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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"
"android/soong/android"
)
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 (cov *coverage) deps(ctx BaseModuleContext, deps Deps) Deps {
if cov.Properties.NeedCoverageBuild {
// Link libprofile-extras/libprofile-extras_ndk when coverage
// variant is required. This is a no-op unless coverage is
// actually enabled during linking, when
// '-uinit_profile_extras' is added (in flags()) to force the
// setup code in libprofile-extras be linked into the
// binary/library.
//
// We cannot narrow it further to only the 'cov' variant since
// the mutator hasn't run (and we don't have the 'cov' variant
// yet).
if !ctx.useSdk() {
deps.LateStaticLibs = append(deps.LateStaticLibs, "libprofile-extras")
} else {
deps.LateStaticLibs = append(deps.LateStaticLibs, "libprofile-extras_ndk")
}
}
return deps
}
func (cov *coverage) flags(ctx ModuleContext, flags Flags) Flags {
if !ctx.DeviceConfig().NativeCoverageEnabled() {
return flags
}
if cov.Properties.CoverageEnabled {
flags.Coverage = true
flags.GlobalFlags = append(flags.GlobalFlags, "--coverage", "-O0")
cov.linkCoverage = true
// Override -Wframe-larger-than and non-default optimization
// flags that the module may use.
flags.CFlags = append(flags.CFlags, "-Wno-frame-larger-than=", "-O0")
}
// 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.VisitDirectDepsWithTag(wholeStaticDepTag, func(m android.Module) {
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 {
flags.LdFlags = append(flags.LdFlags, "--coverage")
// Force linking of constructor/setup code in libprofile-extras
flags.LdFlags = append(flags.LdFlags, "-uinit_profile_extras")
}
return flags
}
func (cov *coverage) begin(ctx BaseModuleContext) {
// Coverage is disabled globally
if !ctx.DeviceConfig().NativeCoverageEnabled() {
return
}
var needCoverageVariant bool
var needCoverageBuild bool
if ctx.Host() {
// TODO(dwillemsen): because of -nodefaultlibs, we must depend on libclang_rt.profile-*.a
// Just turn off for now.
} else if !ctx.nativeCoverage() {
// Native coverage is not supported for this module type.
} else {
// Check if Native_coverage is set to false. This property defaults to true.
needCoverageVariant = BoolDefault(cov.Properties.Native_coverage, true)
if sdk_version := ctx.sdkVersion(); ctx.useSdk() && sdk_version != "current" {
// Native coverage is not supported for SDK versions < 23
if fromApi, err := strconv.Atoi(sdk_version); err == nil && fromApi < 23 {
needCoverageVariant = false
}
}
if needCoverageVariant {
// Coverage variant is actually built with coverage if enabled for its module path
needCoverageBuild = ctx.DeviceConfig().CoverageEnabledForPath(ctx.ModuleDir())
}
}
cov.Properties.NeedCoverageBuild = needCoverageBuild
cov.Properties.NeedCoverageVariant = needCoverageVariant
}
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
}
}
}
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