Re: MISSING INFO: Crash: Dolphin musl can't paste a file.

[Plut0nio <Plut0nio@users.noreply.github.com>]

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New comment by Plut0nio on void-packages repository

https://github.com/void-linux/void-packages/issues/51303#issuecomment-2269292679

Comment:
> you can prove it's a stack overflow with like
> 
> ```
> # crashing frame
> (lldb) f 0
> # note down the 0x address
> (lldb) reg read $sp
> # frame that the thread starts at (__clone)
> (lldb) f 7
> # note it again
> (lldb) reg read $sp
> ```
> 
> then in python
> 
> ```
> 0xsecondone - 0xfirstone
> ```
> 
> gives you a value larger than 128KiB, so the stack has overflowed. the -Wl link args i posted would fix it

`f 7` gave me `error: Frame index (7) out of range.`, so I had to use `f 1` instead. Here's my output:

```
$ lldb dolphin
(lldb) target create "dolphin"
Current executable set to '/usr/bin/dolphin' (x86_64).
(lldb) run
Process 23321 launched: '/usr/bin/dolphin' (x86_64)
Process 23321 stopped
* thread #11, name = 'KIO::WorkerThre', stop reason = signal SIGSEGV: invalid permissions for mapped object (fault address: 0x7fffe05b13a8)
    frame #0: 0x00007fffe0ab4eb9
->  0x7fffe0ab4eb9: orq    $0x0, (%rsp)
    0x7fffe0ab4ebe: cmpq   %r11, %rsp
    0x7fffe0ab4ec1: jne    0x7fffe0ab4eb2
    0x7fffe0ab4ec3: subq   $0x2c8, %rsp              ; imm = 0x2C8 
(lldb) f 0
frame #0: 0x00007fffe0ab4eb9
->  0x7fffe0ab4eb9: orq    $0x0, (%rsp)
    0x7fffe0ab4ebe: cmpq   %r11, %rsp
    0x7fffe0ab4ec1: jne    0x7fffe0ab4eb2
    0x7fffe0ab4ec3: subq   $0x2c8, %rsp              ; imm = 0x2C8 
(lldb) reg read $sp
     rsp = 0x00007fffe05b13a8
(lldb) f 7
error: Frame index (7) out of range.
(lldb) f 1
frame #1: 0x00007fffe05d2520
->  0x7fffe05d2520: movabsb -0x4fffffaaaaa9c8c5, %al
    0x7fffe05d2529: cmpl   (%rdi), %esi
    0x7fffe05d252b: pushq  %rsi
    0x7fffe05d252c: pushq  %rbp
(lldb) f 2
error: Frame index (2) out of range.
(lldb) f 1
frame #1: 0x00007fffe05d2520
->  0x7fffe05d2520: movabsb -0x4fffffaaaaa9c8c5, %al
    0x7fffe05d2529: cmpl   (%rdi), %esi
    0x7fffe05d252b: pushq  %rsi
    0x7fffe05d252c: pushq  %rbp
(lldb) reg read $sp
     rsp = 0x00007fffe05d23f8
```

According to Python, 0x00007fffe05d23f8 - 0x00007fffe05b13a8 = 135248, which is indeed greater than 128 kibibytes (131072 bytes).

I have no idea how to use those `-Wl,-z,stack-size=0x200000` flags, though. Is that for linking/building? All my KDE stuff (except for kio-admin) was downloaded and installed from the Void repos.