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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 (
"android/soong/android"
)
type CoverageProperties struct {
Native_coverage *bool
CoverageEnabled 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) begin(ctx BaseModuleContext) {}
func (cov *coverage) deps(ctx BaseModuleContext, deps Deps) Deps {
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
}
// 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")
}
return flags
}
func coverageLinkingMutator(mctx android.BottomUpMutatorContext) {
if c, ok := mctx.Module().(*Module); ok && c.coverage != nil {
var enabled bool
if !mctx.DeviceConfig().NativeCoverageEnabled() {
// Coverage is disabled globally
} else if mctx.Host() {
// TODO(dwillemsen): because of -nodefaultlibs, we must depend on libclang_rt.profile-*.a
// Just turn off for now.
} else if c.coverage.Properties.Native_coverage != nil {
enabled = *c.coverage.Properties.Native_coverage
} else {
enabled = mctx.DeviceConfig().CoverageEnabledForPath(mctx.ModuleDir())
}
if enabled {
// Create a variation so that we don't need to recompile objects
// when turning on or off coverage. We'll still relink the necessary
// binaries, since we don't know which ones those are until later.
m := mctx.CreateLocalVariations("cov")
m[0].(*Module).coverage.Properties.CoverageEnabled = true
}
}
}
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