[asan] Add gcc 8's driver option -fsanitize=pointer-compare and -fsanitize=pointer-substract.
Disabled by default as this is still an experimental feature.
Reviewed By: thakis
Differential Revision: https://reviews.llvm.org/D59221
llvm-svn: 358285
diff --git a/clang/include/clang/Basic/Sanitizers.def b/clang/include/clang/Basic/Sanitizers.def
index 3e15348..f54e082 100644
--- a/clang/include/clang/Basic/Sanitizers.def
+++ b/clang/include/clang/Basic/Sanitizers.def
@@ -40,6 +40,12 @@
// AddressSanitizer
SANITIZER("address", Address)
+// Requires AddressSanitizer
+SANITIZER("pointer-compare", PointerCompare)
+
+// Requires AddressSanitizer
+SANITIZER("pointer-subtract", PointerSubtract)
+
// Kernel AddressSanitizer (KASan)
SANITIZER("kernel-address", KernelAddress)
diff --git a/clang/include/clang/Driver/SanitizerArgs.h b/clang/include/clang/Driver/SanitizerArgs.h
index b12e7ab..957e752 100644
--- a/clang/include/clang/Driver/SanitizerArgs.h
+++ b/clang/include/clang/Driver/SanitizerArgs.h
@@ -38,6 +38,8 @@
bool AsanPoisonCustomArrayCookie = false;
bool AsanGlobalsDeadStripping = false;
bool AsanUseOdrIndicator = false;
+ bool AsanInvalidPointerCmp = false;
+ bool AsanInvalidPointerSub = false;
std::string HwasanAbi;
bool LinkCXXRuntimes = false;
bool NeedPIE = false;
diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index d6cef88..7127e97 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -775,8 +775,27 @@
Args.hasFlag(options::OPT_fsanitize_address_use_odr_indicator,
options::OPT_fno_sanitize_address_use_odr_indicator,
AsanUseOdrIndicator);
+
+ if (AllAddedKinds & SanitizerKind::PointerCompare & ~AllRemove) {
+ AsanInvalidPointerCmp = true;
+ }
+
+ if (AllAddedKinds & SanitizerKind::PointerSubtract & ~AllRemove) {
+ AsanInvalidPointerSub = true;
+ }
+
} else {
AsanUseAfterScope = false;
+ // -fsanitize=pointer-compare/pointer-subtract requires -fsanitize=address.
+ SanitizerMask DetectInvalidPointerPairs =
+ SanitizerKind::PointerCompare | SanitizerKind::PointerSubtract;
+ if (AllAddedKinds & DetectInvalidPointerPairs & ~AllRemove) {
+ TC.getDriver().Diag(clang::diag::err_drv_argument_only_allowed_with)
+ << lastArgumentForMask(D, Args,
+ SanitizerKind::PointerCompare |
+ SanitizerKind::PointerSubtract)
+ << "-fsanitize=address";
+ }
}
if (AllAddedKinds & SanitizerKind::HWAddress) {
@@ -963,6 +982,16 @@
if (AsanUseOdrIndicator)
CmdArgs.push_back("-fsanitize-address-use-odr-indicator");
+ if (AsanInvalidPointerCmp) {
+ CmdArgs.push_back("-mllvm");
+ CmdArgs.push_back("-asan-detect-invalid-pointer-cmp");
+ }
+
+ if (AsanInvalidPointerSub) {
+ CmdArgs.push_back("-mllvm");
+ CmdArgs.push_back("-asan-detect-invalid-pointer-sub");
+ }
+
if (!HwasanAbi.empty()) {
CmdArgs.push_back("-default-function-attr");
CmdArgs.push_back(Args.MakeArgString("hwasan-abi=" + HwasanAbi));
diff --git a/clang/lib/Driver/ToolChains/CrossWindows.cpp b/clang/lib/Driver/ToolChains/CrossWindows.cpp
index 959dfd2..bd3a6e1 100644
--- a/clang/lib/Driver/ToolChains/CrossWindows.cpp
+++ b/clang/lib/Driver/ToolChains/CrossWindows.cpp
@@ -277,6 +277,8 @@
clang::SanitizerMask CrossWindowsToolChain::getSupportedSanitizers() const {
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::PointerCompare;
+ Res |= SanitizerKind::PointerSubtract;
return Res;
}
diff --git a/clang/lib/Driver/ToolChains/Darwin.cpp b/clang/lib/Driver/ToolChains/Darwin.cpp
index e113f9a..3441436 100644
--- a/clang/lib/Driver/ToolChains/Darwin.cpp
+++ b/clang/lib/Driver/ToolChains/Darwin.cpp
@@ -2375,6 +2375,8 @@
const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::PointerCompare;
+ Res |= SanitizerKind::PointerSubtract;
Res |= SanitizerKind::Leak;
Res |= SanitizerKind::Fuzzer;
Res |= SanitizerKind::FuzzerNoLink;
diff --git a/clang/lib/Driver/ToolChains/FreeBSD.cpp b/clang/lib/Driver/ToolChains/FreeBSD.cpp
index 55586df..3a0bab8 100644
--- a/clang/lib/Driver/ToolChains/FreeBSD.cpp
+++ b/clang/lib/Driver/ToolChains/FreeBSD.cpp
@@ -410,6 +410,8 @@
const bool IsMIPS64 = getTriple().isMIPS64();
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::PointerCompare;
+ Res |= SanitizerKind::PointerSubtract;
Res |= SanitizerKind::Vptr;
if (IsX86_64 || IsMIPS64) {
Res |= SanitizerKind::Leak;
diff --git a/clang/lib/Driver/ToolChains/Fuchsia.cpp b/clang/lib/Driver/ToolChains/Fuchsia.cpp
index 0db6d0e..2db2d88 100644
--- a/clang/lib/Driver/ToolChains/Fuchsia.cpp
+++ b/clang/lib/Driver/ToolChains/Fuchsia.cpp
@@ -283,6 +283,8 @@
SanitizerMask Fuchsia::getSupportedSanitizers() const {
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::PointerCompare;
+ Res |= SanitizerKind::PointerSubtract;
Res |= SanitizerKind::Fuzzer;
Res |= SanitizerKind::FuzzerNoLink;
Res |= SanitizerKind::SafeStack;
diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
index 50b3924..e9169e9 100644
--- a/clang/lib/Driver/ToolChains/Linux.cpp
+++ b/clang/lib/Driver/ToolChains/Linux.cpp
@@ -1003,6 +1003,8 @@
getTriple().getArch() == llvm::Triple::thumbeb;
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::PointerCompare;
+ Res |= SanitizerKind::PointerSubtract;
Res |= SanitizerKind::Fuzzer;
Res |= SanitizerKind::FuzzerNoLink;
Res |= SanitizerKind::KernelAddress;
diff --git a/clang/lib/Driver/ToolChains/MSVC.cpp b/clang/lib/Driver/ToolChains/MSVC.cpp
index f360e5b..1dc2091 100644
--- a/clang/lib/Driver/ToolChains/MSVC.cpp
+++ b/clang/lib/Driver/ToolChains/MSVC.cpp
@@ -1317,6 +1317,8 @@
SanitizerMask MSVCToolChain::getSupportedSanitizers() const {
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::PointerCompare;
+ Res |= SanitizerKind::PointerSubtract;
Res |= SanitizerKind::Fuzzer;
Res |= SanitizerKind::FuzzerNoLink;
Res &= ~SanitizerKind::CFIMFCall;
diff --git a/clang/lib/Driver/ToolChains/MinGW.cpp b/clang/lib/Driver/ToolChains/MinGW.cpp
index ca41afe..c793bde 100644
--- a/clang/lib/Driver/ToolChains/MinGW.cpp
+++ b/clang/lib/Driver/ToolChains/MinGW.cpp
@@ -459,6 +459,8 @@
SanitizerMask toolchains::MinGW::getSupportedSanitizers() const {
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::PointerCompare;
+ Res |= SanitizerKind::PointerSubtract;
return Res;
}
diff --git a/clang/lib/Driver/ToolChains/NetBSD.cpp b/clang/lib/Driver/ToolChains/NetBSD.cpp
index 2875960..3219a5d 100644
--- a/clang/lib/Driver/ToolChains/NetBSD.cpp
+++ b/clang/lib/Driver/ToolChains/NetBSD.cpp
@@ -463,6 +463,8 @@
SanitizerMask Res = ToolChain::getSupportedSanitizers();
if (IsX86 || IsX86_64) {
Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::PointerCompare;
+ Res |= SanitizerKind::PointerSubtract;
Res |= SanitizerKind::Function;
Res |= SanitizerKind::Leak;
Res |= SanitizerKind::SafeStack;
diff --git a/clang/lib/Driver/ToolChains/PS4CPU.cpp b/clang/lib/Driver/ToolChains/PS4CPU.cpp
index b3e1989..7be4713 100644
--- a/clang/lib/Driver/ToolChains/PS4CPU.cpp
+++ b/clang/lib/Driver/ToolChains/PS4CPU.cpp
@@ -425,6 +425,8 @@
SanitizerMask toolchains::PS4CPU::getSupportedSanitizers() const {
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::PointerCompare;
+ Res |= SanitizerKind::PointerSubtract;
Res |= SanitizerKind::Vptr;
return Res;
}
diff --git a/clang/lib/Driver/ToolChains/Solaris.cpp b/clang/lib/Driver/ToolChains/Solaris.cpp
index d92cab4..9ea9058 100644
--- a/clang/lib/Driver/ToolChains/Solaris.cpp
+++ b/clang/lib/Driver/ToolChains/Solaris.cpp
@@ -199,6 +199,8 @@
// FIXME: Omit X86_64 until 64-bit support is figured out.
if (IsX86) {
Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::PointerCompare;
+ Res |= SanitizerKind::PointerSubtract;
}
Res |= SanitizerKind::Vptr;
return Res;
diff --git a/clang/test/Driver/fsanitize.c b/clang/test/Driver/fsanitize.c
index 454722a..8268ed5 100644
--- a/clang/test/Driver/fsanitize.c
+++ b/clang/test/Driver/fsanitize.c
@@ -829,3 +829,14 @@
// CHECK-HWASAN-INTERCEPTOR-ABI: "-default-function-attr" "hwasan-abi=interceptor"
// CHECK-HWASAN-PLATFORM-ABI: "-default-function-attr" "hwasan-abi=platform"
// CHECK-HWASAN-FOO-ABI: error: invalid value 'foo' in '-fsanitize-hwaddress-abi=foo'
+
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=address,pointer-compare,pointer-subtract %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-POINTER-ALL
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=pointer-compare %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-POINTER-CMP-NEEDS-ADDRESS
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=pointer-subtract %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-POINTER-SUB-NEEDS-ADDRESS
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=pointer-subtract -fno-sanitize=pointer-subtract %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-NO-POINTER-SUB
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=pointer-compare -fno-sanitize=pointer-compare %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-NO-POINTER-CMP
+// CHECK-POINTER-ALL: -cc1{{.*}}-fsanitize={{[^"]*}}pointer-compare,pointer-subtract{{.*}}" {{.*}} "-mllvm" "-asan-detect-invalid-pointer-cmp" {{.*}}"-mllvm" "-asan-detect-invalid-pointer-sub"
+// CHECK-POINTER-CMP-NEEDS-ADDRESS: error: invalid argument '-fsanitize=pointer-compare' only allowed with '-fsanitize=address'
+// CHECK-POINTER-SUB-NEEDS-ADDRESS: error: invalid argument '-fsanitize=pointer-subtract' only allowed with '-fsanitize=address'
+// CHECK-NO-POINTER-SUB-NOT: {{.*}}asan-detect-invalid-pointer{{.*}}
+// CHECK-NO-POINTER-CMP-NOT: {{.*}}asan-detect-invalid-pointer{{.*}}