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[clang][CodeGen] Guard ubsan checks with llvm.allow.ubsan.check #87436

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Apr 5, 2024
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[clang][CodeGen] Guard ubsan checks with llvm.allow.ubsan.check #87436

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[𝘀𝗽𝗿] initial version
vitalybuka Apr 3, 2024
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undo unrelated change
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19 changes: 18 additions & 1 deletion clang/lib/CodeGen/CGExpr.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,13 @@ using namespace CodeGen;
// Experiment to make sanitizers easier to debug
static llvm::cl::opt<bool> ClSanitizeDebugDeoptimization(
"ubsan-unique-traps", llvm::cl::Optional,
llvm::cl::desc("Deoptimize traps for UBSAN so there is 1 trap per check"));
llvm::cl::desc("Deoptimize traps for UBSAN so there is 1 trap per check."));

// TODO: Introduce frontend options to enabled per sanitizers, similar to
// `fsanitize-trap`.
static llvm::cl::opt<bool> ClSanitizeGuardChecks(
"ubsan-guard-checks", llvm::cl::Optional,
llvm::cl::desc("Guard UBSAN checks with `llvm.allow.ubsan.check()`."));

//===--------------------------------------------------------------------===//
// Miscellaneous Helper Methods
Expand Down Expand Up @@ -3522,6 +3528,17 @@ void CodeGenFunction::EmitCheck(
Cond = Cond ? Builder.CreateAnd(Cond, Check) : Check;
}

if (ClSanitizeGuardChecks) {
llvm::Value *Allow =
Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::allow_ubsan_check),
llvm::ConstantInt::get(CGM.Int8Ty, CheckHandler));

for (llvm::Value **Cond : {&FatalCond, &RecoverableCond, &TrapCond}) {
if (*Cond)
*Cond = Builder.CreateOr(*Cond, Builder.CreateNot(Allow));
}
}

if (TrapCond)
EmitTrapCheck(TrapCond, CheckHandler);
if (!FatalCond && !RecoverableCond)
Expand Down
101 changes: 64 additions & 37 deletions clang/test/CodeGen/allow-ubsan-check.c
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 4
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm -o - %s -fsanitize=signed-integer-overflow,integer-divide-by-zero,null | FileCheck %s
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm -o - %s -fsanitize=signed-integer-overflow,integer-divide-by-zero,null -fsanitize-trap=signed-integer-overflow,integer-divide-by-zero,null | FileCheck %s --check-prefixes=TRAP
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm -o - %s -fsanitize=signed-integer-overflow,integer-divide-by-zero,null -fsanitize-recover=signed-integer-overflow,integer-divide-by-zero,null | FileCheck %s --check-prefixes=RECOVER
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm -o - %s -fsanitize=signed-integer-overflow,integer-divide-by-zero,null -mllvm -ubsan-guard-checks | FileCheck %s
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm -o - %s -fsanitize=signed-integer-overflow,integer-divide-by-zero,null -mllvm -ubsan-guard-checks -fsanitize-trap=signed-integer-overflow,integer-divide-by-zero,null | FileCheck %s --check-prefixes=TRAP
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm -o - %s -fsanitize=signed-integer-overflow,integer-divide-by-zero,null -mllvm -ubsan-guard-checks -fsanitize-recover=signed-integer-overflow,integer-divide-by-zero,null | FileCheck %s --check-prefixes=RECOVER


// CHECK-LABEL: define dso_local i32 @div(
Expand All @@ -18,11 +18,14 @@
// CHECK-NEXT: [[TMP4:%.*]] = icmp ne i32 [[TMP1]], -1, !nosanitize [[META2]]
// CHECK-NEXT: [[OR:%.*]] = or i1 [[TMP3]], [[TMP4]], !nosanitize [[META2]]
// CHECK-NEXT: [[TMP5:%.*]] = and i1 [[TMP2]], [[OR]], !nosanitize [[META2]]
// CHECK-NEXT: br i1 [[TMP5]], label [[CONT:%.*]], label [[HANDLER_DIVREM_OVERFLOW:%.*]], !prof [[PROF3:![0-9]+]], !nosanitize [[META2]]
// CHECK-NEXT: [[TMP6:%.*]] = call i1 @llvm.allow.ubsan.check(i8 3), !nosanitize [[META2]]
// CHECK-NEXT: [[TMP7:%.*]] = xor i1 [[TMP6]], true, !nosanitize [[META2]]
// CHECK-NEXT: [[TMP8:%.*]] = or i1 [[TMP5]], [[TMP7]], !nosanitize [[META2]]
// CHECK-NEXT: br i1 [[TMP8]], label [[CONT:%.*]], label [[HANDLER_DIVREM_OVERFLOW:%.*]], !prof [[PROF3:![0-9]+]], !nosanitize [[META2]]
// CHECK: handler.divrem_overflow:
// CHECK-NEXT: [[TMP6:%.*]] = zext i32 [[TMP0]] to i64, !nosanitize [[META2]]
// CHECK-NEXT: [[TMP7:%.*]] = zext i32 [[TMP1]] to i64, !nosanitize [[META2]]
// CHECK-NEXT: call void @__ubsan_handle_divrem_overflow_abort(ptr @[[GLOB1:[0-9]+]], i64 [[TMP6]], i64 [[TMP7]]) #[[ATTR3:[0-9]+]], !nosanitize [[META2]]
// CHECK-NEXT: [[TMP9:%.*]] = zext i32 [[TMP0]] to i64, !nosanitize [[META2]]
// CHECK-NEXT: [[TMP10:%.*]] = zext i32 [[TMP1]] to i64, !nosanitize [[META2]]
// CHECK-NEXT: call void @__ubsan_handle_divrem_overflow_abort(ptr @[[GLOB1:[0-9]+]], i64 [[TMP9]], i64 [[TMP10]]) #[[ATTR4:[0-9]+]], !nosanitize [[META2]]
// CHECK-NEXT: unreachable, !nosanitize [[META2]]
// CHECK: cont:
// CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[TMP0]], [[TMP1]]
Expand All @@ -42,9 +45,12 @@
// TRAP-NEXT: [[TMP4:%.*]] = icmp ne i32 [[TMP1]], -1, !nosanitize [[META2]]
// TRAP-NEXT: [[OR:%.*]] = or i1 [[TMP3]], [[TMP4]], !nosanitize [[META2]]
// TRAP-NEXT: [[TMP5:%.*]] = and i1 [[TMP2]], [[OR]], !nosanitize [[META2]]
// TRAP-NEXT: br i1 [[TMP5]], label [[CONT:%.*]], label [[TRAP:%.*]], !nosanitize [[META2]]
// TRAP-NEXT: [[TMP6:%.*]] = call i1 @llvm.allow.ubsan.check(i8 3), !nosanitize [[META2]]
// TRAP-NEXT: [[TMP7:%.*]] = xor i1 [[TMP6]], true, !nosanitize [[META2]]
// TRAP-NEXT: [[TMP8:%.*]] = or i1 [[TMP5]], [[TMP7]], !nosanitize [[META2]]
// TRAP-NEXT: br i1 [[TMP8]], label [[CONT:%.*]], label [[TRAP:%.*]], !nosanitize [[META2]]
// TRAP: trap:
// TRAP-NEXT: call void @llvm.ubsantrap(i8 3) #[[ATTR3:[0-9]+]], !nosanitize [[META2]]
// TRAP-NEXT: call void @llvm.ubsantrap(i8 3) #[[ATTR4:[0-9]+]], !nosanitize [[META2]]
// TRAP-NEXT: unreachable, !nosanitize [[META2]]
// TRAP: cont:
// TRAP-NEXT: [[DIV:%.*]] = sdiv i32 [[TMP0]], [[TMP1]]
Expand All @@ -64,11 +70,14 @@
// RECOVER-NEXT: [[TMP4:%.*]] = icmp ne i32 [[TMP1]], -1, !nosanitize [[META2]]
// RECOVER-NEXT: [[OR:%.*]] = or i1 [[TMP3]], [[TMP4]], !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP5:%.*]] = and i1 [[TMP2]], [[OR]], !nosanitize [[META2]]
// RECOVER-NEXT: br i1 [[TMP5]], label [[CONT:%.*]], label [[HANDLER_DIVREM_OVERFLOW:%.*]], !prof [[PROF3:![0-9]+]], !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP6:%.*]] = call i1 @llvm.allow.ubsan.check(i8 3), !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP7:%.*]] = xor i1 [[TMP6]], true, !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP8:%.*]] = or i1 [[TMP5]], [[TMP7]], !nosanitize [[META2]]
// RECOVER-NEXT: br i1 [[TMP8]], label [[CONT:%.*]], label [[HANDLER_DIVREM_OVERFLOW:%.*]], !prof [[PROF3:![0-9]+]], !nosanitize [[META2]]
// RECOVER: handler.divrem_overflow:
// RECOVER-NEXT: [[TMP6:%.*]] = zext i32 [[TMP0]] to i64, !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP7:%.*]] = zext i32 [[TMP1]] to i64, !nosanitize [[META2]]
// RECOVER-NEXT: call void @__ubsan_handle_divrem_overflow(ptr @[[GLOB1:[0-9]+]], i64 [[TMP6]], i64 [[TMP7]]) #[[ATTR3:[0-9]+]], !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP9:%.*]] = zext i32 [[TMP0]] to i64, !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP10:%.*]] = zext i32 [[TMP1]] to i64, !nosanitize [[META2]]
// RECOVER-NEXT: call void @__ubsan_handle_divrem_overflow(ptr @[[GLOB1:[0-9]+]], i64 [[TMP9]], i64 [[TMP10]]) #[[ATTR4:[0-9]+]], !nosanitize [[META2]]
// RECOVER-NEXT: br label [[CONT]], !nosanitize [[META2]]
// RECOVER: cont:
// RECOVER-NEXT: [[DIV:%.*]] = sdiv i32 [[TMP0]], [[TMP1]]
Expand All @@ -85,14 +94,17 @@ int div(int x, int y) {
// CHECK-NEXT: store ptr [[X]], ptr [[X_ADDR]], align 8
// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[X_ADDR]], align 8
// CHECK-NEXT: [[TMP1:%.*]] = icmp ne ptr [[TMP0]], null, !nosanitize [[META2]]
// CHECK-NEXT: br i1 [[TMP1]], label [[CONT:%.*]], label [[HANDLER_TYPE_MISMATCH:%.*]], !prof [[PROF3]], !nosanitize [[META2]]
// CHECK-NEXT: [[TMP2:%.*]] = call i1 @llvm.allow.ubsan.check(i8 22), !nosanitize [[META2]]
// CHECK-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true, !nosanitize [[META2]]
// CHECK-NEXT: [[TMP4:%.*]] = or i1 [[TMP1]], [[TMP3]], !nosanitize [[META2]]
// CHECK-NEXT: br i1 [[TMP4]], label [[CONT:%.*]], label [[HANDLER_TYPE_MISMATCH:%.*]], !prof [[PROF3]], !nosanitize [[META2]]
// CHECK: handler.type_mismatch:
// CHECK-NEXT: [[TMP2:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META2]]
// CHECK-NEXT: call void @__ubsan_handle_type_mismatch_v1_abort(ptr @[[GLOB2:[0-9]+]], i64 [[TMP2]]) #[[ATTR3]], !nosanitize [[META2]]
// CHECK-NEXT: [[TMP5:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META2]]
// CHECK-NEXT: call void @__ubsan_handle_type_mismatch_v1_abort(ptr @[[GLOB2:[0-9]+]], i64 [[TMP5]]) #[[ATTR4]], !nosanitize [[META2]]
// CHECK-NEXT: unreachable, !nosanitize [[META2]]
// CHECK: cont:
// CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP0]], align 4
// CHECK-NEXT: ret i32 [[TMP3]]
// CHECK-NEXT: [[TMP6:%.*]] = load i32, ptr [[TMP0]], align 4
// CHECK-NEXT: ret i32 [[TMP6]]
//
// TRAP-LABEL: define dso_local i32 @null(
// TRAP-SAME: ptr noundef [[X:%.*]]) #[[ATTR0]] {
Expand All @@ -101,13 +113,16 @@ int div(int x, int y) {
// TRAP-NEXT: store ptr [[X]], ptr [[X_ADDR]], align 8
// TRAP-NEXT: [[TMP0:%.*]] = load ptr, ptr [[X_ADDR]], align 8
// TRAP-NEXT: [[TMP1:%.*]] = icmp ne ptr [[TMP0]], null, !nosanitize [[META2]]
// TRAP-NEXT: br i1 [[TMP1]], label [[CONT:%.*]], label [[TRAP:%.*]], !nosanitize [[META2]]
// TRAP-NEXT: [[TMP2:%.*]] = call i1 @llvm.allow.ubsan.check(i8 22), !nosanitize [[META2]]
// TRAP-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true, !nosanitize [[META2]]
// TRAP-NEXT: [[TMP4:%.*]] = or i1 [[TMP1]], [[TMP3]], !nosanitize [[META2]]
// TRAP-NEXT: br i1 [[TMP4]], label [[CONT:%.*]], label [[TRAP:%.*]], !nosanitize [[META2]]
// TRAP: trap:
// TRAP-NEXT: call void @llvm.ubsantrap(i8 22) #[[ATTR3]], !nosanitize [[META2]]
// TRAP-NEXT: call void @llvm.ubsantrap(i8 22) #[[ATTR4]], !nosanitize [[META2]]
// TRAP-NEXT: unreachable, !nosanitize [[META2]]
// TRAP: cont:
// TRAP-NEXT: [[TMP2:%.*]] = load i32, ptr [[TMP0]], align 4
// TRAP-NEXT: ret i32 [[TMP2]]
// TRAP-NEXT: [[TMP5:%.*]] = load i32, ptr [[TMP0]], align 4
// TRAP-NEXT: ret i32 [[TMP5]]
//
// RECOVER-LABEL: define dso_local i32 @null(
// RECOVER-SAME: ptr noundef [[X:%.*]]) #[[ATTR0]] {
Expand All @@ -116,14 +131,17 @@ int div(int x, int y) {
// RECOVER-NEXT: store ptr [[X]], ptr [[X_ADDR]], align 8
// RECOVER-NEXT: [[TMP0:%.*]] = load ptr, ptr [[X_ADDR]], align 8
// RECOVER-NEXT: [[TMP1:%.*]] = icmp ne ptr [[TMP0]], null, !nosanitize [[META2]]
// RECOVER-NEXT: br i1 [[TMP1]], label [[CONT:%.*]], label [[HANDLER_TYPE_MISMATCH:%.*]], !prof [[PROF3]], !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP2:%.*]] = call i1 @llvm.allow.ubsan.check(i8 22), !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true, !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP4:%.*]] = or i1 [[TMP1]], [[TMP3]], !nosanitize [[META2]]
// RECOVER-NEXT: br i1 [[TMP4]], label [[CONT:%.*]], label [[HANDLER_TYPE_MISMATCH:%.*]], !prof [[PROF3]], !nosanitize [[META2]]
// RECOVER: handler.type_mismatch:
// RECOVER-NEXT: [[TMP2:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META2]]
// RECOVER-NEXT: call void @__ubsan_handle_type_mismatch_v1(ptr @[[GLOB2:[0-9]+]], i64 [[TMP2]]) #[[ATTR3]], !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP5:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META2]]
// RECOVER-NEXT: call void @__ubsan_handle_type_mismatch_v1(ptr @[[GLOB2:[0-9]+]], i64 [[TMP5]]) #[[ATTR4]], !nosanitize [[META2]]
// RECOVER-NEXT: br label [[CONT]], !nosanitize [[META2]]
// RECOVER: cont:
// RECOVER-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP0]], align 4
// RECOVER-NEXT: ret i32 [[TMP3]]
// RECOVER-NEXT: [[TMP6:%.*]] = load i32, ptr [[TMP0]], align 4
// RECOVER-NEXT: ret i32 [[TMP6]]
//
int null(int* x) {
return *x;
Expand All @@ -142,11 +160,14 @@ int null(int* x) {
// CHECK-NEXT: [[TMP3:%.*]] = extractvalue { i32, i1 } [[TMP2]], 0, !nosanitize [[META2]]
// CHECK-NEXT: [[TMP4:%.*]] = extractvalue { i32, i1 } [[TMP2]], 1, !nosanitize [[META2]]
// CHECK-NEXT: [[TMP5:%.*]] = xor i1 [[TMP4]], true, !nosanitize [[META2]]
// CHECK-NEXT: br i1 [[TMP5]], label [[CONT:%.*]], label [[HANDLER_ADD_OVERFLOW:%.*]], !prof [[PROF3]], !nosanitize [[META2]]
// CHECK-NEXT: [[TMP6:%.*]] = call i1 @llvm.allow.ubsan.check(i8 0), !nosanitize [[META2]]
// CHECK-NEXT: [[TMP7:%.*]] = xor i1 [[TMP6]], true, !nosanitize [[META2]]
// CHECK-NEXT: [[TMP8:%.*]] = or i1 [[TMP5]], [[TMP7]], !nosanitize [[META2]]
// CHECK-NEXT: br i1 [[TMP8]], label [[CONT:%.*]], label [[HANDLER_ADD_OVERFLOW:%.*]], !prof [[PROF3]], !nosanitize [[META2]]
// CHECK: handler.add_overflow:
// CHECK-NEXT: [[TMP6:%.*]] = zext i32 [[TMP0]] to i64, !nosanitize [[META2]]
// CHECK-NEXT: [[TMP7:%.*]] = zext i32 [[TMP1]] to i64, !nosanitize [[META2]]
// CHECK-NEXT: call void @__ubsan_handle_add_overflow_abort(ptr @[[GLOB3:[0-9]+]], i64 [[TMP6]], i64 [[TMP7]]) #[[ATTR3]], !nosanitize [[META2]]
// CHECK-NEXT: [[TMP9:%.*]] = zext i32 [[TMP0]] to i64, !nosanitize [[META2]]
// CHECK-NEXT: [[TMP10:%.*]] = zext i32 [[TMP1]] to i64, !nosanitize [[META2]]
// CHECK-NEXT: call void @__ubsan_handle_add_overflow_abort(ptr @[[GLOB3:[0-9]+]], i64 [[TMP9]], i64 [[TMP10]]) #[[ATTR4]], !nosanitize [[META2]]
// CHECK-NEXT: unreachable, !nosanitize [[META2]]
// CHECK: cont:
// CHECK-NEXT: ret i32 [[TMP3]]
Expand All @@ -164,9 +185,12 @@ int null(int* x) {
// TRAP-NEXT: [[TMP3:%.*]] = extractvalue { i32, i1 } [[TMP2]], 0, !nosanitize [[META2]]
// TRAP-NEXT: [[TMP4:%.*]] = extractvalue { i32, i1 } [[TMP2]], 1, !nosanitize [[META2]]
// TRAP-NEXT: [[TMP5:%.*]] = xor i1 [[TMP4]], true, !nosanitize [[META2]]
// TRAP-NEXT: br i1 [[TMP5]], label [[CONT:%.*]], label [[TRAP:%.*]], !nosanitize [[META2]]
// TRAP-NEXT: [[TMP6:%.*]] = call i1 @llvm.allow.ubsan.check(i8 0), !nosanitize [[META2]]
// TRAP-NEXT: [[TMP7:%.*]] = xor i1 [[TMP6]], true, !nosanitize [[META2]]
// TRAP-NEXT: [[TMP8:%.*]] = or i1 [[TMP5]], [[TMP7]], !nosanitize [[META2]]
// TRAP-NEXT: br i1 [[TMP8]], label [[CONT:%.*]], label [[TRAP:%.*]], !nosanitize [[META2]]
// TRAP: trap:
// TRAP-NEXT: call void @llvm.ubsantrap(i8 0) #[[ATTR3]], !nosanitize [[META2]]
// TRAP-NEXT: call void @llvm.ubsantrap(i8 0) #[[ATTR4]], !nosanitize [[META2]]
// TRAP-NEXT: unreachable, !nosanitize [[META2]]
// TRAP: cont:
// TRAP-NEXT: ret i32 [[TMP3]]
Expand All @@ -184,11 +208,14 @@ int null(int* x) {
// RECOVER-NEXT: [[TMP3:%.*]] = extractvalue { i32, i1 } [[TMP2]], 0, !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP4:%.*]] = extractvalue { i32, i1 } [[TMP2]], 1, !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP5:%.*]] = xor i1 [[TMP4]], true, !nosanitize [[META2]]
// RECOVER-NEXT: br i1 [[TMP5]], label [[CONT:%.*]], label [[HANDLER_ADD_OVERFLOW:%.*]], !prof [[PROF3]], !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP6:%.*]] = call i1 @llvm.allow.ubsan.check(i8 0), !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP7:%.*]] = xor i1 [[TMP6]], true, !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP8:%.*]] = or i1 [[TMP5]], [[TMP7]], !nosanitize [[META2]]
// RECOVER-NEXT: br i1 [[TMP8]], label [[CONT:%.*]], label [[HANDLER_ADD_OVERFLOW:%.*]], !prof [[PROF3]], !nosanitize [[META2]]
// RECOVER: handler.add_overflow:
// RECOVER-NEXT: [[TMP6:%.*]] = zext i32 [[TMP0]] to i64, !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP7:%.*]] = zext i32 [[TMP1]] to i64, !nosanitize [[META2]]
// RECOVER-NEXT: call void @__ubsan_handle_add_overflow(ptr @[[GLOB3:[0-9]+]], i64 [[TMP6]], i64 [[TMP7]]) #[[ATTR3]], !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP9:%.*]] = zext i32 [[TMP0]] to i64, !nosanitize [[META2]]
// RECOVER-NEXT: [[TMP10:%.*]] = zext i32 [[TMP1]] to i64, !nosanitize [[META2]]
// RECOVER-NEXT: call void @__ubsan_handle_add_overflow(ptr @[[GLOB3:[0-9]+]], i64 [[TMP9]], i64 [[TMP10]]) #[[ATTR4]], !nosanitize [[META2]]
// RECOVER-NEXT: br label [[CONT]], !nosanitize [[META2]]
// RECOVER: cont:
// RECOVER-NEXT: ret i32 [[TMP3]]
Expand Down