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Originally, the following commit removed mapping coverage regions for system
headers:
https://github.com/llvm/llvm-project/commit/93205af066341a53733046894bd75c72c99566db
It might be viable and useful to collect coverage from system headers in some
systems.
This patch adds --system-headers-coverage option (disabled by default) to enable
collecting coverage from system headers.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D143304
Files:
clang/lib/CodeGen/CoverageMappingGen.cpp
clang/test/CoverageMapping/system_macro.cpp
Index: clang/test/CoverageMapping/system_macro.cpp
===================================================================
--- clang/test/CoverageMapping/system_macro.cpp
+++ clang/test/CoverageMapping/system_macro.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -std=c++11
-fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping
-emit-llvm-only -main-file-name system_macro.cpp -o - %s | FileCheck %s
+// RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -mllvm
-system-headers-coverage -std=c++11 -fprofile-instrument=clang
-fcoverage-mapping -dump-coverage-mapping -emit-llvm-only -main-file-name
system_macro.cpp -o - %s | FileCheck %s
#ifdef IS_SYSHEADER
@@ -13,8 +13,9 @@
// CHECK-LABEL: doSomething
void doSomething(int x) { // CHECK: File 0, [[@LINE]]:25 -> {{[0-9:]+}} = #0
- Func(x);
+ Func(x); // CHECK: Expansion,File 0, [[@LINE]]:3 -> [[@LINE]]:7
return;
+ // CHECK: Expansion,File 0, [[@LINE+1]]:3 -> [[@LINE+1]]:11
SomeType *f; // CHECK: File 0, [[@LINE]]:11 -> {{[0-9:]+}} = 0
}
Index: clang/lib/CodeGen/CoverageMappingGen.cpp
===================================================================
--- clang/lib/CodeGen/CoverageMappingGen.cpp
+++ clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -37,6 +37,11 @@
"disable it on test)"),
llvm::cl::init(true), llvm::cl::Hidden);
+static llvm::cl::opt<bool> SystemHeadersCoverage(
+ "system-headers-coverage",
+ llvm::cl::desc("Enable collecting coverage from system headers"),
+ llvm::cl::init(false), llvm::cl::Hidden);
+
using namespace clang;
using namespace CodeGen;
using namespace llvm::coverage;
@@ -301,8 +306,9 @@
if (!Visited.insert(File).second)
continue;
- // Do not map FileID's associated with system headers.
- if (SM.isInSystemHeader(SM.getSpellingLoc(Loc)))
+ // Do not map FileID's associated with system headers unless collecting
+ // coverage from system headers is explicitly enabled.
+ if (!SystemHeadersCoverage &&
SM.isInSystemHeader(SM.getSpellingLoc(Loc)))
continue;
unsigned Depth = 0;
@@ -416,8 +422,10 @@
SourceLocation LocStart = Region.getBeginLoc();
assert(SM.getFileID(LocStart).isValid() && "region in invalid file");
- // Ignore regions from system headers.
- if (SM.isInSystemHeader(SM.getSpellingLoc(LocStart)))
+ // Ignore regions from system headers unless collecting coverage from
+ // system headers is explicitly enabled.
+ if (!SystemHeadersCoverage &&
+ SM.isInSystemHeader(SM.getSpellingLoc(LocStart)))
continue;
auto CovFileID = getCoverageFileID(LocStart);
@@ -1000,8 +1008,10 @@
void VisitDecl(const Decl *D) {
Stmt *Body = D->getBody();
- // Do not propagate region counts into system headers.
- if (Body && SM.isInSystemHeader(SM.getSpellingLoc(getStart(Body))))
+ // Do not propagate region counts into system headers unless collecting
+ // coverage from system headers is explicitly enabled.
+ if (!SystemHeadersCoverage && Body &&
+ SM.isInSystemHeader(SM.getSpellingLoc(getStart(Body))))
return;
// Do not visit the artificial children nodes of defaulted methods. The
Index: clang/test/CoverageMapping/system_macro.cpp
===================================================================
--- clang/test/CoverageMapping/system_macro.cpp
+++ clang/test/CoverageMapping/system_macro.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -std=c++11 -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only -main-file-name system_macro.cpp -o - %s | FileCheck %s
+// RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -mllvm -system-headers-coverage -std=c++11 -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only -main-file-name system_macro.cpp -o - %s | FileCheck %s
#ifdef IS_SYSHEADER
@@ -13,8 +13,9 @@
// CHECK-LABEL: doSomething
void doSomething(int x) { // CHECK: File 0, [[@LINE]]:25 -> {{[0-9:]+}} = #0
- Func(x);
+ Func(x); // CHECK: Expansion,File 0, [[@LINE]]:3 -> [[@LINE]]:7
return;
+ // CHECK: Expansion,File 0, [[@LINE+1]]:3 -> [[@LINE+1]]:11
SomeType *f; // CHECK: File 0, [[@LINE]]:11 -> {{[0-9:]+}} = 0
}
Index: clang/lib/CodeGen/CoverageMappingGen.cpp
===================================================================
--- clang/lib/CodeGen/CoverageMappingGen.cpp
+++ clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -37,6 +37,11 @@
"disable it on test)"),
llvm::cl::init(true), llvm::cl::Hidden);
+static llvm::cl::opt<bool> SystemHeadersCoverage(
+ "system-headers-coverage",
+ llvm::cl::desc("Enable collecting coverage from system headers"),
+ llvm::cl::init(false), llvm::cl::Hidden);
+
using namespace clang;
using namespace CodeGen;
using namespace llvm::coverage;
@@ -301,8 +306,9 @@
if (!Visited.insert(File).second)
continue;
- // Do not map FileID's associated with system headers.
- if (SM.isInSystemHeader(SM.getSpellingLoc(Loc)))
+ // Do not map FileID's associated with system headers unless collecting
+ // coverage from system headers is explicitly enabled.
+ if (!SystemHeadersCoverage && SM.isInSystemHeader(SM.getSpellingLoc(Loc)))
continue;
unsigned Depth = 0;
@@ -416,8 +422,10 @@
SourceLocation LocStart = Region.getBeginLoc();
assert(SM.getFileID(LocStart).isValid() && "region in invalid file");
- // Ignore regions from system headers.
- if (SM.isInSystemHeader(SM.getSpellingLoc(LocStart)))
+ // Ignore regions from system headers unless collecting coverage from
+ // system headers is explicitly enabled.
+ if (!SystemHeadersCoverage &&
+ SM.isInSystemHeader(SM.getSpellingLoc(LocStart)))
continue;
auto CovFileID = getCoverageFileID(LocStart);
@@ -1000,8 +1008,10 @@
void VisitDecl(const Decl *D) {
Stmt *Body = D->getBody();
- // Do not propagate region counts into system headers.
- if (Body && SM.isInSystemHeader(SM.getSpellingLoc(getStart(Body))))
+ // Do not propagate region counts into system headers unless collecting
+ // coverage from system headers is explicitly enabled.
+ if (!SystemHeadersCoverage && Body &&
+ SM.isInSystemHeader(SM.getSpellingLoc(getStart(Body))))
return;
// Do not visit the artificial children nodes of defaulted methods. The
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