tequilaOS/platform_build_soong
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Error on suboptimal system server classpath order, unless explicitly allowed.

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The order is non-optimal if some jar X precedes its dependency Y. In
that case dexpreopt will be unable to resolve any rerefences from X to
Y. Raise an error unless the product sets variable
PRODUCT_BROKEN_SUBOPTIMAL_ORDER_OF_SYSTEM_SERVER_JARS to true in the
makefile. This is to prevent regressions in existing products that
currently have correct order.

Test: lunch cf_x86_phone-userdebug && m nothing
Test: lunch aosp_car_arm && m nothing

Bug: 140451054

Change-Id: Iafe8fe0e992deb628e38f2321d4601a4804a3c79
Merged-In: Iafe8fe0e992deb628e38f2321d4601a4804a3c79
(cherry picked from commit fb863c87c4)
This commit is contained in:
Ulya Trafimovich 2020-03-27 11:30:00 +00:00
parent 039b04f4fc
commit cd3203fd5d
2 changed files with 27 additions and 0 deletions
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2
dexpreopt/config.go
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@ -50,6 +50,8 @@ type GlobalConfig struct {
UpdatableSystemServerJars []string // jars within apex that are loaded into system server
SpeedApps []string // apps that should be speed optimized
BrokenSuboptimalOrderOfSystemServerJars bool // if true, sub-optimal order does not cause a build error
PreoptFlags []string // global dex2oat flags that should be used if no module-specific dex2oat flags are specified
DefaultCompilerFilter string // default compiler filter to pass to dex2oat, overridden by --compiler-filter= in module-specific dex2oat flags

25
dexpreopt/dexpreopt.go
View file

@ -307,6 +307,8 @@ func dexpreoptCommand(ctx android.PathContext, globalSoong *GlobalSoongConfig, g
dexPathHost := SystemServerDexJarHostPath(ctx, module.Name)
rule.Command().Text("mkdir -p").Flag(filepath.Dir(dexPathHost.String()))
rule.Command().Text("cp -f").Input(module.DexPath).Output(dexPathHost)
checkSystemServerOrder(ctx, jarIndex)
} else {
// Pass special class loader context to skip the classpath and collision check.
// This will get removed once LOCAL_USES_LIBRARIES is enforced.
@ -606,6 +608,29 @@ func SystemServerDexJarHostPath(ctx android.PathContext, jar string) android.Out
}
}
// Check the order of jars on the system server classpath and give a warning/error if a jar precedes
// one of its dependencies. This is not an error, but a missed optimization, as dexpreopt won't
// have the dependency jar in the class loader context, and it won't be able to resolve any
// references to its classes and methods.
func checkSystemServerOrder(ctx android.PathContext, jarIndex int) {
mctx, isModule := ctx.(android.ModuleContext)
if isModule {
config := GetGlobalConfig(ctx)
jars := NonUpdatableSystemServerJars(ctx, config)
mctx.WalkDeps(func(dep android.Module, parent android.Module) bool {
depIndex := android.IndexList(dep.Name(), jars)
if jarIndex < depIndex && !config.BrokenSuboptimalOrderOfSystemServerJars {
jar := jars[jarIndex]
dep := jars[depIndex]
mctx.ModuleErrorf("non-optimal order of jars on the system server classpath:"+
" '%s' precedes its dependency '%s', so dexpreopt is unable to resolve any"+
" references from '%s' to '%s'.\n", jar, dep, jar, dep)
}
return true
})
}
}
func contains(l []string, s string) bool {
for _, e := range l {
if e == s {