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llvm-project/clang/test/Modules/diagnostics.modulemap

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Support lazy stat'ing of files referenced by module maps. This patch adds support for a `header` declaration in a module map to specify certain `stat` information (currently, size and mtime) about that header file. This has two purposes: - It removes the need to eagerly `stat` every file referenced by a module map. Instead, we track a list of unresolved header files with each size / mtime (actually, for simplicity, we track submodules with such headers), and when attempting to look up a header file based on a `FileEntry`, we check if there are any unresolved header directives with that `FileEntry`'s size / mtime and perform deferred `stat`s if so. - It permits a preprocessed module to be compiled without the original files being present on disk. The only reason we used to need those files was to get the `stat` information in order to do header -> module lookups when using the module. If we're provided with the `stat` information in the preprocessed module, we can avoid requiring the files to exist. Unlike most `header` directives, if a `header` directive with `stat` information has no corresponding on-disk file the enclosing module is *not* marked unavailable (so that behavior is consistent regardless of whether we've resolved a header directive, and so that preprocessed modules don't get marked unavailable). We could actually do this for all `header` directives: the only reason we mark the module unavailable if headers are missing is to give a diagnostic slightly earlier (rather than waiting until we actually try to build the module / load and validate its .pcm file). Differential Revision: https://reviews.llvm.org/D33703 llvm-svn: 304515
2017-06-02 09:55:39 +08:00
// RUN: not %clang_cc1 -fmodules -fmodules-cache-path=%t -fmodule-map-file=%S/Inputs/diagnostics-aux.modulemap -fmodule-map-file=%s -fsyntax-only -x c++ /dev/null 2>&1 | FileCheck %s --implicit-check-not error:
PR22299: Relocate code for handling -fmodule-map-file= so that we don't try to produce diagnostics with source locations before the diagnostics system is ready for them. llvm-svn: 226882
2015-01-23 08:01:13 +08:00
[modules] When diagnosing errors in module map files found by 'extern module' declarations, show how we got to that module map file. llvm-svn: 242105
2015-07-14 10:06:01 +08:00
// CHECK: In file included from {{.*}}diagnostics-aux.modulemap:3:
// CHECK: diagnostics-aux-2.modulemap:2:3: error: expected
PR22299: Relocate code for handling -fmodule-map-file= so that we don't try to produce diagnostics with source locations before the diagnostics system is ready for them. llvm-svn: 226882
2015-01-23 08:01:13 +08:00
// PR22299: Ensure we can produce diagnostics for duplicate modules from -fmodule-map-file=.
//
[modules] Restrict the module use-declaration to only appear in top-level modules, and allow sub-modules of a module with a use-declaration to make use of the nominated modules. llvm-svn: 233323
2015-03-27 06:10:01 +08:00
// CHECK: diagnostics.modulemap:[[@LINE+2]]:8: error: redefinition of module 'foo'
// CHECK: diagnostics-aux.modulemap:1:8: note: previously defined here
PR22299: Relocate code for handling -fmodule-map-file= so that we don't try to produce diagnostics with source locations before the diagnostics system is ready for them. llvm-svn: 226882
2015-01-23 08:01:13 +08:00
module foo {}
[modules] Accept //-style comments in module maps on purpose rather than by accident, and accept them even when they begin '//*'. llvm-svn: 229240
2015-02-14 13:32:00 +08:00
//* Check that we accept BCPL comments properly, not just as an extension. */
[modules] Restrict the module use-declaration to only appear in top-level modules, and allow sub-modules of a module with a use-declaration to make use of the nominated modules. llvm-svn: 233323
2015-03-27 06:10:01 +08:00
module bad_use {
// CHECK: diagnostics.modulemap:[[@LINE+1]]:22: error: use declarations are only allowed in top-level modules
module submodule { use foo }
}
Support lazy stat'ing of files referenced by module maps. This patch adds support for a `header` declaration in a module map to specify certain `stat` information (currently, size and mtime) about that header file. This has two purposes: - It removes the need to eagerly `stat` every file referenced by a module map. Instead, we track a list of unresolved header files with each size / mtime (actually, for simplicity, we track submodules with such headers), and when attempting to look up a header file based on a `FileEntry`, we check if there are any unresolved header directives with that `FileEntry`'s size / mtime and perform deferred `stat`s if so. - It permits a preprocessed module to be compiled without the original files being present on disk. The only reason we used to need those files was to get the `stat` information in order to do header -> module lookups when using the module. If we're provided with the `stat` information in the preprocessed module, we can avoid requiring the files to exist. Unlike most `header` directives, if a `header` directive with `stat` information has no corresponding on-disk file the enclosing module is *not* marked unavailable (so that behavior is consistent regardless of whether we've resolved a header directive, and so that preprocessed modules don't get marked unavailable). We could actually do this for all `header` directives: the only reason we mark the module unavailable if headers are missing is to give a diagnostic slightly earlier (rather than waiting until we actually try to build the module / load and validate its .pcm file). Differential Revision: https://reviews.llvm.org/D33703 llvm-svn: 304515
2017-06-02 09:55:39 +08:00
module header_attr {
// CHECK: diagnostics.modulemap:[[@LINE+1]]:20: error: expected a header attribute name
header "foo.h" { x }
// CHECK: diagnostics.modulemap:[[@LINE+1]]:27: error: header attribute 'size' specified multiple times
header "bar.h" { size 1 size 2 }
// CHECK: diagnostics.modulemap:[[@LINE+1]]:25: error: expected integer literal as value for header attribute 'size'
header "baz.h" { size "30 kilobytes" }
header "quux.h" { size 1 mtime 2 }
header "no_attrs.h" {}
}