// RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK
// 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
// 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
// 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
// CHECK-SANITIZE-ANYRECOVER: @[[UNSIGNED_INT:.*]] = {{.*}} c"'unsigned int'\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[UNSIGNED_CHAR:.*]] = {{.*}} c"'unsigned char'\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 100, i32 10 }, ptr @[[UNSIGNED_INT]], ptr @[[UNSIGNED_CHAR]], i8 1, i32 0 }
// CHECK-SANITIZE-ANYRECOVER: @[[SIGNED_INT:.*]] = {{.*}} c"'int'\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_200_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 200, i32 10 }, ptr @[[SIGNED_INT]], ptr @[[UNSIGNED_CHAR]], i8 2, i32 0 }
// CHECK-SANITIZE-ANYRECOVER: @[[SIGNED_CHAR:.*]] = {{.*}} c"'signed char'\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_300_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 300, i32 10 }, ptr @[[UNSIGNED_INT]], ptr @[[SIGNED_CHAR]], i8 2, i32 0 }
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_400_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 400, i32 10 }, ptr @[[SIGNED_INT]], ptr @[[SIGNED_CHAR]], i8 2, i32 0 }
// CHECK-SANITIZE-ANYRECOVER: @[[UINT32:.*]] = {{.*}} c"'uint32_t' (aka 'unsigned int')\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[UINT8:.*]] = {{.*}} c"'uint8_t' (aka 'unsigned char')\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_500_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 500, i32 10 }, ptr @[[UINT32]], ptr @[[UINT8]], i8 1, i32 0 }
// ========================================================================== //
// The expected true-positives. These are implicit conversions, and they truncate.
// ========================================================================== //
// CHECK-LABEL: @unsigned_int_to_unsigned_char
unsigned char unsigned_int_to_unsigned_char(unsigned int src) {
// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = zext i8 %[[DST]] to i32, !nosanitize
// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(ptr @[[LINE_100_UNSIGNED_TRUNCATION]], i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_100_UNSIGNED_TRUNCATION]], i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 7){{.*}}, !nosanitize
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
// CHECK-SANITIZE: [[CONT]]:
// CHECK-NEXT: ret i8 %[[DST]]
// CHECK-NEXT: }
#line 100
return src;
}
// CHECK-LABEL: @signed_int_to_unsigned_char
unsigned char signed_int_to_unsigned_char(signed int src) {
// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = zext i8 %[[DST]] to i32, !nosanitize
// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(ptr @[[LINE_200_SIGNED_TRUNCATION]], i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_200_SIGNED_TRUNCATION]], i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 7){{.*}}, !nosanitize
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
// CHECK-SANITIZE: [[CONT]]:
// CHECK-NEXT: ret i8 %[[DST]]
// CHECK-NEXT: }
#line 200
return src;
}
// CHECK-LABEL: @unsigned_int_to_signed_char
signed char unsigned_int_to_signed_char(unsigned int src) {
// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = sext i8 %[[DST]] to i32, !nosanitize
// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(ptr @[[LINE_300_SIGNED_TRUNCATION]], i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_300_SIGNED_TRUNCATION]], i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 7){{.*}}, !nosanitize
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
// CHECK-SANITIZE: [[CONT]]:
// CHECK-NEXT: ret i8 %[[DST]]
// CHECK-NEXT: }
#line 300
return src;
}
// CHECK-LABEL: @signed_int_to_signed_char
signed char signed_int_to_signed_char(signed int src) {
// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = sext i8 %[[DST]] to i32, !nosanitize
// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(ptr @[[LINE_400_SIGNED_TRUNCATION]], i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_400_SIGNED_TRUNCATION]], i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 7){{.*}}, !nosanitize
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
// CHECK-SANITIZE: [[CONT]]:
// CHECK-NEXT: ret i8 %[[DST]]
// CHECK-NEXT: }
#line 400
return src;
}
// ========================================================================== //
// Check canonical type stuff
// ========================================================================== //
typedef unsigned int uint32_t;
typedef unsigned char uint8_t;
// CHECK-LABEL: @uint32_to_uint8
uint8_t uint32_to_uint8(uint32_t src) {
// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = zext i8 %[[DST]] to i32, !nosanitize
// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(ptr @[[LINE_500_UNSIGNED_TRUNCATION]], i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(ptr @[[LINE_500_UNSIGNED_TRUNCATION]], i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 7){{.*}}, !nosanitize
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
// CHECK-SANITIZE: [[CONT]]:
// CHECK-NEXT: ret i8 %[[DST]]
// CHECK-NEXT: }
#line 500
return src;
}
// ========================================================================== //
// Check that explicit conversion does not interfere with implicit conversion
// ========================================================================== //
// These contain one implicit truncating conversion, and one explicit truncating conversion.
// We want to make sure that we still diagnose the implicit conversion.
// Implicit truncation after explicit truncation.
// CHECK-LABEL: @explicit_conversion_interference0
unsigned char explicit_conversion_interference0(unsigned int c) {
// CHECK-SANITIZE: %[[ANYEXT:.*]] = zext i8 %[[DST:.*]] to i16, !nosanitize
// CHECK-SANITIZE: call
return (unsigned short)c;
}
// Implicit truncation before explicit truncation.
// CHECK-LABEL: @explicit_conversion_interference1
unsigned char explicit_conversion_interference1(unsigned int c) {
// CHECK-SANITIZE: %[[ANYEXT:.*]] = zext i16 %[[DST:.*]] to i32, !nosanitize
// CHECK-SANITIZE: call
unsigned short b;
return (unsigned char)(b = c);
}
// ========================================================================== //
// The expected true-negatives.
// ========================================================================== //
// Sanitization is explicitly disabled.
// ========================================================================== //
// CHECK-LABEL: @ignorelist_0
__attribute__((no_sanitize("undefined"))) unsigned char ignorelist_0(unsigned int src) {
// We are not in "undefined" group, so that doesn't work.
// CHECK-SANITIZE: call
return src;
}
// CHECK-LABEL: @ignorelist_1
__attribute__((no_sanitize("integer"))) unsigned char ignorelist_1(unsigned int src) {
return src;
}
// CHECK-LABEL: @ignorelist_2
__attribute__((no_sanitize("implicit-conversion"))) unsigned char ignorelist_2(unsigned int src) {
return src;
}
// CHECK-LABEL: @ignorelist_3
__attribute__((no_sanitize("implicit-integer-truncation"))) unsigned char ignorelist_3(unsigned int src) {
return src;
}
// Explicit truncating conversions.
// ========================================================================== //
// CHECK-LABEL: @explicit_unsigned_int_to_unsigned_char
unsigned char explicit_unsigned_int_to_unsigned_char(unsigned int src) {
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_signed_int_to_unsigned_char
unsigned char explicit_signed_int_to_unsigned_char(signed int src) {
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_unsigned_int_to_signed_char
signed char explicit_unsigned_int_to_signed_char(unsigned int src) {
return (signed char)src;
}
// CHECK-LABEL: @explicit_signed_int_to_signed_char
signed char explicit_signed_int_to_signed_char(signed int src) {
return (signed char)src;
}
// Explicit NOP conversions.
// ========================================================================== //
// CHECK-LABEL: @explicit_unsigned_int_to_unsigned_int
unsigned int explicit_unsigned_int_to_unsigned_int(unsigned int src) {
return (unsigned int)src;
}
// CHECK-LABEL: @explicit_signed_int_to_signed_int
signed int explicit_signed_int_to_signed_int(signed int src) {
return (signed int)src;
}
// CHECK-LABEL: @explicit_unsigned_char_to_signed_char
unsigned char explicit_unsigned_char_to_signed_char(unsigned char src) {
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_signed_char_to_signed_char
signed char explicit_signed_char_to_signed_char(signed char src) {
return (signed char)src;
}
// upcasts.
// ========================================================================== //
// CHECK-LABEL: @unsigned_char_to_unsigned_int
unsigned int unsigned_char_to_unsigned_int(unsigned char src) {
return src;
}
// CHECK-LABEL: @signed_char_to_unsigned_int
unsigned int signed_char_to_unsigned_int(signed char src) {
return src;
}
// CHECK-LABEL: @unsigned_char_to_signed_int
signed int unsigned_char_to_signed_int(unsigned char src) {
return src;
}
// CHECK-LABEL: @signed_char_to_signed_int
signed int signed_char_to_signed_int(signed char src) {
return src;
}
// Explicit upcasts.
// ========================================================================== //
// CHECK-LABEL: @explicit_unsigned_char_to_unsigned_int
unsigned int explicit_unsigned_char_to_unsigned_int(unsigned char src) {
return (unsigned int)src;
}
// CHECK-LABEL: @explicit_signed_char_to_unsigned_int
unsigned int explicit_signed_char_to_unsigned_int(signed char src) {
return (unsigned int)src;
}
// CHECK-LABEL: @explicit_unsigned_char_to_signed_int
signed int explicit_unsigned_char_to_signed_int(unsigned char src) {
return (signed int)src;
}
// CHECK-LABEL: @explicit_signed_char_to_signed_int
signed int explicit_signed_char_to_signed_int(signed char src) {
return (signed int)src;
}
// conversions to to boolean type are not counted as truncation.
// ========================================================================== //
// CHECK-LABEL: @unsigned_int_to_bool
_Bool unsigned_int_to_bool(unsigned int src) {
return src;
}
// CHECK-LABEL: @signed_int_to_bool
_Bool signed_int_to_bool(signed int src) {
return src;
}
// CHECK-LABEL: @explicit_unsigned_int_to_bool
_Bool explicit_unsigned_int_to_bool(unsigned int src) {
return (_Bool)src;
}
// CHECK-LABEL: @explicit_signed_int_to_bool
_Bool explicit_signed_int_to_bool(signed int src) {
return (_Bool)src;
}
// Explicit truncating conversions from pointer to a much-smaller integer.
// Can not have an implicit conversion from pointer to an integer.
// Can not have an implicit conversion between two enums.
// ========================================================================== //
// CHECK-LABEL: @explicit_voidptr_to_unsigned_char
unsigned char explicit_voidptr_to_unsigned_char(void *src) {
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_voidptr_to_signed_char
signed char explicit_voidptr_to_signed_char(void *src) {
return (signed char)src;
}
// Implicit truncating conversions from floating-point may result in precision loss.
// ========================================================================== //
// CHECK-LABEL: @float_to_unsigned_int
unsigned int float_to_unsigned_int(float src) {
return src;
}
// CHECK-LABEL: @float_to_signed_int
signed int float_to_signed_int(float src) {
return src;
}
// CHECK-LABEL: @double_to_unsigned_int
unsigned int double_to_unsigned_int(double src) {
return src;
}
// CHECK-LABEL: @double_to_signed_int
signed int double_to_signed_int(double src) {
return src;
}
// Implicit truncating conversions between fp may result in precision loss.
// ========================================================================== //
// CHECK-LABEL: @double_to_float
float double_to_float(double src) {
return src;
}
Codebase Browser
llvm