[Bug 48861] x64dbg fails to set debuggee command line via File -> Change Command Line menu

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48861

--- Comment #3 from Anastasius Focht <focht at gmx.net> ---
Hello folks,

the situation has improved with recent changes. As already mentioned in my
comment #0 it still doesn't work in all cases (compilers and optimization
strategies).

*
https://source.winehq.org/git/wine.git/commitdiff/d01d3b749d7d99c75f29396fd79fab735ced2b2d
("kernelbase: Use command_lineW for GetCommandLineW.")

*
https://source.winehq.org/git/wine.git/commitdiff/8a1933bbe40b67d22d919861deed9a7a68684433
("kernelbase: Remove DECLSPEC_HOTPATCH for GetCommandLine[AW].")

Thanks Myah

===

GCC 10.2 (Fedora 32):

32-bit works (-gdwarf-2 -gstrict-dwarf -fno-omit-frame-pointer -g -O2)

--- snip --
$ gdb mainline-install-x86_64/lib/wine/kernelbase.dll.so -batch -ex
'disassemble GetCommandLineA'

Dump of assembler code for function GetCommandLineA:
   0x7b070ff0 <+0>:    mov    0x7b0f3708,%eax
   0x7b070ff5 <+5>:    ret 

$ gdb mainline-install-x86_64/lib/wine/kernelbase.dll.so -batch -ex
'disassemble GetCommandLineW'

Dump of assembler code for function GetCommandLineW:
   0x7b071000 <+0>:    mov    0x7b0f3704,%eax
   0x7b071005 <+5>:    ret    
--- snip --

64-bit doesn't work (-gdwarf-2 -gstrict-dwarf -g -O2)

It generates standard function prologue with frame pointer.

--- snip ---
$ gdb mainline-install-x86_64/lib64/wine/kernelbase.dll.so -batch -ex
'disassemble GetCommandLineA'

Dump of assembler code for function GetCommandLineA:
   0x000000007b06e520 <+0>:    push   %rbp
   0x000000007b06e521 <+1>:    mov    0x80f68(%rip),%rax        # 0x7b0ef490
<command_lineA>
   0x000000007b06e528 <+8>:    mov    %rsp,%rbp
   0x000000007b06e52b <+11>:    and    $0xfffffffffffffff0,%rsp
   0x000000007b06e52f <+15>:    leaveq 
   0x000000007b06e530 <+16>:    retq  

$ gdb mainline-install-x86_64/lib64/wine/kernelbase.dll.so -batch -ex
'disassemble GetCommandLineW'

Dump of assembler code for function GetCommandLineW:
   0x000000007b06e540 <+0>:    push   %rbp
   0x000000007b06e541 <+1>:    mov    0x80f40(%rip),%rax        # 0x7b0ef488
<command_lineW>
   0x000000007b06e548 <+8>:    mov    %rsp,%rbp
   0x000000007b06e54b <+11>:    and    $0xfffffffffffffff0,%rsp
   0x000000007b06e54f <+15>:    leaveq 
   0x000000007b06e550 <+16>:    retq   
--- snip ---

===

LLVM MinGW 10.x (PE)

32-bit doesn't work (-fno-omit-frame-pointer -gcodeview -g -O2)

It generates standard function prologue with frame pointer, even though there
is no stack usage at all.

--- snip ---
$ gdb mainline-install-x86_64/lib/wine/kernelbase.dll -batch -ex 'disassemble
GetCommandLineW'
Dump of assembler code for function kernelbase!GetCommandLineW:
   0x7b037830 <+0>:    push   %ebp
   0x7b037831 <+1>:    mov    %esp,%ebp
   0x7b037833 <+3>:    mov    0x7b082de0,%eax
   0x7b037838 <+8>:    pop    %ebp
   0x7b037839 <+9>:    ret    

$ gdb mainline-install-x86_64/lib/wine/kernelbase.dll -batch -ex 'disassemble
GetCommandLineA'
Dump of assembler code for function kernelbase!GetCommandLineA:
   0x7b037820 <+0>:    push   %ebp
   0x7b037821 <+1>:    mov    %esp,%ebp
   0x7b037823 <+3>:    mov    0x7b082de4,%eax
   0x7b037828 <+8>:    pop    %ebp
   0x7b037829 <+9>:    ret    
--- snip ---

64-bit works (-gcodeview -g -O2)

--- snip ---
$ gdb mainline-install-x86_64/lib64/wine/kernelbase.dll -batch -ex 'disassemble
GetCommandLineA'

Dump of assembler code for function kernelbase!GetCommandLineA:
   0x000000007b040940 <+0>:    mov    0x550d9(%rip),%rax        # 0x7b095a20
   0x000000007b040947 <+7>:    retq   
   0x000000007b040948 <+8>:    nopl   0x0(%rax,%rax,1)


$ gdb mainline-install-x86_64/lib64/wine/kernelbase.dll -batch -ex 'disassemble
GetCommandLineW'

Dump of assembler code for function kernelbase!GetCommandLineW:
   0x000000007b040950 <+0>:    mov    0x550c1(%rip),%rax        # 0x7b095a18
   0x000000007b040957 <+7>:    retq   
   0x000000007b040958 <+8>:    nopl   0x0(%rax,%rax,1)
--- snip ---

$ wine --version
wine-5.19-123-ge909986e6ea

Regards

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