http://llvm.org/bugs/show_bug.cgi?id=21800
Bug ID: 21800
Summary: MSABI Record Layout is broken with external sources
Product: clang
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
To reproduce this, one can run the following LLDB test:
D:\python_src\Python-2.7.8\PCbuild\python_d.exe
D:\src\llvm\tools\lldb\test/dotest.py -q --arch=i686 --executable
D:/src/llvm/build/ninja/bin/lldb.exe -s
D:/src/llvm/build/ninja/lldb-test-traces -u CXXFLAGS -u CFLAGS -C
D:\src\llvm\build\ninja\bin\clang.exe -p TestDataFormatterLibcxxVBool.py
D:\src\llvm\tools\lldb\test\functionalities\data-formatter\data-formatter-stl\libcxx\vbool
You will get the following assertion failure:
Assertion failed: Allowed && "Externally-placed field cannot be placed here",
file ..\..\tools\clang\lib\AST\RecordLayoutBuilder.cpp, line 1738
This is happening because in RecordLayoutBuilder.cpp, the following check in
ASTContext::getASTRecordLayout():
if (isMsLayout(D) && !D->getASTContext().getExternalSource()) {
NewEntry = BuildMicrosoftASTRecordLayout(D);
}
is failing since getExternalSource() is returning true, so it is trying to use
non-MSABI record layout.
Data formatter tests need to be disabled on Windows until this is fixed, so
please re-enable them, or file a bug to re-enable them, once this is fixed.
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