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[clang][deps] Add module map describing compiled module to file dependencies. #160226

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[clang][deps] Add module map describing compiled module to file dependencies. #160226

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46288ff
[clang][deps] Add module map describing compiled module to file depen…
vsapsai Sep 23, 2025
377a157
Merge branch 'main' into add-extra-modulemap-to-file-dependencies
vsapsai Oct 6, 2025
3902244
Address PR comments: move module map dependency reporting to `ModuleD…
vsapsai Oct 6, 2025
f2e0215
Add a test case showing that `FileEntryRef::getName` doesn't work som…
vsapsai Oct 8, 2025
e0643f7
Switch `getName` to `getNameAsRequested`.
vsapsai Oct 8, 2025
b9928d7
Attempt to handle back slashes on Windows.
vsapsai Oct 8, 2025
8af54e0
Merge branch 'main' into add-extra-modulemap-to-file-dependencies
vsapsai Oct 8, 2025
7cd357d
Merge branch 'main' into add-extra-modulemap-to-file-dependencies
vsapsai Oct 8, 2025
bbfebe5
Try a different approach to handle backslash.
vsapsai Oct 8, 2025
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7 changes: 7 additions & 0 deletions clang/lib/Tooling/DependencyScanning/ModuleDepCollector.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -685,6 +685,13 @@ void ModuleDepCollectorPP::EndOfMainFile() {
if (!MDC.ScanInstance.getPreprocessorOpts().ImplicitPCHInclude.empty())
MDC.addFileDep(MDC.ScanInstance.getPreprocessorOpts().ImplicitPCHInclude);

if (Module *CurrentModule = PP.getCurrentModuleImplementation()) {
if (OptionalFileEntryRef CurrentModuleMap =
PP.getHeaderSearchInfo().getModuleMap().getModuleMapFileForUniquing(
CurrentModule))
MDC.addFileDep(CurrentModuleMap->getNameAsRequested());
}

for (const Module *M :
MDC.ScanInstance.getPreprocessor().getAffectingClangModules())
if (!MDC.isPrebuiltModule(M))
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55 changes: 55 additions & 0 deletions clang/test/ClangScanDeps/modules-current-modulemap-file-dep.c
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@@ -0,0 +1,55 @@
// RUN: rm -rf %t
// RUN: split-file %s %t

// RUN: sed -e "s|DIR|%/t|g" %t/vfs.yaml.in > %t/vfs.yaml

// RUN: clang-scan-deps -format experimental-full -j 1 -- \
// RUN: %clang -ivfsoverlay %t/vfs.yaml -fmodules -fimplicit-module-maps \
// RUN: -fmodules-cache-path=%t/cache -fmodule-name=ModuleName \
// RUN: -I %/t/remapped -c %t/header-impl.c -o %t/header-impl.o \
// RUN: | sed 's:\\\\\?:/:g' | FileCheck %s -DPREFIX=%/t

// CHECK: "command-line": [
// CHECK: "-fmodule-map-file=[[PREFIX]]/remapped/module.modulemap"
// CHECK: "file-deps": [
// CHECK: "[[PREFIX]]/remapped/module.modulemap"

//--- vfs.yaml.in
{
"version": 0,
"case-sensitive": "false",
"roots": [
{
"name": "DIR/remapped",
"type": "directory",
"contents": [
{
"name": "module.modulemap",
"type": "file",
"external-contents": "DIR/original/module.modulemap"
},
{
"name": "header.h",
"type": "file",
"external-contents": "DIR/original/header.h"
}
]
}
]
}

//--- original/module.modulemap
module ModuleName {
header "header.h"
export *
}

//--- original/header.h
int foo_function(void);

//--- header-impl.c
#include <header.h>

int foo_function(void) {
return 0;
}
3 changes: 2 additions & 1 deletion clang/test/ClangScanDeps/modules-fmodule-name-no-module-built.m
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Expand Up @@ -46,7 +46,8 @@
// CHECK: "file-deps": [
// CHECK-NEXT: "[[PREFIX]]/modules-fmodule-name-no-module-built.m",
// CHECK-NEXT: "[[PREFIX]]/Inputs/header3.h",
// CHECK-NEXT: "[[PREFIX]]/Inputs/header.h"
// CHECK-NEXT: "[[PREFIX]]/Inputs/header.h",
// CHECK-NEXT: "[[PREFIX]]/Inputs/module.modulemap"
// CHECK-NEXT: ],
// CHECK-NEXT: "input-file": "[[PREFIX]]/modules-fmodule-name-no-module-built.m"
// CHECK-NEXT: }
3 changes: 2 additions & 1 deletion clang/test/ClangScanDeps/modules-header-sharing.m
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Expand Up @@ -79,7 +79,8 @@
// CHECK: ],
// CHECK: "file-deps": [
// CHECK-NEXT: "[[PREFIX]]/tu.m",
// CHECK-NEXT: "[[PREFIX]]/shared/H.h"
// CHECK-NEXT: "[[PREFIX]]/shared/H.h",
// CHECK-NEXT: "[[PREFIX]]/frameworks/A.framework/Modules/module.modulemap"
// CHECK-NEXT: ],
// CHECK-NEXT: "input-file": "[[PREFIX]]/tu.m"
// CHECK-NEXT: }
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3 changes: 2 additions & 1 deletion clang/test/ClangScanDeps/modules-implementation-module-map.c
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Expand Up @@ -28,7 +28,8 @@ framework module FWPrivate { header "private.h" }
// CHECK: "-fmodule-name=FWPrivate",
// CHECK: ],
// CHECK: "file-deps": [
// CHECK-NEXT: "[[PREFIX]]/tu.m"
// CHECK-NEXT: "[[PREFIX]]/tu.m",
// CHECK-NEXT: "[[PREFIX]]/frameworks/FW.framework/Modules/module.private.modulemap"
// CHECK-NEXT: ],
// CHECK-NEXT: "input-file": "[[PREFIX]]/tu.m"
// CHECK-NEXT: }
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3 changes: 2 additions & 1 deletion clang/test/ClangScanDeps/modules-implementation-private.m
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Expand Up @@ -65,7 +65,8 @@
// CHECK: "file-deps": [
// CHECK-NEXT: "[[PREFIX]]/tu.m",
// CHECK-NEXT: "[[PREFIX]]/frameworks/FW.framework/PrivateHeaders/Missed.h",
// CHECK-NEXT: "[[PREFIX]]/frameworks/FW.framework/Headers/FW.h"
// CHECK-NEXT: "[[PREFIX]]/frameworks/FW.framework/Headers/FW.h",
// CHECK-NEXT: "[[PREFIX]]/frameworks/FW.framework/Modules/module.modulemap"
// CHECK-NEXT: ],
// CHECK-NEXT: "input-file": "[[PREFIX]]/tu.m"
// CHECK-NEXT: }
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