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llvm-project/clang/test/ClangScanDeps/modules-symlink.c

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[clang][deps] Handle symlinks in minimizing FS The minimizing and caching filesystem used by the dependency scanner can be configured to **not** minimize some files. That's necessary when scanning a TU with prebuilt inputs (i.e. PCH) that refer to the original (non-minimized) files. Minimizing such files in the dependency scanner would cause discrepancy between the current perceived state of the filesystem and the file sizes stored in the AST file. By not minimizing such files, we avoid creating the discrepancy. The problem with the current approach is that files that should not be minimized are identified by their path. This breaks down when the prebuilt input (PCH) and the current TU refer to the same file via different paths (i.e. symlinks). This patch switches from paths to `llvm::sys::fs::UniqueID` when identifying ignored files. This is consistent with how the rest of Clang treats files. Depends on D114966. Reviewed By: dexonsmith, arphaman Differential Revision: https://reviews.llvm.org/D114971
2022-01-21 18:18:22 +08:00
// RUN: rm -rf %t
// RUN: split-file %s %t
[NFC][AIX]Disable new pcm tests on AIX Same as D114481, the PCH reader looks for a `__clangast` section in the precompiled module file, which isn't present on AIX, and we don't support writing this custom section in XCOFF yet. Reviewed By: Jake-Egan, daltenty, sfertile Differential Revision: https://reviews.llvm.org/D118477
2022-01-29 01:38:50 +08:00
// Unsupported on AIX because we don't support the requisite "__clangast"
// section in XCOFF yet.
// UNSUPPORTED: system-windows, aix
[clang][deps] Handle symlinks in minimizing FS The minimizing and caching filesystem used by the dependency scanner can be configured to **not** minimize some files. That's necessary when scanning a TU with prebuilt inputs (i.e. PCH) that refer to the original (non-minimized) files. Minimizing such files in the dependency scanner would cause discrepancy between the current perceived state of the filesystem and the file sizes stored in the AST file. By not minimizing such files, we avoid creating the discrepancy. The problem with the current approach is that files that should not be minimized are identified by their path. This breaks down when the prebuilt input (PCH) and the current TU refer to the same file via different paths (i.e. symlinks). This patch switches from paths to `llvm::sys::fs::UniqueID` when identifying ignored files. This is consistent with how the rest of Clang treats files. Depends on D114966. Reviewed By: dexonsmith, arphaman Differential Revision: https://reviews.llvm.org/D114971
2022-01-21 18:18:22 +08:00
//--- cdb_pch.json
[
{
"directory": "DIR",
"command": "clang -x c-header DIR/pch.h -fmodules -gmodules -fimplicit-module-maps -fmodules-cache-path=DIR/cache -o DIR/pch.h.gch",
"file": "DIR/pch.h"
}
]
//--- cdb_tu.json
[
{
"directory": "DIR",
"command": "clang -c DIR/tu.c -fmodules -gmodules -fimplicit-module-maps -fmodules-cache-path=DIR/cache -include DIR/pch.h -o DIR/tu.o",
"file": "DIR/tu.c"
}
]
//--- module.modulemap
module mod { header "symlink.h" }
//--- pch.h
#include "symlink.h"
//--- original.h
// Comment that will be stripped by the minimizer.
#define MACRO 1
//--- tu.c
#include "original.h"
static int foo = MACRO; // Macro usage that will trigger
// input file consistency checks.
// RUN: ln -s %t/original.h %t/symlink.h
// RUN: sed -e "s|DIR|%/t|g" %t/cdb_pch.json > %t/cdb.json
// RUN: clang-scan-deps -compilation-database %t/cdb.json -format experimental-full \
// RUN: -generate-modules-path-args -module-files-dir %t/build > %t/result_pch.json
//
[clang][deps] Create lit substitution for deps-to-rsp This patch gets rid of the ridiculous relative path we use to invoke the `module-deps-to-rsp.py` script and creates proper lit substitution, cleaning up the tests. Reviewed By: dexonsmith Differential Revision: https://reviews.llvm.org/D121525
2022-03-23 21:59:03 +08:00
// RUN: %deps-to-rsp %t/result_pch.json --module-name=mod > %t/mod.cc1.rsp
// RUN: %deps-to-rsp %t/result_pch.json --tu-index=0 > %t/pch.rsp
[clang][deps] Handle symlinks in minimizing FS The minimizing and caching filesystem used by the dependency scanner can be configured to **not** minimize some files. That's necessary when scanning a TU with prebuilt inputs (i.e. PCH) that refer to the original (non-minimized) files. Minimizing such files in the dependency scanner would cause discrepancy between the current perceived state of the filesystem and the file sizes stored in the AST file. By not minimizing such files, we avoid creating the discrepancy. The problem with the current approach is that files that should not be minimized are identified by their path. This breaks down when the prebuilt input (PCH) and the current TU refer to the same file via different paths (i.e. symlinks). This patch switches from paths to `llvm::sys::fs::UniqueID` when identifying ignored files. This is consistent with how the rest of Clang treats files. Depends on D114966. Reviewed By: dexonsmith, arphaman Differential Revision: https://reviews.llvm.org/D114971
2022-01-21 18:18:22 +08:00
//
// RUN: %clang @%t/mod.cc1.rsp
[clang][deps] Return the whole TU command line The dependency scanner already generates canonical -cc1 command lines that can be used to compile discovered modular dependencies. For translation unit command lines, the scanner only generates additional driver arguments the build system is expected to append to the original command line. While this works most of the time, there are situations where that's not the case. For example with `-Wunused-command-line-argument`, Clang will complain about the `-fmodules-cache-path=` argument that's not being used in explicit modular builds. Combine that with `-Werror` and the build outright fails. To prevent such failures, this patch changes the dependency scanner to return the full driver command line to compile the original translation unit. This gives us more opportunities to massage the arguments into something reasonable. Reviewed By: Bigcheese Differential Revision: https://reviews.llvm.org/D118986
2022-02-23 21:51:40 +08:00
// RUN: %clang @%t/pch.rsp
[clang][deps] Handle symlinks in minimizing FS The minimizing and caching filesystem used by the dependency scanner can be configured to **not** minimize some files. That's necessary when scanning a TU with prebuilt inputs (i.e. PCH) that refer to the original (non-minimized) files. Minimizing such files in the dependency scanner would cause discrepancy between the current perceived state of the filesystem and the file sizes stored in the AST file. By not minimizing such files, we avoid creating the discrepancy. The problem with the current approach is that files that should not be minimized are identified by their path. This breaks down when the prebuilt input (PCH) and the current TU refer to the same file via different paths (i.e. symlinks). This patch switches from paths to `llvm::sys::fs::UniqueID` when identifying ignored files. This is consistent with how the rest of Clang treats files. Depends on D114966. Reviewed By: dexonsmith, arphaman Differential Revision: https://reviews.llvm.org/D114971
2022-01-21 18:18:22 +08:00
// RUN: sed -e "s|DIR|%/t|g" %t/cdb_tu.json > %t/cdb.json
// RUN: clang-scan-deps -compilation-database %t/cdb.json -format experimental-full \
// RUN: -generate-modules-path-args -module-files-dir %t/build > %t/result_tu.json