Bug 14327 – Unhandled exception from writeln() in C++/D application

With this C++ application: extern "C" int rt_init(); // prototypes of standard D runtime functions extern "C" void rt_term(); extern "C" void dfunc(); int main() { auto dinit = rt_init(); // returns 1 dfunc(); // causes unhandled exception } and linking to this D library: module lib; extern(C) void dfunc() { import std.stdio; writeln("Hello from D!"); } int main() { return 0; } call to dfunc() on C++ side causes Unhandled exception in stdio.d line 2917: // Specialization for strings - a very frequent case auto w = .trustedStdout.lockingTextWriter(); initial report on D forums [1] leads potential issue with stdio module static initialization failure. Using Visual Studio 2012, x64 app, Win 7 x64 [1] http://forum.dlang.org/thread/[email protected]#post-mailman.397.1409844359.5783.digitalmars-d-learn:40puremagic.com

Why are there two main functions?

I can't even get this application to link... keep getting minfo_beg/minfo_end errors (with both -m64 and -m32mscoff).

(In reply to Vladimir Panteleev from comment #1) > Why are there two main functions? Without main() in D library link errors occur

(In reply to Vladimir Panteleev from comment #2) > I can't even get this application to link... keep getting > minfo_beg/minfo_end errors (with both -m64 and -m32mscoff). m32mscoff won't work as there is no coff32 phobos. What link errors are you getting?

(In reply to Szymon Gatner from comment #4) > m32mscoff won't work as there is no coff32 phobos. Build my own. > What link errors are you getting? --------------------------------------------- C:\Temp\D\issues\14327> "C:\Downloads\!dmd\dmd.2.066.0\dmd2\windows\bin\dmd.exe" -c -m64 lib.d C:\Temp\D\issues\14327> cl test.cpp lib.obj "C:\Downloads\!dmd\dmd.2.066.0\dmd2\windows\lib64\phobos64.lib" Microsoft (R) C/C++ Optimizing Compiler Version 18.00.30723 for x64 Copyright (C) Microsoft Corporation. All rights reserved. test.cpp Microsoft (R) Incremental Linker Version 12.00.30723.0 Copyright (C) Microsoft Corporation. All rights reserved. /out:test.exe test.obj lib.obj C:\Downloads\!dmd\dmd.2.066.0\dmd2\windows\lib64\phobos64.lib phobos64.lib(dmain2_4ec_2f9.obj) : error LNK2019: unresolved external symbol _deh_beg referenced in function rt_init phobos64.lib(sections_win64_575_4e2.obj) : error LNK2001: unresolved external symbol _deh_beg phobos64.lib(sections_win64_57b_5a5.obj) : error LNK2019: unresolved external symbol _minfo_end referenced in function _D2rt14sections_win6414getModuleInfosFZAyPS6object10ModuleInfo phobos64.lib(sections_win64_57b_5a5.obj) : error LNK2019: unresolved external symbol _minfo_beg referenced in function _D2rt14sections_win6414getModuleInfosFZAyPS6object10ModuleInfo phobos64.lib(sections_win64_575_4e2.obj) : error LNK2019: unresolved external symbol _deh_end referenced in function _D2rt14sections_win6412SectionGroup8ehTablesMxFNdZAyS2rt15deh_win64_posix9FuncTable test.exe : fatal error LNK1120: 4 unresolved externals --------------------------------------------- Please supply exact commands to reproduce the problem, I guess

(In reply to Vladimir Panteleev from comment #5) > (In reply to Szymon Gatner from comment #4) > > m32mscoff won't work as there is no coff32 phobos. > > Build my own. > > > What link errors are you getting? > > --------------------------------------------- > C:\Temp\D\issues\14327> > "C:\Downloads\!dmd\dmd.2.066.0\dmd2\windows\bin\dmd.exe" -c -m64 lib.d > > C:\Temp\D\issues\14327> cl test.cpp lib.obj > "C:\Downloads\!dmd\dmd.2.066.0\dmd2\windows\lib64\phobos64.lib" > Microsoft (R) C/C++ Optimizing Compiler Version 18.00.30723 for x64 > Copyright (C) Microsoft Corporation. All rights reserved. > > test.cpp > Microsoft (R) Incremental Linker Version 12.00.30723.0 > Copyright (C) Microsoft Corporation. All rights reserved. > > /out:test.exe > test.obj > lib.obj > C:\Downloads\!dmd\dmd.2.066.0\dmd2\windows\lib64\phobos64.lib > phobos64.lib(dmain2_4ec_2f9.obj) : error LNK2019: unresolved external symbol > _deh_beg referenced in function rt_init > phobos64.lib(sections_win64_575_4e2.obj) : error LNK2001: unresolved > external symbol _deh_beg > phobos64.lib(sections_win64_57b_5a5.obj) : error LNK2019: unresolved > external symbol _minfo_end referenced in function > _D2rt14sections_win6414getModuleInfosFZAyPS6object10ModuleInfo > phobos64.lib(sections_win64_57b_5a5.obj) : error LNK2019: unresolved > external symbol _minfo_beg referenced in function > _D2rt14sections_win6414getModuleInfosFZAyPS6object10ModuleInfo > phobos64.lib(sections_win64_575_4e2.obj) : error LNK2019: unresolved > external symbol _deh_end referenced in function > _D2rt14sections_win6412SectionGroup8ehTablesMxFNdZAyS2rt15deh_win64_posix9Fun > cTable > test.exe : fatal error LNK1120: 4 unresolved externals > --------------------------------------------- > > > Please supply exact commands to reproduce the problem, I guess Doing everything in IDE. Will try to get to build logs and commands used

Build started 2015-04-03 22:49:35. 1>Project "C:\Users\bravo\documents\visual studio 2012\Projects\CppDMix\CppDMix\CppDMix.vcxproj" on node 2 (Build target(s)). 1>ClCompile: C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin\x86_amd64\CL.exe /c /Zi /nologo /W3 /WX- /Od /D WIN32 /D _DEBUG /D _CONSOLE /D _UNICODE /D UNICODE /Gm /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Fo"x64\Debug\\" /Fd"x64\Debug\vc110.pdb" /Gd /TP /errorReport:prompt main.cpp main.cpp Link: C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin\x86_amd64\link.exe /ERRORREPORT:PROMPT /OUT:"C:\Users\bravo\documents\visual studio 2012\Projects\CppDMix\x64\Debug\CppDMix.exe" /INCREMENTAL /NOLOGO /LIBPATH:D:\devel\D\dmd2\windows\lib64 /LIBPATH:"C:\Users\bravo\Documents\visual studio 2012\Projects\CppDMix\dlib\Debug" phobos64.lib dlib.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /MANIFEST /MANIFESTUAC:"level='asInvoker' uiAccess='false'" /manifest:embed /DEBUG /PDB:"C:\Users\bravo\documents\visual studio 2012\Projects\CppDMix\x64\Debug\CppDMix.pdb" /SUBSYSTEM:CONSOLE /TLBID:1 /DYNAMICBASE /NXCOMPAT /IMPLIB:"C:\Users\bravo\documents\visual studio 2012\Projects\CppDMix\x64\Debug\CppDMix.lib" /MACHINE:X64 x64\Debug\main.obj CppDMix.vcxproj -> C:\Users\bravo\documents\visual studio 2012\Projects\CppDMix\x64\Debug\CppDMix.exe 1>Done Building Project "C:\Users\bravo\documents\visual studio 2012\Projects\CppDMix\CppDMix\CppDMix.vcxproj" (Build target(s)). Build succeeded. Time Elapsed 00:00:00.32

I'm still seeing the same errors. How are you compiling dlib.lib?

I assume that was agnerated by VisualD: set PATH=D:\devel\D\dmd2\windows\\bin;C:\Program Files (x86)\Windows Kits\8.1\\\bin;%PATH% set DMD_LIB=C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\\lib\amd64;C:\Program Files (x86)\Windows Kits\8.1\Lib\winv6.3\um\x64 set WindowsSdkDir=C:\Program Files (x86)\Windows Kits\8.1\ set VCINSTALLDIR=C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\ "C:\Program Files (x86)\VisualD\pipedmd.exe" dmd -lib -m64 -g -debug -X -Xf"Debug\dlib.json" -deps="Debug\dlib.dep" -of"Debug\dlib.lib" -map "Debug\dlib.map" lib.d if errorlevel 1 goto reportError if not exist "Debug\dlib.lib" (echo "Debug\dlib.lib" not created! && goto reportError) goto noError :reportError echo Building Debug\dlib.lib failed! :noError

Did it help to reproduce?

Just tested the same with Visual Studio 2015 and Beta D 2.069.0-b1 using mscoff32 version of phobos. Bug still persists I am afraid. This time excpetion is thrown from stdio.d line 3076: auto w = .trustedStdout.lockingTextWriter();

The problem is that the stdin,stdout,stderr handles are only initialized when running d_run_main, but not rt_init.

Commits pushed to master at https://github.com/D-Programming-Language/druntime https://github.com/D-Programming-Language/druntime/commit/848c97c52186934dae807e2b0923c8fbb0f17e15 issue 14327: move call to init_msvc() into rt_init() https://github.com/D-Programming-Language/druntime/commit/1c95b5827012f448d2d917c98dd310ac211dec69 Merge pull request #1412 from rainers/issue_14327 issue 14327: move call to init_msvc() into rt_init()

Commit pushed to stable at https://github.com/D-Programming-Language/druntime https://github.com/D-Programming-Language/druntime/commit/de2788d911129545531e0e42d1c8630b3f406e7c Merge pull request #1412 from rainers/issue_14327 issue 14327: move call to init_msvc() into rt_init()

Commit pushed to stable at https://github.com/D-Programming-Language/druntime https://github.com/D-Programming-Language/druntime/commit/82715d0589d815a77c7139a59193899866a35f02 fixed Issue 14327 - Unhandled exception from writeln() - this is an empty dummy commit to close the bugzilla issue and generate a changelog entry - see #1412 (and de2788d911) for the original fix

Commits pushed to stable at https://github.com/D-Programming-Language/druntime https://github.com/D-Programming-Language/druntime/commit/848c97c52186934dae807e2b0923c8fbb0f17e15 issue 14327: move call to init_msvc() into rt_init() https://github.com/D-Programming-Language/druntime/commit/1c95b5827012f448d2d917c98dd310ac211dec69 Merge pull request #1412 from rainers/issue_14327

Commits pushed to master at https://github.com/D-Programming-Language/druntime https://github.com/D-Programming-Language/druntime/commit/de2788d911129545531e0e42d1c8630b3f406e7c Merge pull request #1412 from rainers/issue_14327 https://github.com/D-Programming-Language/druntime/commit/82715d0589d815a77c7139a59193899866a35f02 fixed Issue 14327 - Unhandled exception from writeln()