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Allow Linux hosts to use ubsan runtime sanitizers.

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Linux host prebuilts for UBSan runtime are available now, so we can
enable these. There's a bit more work to be done for Windows/Darwin
support, so that's left to another CL.

Bug: 148289941
Test: Build host binary with integer overflow sanitization enabled.
Test: ./art/test/testrunner/run_build_test_target.py art-linux-bionic-x64

Change-Id: Ie98979116fa3bb8accb23d1788adcc28330a9530
This commit is contained in:
Ivan Lozano 2020-02-19 15:24:02 -05:00
parent ae83ce656d
commit 9ac32c7674
2 changed files with 42 additions and 12 deletions
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2
cc/config/x86_linux_host.go
View file

@ -234,7 +234,7 @@ func (t *toolchainLinuxX8664) YasmFlags() string {
}
func (toolchainLinuxX86) LibclangRuntimeLibraryArch() string {
return "i686"
return "i386"
}
func (toolchainLinuxX8664) LibclangRuntimeLibraryArch() string {

52
cc/sanitize.go
View file

@ -179,6 +179,7 @@ type SanitizeProperties struct {
SanitizerEnabled bool `blueprint:"mutated"`
SanitizeDep bool `blueprint:"mutated"`
MinimalRuntimeDep bool `blueprint:"mutated"`
BuiltinsDep bool `blueprint:"mutated"`
UbsanRuntimeDep bool `blueprint:"mutated"`
InSanitizerDir bool `blueprint:"mutated"`
Sanitizers []string `blueprint:"mutated"`
@ -334,8 +335,8 @@ func (sanitize *sanitize) begin(ctx BaseModuleContext) {
s.Diag.Cfi = nil
}
// Disable sanitizers that depend on the UBSan runtime for host builds.
if ctx.Host() {
// Disable sanitizers that depend on the UBSan runtime for windows/darwin builds.
if !ctx.Os().Linux() {
s.Cfi = nil
s.Diag.Cfi = nil
s.Misc_undefined = nil
@ -439,12 +440,19 @@ func toDisableImplicitIntegerChange(flags []string) bool {
func (sanitize *sanitize) flags(ctx ModuleContext, flags Flags) Flags {
minimalRuntimeLib := config.UndefinedBehaviorSanitizerMinimalRuntimeLibrary(ctx.toolchain()) + ".a"
minimalRuntimePath := "${config.ClangAsanLibDir}/" + minimalRuntimeLib
builtinsRuntimeLib := config.BuiltinsRuntimeLibrary(ctx.toolchain()) + ".a"
builtinsRuntimePath := "${config.ClangAsanLibDir}/" + builtinsRuntimeLib
if ctx.Device() && sanitize.Properties.MinimalRuntimeDep {
if sanitize.Properties.MinimalRuntimeDep {
flags.Local.LdFlags = append(flags.Local.LdFlags,
minimalRuntimePath,
"-Wl,--exclude-libs,"+minimalRuntimeLib)
}
if sanitize.Properties.BuiltinsDep {
flags.libFlags = append([]string{builtinsRuntimePath}, flags.libFlags...)
}
if !sanitize.Properties.SanitizerEnabled && !sanitize.Properties.UbsanRuntimeDep {
return flags
}
@ -547,11 +555,19 @@ func (sanitize *sanitize) flags(ctx ModuleContext, flags Flags) Flags {
// there will always be undefined symbols in intermediate libraries.
_, flags.Global.LdFlags = removeFromList("-Wl,--no-undefined", flags.Global.LdFlags)
flags.Local.LdFlags = append(flags.Local.LdFlags, sanitizeArg)
} else {
if enableMinimalRuntime(sanitize) {
flags.Local.CFlags = append(flags.Local.CFlags, strings.Join(minimalRuntimeFlags, " "))
flags.libFlags = append([]string{minimalRuntimePath}, flags.libFlags...)
flags.Local.LdFlags = append(flags.Local.LdFlags, "-Wl,--exclude-libs,"+minimalRuntimeLib)
// non-Bionic toolchain prebuilts are missing UBSan's vptr and function sanitizers
if !ctx.toolchain().Bionic() {
flags.Local.CFlags = append(flags.Local.CFlags, "-fno-sanitize=vptr,function")
}
}
if enableMinimalRuntime(sanitize) {
flags.Local.CFlags = append(flags.Local.CFlags, strings.Join(minimalRuntimeFlags, " "))
flags.libFlags = append([]string{minimalRuntimePath}, flags.libFlags...)
flags.Local.LdFlags = append(flags.Local.LdFlags, "-Wl,--exclude-libs,"+minimalRuntimeLib)
if !ctx.toolchain().Bionic() {
flags.libFlags = append([]string{builtinsRuntimePath}, flags.libFlags...)
}
}
@ -766,6 +782,10 @@ func sanitizerRuntimeDepsMutator(mctx android.TopDownMutatorContext) {
return false
}
if c.Os() == android.Linux {
c.sanitize.Properties.BuiltinsDep = true
}
return true
}
@ -902,11 +922,14 @@ func sanitizerRuntimeMutator(mctx android.BottomUpMutatorContext) {
runtimeLibrary = config.ScudoRuntimeLibrary(toolchain)
}
} else if len(diagSanitizers) > 0 || c.sanitize.Properties.UbsanRuntimeDep ||
Bool(c.sanitize.Properties.Sanitize.Fuzzer) {
Bool(c.sanitize.Properties.Sanitize.Fuzzer) ||
Bool(c.sanitize.Properties.Sanitize.Undefined) ||
Bool(c.sanitize.Properties.Sanitize.All_undefined) {
runtimeLibrary = config.UndefinedBehaviorSanitizerRuntimeLibrary(toolchain)
}
if mctx.Device() && runtimeLibrary != "" {
if runtimeLibrary != "" && (toolchain.Bionic() || c.sanitize.Properties.UbsanRuntimeDep) {
// UBSan is supported on non-bionic linux host builds as well
if isLlndkLibrary(runtimeLibrary, mctx.Config()) && !c.static() && c.UseVndk() {
runtimeLibrary = runtimeLibrary + llndkLibrarySuffix
}
@ -1079,11 +1102,17 @@ func enableMinimalRuntime(sanitize *sanitize) bool {
if !Bool(sanitize.Properties.Sanitize.Address) &&
!Bool(sanitize.Properties.Sanitize.Hwaddress) &&
!Bool(sanitize.Properties.Sanitize.Fuzzer) &&
(Bool(sanitize.Properties.Sanitize.Integer_overflow) ||
len(sanitize.Properties.Sanitize.Misc_undefined) > 0) &&
len(sanitize.Properties.Sanitize.Misc_undefined) > 0 ||
Bool(sanitize.Properties.Sanitize.Undefined) ||
Bool(sanitize.Properties.Sanitize.All_undefined)) &&
!(Bool(sanitize.Properties.Sanitize.Diag.Integer_overflow) ||
Bool(sanitize.Properties.Sanitize.Diag.Cfi) ||
Bool(sanitize.Properties.Sanitize.Diag.Undefined) ||
len(sanitize.Properties.Sanitize.Diag.Misc_undefined) > 0) {
return true
}
return false
@ -1091,6 +1120,7 @@ func enableMinimalRuntime(sanitize *sanitize) bool {
func enableUbsanRuntime(sanitize *sanitize) bool {
return Bool(sanitize.Properties.Sanitize.Diag.Integer_overflow) ||
Bool(sanitize.Properties.Sanitize.Diag.Undefined) ||
len(sanitize.Properties.Sanitize.Diag.Misc_undefined) > 0
}