Quellcode-Bibliothek ubsan.h
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/*
* Copyright (c) 2019 Google Inc. All rights reserved
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* LLVM UBSan handler signatures and data structures.
*
* Clang's headers for this are C++, so we cannot use them directly.
* This ia a C-styled rewrite.
* See LLVM's ubsan_handlers.h for reference.
*/
#pragma once
#include <stdint.h>
#include "ubsan_value.h"
const char* type_check_kinds[] = {"load of",
"store to",
"reference binding to",
"member access within",
"member call on",
"constructor call on",
"downcast of",
"downcast of",
"upcast of",
"cast to virtual base of",
"_Nonnull binding to",
"dynamic operation on"};
struct type_mismatch_data {
struct source_location loc;
const struct type_descriptor* type;
uint8_t log_alignment;
uint8_t type_check_kind;
};
struct alignment_assumption_data {
struct source_location loc;
struct source_location assumption_loc;
const struct type_descriptor* type;
};
struct overflow_data {
struct source_location loc;
const struct type_descriptor* type;
};
struct shift_out_of_bounds_data {
struct source_location loc;
const struct type_descriptor* lhs_type;
const struct type_descriptor* rhs_type;
};
struct out_of_bounds_data {
struct source_location loc;
const struct type_descriptor* array_type;
const struct type_descriptor* index_type;
};
struct unreachable_data {
struct source_location loc;
};
struct vla_bound_data {
struct source_location loc;
const struct type_descriptor* type;
};
struct float_cast_overflow_data {
struct source_location loc;
const struct type_descriptor* from_type;
const struct type_descriptor* to_type;
};
struct invalid_value_data {
struct source_location loc;
const struct type_descriptor* type;
};
enum implicit_conversion_check_kind {
ICK_LEGACY_TRUNC = 0,
ICK_UNSIGNED_TRUNC = 1,
ICK_SIGNED_TRUNC = 2,
ICK_SIGN_CHANGE = 3,
ICK_SIGNED_TRUNC_OR_SIGN_CHANGE = 4,
};
static const char* implicit_conversion_check_kinds[] = {
"legacy truncation",
"unsigned truncation",
"signed truncation",
"sign change",
"signed truncation or sign change",
};
struct implicit_conversion_data {
struct source_location loc;
const struct type_descriptor* from_type;
const struct type_descriptor* to_type;
uint8_t check_kind;
};
enum builtin_check_kind {
BCK_CTZ_PASSED_ZERO = 0,
BCK_CLZ_PASSED_ZERO = 1,
};
struct invalid_builtin_data {
struct source_location loc;
uint8_t check_kind;
};
struct function_type_mismatch_data {
struct source_location loc;
const struct type_descriptor* type;
};
struct non_null_return_data {
struct source_location attr_loc;
};
struct non_null_arg_data {
struct source_location loc;
struct source_location attr_loc;
int arg_index;
};
struct pointer_overflow_data {
struct source_location loc;
};
enum cfi_type_check_kind {
CFI_TCK_VCALL,
CFI_TCK_NVCALL,
CFI_TCK_DERIVED_CAST,
CFI_TCK_UNRELATED_CAST,
CFI_TCK_ICALL,
CFI_TCK_NVMFCALL,
CFI_TCK_VMFCALL
};
struct cfi_check_fail_data {
uint8_t check_kind;
struct source_location loc;
const struct type_descriptor* type;
};
#define UBSAN_HANDLER(checkname, ...) \
__attribute__((noinline)) void __ubsan_handle_##checkname(__VA_ARGS__)
UBSAN_HANDLER(type_mismatch,
struct type_mismatch_data* data,
value_handle_t val);
UBSAN_HANDLER(alignment_assumption,
struct alignment_assumption_data* data,
value_handle_t val,
value_handle_t alignment,
value_handle_t offset);
UBSAN_HANDLER(add_overflow,
struct overflow_data* data,
value_handle_t lhs,
value_handle_t rhs);
UBSAN_HANDLER(sub_overflow,
struct overflow_data* data,
value_handle_t lhs,
value_handle_t rhs);
UBSAN_HANDLER(mul_overflow,
struct overflow_data* data,
value_handle_t lhs,
value_handle_t rhs);
UBSAN_HANDLER(negate_overflow, struct overflow_data* data, value_handle_t val);
UBSAN_HANDLER(divrem_overflow,
struct overflow_data* data,
value_handle_t lhs,
value_handle_t rhs);
UBSAN_HANDLER(shift_out_of_bounds,
struct shift_out_of_bounds_data* data,
value_handle_t lhs,
value_handle_t rhs);
UBSAN_HANDLER(out_of_bounds,
struct out_of_bounds_data* data,
value_handle_t index);
UBSAN_HANDLER(builtin_unreachable, struct unreachable_data* data);
UBSAN_HANDLER(missing_return, struct unreachable_data* data);
UBSAN_HANDLER(vla_bound_not_positive,
struct vla_bound_data* data,
value_handle_t bound);
UBSAN_HANDLER(float_cast_overflow,
struct float_cast_overflow_data* data,
value_handle_t from);
UBSAN_HANDLER(load_invalid_value,
struct invalid_value_data* data,
value_handle_t val);
UBSAN_HANDLER(implicit_conversion,
struct implicit_conversion_data* data,
value_handle_t src,
value_handle_t dst);
UBSAN_HANDLER(invalid_builtin, struct invalid_builtin_data* data);
UBSAN_HANDLER(function_type_mismatch,
struct function_type_mismatch_data* data,
value_handle_t val);
UBSAN_HANDLER(nonnull_return_v1,
struct non_null_return_data* data,
struct source_location loc);
UBSAN_HANDLER(nullability_return_v1,
struct non_null_return_data* data,
struct source_location loc);
UBSAN_HANDLER(nonnull_arg, struct non_null_arg_data* data);
UBSAN_HANDLER(nullability_arg, struct non_null_arg_data* data);
UBSAN_HANDLER(pointer_overflow,
struct pointer_overflow_data* data,
value_handle_t base,
value_handle_t result);
UBSAN_HANDLER(cfi_check_fail,
struct cfi_check_fail_data* data,
value_handle_t func,
uintptr_t vtable_is_valid);
UBSAN_HANDLER(cfi_check_fail_abort,
struct cfi_check_fail_data* data,
value_handle_t func,
uintptr_t vtable_is_valid);
UBSAN_HANDLER(vla_bound_not_positive,
struct vla_bound_data* data,
value_handle_t val);
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[0.14QuellennavigatorsProjekt 2026-06-27]
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2026-08-25
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