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Ivan Lozanoa0cd8f92020-04-09 09:56:02 -04001// Copyright 2020 The Android Open Source Project
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package rust
16
17import (
18 "github.com/google/blueprint"
19
20 "android/soong/cc"
21)
22
Joel Galensonfa049382021-01-14 16:03:18 -080023var CovLibraryName = "libprofile-clang-extras"
24
25const profileInstrFlag = "-fprofile-instr-generate=/data/misc/trace/clang-%p-%m.profraw"
Ivan Lozanoa0cd8f92020-04-09 09:56:02 -040026
27type coverage struct {
28 Properties cc.CoverageProperties
29
30 // Whether binaries containing this module need --coverage added to their ldflags
31 linkCoverage bool
32}
33
34func (cov *coverage) props() []interface{} {
35 return []interface{}{&cov.Properties}
36}
37
38func (cov *coverage) deps(ctx DepsContext, deps Deps) Deps {
39 if cov.Properties.NeedCoverageVariant {
40 ctx.AddVariationDependencies([]blueprint.Variation{
41 {Mutator: "link", Variation: "static"},
42 }, cc.CoverageDepTag, CovLibraryName)
43 }
44
45 return deps
46}
47
48func (cov *coverage) flags(ctx ModuleContext, flags Flags, deps PathDeps) (Flags, PathDeps) {
49
Colin Cross1a6acd42020-06-16 17:51:46 -070050 if !ctx.DeviceConfig().NativeCoverageEnabled() {
Ivan Lozanoa0cd8f92020-04-09 09:56:02 -040051 return flags, deps
52 }
53
54 if cov.Properties.CoverageEnabled {
55 flags.Coverage = true
56 coverage := ctx.GetDirectDepWithTag(CovLibraryName, cc.CoverageDepTag).(cc.LinkableInterface)
57 flags.RustFlags = append(flags.RustFlags,
Pirama Arumuga Nainarb13e8ac2021-07-15 10:10:29 -070058 "-Z instrument-coverage", "-g")
Ivan Lozanoa0cd8f92020-04-09 09:56:02 -040059 flags.LinkFlags = append(flags.LinkFlags,
Pirama Arumuga Nainar1799f9d2021-09-10 09:29:38 -070060 profileInstrFlag, "-g", coverage.OutputFile().Path().String(), "-Wl,--wrap,open",
61 // Upstream LLVM change 6d2d3bd0a6 made
62 // -z,start-stop-gc the default. It drops metadata
63 // sections like __llvm_prf_data unless they are marked
64 // SHF_GNU_RETAIN. https://reviews.llvm.org/D97448
65 // marks generated sections, including __llvm_prf_data
66 // as SHF_GNU_RETAIN. However this change is not in
67 // the Rust toolchain. Since we link Rust libs with
68 // new lld, we should use nostart-stop-gc until the
69 // Rust toolchain updates past D97448.
70 "-Wl,-z,nostart-stop-gc",
71 )
Ivan Lozanoa0cd8f92020-04-09 09:56:02 -040072 deps.StaticLibs = append(deps.StaticLibs, coverage.OutputFile().Path())
73 }
74
75 return flags, deps
76}
77
78func (cov *coverage) begin(ctx BaseModuleContext) {
79 if ctx.Host() {
80 // Host coverage not yet supported.
81 } else {
82 // Update useSdk and sdkVersion args if Rust modules become SDK aware.
ThiƩbaud Weksteen1f7f70f2020-06-24 11:32:48 +020083 cov.Properties = cc.SetCoverageProperties(ctx, cov.Properties, ctx.RustModule().nativeCoverage(), false, "")
Ivan Lozanoa0cd8f92020-04-09 09:56:02 -040084 }
85}