrdgzb5fIgbb5dW_UlZgeprS0jbycvMpAXyXh-XF76t7b-T219XEDV5RTkhbvdiecfSiiZ0mIgoXm_H03LLnNulXTmIv1bcBcQHNpu4tKv_ZyGzh3oXaiuq5eUUUt_RWAuykpvC939EwmqF8YdER3UfGcrD-BtzzRa_ZG9YtcLBscwJI4OM-TuOKSVHXrHJL1EYbCtEbdbpGizS74wLeE-LeFhBRxSmp3YA2z11971godat6LyOP6Et4W-O0lx-xovPlr7fFGuuJvnarkE7sl8M8ymXPf2yttoADYp2FlgH5vqvi179pB_WvHKmuPIp_h4nfYGVhLuVWTxkNhpdC7Wf6DzFwjEe6CmB6ACnhTd_mAJfdIFywzXq27LAprLYfzYRRB-rw6w8Cw8IMgqJZ3UnG9XnY3N3dZoDyf0kh2c5HBOwgaM5Bs4lwRxgCAKjx9NR_jcI5BlWj7XqeYwK90aYhCsgxEeHLPBG1UgdwzYHXJkjYU9PXctl-mSrlsbpqlrpd2-F5qvqBY0k9xZFLCJFlRCb4asQl40QfemPVx0mQiUC5OZgqDn-4ft96ipGNewb66gV-kWiZOD5RSkCBLUKOOImv64kyImgFkNA6D2hBetROvcI6ewodXsmWpIaFmzuHeHFd1KF-GdfzBmSQ3iwtW0qFLutq65s600ehFcMgPeIFq9PNOXycG_CtrvMZv5LPETOrbCSj7bix_qkznKNTUlN-i55BViDg3snhZIVajO2zCNGy1npbW1cREhc_hbAKImm8AsaUWx2lyuwOifPHczSBjTcKegMAgJHpczQn0WT5PEi-KQBTkQU9DY87IoSjw_islY0oxLM3PHnIQ4pP2hO1xajO42vBuLGcGEYJ8EGFYWHE1iRnyfxlPMPZiCCRkFmIPm5cQhmii9GOtZCw5cM_BSgiDN7mUfLj7rzlfHtLGl0jObUQ7h1-PWkVnrxd9Av-jt">