From: "luislavena (Luis Lavena)" Date: 2012-07-27T22:55:21+09:00 Subject: [ruby-core:46814] [ruby-trunk - Bug #6790] mingw-w64: rb_libruby_handle and libruby changes when extensions are loaded Issue #6790 has been updated by luislavena (Luis Lavena). Thank you Heesob Park, Usaku Nakamura and Nobu for fixing this! ---------------------------------------- Bug #6790: mingw-w64: rb_libruby_handle and libruby changes when extensions are loaded https://bugs.ruby-lang.org/issues/6790#change-28488 Author: luislavena (Luis Lavena) Status: Closed Priority: Normal Assignee: nobu (Nobuyoshi Nakada) Category: core Target version: 2.0.0 ruby -v: ruby 2.0.0dev (2012-07-25 trunk 36527) [x64-mingw32] =begin Hello, I started to look into this failure when running dl/handle tests: test_initialize_noargs(DL::TestHandle): DL::DLError: unknown symbol "rb_str_new" C:/Users/Worker/Jenkins/workspace/git-ruby-trunk/test/dl/test_handle.rb:110:in `[]' C:/Users/Worker/Jenkins/workspace/git-ruby-trunk/test/dl/test_handle.rb:110:in `test_initialize_noargs' Above error only happens with compiled 64bits ruby. After looking a bit more closer, it seems DllMain from libruby gets called several times when (({x64-msvcrt-ruby200.dll})) is loaded but also when extensions are loaded. Adding some debug strings into DllMain like the following: diff --git a/ruby.c b/ruby.c index ab4b674..6d1a715 100644 --- a/ruby.c +++ b/ruby.c @@ -315,8 +315,22 @@ static HMODULE libruby; BOOL WINAPI DllMain(HINSTANCE dll, DWORD reason, LPVOID reserved) { + HMODULE self; + char filename[MAX_PATH]; + if (reason == DLL_PROCESS_ATTACH) - libruby = dll; + { + printf("DLL_PROCESS_ATTACH\n"); + + self = GetModuleHandle(NULL); + GetModuleFileName(self, filename, MAX_PATH); + printf("self: %#x (%s)\n", self, filename); + + GetModuleFileName(dll, filename, MAX_PATH); + printf("dll: %#x (%s)\n", dll, filename); + + libruby = dll; + } return TRUE; } Produces the following: 32bits compilation: C:\Users\Luis\Code\ruby\ruby\x86-installed>ruby -v -rdl -e "puts :ok" DLL_PROCESS_ATTACH self: 0x400000 (C:\Users\Luis\Code\ruby\ruby\x86-installed\bin\ruby.exe) dll: 0x66780000 (C:\Users\Luis\Code\ruby\ruby\x86-installed\bin\msvcrt-ruby200.dll) ruby 2.0.0dev (2012-07-25 trunk 36527) [i386-mingw32] ok 64bits (mingw-w64): C:\Users\Luis\Code\ruby\ruby\x64-installed>ruby -v -rdl -e "puts :ok" DLL_PROCESS_ATTACH self: 0x400000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\bin\ruby.exe) dll: 0x6f100000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\bin\x64-msvcrt-ruby200.dll) ruby 2.0.0dev (2012-07-25 trunk 36527) [x64-mingw32] DLL_PROCESS_ATTACH self: 0x400000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\bin\ruby.exe) dll: 0x1ee0000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\lib\ruby\2.0.0\x64-mingw32\enc\encdb.so) DLL_PROCESS_ATTACH self: 0x400000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\bin\ruby.exe) dll: 0x6aa00000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\lib\ruby\2.0.0\x64-mingw32\enc\iso_8859_1.so) DLL_PROCESS_ATTACH self: 0x400000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\bin\ruby.exe) dll: 0x68080000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\lib\ruby\2.0.0\x64-mingw32\enc\trans\transdb.so) DLL_PROCESS_ATTACH self: 0x400000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\bin\ruby.exe) dll: 0x623c0000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\lib\ruby\2.0.0\x64-mingw32\dl.so) DLL_PROCESS_ATTACH self: 0x400000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\bin\ruby.exe) dll: 0x63d80000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\lib\ruby\2.0.0\x64-mingw32\fiddle.so) DLL_PROCESS_ATTACH self: 0x400000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\bin\ruby.exe) dll: 0x6e6c0000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\lib\ruby\2.0.0\x64-mingw32\enc\utf_16le.so) DLL_PROCESS_ATTACH self: 0x400000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\bin\ruby.exe) dll: 0x6a340000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\lib\ruby\2.0.0\x64-mingw32\enc\trans\single_byte.so) DLL_PROCESS_ATTACH self: 0x400000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\bin\ruby.exe) dll: 0x1f10000 (C:\Users\Luis\Code\ruby\ruby\x64-installed\lib\ruby\2.0.0\x64-mingw32\enc\trans\utf_16_32.so) ok I just tested a simple project which loads multiple DLLs and DllMain of each DLL do not get invoked several times. Since each extension depends on (({x86-msvcrt-ruby200.dll})), perhaps that is the reason why (({DllMain})) is invoked multiple times. Maybe there is something I'm missing? Perhaps a workaround will be set (({libruby})) only once? =end -- http://bugs.ruby-lang.org/