rust: Fix coverage in no-std crates
Coverage builds for no_std crates currently fail because
profiler_builtins are part of libstd and therefore do not get included.
When calculating the dependencies for coverage enabled targets, check if
the stdlib is being included, and if it is not then pull the
profiler_builtins sysroot.
Bug: 249551848
Test: CLANG_COVERAGE=true NATIVE_COVERAGE_PATHS='*' make libtinyvec_nostd.rlib-std
Change-Id: I73f89bddcb2d4d9c704cb3962ee39b73888c7f3f
diff --git a/rust/compiler.go b/rust/compiler.go
index 8ec42f0..31acd49 100644
--- a/rust/compiler.go
+++ b/rust/compiler.go
@@ -208,6 +208,10 @@
panic("baseCompiler does not implement SetDisabled()")
}
+func (compiler *baseCompiler) noStdlibs() bool {
+ return Bool(compiler.Properties.No_stdlibs)
+}
+
func (compiler *baseCompiler) coverageOutputZipPath() android.OptionalPath {
panic("baseCompiler does not implement coverageOutputZipPath()")
}
diff --git a/rust/coverage.go b/rust/coverage.go
index 5ea481f..bc6504d 100644
--- a/rust/coverage.go
+++ b/rust/coverage.go
@@ -21,6 +21,7 @@
)
var CovLibraryName = "libprofile-clang-extras"
+var ProfilerBuiltins = "libprofiler_builtins.rust_sysroot"
// Add '%c' to default specifier after we resolve http://b/210012154
const profileInstrFlag = "-fprofile-instr-generate=/data/misc/trace/clang-%p-%m.profraw"
@@ -41,6 +42,11 @@
ctx.AddVariationDependencies([]blueprint.Variation{
{Mutator: "link", Variation: "static"},
}, cc.CoverageDepTag, CovLibraryName)
+
+ // no_std modules are missing libprofiler_builtins which provides coverage, so we need to add it as a dependency.
+ if rustModule, ok := ctx.Module().(*Module); ok && rustModule.compiler.noStdlibs() {
+ ctx.AddVariationDependencies([]blueprint.Variation{{Mutator: "rust_libraries", Variation: "rlib"}}, rlibDepTag, ProfilerBuiltins)
+ }
}
return deps
@@ -60,6 +66,13 @@
flags.LinkFlags = append(flags.LinkFlags,
profileInstrFlag, "-g", coverage.OutputFile().Path().String(), "-Wl,--wrap,open")
deps.StaticLibs = append(deps.StaticLibs, coverage.OutputFile().Path())
+
+ // no_std modules are missing libprofiler_builtins which provides coverage, so we need to add it as a dependency.
+ if rustModule, ok := ctx.Module().(*Module); ok && rustModule.compiler.noStdlibs() {
+ profiler_builtins := ctx.GetDirectDepWithTag(ProfilerBuiltins, rlibDepTag).(*Module)
+ deps.RLibs = append(deps.RLibs, RustLibrary{Path: profiler_builtins.OutputFile().Path(), CrateName: profiler_builtins.CrateName()})
+ }
+
if cc.EnableContinuousCoverage(ctx) {
flags.RustFlags = append(flags.RustFlags, "-C llvm-args=--runtime-counter-relocation")
flags.LinkFlags = append(flags.LinkFlags, "-Wl,-mllvm,-runtime-counter-relocation")
diff --git a/rust/rust.go b/rust/rust.go
index 67e0d7c..e4cf671 100644
--- a/rust/rust.go
+++ b/rust/rust.go
@@ -490,6 +490,7 @@
SetDisabled()
stdLinkage(ctx *depsContext) RustLinkage
+ noStdlibs() bool
unstrippedOutputFilePath() android.Path
strippedOutputFilePath() android.OptionalPath
