Re: [Boost-bugs] [Boost C++ Libraries] #9450: fstream open utf8 filename fails x86_64-w64-mingw32

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9450: fstream open utf8 filename fails x86_64-w64-mingw32
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-03-14 09:27:17

#9450: fstream open utf8 filename fails x86_64-w64-mingw32
-------------------------------+------------------------
  Reporter:  spoo@…            |      Owner:  bemandawes
      Type:  Bugs              |     Status:  new
 Milestone:  To Be Determined  |  Component:  filesystem
   Version:  Boost 1.55.0      |   Severity:  Problem
Resolution:                    |   Keywords:
-------------------------------+------------------------

Comment (by spoo@…):

 Here's a WINEDBG=+relay trace snip for a working example using _wopen:
 {{{
 0024:Call msvcrt._wfopen(00404012 L"\6e90\5c4b.txt",0040400c L"rb")
 ret=00401532
 0024:Call KERNEL32.CreateFileW(00404012
 L"\6e90\5c4b.txt",80000000,00000003,0032f950,ffffffff00000003,00000080,00000000)
 ret=7fa609f2952b
 0024:Ret  KERNEL32.CreateFileW() retval=0000004c ret=7fa609f2952b
 0024:Ret  msvcrt._wfopen() retval=7fa60a1a0c60 ret=00401532
 }}}

 Here's the trace snip for the broken example with boost (fstream.cxx):
 {{{
 0024:Call msvcrt.fopen(00049628 "\xe6\xba\x90\xe5\xb1\x8b.txt",004d0778
 "r") ret=00486efb
 0024:Call ntdll.RtlAllocateHeap(00010000,00000000,00000016)
 ret=7f3fa25e446c
 0024:Ret  ntdll.RtlAllocateHeap() retval=00049740 ret=7f3fa25e446c
 0024:Call KERNEL32.MultiByteToWideChar(00000000,00000001,00049628
 "\xe6\xba\x90\xe5\xb1\x8b.txt",0000000b,00049740,0000000b)
 ret=7f3fa25cd130
 0024:Ret  KERNEL32.MultiByteToWideChar() retval=0000000b ret=7f3fa25cd130
 0024:Call ntdll.RtlAllocateHeap(00010000,00000000,00000004)
 ret=7f3fa25e446c
 0024:Ret  ntdll.RtlAllocateHeap() retval=000435d0 ret=7f3fa25e446c
 0024:Call KERNEL32.MultiByteToWideChar(00000000,00000001,004d0778
 "r",00000002,000435d0,00000002) ret=7f3fa25cd130
 0024:Ret  KERNEL32.MultiByteToWideChar() retval=00000002 ret=7f3fa25cd130
 0024:Call KERNEL32.CreateFileW(00049740
 L"\00e6\00ba\0090\00e5\00b1\2039.txt",80000000,00000003,0032f4c0,00000003,00000080,00000000)
 ret=7f3fa25dc52b
 0024:Ret  KERNEL32.CreateFileW() retval=ffffffffffffffff ret=7f3fa25dc52b
 0024:Call ntdll.RtlFreeHeap(00010000,00000000,00049740) ret=7f3fa25e058f
 0024:Ret  ntdll.RtlFreeHeap() retval=00000001 ret=7f3fa25e058f
 0024:Call ntdll.RtlFreeHeap(00010000,00000000,000435d0) ret=7f3fa25e0597
 0024:Ret  ntdll.RtlFreeHeap() retval=00000001 ret=7f3fa25e0597
 0024:Ret  msvcrt.fopen() retval=00000000 ret=00486efb
 }}}

 I'm not sure what the call equivalencies are but I think that's all from
 the second example.  If I had to hazard a guess, it looks like the problem
 might be that it's not converting the string to wide characters and using
 the corresponding msvcrt call.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9450#comment:1>
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