Just a follow-up to this issue. It appears my test program *was* invalid, but I discovered why SDL wouldn't load properly.
As you can see in my initial bug report, SDL was attempting to convert a command line from UCS-2-INTERNAL to UTF-8 using win-iconv. "C" (as my test program had) is *definitely* invalid input! After going through the win-iconv source, I realized that win-iconv does not interpret the encoding name "UCS-2-INTERNAL" as being UTF-16. (Source here: https://github.com/win-iconv/win-iconv/blob/master/win_iconv.c#L950) Luckily, around line 167 of that same file, there are mappings from codpages to name, which are used by a conversion function. So I have added the "UCS-2-INTERNAL" string in the places shown above, and everything works so far... no more SDL errors. I have filed a pull-request with upstream development, which has moved from Google Code to github at: https://github.com/win-iconv/win-iconv. I've tried googling "UCS-2-INTERNAL", but I'm not sure why no one else has hit this issue. :( Hopefully this patch solves the issue. Regards, sdbenique On Sat, 12 Mar 2016 20:14:30 +0100 (CET), <sdbeni...@runbox.com> wrote: > Hello, > > I'm writing because I'm encountering a strange bug in cygwin's distributed > x86_64-w64-mingw32 libraries. Specifically a problem with win-iconv. > > -=System Info=- > OS(s): Windows 7 Professional, Windows 10 Professional Edition > Package(s): mingw64-{i686,x86_64}-win-iconv version: 0.0.6-2 > Cygwin: Cygwin64, Setup 2.873 > > > I first stared experiencing an issue with an SDL2 application I am developing. > I've been revamping my build toolkit to take advantage of the better mingw64 > support in newer releases of Cygwin. > > When I finally got my build system work with the host, build, target triplets, > I decided to try building some mingw32 binaries of the application. > Everything built fine, but for some reason the application always immediately > quit upon being ran, with the following error message: > > "Fatal Error: Out of memory aborting". > > This happens even on a machine with 16GB of memory, 10GB of it being free. > The i686 build as well as the x86_64 build encounters this issue as well. > > I downloaded the source code for mingw64-SDL2 and compiled it with > debuginfo. > > I narrowed down the issue to some code in in SDL_windows_main.c, > which calls SDL_iconv_string. > > Stepping into that function, the following executes: > Breakpoint 2, SDL_iconv_string (tocode=0x4052bc <__dyn_tls_init_callback+684> > "UTF-8", > fromcode=0x4052ad <__dyn_tls_init_callback+669> "UCS-2-INTERNAL", > inbuf=0x2e2dd2 "C", inbytesleft=116) > at /usr/src/debug/mingw64-x86_64-SDL2-2.0.1-1/src/stdlib/SDL_iconv.c:863 > > 863 size_t retCode = 0; > 865 cd = SDL_iconv_open(tocode, fromcode); > 866 if (cd == (SDL_iconv_t) - 1) { > 868 if (!tocode || !*tocode) { > 871 if (!fromcode || !*fromcode) { > 874 cd = SDL_iconv_open(tocode, fromcode); > 876 if (cd == (SDL_iconv_t) - 1) { > 877 return NULL; > > WinMain (hInst=0x400000, hPrev=0x0, szCmdLine=0x2e3859 "", sw=10) > at > /usr/src/debug/mingw64-x86_64-SDL2-2.0.1-1/src/main/windows/SDL_windows_main.c:164 > 164 if (cmdline == NULL) { > (gdb) > 165 return OutOfMemory(); > > At first I thought it could be a bug with SDL, but to make sure, I created a > very simple reproduction > of the issue using only the iconv libraray, and a simple main() function. > This "test" fails > on every machine on which I have ran it, in both 32-bit and 64-bit builds. > > #include <iconv.h> > #include <stdio.h> > #include <stdint.h> > > // Check GCC > #if __GNUC__ > #if __x86_64__ || __ppc64__ > #define PTR_T int64_t > #else > #define PTR_T int32_t > #endif > #endif > > int main(int argc, char * args[]) > { > iconv_t handle = iconv_open("C", "UTF-8"); > > if ((PTR_T) handle == -1) > { > printf("Could not open handle to iconv"); > } > > return 0; > } > > I've uploaded a small repository with a Makefile that will conveniently set > your $PATH > correctly and launch the .exe when you run build the target 'run'. > > For your convenience in recreating the issue, I have uploaded the repository > on github, > at the following URL. > > git clone git://github.com/bittwiddler1/mingw64-iconv-test > > I've never really submitted a bug report via mailing list, but please let me > know if you need any > other information and I will try my best to help out any way I can! > > I'll try and get some debug information out of the iconv.dll library, but no > promises. I > don't know much about text encoding, let alone unicode pages and whatnot. :) > > - sdbenique -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
