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// Copyright 2017 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cc
import (
"strconv"
"github.com/google/blueprint"
"android/soong/android"
)
const profileInstrFlag = "-fprofile-instr-generate=/data/misc/trace/clang-%p-%m.profraw"
type CoverageProperties struct {
Native_coverage *bool
NeedCoverageVariant bool `blueprint:"mutated"`
NeedCoverageBuild bool `blueprint:"mutated"`
CoverageEnabled bool `blueprint:"mutated"`
IsCoverageVariant bool `blueprint:"mutated"`
}
type coverage struct {
Properties CoverageProperties
// Whether binaries containing this module need --coverage added to their ldflags
linkCoverage bool
}
func (cov *coverage) props() []interface{} {
return []interface{}{&cov.Properties}
}
func getGcovProfileLibraryName(ctx ModuleContextIntf) string {
// This function should only ever be called for a cc.Module, so the
// following statement should always succeed.
// LINT.IfChange
if ctx.useSdk() {
return "libprofile-extras_ndk"
} else {
return "libprofile-extras"
}
}
func getClangProfileLibraryName(ctx ModuleContextIntf) string {
if ctx.useSdk() {
return "libprofile-clang-extras_ndk"
} else if ctx.isCfiAssemblySupportEnabled() {
return "libprofile-clang-extras_cfi_support"
} else {
return "libprofile-clang-extras"
}
// LINT.ThenChange(library.go)
}
func (cov *coverage) deps(ctx DepsContext, deps Deps) Deps {
if cov.Properties.NeedCoverageVariant {
ctx.AddVariationDependencies([]blueprint.Variation{
{Mutator: "link", Variation: "static"},
}, CoverageDepTag, getGcovProfileLibraryName(ctx))
ctx.AddVariationDependencies([]blueprint.Variation{
{Mutator: "link", Variation: "static"},
}, CoverageDepTag, getClangProfileLibraryName(ctx))
}
return deps
}
func EnableContinuousCoverage(ctx android.BaseModuleContext) bool {
return ctx.DeviceConfig().ClangCoverageContinuousMode()
}
func (cov *coverage) flags(ctx ModuleContext, flags Flags, deps PathDeps) (Flags, PathDeps) {
clangCoverage := ctx.DeviceConfig().ClangCoverageEnabled()
gcovCoverage := ctx.DeviceConfig().GcovCoverageEnabled()
if !gcovCoverage && !clangCoverage {
return flags, deps
}
if cov.Properties.CoverageEnabled {
cov.linkCoverage = true
if gcovCoverage {
flags.GcovCoverage = true
flags.Local.CommonFlags = append(flags.Local.CommonFlags, "--coverage", "-O0")
// Override -Wframe-larger-than and non-default optimization
// flags that the module may use.
flags.Local.CFlags = append(flags.Local.CFlags, "-Wno-frame-larger-than=", "-O0")
} else if clangCoverage {
flags.Local.CommonFlags = append(flags.Local.CommonFlags, profileInstrFlag,
"-fcoverage-mapping", "-Wno-pass-failed", "-D__ANDROID_CLANG_COVERAGE__")
// Override -Wframe-larger-than. We can expect frame size increase after
// coverage instrumentation.
flags.Local.CFlags = append(flags.Local.CFlags, "-Wno-frame-larger-than=")
if EnableContinuousCoverage(ctx) {
flags.Local.CommonFlags = append(flags.Local.CommonFlags, "-mllvm", "-runtime-counter-relocation")
}
// http://b/248022906, http://b/247941801 enabling coverage and hwasan-globals
// instrumentation together causes duplicate-symbol errors for __llvm_profile_filename.
if c, ok := ctx.Module().(*Module); ok && c.sanitize.isSanitizerEnabled(Hwasan) {
flags.Local.CommonFlags = append(flags.Local.CommonFlags, "-mllvm", "-hwasan-globals=0")
}
}
}
// Even if we don't have coverage enabled, if any of our object files were compiled
// with coverage, then we need to add --coverage to our ldflags.
if !cov.linkCoverage {
if ctx.static() && !ctx.staticBinary() {
// For static libraries, the only thing that changes our object files
// are included whole static libraries, so check to see if any of
// those have coverage enabled.
ctx.VisitDirectDeps(func(m android.Module) {
if depTag, ok := ctx.OtherModuleDependencyTag(m).(libraryDependencyTag); ok {
if depTag.static() && depTag.wholeStatic {
if cc, ok := m.(*Module); ok && cc.coverage != nil {
if cc.coverage.linkCoverage {
cov.linkCoverage = true
}
}
}
}
})
} else {
// For executables and shared libraries, we need to check all of
// our static dependencies.
ctx.VisitDirectDeps(func(m android.Module) {
cc, ok := m.(*Module)
if !ok || cc.coverage == nil {
return
}
if static, ok := cc.linker.(libraryInterface); !ok || !static.static() {
return
}
if cc.coverage.linkCoverage {
cov.linkCoverage = true
}
})
}
}
if cov.linkCoverage {
if gcovCoverage {
flags.Local.LdFlags = append(flags.Local.LdFlags, "--coverage")
coverage := ctx.GetDirectDepWithTag(getGcovProfileLibraryName(ctx), CoverageDepTag).(*Module)
deps.WholeStaticLibs = append(deps.WholeStaticLibs, coverage.OutputFile().Path())
flags.Local.LdFlags = append(flags.Local.LdFlags, "-Wl,--wrap,getenv")
} else if clangCoverage {
flags.Local.LdFlags = append(flags.Local.LdFlags, profileInstrFlag)
if EnableContinuousCoverage(ctx) {
flags.Local.LdFlags = append(flags.Local.LdFlags, "-Wl,-mllvm=-runtime-counter-relocation")
}
coverage := ctx.GetDirectDepWithTag(getClangProfileLibraryName(ctx), CoverageDepTag).(*Module)
deps.WholeStaticLibs = append(deps.WholeStaticLibs, coverage.OutputFile().Path())
flags.Local.LdFlags = append(flags.Local.LdFlags, "-Wl,--wrap,open")
}
}
return flags, deps
}
func (cov *coverage) begin(ctx BaseModuleContext) {
if ctx.Host() {
// TODO(dwillemsen): because of -nodefaultlibs, we must depend on libclang_rt.profile-*.a
// Just turn off for now.
} else {
cov.Properties = SetCoverageProperties(ctx, cov.Properties, ctx.nativeCoverage(), ctx.useSdk(), ctx.sdkVersion())
}
}
func SetCoverageProperties(ctx android.BaseModuleContext, properties CoverageProperties, moduleTypeHasCoverage bool,
useSdk bool, sdkVersion string) CoverageProperties {
// Coverage is disabled globally
if !ctx.DeviceConfig().NativeCoverageEnabled() {
return properties
}
var needCoverageVariant bool
var needCoverageBuild bool
if moduleTypeHasCoverage {
// Check if Native_coverage is set to false. This property defaults to true.
needCoverageVariant = BoolDefault(properties.Native_coverage, true)
if useSdk && sdkVersion != "current" {
// Native coverage is not supported for SDK versions < 23
if fromApi, err := strconv.Atoi(sdkVersion); err == nil && fromApi < 23 {
needCoverageVariant = false
}
}
if needCoverageVariant {
// Coverage variant is actually built with coverage if enabled for its module path
needCoverageBuild = ctx.DeviceConfig().NativeCoverageEnabledForPath(ctx.ModuleDir())
}
}
properties.NeedCoverageBuild = needCoverageBuild
properties.NeedCoverageVariant = needCoverageVariant
return properties
}
type UseCoverage interface {
android.Module
IsNativeCoverageNeeded(ctx android.BaseModuleContext) bool
}
// Coverage is an interface for non-CC modules to implement to be mutated for coverage
type Coverage interface {
UseCoverage
SetPreventInstall()
HideFromMake()
MarkAsCoverageVariant(bool)
EnableCoverageIfNeeded()
}
func coverageMutator(mctx android.BottomUpMutatorContext) {
if c, ok := mctx.Module().(*Module); ok && c.coverage != nil {
needCoverageVariant := c.coverage.Properties.NeedCoverageVariant
needCoverageBuild := c.coverage.Properties.NeedCoverageBuild
if needCoverageVariant {
m := mctx.CreateVariations("", "cov")
// Setup the non-coverage version and set HideFromMake and
// PreventInstall to true.
m[0].(*Module).coverage.Properties.CoverageEnabled = false
m[0].(*Module).coverage.Properties.IsCoverageVariant = false
m[0].(*Module).Properties.HideFromMake = true
m[0].(*Module).Properties.PreventInstall = true
// The coverage-enabled version inherits HideFromMake,
// PreventInstall from the original module.
m[1].(*Module).coverage.Properties.CoverageEnabled = needCoverageBuild
m[1].(*Module).coverage.Properties.IsCoverageVariant = true
}
} else if cov, ok := mctx.Module().(Coverage); ok && cov.IsNativeCoverageNeeded(mctx) {
// APEX and Rust modules fall here
// Note: variant "" is also created because an APEX can be depended on by another
// module which are split into "" and "cov" variants. e.g. when cc_test refers
// to an APEX via 'data' property.
m := mctx.CreateVariations("", "cov")
m[0].(Coverage).MarkAsCoverageVariant(false)
m[0].(Coverage).SetPreventInstall()
m[0].(Coverage).HideFromMake()
m[1].(Coverage).MarkAsCoverageVariant(true)
m[1].(Coverage).EnableCoverageIfNeeded()
} else if cov, ok := mctx.Module().(UseCoverage); ok && cov.IsNativeCoverageNeeded(mctx) {
// Module itself doesn't have to have "cov" variant, but it should use "cov" variants of
// deps.
mctx.CreateVariations("cov")
mctx.AliasVariation("cov")
}
}
func parseSymbolFileForAPICoverage(ctx ModuleContext, symbolFile string) android.ModuleOutPath {
apiLevelsJson := android.GetApiLevelsJson(ctx)
symbolFilePath := android.PathForModuleSrc(ctx, symbolFile)
outputFile := ctx.baseModuleName() + ".xml"
parsedApiCoveragePath := android.PathForModuleOut(ctx, outputFile)
rule := android.NewRuleBuilder(pctx, ctx)
rule.Command().
BuiltTool("ndk_api_coverage_parser").
Input(symbolFilePath).
Output(parsedApiCoveragePath).
Implicit(apiLevelsJson).
FlagWithArg("--api-map ", apiLevelsJson.String())
rule.Build("native_library_api_list", "Generate native API list based on symbol files for coverage measurement")
return parsedApiCoveragePath
}