581341d4f2
This is configured the same as make -- a global NATIVE_COVERAGE=true
flag to allow native coverage, then COVERAGE_PATHS=path1,path2,... to
turn it on for certain paths.
There are .gcnodir files exported to Make and saved in $OUT/coverage/...
files which are `ar` archives containing all of the compiler-produced
.gcno files for a particular executable / shared library.
Unlike the Make implementation, this only passes links the helper
library (automatically through --coverage) when one of the object files
or static libraries being used actually has coverage enabled.
Host support is currently disabled, since we set -nodefaultlibs, which
prevents libclang_rt.profile-*.a from being picked up automatically.
Bug: 32749731
Test: NATIVE_COVERAGE=true COVERAGE_PATHS=system/core/libcutils m -j libbacktrace libutils tombstoned
$OUT/coverage/system/lib*/libcutils.gcnodir looks correct (self)
$OUT/coverage/system/lib*/libbacktrace.gcnodir looks correct (static)
$OUT/coverage/system/lib*/libutils.gcnodir doesn't exist (shared)
$OUT/coverage/system/bin/tombstoned.gcnodir looks correct (executable)
Test: NATIVE_COVERAGE=true COVERAGE_PATHS=external/libcxxabi m -j libc++
Confirm that $OUT/coverage/system/lib*/libc++.gcnodir looks correct (whole_static_libs)
Change-Id: I48aaa0ba8d76e50e9c2d1151421c0c6dc8ed79a9
124 lines
3.5 KiB
Go
124 lines
3.5 KiB
Go
// Copyright 2017 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cc
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import (
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"android/soong/android"
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"github.com/google/blueprint"
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)
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type CoverageProperties struct {
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Native_coverage *bool
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CoverageEnabled bool `blueprint:"mutated"`
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}
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type coverage struct {
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Properties CoverageProperties
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// Whether binaries containing this module need --coverage added to their ldflags
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linkCoverage bool
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}
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func (cov *coverage) props() []interface{} {
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return []interface{}{&cov.Properties}
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}
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func (cov *coverage) begin(ctx BaseModuleContext) {}
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func (cov *coverage) deps(ctx BaseModuleContext, deps Deps) Deps {
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return deps
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}
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func (cov *coverage) flags(ctx ModuleContext, flags Flags) Flags {
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if !ctx.DeviceConfig().NativeCoverageEnabled() {
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return flags
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}
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if cov.Properties.CoverageEnabled {
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flags.Coverage = true
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flags.GlobalFlags = append(flags.GlobalFlags, "--coverage", "-O0")
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cov.linkCoverage = true
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}
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// Even if we don't have coverage enabled, if any of our object files were compiled
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// with coverage, then we need to add --coverage to our ldflags.
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if !cov.linkCoverage {
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if ctx.static() && !ctx.staticBinary() {
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// For static libraries, the only thing that changes our object files
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// are included whole static libraries, so check to see if any of
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// those have coverage enabled.
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ctx.VisitDirectDeps(func(m blueprint.Module) {
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if ctx.OtherModuleDependencyTag(m) != wholeStaticDepTag {
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return
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}
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if cc, ok := m.(*Module); ok && cc.coverage != nil {
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if cc.coverage.linkCoverage {
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cov.linkCoverage = true
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}
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}
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})
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} else {
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// For executables and shared libraries, we need to check all of
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// our static dependencies.
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ctx.VisitDirectDeps(func(m blueprint.Module) {
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cc, ok := m.(*Module)
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if !ok || cc.coverage == nil {
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return
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}
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if static, ok := cc.linker.(libraryInterface); !ok || !static.static() {
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return
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}
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if cc.coverage.linkCoverage {
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cov.linkCoverage = true
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}
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})
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}
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}
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if cov.linkCoverage {
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flags.LdFlags = append(flags.LdFlags, "--coverage")
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}
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return flags
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}
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func coverageLinkingMutator(mctx android.BottomUpMutatorContext) {
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if c, ok := mctx.Module().(*Module); ok && c.coverage != nil {
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var enabled bool
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if !mctx.DeviceConfig().NativeCoverageEnabled() {
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// Coverage is disabled globally
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} else if mctx.Host() {
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// TODO(dwillemsen): because of -nodefaultlibs, we must depend on libclang_rt.profile-*.a
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// Just turn off for now.
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} else if c.coverage.Properties.Native_coverage != nil {
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enabled = *c.coverage.Properties.Native_coverage
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} else {
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enabled = mctx.DeviceConfig().CoverageEnabledForPath(mctx.ModuleDir())
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}
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if enabled {
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// Create a variation so that we don't need to recompile objects
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// when turning on or off coverage. We'll still relink the necessary
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// binaries, since we don't know which ones those are until later.
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m := mctx.CreateLocalVariations("cov")
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m[0].(*Module).coverage.Properties.CoverageEnabled = true
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}
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}
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}
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