d7969012e4
An impilt used of C++ module without prebuild path may cause crash. For example: ``` // ./dir1/C.cppm export module C; // ./dir2/B.cppm export module B; import C; // ./A.cpp import B; import C; ``` When we compile A.cpp without the prebuild path of C.pcm, the compiler will crash. ``` clang++ -std=c++20 --precompile -c ./dir1/C.cppm -o ./dir1/C.pcm clang++ -std=c++20 --precompile -fprebuilt-module-path=./dir2 -c ./dir2/B.cppm -o ./dir2/B.pcm clang++ -std=c++20 -fprebuilt-module-path=./dir2 A.cpp ``` The prebuilt path of module C is cached when import module B, and in the function HeaderSearch::getCachedModuleFileName, the compiler try to get the filename by modulemap without check if modulemap exists, and there is no modulemap in C++ module. Reviewed By: ChuanqiXu Differential review: https://reviews.llvm.org/D119426
13 lines
644 B
C++
13 lines
644 B
C++
// This tests that the compiler wouldn't crash if the module path misses
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// RUN: rm -rf %t
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// RUN: mkdir -p %t/subdir
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// RUN: echo "export module C;" >> %t/subdir/C.cppm
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// RUN: echo -e "export module B;\nimport C;" >> %t/B.cppm
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/subdir/C.cppm -o %t/subdir/C.pcm
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface -fprebuilt-module-path=%t/subdir %t/B.cppm -o %t/B.pcm
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t %s -fsyntax-only -verify
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import B;
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import C; // expected-error {{module 'C' is needed but has not been provided, and implicit use of module files is disabled}}
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