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llvm-project/lld/test/COFF/entry-inference.test

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COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
# RUN: sed -e s/ENTRYNAME/main/ %s | yaml2obj > %t.obj
COFF: Make test commands shorter. NFC. llvm-svn: 244227
2015-08-07 00:47:46 +08:00
# RUN: not lld-link /out:%t.exe %t.obj > %t.log 2>&1
COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
# RUN: FileCheck -check-prefix=MAIN %s < %t.log
lld-link: Several tweaks to default entry point selection. Three related changes: 1. link.exe uses the presence of main and wmain to decide if it should call mainCRTStartup or wmainCRTStartup, even if /nodefaultlib is passed. For compatibility, remove FindMain logic. 2. Default to the non-wide entrypoint if main is not found. This has two effects: 2a. In normal links, lld-link now prints lld-link: error: undefined symbol: _main >>> referenced by f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:78 >>> libcmt.lib(exe_main.obj):("int __cdecl invoke_main(void)" (?invoke_main@@YAHXZ)) >>> referenced by f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283 >>> libcmt.lib(exe_main.obj):("int __cdecl __scrt_common_main_seh(void)" (?__scrt_common_main_seh@@YAHXZ)) instead of lld-link: error: entry point must be defined This is arguably a better error message, since it now mentions that _main is missing. (This matches link.exe's diagnostic in this case.) 2b. With /nodefautlib, we now default to mainCRTStartup if no main() is present, again matching link.exe. This makes r337407 obsolete. This means if you have a cc file containing both mainCRTStartup and wmainCRTStartup and you pass /nodefaultlib /subsystem:console, lld-link will now call mainCRTStartup, matching link.exe 3. Print a warning if both main and wmain are present, similar to link.exe's LNK4067. Differential Revision: https://reviews.llvm.org/D52832 llvm-svn: 343698
2018-10-04 01:01:39 +08:00
# RUN: not lld-link /nodefaultlib /out:%t.exe %t.obj > %t.log 2>&1
# RUN: FileCheck -check-prefix=MAIN %s < %t.log
COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
# RUN: sed s/ENTRYNAME/wmain/ %s | yaml2obj > %t.obj
COFF: Make test commands shorter. NFC. llvm-svn: 244227
2015-08-07 00:47:46 +08:00
# RUN: not lld-link /out:%t.exe %t.obj > %t.log 2>&1
COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
# RUN: FileCheck -check-prefix=WMAIN %s < %t.log
lld-link: Several tweaks to default entry point selection. Three related changes: 1. link.exe uses the presence of main and wmain to decide if it should call mainCRTStartup or wmainCRTStartup, even if /nodefaultlib is passed. For compatibility, remove FindMain logic. 2. Default to the non-wide entrypoint if main is not found. This has two effects: 2a. In normal links, lld-link now prints lld-link: error: undefined symbol: _main >>> referenced by f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:78 >>> libcmt.lib(exe_main.obj):("int __cdecl invoke_main(void)" (?invoke_main@@YAHXZ)) >>> referenced by f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283 >>> libcmt.lib(exe_main.obj):("int __cdecl __scrt_common_main_seh(void)" (?__scrt_common_main_seh@@YAHXZ)) instead of lld-link: error: entry point must be defined This is arguably a better error message, since it now mentions that _main is missing. (This matches link.exe's diagnostic in this case.) 2b. With /nodefautlib, we now default to mainCRTStartup if no main() is present, again matching link.exe. This makes r337407 obsolete. This means if you have a cc file containing both mainCRTStartup and wmainCRTStartup and you pass /nodefaultlib /subsystem:console, lld-link will now call mainCRTStartup, matching link.exe 3. Print a warning if both main and wmain are present, similar to link.exe's LNK4067. Differential Revision: https://reviews.llvm.org/D52832 llvm-svn: 343698
2018-10-04 01:01:39 +08:00
# RUN: not lld-link /nodefaultlib /out:%t.exe %t.obj > %t.log 2>&1
# RUN: FileCheck -check-prefix=WMAIN %s < %t.log
COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
# RUN: sed s/ENTRYNAME/WinMain/ %s | yaml2obj > %t.obj
COFF: Make test commands shorter. NFC. llvm-svn: 244227
2015-08-07 00:47:46 +08:00
# RUN: not lld-link /out:%t.exe %t.obj > %t.log 2>&1
COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
# RUN: FileCheck -check-prefix=WINMAIN %s < %t.log
lld-link: Several tweaks to default entry point selection. Three related changes: 1. link.exe uses the presence of main and wmain to decide if it should call mainCRTStartup or wmainCRTStartup, even if /nodefaultlib is passed. For compatibility, remove FindMain logic. 2. Default to the non-wide entrypoint if main is not found. This has two effects: 2a. In normal links, lld-link now prints lld-link: error: undefined symbol: _main >>> referenced by f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:78 >>> libcmt.lib(exe_main.obj):("int __cdecl invoke_main(void)" (?invoke_main@@YAHXZ)) >>> referenced by f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283 >>> libcmt.lib(exe_main.obj):("int __cdecl __scrt_common_main_seh(void)" (?__scrt_common_main_seh@@YAHXZ)) instead of lld-link: error: entry point must be defined This is arguably a better error message, since it now mentions that _main is missing. (This matches link.exe's diagnostic in this case.) 2b. With /nodefautlib, we now default to mainCRTStartup if no main() is present, again matching link.exe. This makes r337407 obsolete. This means if you have a cc file containing both mainCRTStartup and wmainCRTStartup and you pass /nodefaultlib /subsystem:console, lld-link will now call mainCRTStartup, matching link.exe 3. Print a warning if both main and wmain are present, similar to link.exe's LNK4067. Differential Revision: https://reviews.llvm.org/D52832 llvm-svn: 343698
2018-10-04 01:01:39 +08:00
# RUN: not lld-link /nodefaultlib /out:%t.exe %t.obj > %t.log 2>&1
# RUN: FileCheck -check-prefix=WINMAIN %s < %t.log
COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
# RUN: sed s/ENTRYNAME/wWinMain/ %s | yaml2obj > %t.obj
COFF: Make test commands shorter. NFC. llvm-svn: 244227
2015-08-07 00:47:46 +08:00
# RUN: not lld-link /out:%t.exe %t.obj > %t.log 2>&1
COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
# RUN: FileCheck -check-prefix=WWINMAIN %s < %t.log
lld-link: Several tweaks to default entry point selection. Three related changes: 1. link.exe uses the presence of main and wmain to decide if it should call mainCRTStartup or wmainCRTStartup, even if /nodefaultlib is passed. For compatibility, remove FindMain logic. 2. Default to the non-wide entrypoint if main is not found. This has two effects: 2a. In normal links, lld-link now prints lld-link: error: undefined symbol: _main >>> referenced by f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:78 >>> libcmt.lib(exe_main.obj):("int __cdecl invoke_main(void)" (?invoke_main@@YAHXZ)) >>> referenced by f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283 >>> libcmt.lib(exe_main.obj):("int __cdecl __scrt_common_main_seh(void)" (?__scrt_common_main_seh@@YAHXZ)) instead of lld-link: error: entry point must be defined This is arguably a better error message, since it now mentions that _main is missing. (This matches link.exe's diagnostic in this case.) 2b. With /nodefautlib, we now default to mainCRTStartup if no main() is present, again matching link.exe. This makes r337407 obsolete. This means if you have a cc file containing both mainCRTStartup and wmainCRTStartup and you pass /nodefaultlib /subsystem:console, lld-link will now call mainCRTStartup, matching link.exe 3. Print a warning if both main and wmain are present, similar to link.exe's LNK4067. Differential Revision: https://reviews.llvm.org/D52832 llvm-svn: 343698
2018-10-04 01:01:39 +08:00
# RUN: not lld-link /nodefaultlib /out:%t.exe %t.obj > %t.log 2>&1
# RUN: FileCheck -check-prefix=WWINMAIN %s < %t.log
COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
Use error() instead of warn() to report undefined symbols. I believe the reason why we used warn() instead of error() to report undefined symbols is because the older implementation of error() exitted immediately. Here, we want to find as many undefined symbols as we can, so I chose to use warn() instead of error(). Now error() does not exit immediately, so it doesn't make sense to keep them as warnings. Differential Revision: https://reviews.llvm.org/D38652 llvm-svn: 315131
2017-10-07 07:43:54 +08:00
# MAIN: error: <root>: undefined symbol: mainCRTStartup
# WMAIN: error: <root>: undefined symbol: wmainCRTStartup
# WINMAIN: error: <root>: undefined symbol: WinMainCRTStartup
# WWINMAIN: error: <root>: undefined symbol: wWinMainCRTStartup
COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
[yaml2obj] Updating LLD tests to account for LLVM r273915 This removed the -format flag from yaml2obj in favor of YAML tags. llvm-svn: 273920
2016-06-28 04:17:08 +08:00
--- !COFF
COFF: Infer entry symbol name if /entry is not given. `main` is not the only main function in Windows. You can choose one from these four -- {w,}{WinMain,main}. There are four different entry point functions for them, {w,}{WinMain,main}CRTStartup, respectively. The linker needs to choose the right one depending on which `main` function is defined. llvm-svn: 238667
2015-05-31 11:34:08 +08:00
header:
Machine: IMAGE_FILE_MACHINE_AMD64
Characteristics: []
sections:
- Name: .text
Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
Alignment: 4
SectionData: B82A000000C3
symbols:
- Name: .text
Value: 0
SectionNumber: 1
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 6
NumberOfRelocations: 0
NumberOfLinenumbers: 0
CheckSum: 0
Number: 0
- Name: ENTRYNAME
Value: 0
SectionNumber: 1
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_EXTERNAL
...