343 lines
16 KiB
C
343 lines
16 KiB
C
// RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK
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// RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -fno-sanitize-recover=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_implicit_conversion" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-NORECOVER,CHECK-SANITIZE-UNREACHABLE
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// RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -fsanitize-recover=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_implicit_conversion" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-RECOVER
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// RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -fsanitize-trap=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_implicit_conversion" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-TRAP,CHECK-SANITIZE-UNREACHABLE
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// CHECK-SANITIZE-ANYRECOVER: @[[UNSIGNED_INT:.*]] = {{.*}} c"'unsigned int'\00" }
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// CHECK-SANITIZE-ANYRECOVER: @[[UNSIGNED_CHAR:.*]] = {{.*}} c"'unsigned char'\00" }
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// CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 100, i32 10 }, {{.*}}* @[[UNSIGNED_INT]], {{.*}}* @[[UNSIGNED_CHAR]], i8 1 }
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// CHECK-SANITIZE-ANYRECOVER: @[[SIGNED_INT:.*]] = {{.*}} c"'int'\00" }
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// CHECK-SANITIZE-ANYRECOVER: @[[LINE_200_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 200, i32 10 }, {{.*}}* @[[SIGNED_INT]], {{.*}}* @[[UNSIGNED_CHAR]], i8 2 }
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// CHECK-SANITIZE-ANYRECOVER: @[[SIGNED_CHAR:.*]] = {{.*}} c"'signed char'\00" }
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// CHECK-SANITIZE-ANYRECOVER: @[[LINE_300_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 300, i32 10 }, {{.*}}* @[[UNSIGNED_INT]], {{.*}}* @[[SIGNED_CHAR]], i8 2 }
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// CHECK-SANITIZE-ANYRECOVER: @[[LINE_400_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 400, i32 10 }, {{.*}}* @[[SIGNED_INT]], {{.*}}* @[[SIGNED_CHAR]], i8 2 }
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// CHECK-SANITIZE-ANYRECOVER: @[[UINT32:.*]] = {{.*}} c"'uint32_t' (aka 'unsigned int')\00" }
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// CHECK-SANITIZE-ANYRECOVER: @[[UINT8:.*]] = {{.*}} c"'uint8_t' (aka 'unsigned char')\00" }
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// CHECK-SANITIZE-ANYRECOVER: @[[LINE_500_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 500, i32 10 }, {{.*}}* @[[UINT32]], {{.*}}* @[[UINT8]], i8 1 }
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// ========================================================================== //
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// The expected true-positives. These are implicit conversions, and they truncate.
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// ========================================================================== //
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// CHECK-LABEL: @unsigned_int_to_unsigned_char
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unsigned char unsigned_int_to_unsigned_char(unsigned int src) {
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// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
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// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = zext i8 %[[DST]] to i32, !nosanitize
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// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
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// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
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// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
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// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_100_UNSIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
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// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_100_UNSIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
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// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 7){{.*}}, !nosanitize
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// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
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// CHECK-SANITIZE: [[CONT]]:
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// CHECK-NEXT: ret i8 %[[DST]]
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// CHECK-NEXT: }
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#line 100
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return src;
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}
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// CHECK-LABEL: @signed_int_to_unsigned_char
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unsigned char signed_int_to_unsigned_char(signed int src) {
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// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
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// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = zext i8 %[[DST]] to i32, !nosanitize
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// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
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// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
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// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
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// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_200_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
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// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_200_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
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// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 7){{.*}}, !nosanitize
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// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
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// CHECK-SANITIZE: [[CONT]]:
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// CHECK-NEXT: ret i8 %[[DST]]
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// CHECK-NEXT: }
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#line 200
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return src;
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}
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// CHECK-LABEL: @unsigned_int_to_signed_char
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signed char unsigned_int_to_signed_char(unsigned int src) {
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// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
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// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = sext i8 %[[DST]] to i32, !nosanitize
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// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
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// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
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// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
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// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_300_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
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// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_300_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
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// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 7){{.*}}, !nosanitize
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// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
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// CHECK-SANITIZE: [[CONT]]:
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// CHECK-NEXT: ret i8 %[[DST]]
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// CHECK-NEXT: }
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#line 300
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return src;
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}
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// CHECK-LABEL: @signed_int_to_signed_char
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signed char signed_int_to_signed_char(signed int src) {
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// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
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// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = sext i8 %[[DST]] to i32, !nosanitize
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// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
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// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
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// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
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// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_400_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
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// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_400_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
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// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 7){{.*}}, !nosanitize
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// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
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// CHECK-SANITIZE: [[CONT]]:
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// CHECK-NEXT: ret i8 %[[DST]]
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// CHECK-NEXT: }
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#line 400
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return src;
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}
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// ========================================================================== //
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// Check canonical type stuff
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// ========================================================================== //
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typedef unsigned int uint32_t;
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typedef unsigned char uint8_t;
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// CHECK-LABEL: @uint32_to_uint8
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uint8_t uint32_to_uint8(uint32_t src) {
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// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
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// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = zext i8 %[[DST]] to i32, !nosanitize
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// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
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// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
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// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
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// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
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// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_500_UNSIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
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// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_500_UNSIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
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// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 7){{.*}}, !nosanitize
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// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
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// CHECK-SANITIZE: [[CONT]]:
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// CHECK-NEXT: ret i8 %[[DST]]
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// CHECK-NEXT: }
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#line 500
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return src;
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}
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// ========================================================================== //
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// Check that explicit conversion does not interfere with implicit conversion
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// ========================================================================== //
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// These contain one implicit truncating conversion, and one explicit truncating conversion.
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// We want to make sure that we still diagnose the implicit conversion.
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// Implicit truncation after explicit truncation.
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// CHECK-LABEL: @explicit_conversion_interference0
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unsigned char explicit_conversion_interference0(unsigned int c) {
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// CHECK-SANITIZE: %[[ANYEXT:.*]] = zext i8 %[[DST:.*]] to i16, !nosanitize
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// CHECK-SANITIZE: call
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return (unsigned short)c;
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}
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// Implicit truncation before explicit truncation.
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// CHECK-LABEL: @explicit_conversion_interference1
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unsigned char explicit_conversion_interference1(unsigned int c) {
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// CHECK-SANITIZE: %[[ANYEXT:.*]] = zext i16 %[[DST:.*]] to i32, !nosanitize
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// CHECK-SANITIZE: call
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unsigned short b;
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return (unsigned char)(b = c);
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}
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// ========================================================================== //
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// The expected true-negatives.
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// ========================================================================== //
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// Sanitization is explicitly disabled.
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// ========================================================================== //
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// CHECK-LABEL: @blacklist_0
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__attribute__((no_sanitize("undefined"))) unsigned char blacklist_0(unsigned int src) {
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// We are not in "undefined" group, so that doesn't work.
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// CHECK-SANITIZE: call
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return src;
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}
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// CHECK-LABEL: @blacklist_1
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__attribute__((no_sanitize("integer"))) unsigned char blacklist_1(unsigned int src) {
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return src;
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}
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// CHECK-LABEL: @blacklist_2
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__attribute__((no_sanitize("implicit-conversion"))) unsigned char blacklist_2(unsigned int src) {
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return src;
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}
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// CHECK-LABEL: @blacklist_3
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__attribute__((no_sanitize("implicit-integer-truncation"))) unsigned char blacklist_3(unsigned int src) {
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return src;
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}
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// Explicit truncating conversions.
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// ========================================================================== //
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// CHECK-LABEL: @explicit_unsigned_int_to_unsigned_char
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unsigned char explicit_unsigned_int_to_unsigned_char(unsigned int src) {
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return (unsigned char)src;
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}
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// CHECK-LABEL: @explicit_signed_int_to_unsigned_char
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unsigned char explicit_signed_int_to_unsigned_char(signed int src) {
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return (unsigned char)src;
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}
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// CHECK-LABEL: @explicit_unsigned_int_to_signed_char
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signed char explicit_unsigned_int_to_signed_char(unsigned int src) {
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return (signed char)src;
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}
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// CHECK-LABEL: @explicit_signed_int_to_signed_char
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signed char explicit_signed_int_to_signed_char(signed int src) {
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return (signed char)src;
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}
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// Explicit NOP conversions.
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// ========================================================================== //
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// CHECK-LABEL: @explicit_unsigned_int_to_unsigned_int
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unsigned int explicit_unsigned_int_to_unsigned_int(unsigned int src) {
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return (unsigned int)src;
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}
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// CHECK-LABEL: @explicit_signed_int_to_signed_int
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signed int explicit_signed_int_to_signed_int(signed int src) {
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return (signed int)src;
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}
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// CHECK-LABEL: @explicit_unsigned_char_to_signed_char
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unsigned char explicit_unsigned_char_to_signed_char(unsigned char src) {
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return (unsigned char)src;
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}
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// CHECK-LABEL: @explicit_signed_char_to_signed_char
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signed char explicit_signed_char_to_signed_char(signed char src) {
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return (signed char)src;
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}
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// upcasts.
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// ========================================================================== //
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// CHECK-LABEL: @unsigned_char_to_unsigned_int
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unsigned int unsigned_char_to_unsigned_int(unsigned char src) {
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return src;
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}
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// CHECK-LABEL: @signed_char_to_unsigned_int
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unsigned int signed_char_to_unsigned_int(signed char src) {
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return src;
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}
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// CHECK-LABEL: @unsigned_char_to_signed_int
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signed int unsigned_char_to_signed_int(unsigned char src) {
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return src;
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}
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// CHECK-LABEL: @signed_char_to_signed_int
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signed int signed_char_to_signed_int(signed char src) {
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return src;
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}
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// Explicit upcasts.
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// ========================================================================== //
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// CHECK-LABEL: @explicit_unsigned_char_to_unsigned_int
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unsigned int explicit_unsigned_char_to_unsigned_int(unsigned char src) {
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return (unsigned int)src;
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}
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// CHECK-LABEL: @explicit_signed_char_to_unsigned_int
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unsigned int explicit_signed_char_to_unsigned_int(signed char src) {
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return (unsigned int)src;
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}
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// CHECK-LABEL: @explicit_unsigned_char_to_signed_int
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signed int explicit_unsigned_char_to_signed_int(unsigned char src) {
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return (signed int)src;
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}
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// CHECK-LABEL: @explicit_signed_char_to_signed_int
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signed int explicit_signed_char_to_signed_int(signed char src) {
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return (signed int)src;
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}
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// conversions to to boolean type are not counted as truncation.
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// ========================================================================== //
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// CHECK-LABEL: @unsigned_int_to_bool
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_Bool unsigned_int_to_bool(unsigned int src) {
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return src;
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}
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// CHECK-LABEL: @signed_int_to_bool
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_Bool signed_int_to_bool(signed int src) {
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return src;
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}
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// CHECK-LABEL: @explicit_unsigned_int_to_bool
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_Bool explicit_unsigned_int_to_bool(unsigned int src) {
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return (_Bool)src;
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}
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// CHECK-LABEL: @explicit_signed_int_to_bool
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_Bool explicit_signed_int_to_bool(signed int src) {
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return (_Bool)src;
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}
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// Explicit truncating conversions from pointer to a much-smaller integer.
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// Can not have an implicit conversion from pointer to an integer.
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// Can not have an implicit conversion between two enums.
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// ========================================================================== //
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// CHECK-LABEL: @explicit_voidptr_to_unsigned_char
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unsigned char explicit_voidptr_to_unsigned_char(void *src) {
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return (unsigned char)src;
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}
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// CHECK-LABEL: @explicit_voidptr_to_signed_char
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signed char explicit_voidptr_to_signed_char(void *src) {
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return (signed char)src;
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}
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// Implicit truncating conversions from floating-point may result in precision loss.
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// ========================================================================== //
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// CHECK-LABEL: @float_to_unsigned_int
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unsigned int float_to_unsigned_int(float src) {
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return src;
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}
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// CHECK-LABEL: @float_to_signed_int
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signed int float_to_signed_int(float src) {
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return src;
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}
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// CHECK-LABEL: @double_to_unsigned_int
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unsigned int double_to_unsigned_int(double src) {
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return src;
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}
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// CHECK-LABEL: @double_to_signed_int
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signed int double_to_signed_int(double src) {
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return src;
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}
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// Implicit truncating conversions between fp may result in precision loss.
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// ========================================================================== //
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// CHECK-LABEL: @double_to_float
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float double_to_float(double src) {
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return src;
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}
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