esp-idf/components/esp_system/ubsan.c

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// Copyright (c) 2016, Linaro Limited
// Modified for HelenOS use by Jiří Zárevúcky.
// Adaptations for ESP-IDF Copyright (c) 2020 Espressif Systems (Shanghai) Co. Ltd.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#include <stdbool.h>
#include <inttypes.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include "esp_system.h"
#include "esp_rom_sys.h"
#include "hal/cpu_hal.h"
struct source_location {
const char *file_name;
uint32_t line;
uint32_t column;
};
struct type_descriptor {
uint16_t type_kind;
uint16_t type_info;
char type_name[];
};
struct type_mismatch_data {
struct source_location loc;
struct type_descriptor *type;
unsigned long alignment;
unsigned char type_check_kind;
};
struct type_mismatch_data_v1 {
struct source_location loc;
struct type_descriptor *type;
unsigned char log_alignment;
unsigned char type_check_kind;
};
struct overflow_data {
struct source_location loc;
struct type_descriptor *type;
};
struct shift_out_of_bounds_data {
struct source_location loc;
struct type_descriptor *lhs_type;
struct type_descriptor *rhs_type;
};
struct out_of_bounds_data {
struct source_location loc;
struct type_descriptor *array_type;
struct type_descriptor *index_type;
};
struct unreachable_data {
struct source_location loc;
};
struct vla_bound_data {
struct source_location loc;
struct type_descriptor *type;
};
struct invalid_value_data {
struct source_location loc;
struct type_descriptor *type;
};
struct nonnull_arg_data {
struct source_location loc;
};
struct nonnull_return_data {
struct source_location loc;
struct source_location attr_loc;
};
struct pointer_overflow_data {
struct source_location loc;
};
struct invalid_builtin_data {
struct source_location loc;
unsigned char kind;
};
static void __ubsan_default_handler(struct source_location *loc, const char *func) __attribute__((noreturn));
/*
* When compiling with -fsanitize=undefined the compiler expects functions
* with the following signatures. The functions are never called directly,
* only when undefined behavior is detected in instrumented code.
*/
void __ubsan_handle_type_mismatch(struct type_mismatch_data *data, unsigned long ptr);
void __ubsan_handle_type_mismatch_v1(struct type_mismatch_data_v1 *data, unsigned long ptr);
void __ubsan_handle_add_overflow(struct overflow_data *data, unsigned long lhs, unsigned long rhs);
void __ubsan_handle_sub_overflow(struct overflow_data *data, unsigned long lhs, unsigned long rhs);
void __ubsan_handle_mul_overflow(struct overflow_data *data, unsigned long lhs, unsigned long rhs);
void __ubsan_handle_negate_overflow(struct overflow_data *data, unsigned long old_val);
void __ubsan_handle_divrem_overflow(struct overflow_data *data, unsigned long lhs, unsigned long rhs);
void __ubsan_handle_shift_out_of_bounds(struct shift_out_of_bounds_data *data, unsigned long lhs, unsigned long rhs);
void __ubsan_handle_out_of_bounds(struct out_of_bounds_data *data, unsigned long idx);
void __ubsan_handle_missing_return(struct unreachable_data *data);
void __ubsan_handle_vla_bound_not_positive(struct vla_bound_data *data, unsigned long bound);
void __ubsan_handle_load_invalid_value(struct invalid_value_data *data, unsigned long val);
void __ubsan_handle_nonnull_arg(struct nonnull_arg_data *data);
void __ubsan_handle_nonnull_return(struct nonnull_return_data *data);
void __ubsan_handle_builtin_unreachable(struct unreachable_data *data);
void __ubsan_handle_pointer_overflow(struct pointer_overflow_data *data,
unsigned long base, unsigned long result);
static void __ubsan_maybe_debugbreak(void)
{
if (cpu_hal_is_debugger_attached()) {
cpu_hal_break();
}
}
static void __ubsan_default_handler(struct source_location *loc, const char *func)
{
/* Although the source location is available here, it is not printed:
*
* - We could use "snprintf", but that uses a lot of stack, and may allocate memory,
* so is not safe from UBSAN handler.
* - Alternatively, "itoa" could be used. However itoa doesn't take the remaining
* string length as as argument and is therefore unsafe (nor does it return
* the number of characters written). itoa is also not present in ESP32-S2 ROM,
* and would need to be placed into IRAM on that chip.
* - Third option is to print the message using esp_rom_printf, and not pass anything
* to esp_system_abort. However we'd like to capture this information, e.g. for the
* purpose of including the abort reason into core dumps.
*
* Since the source file and line number are already printed while decoding
* the panic backtrace, not printing the line number here seems to be an okay choice.
*/
char msg[60] = {};
(void) strlcat(msg, "Undefined behavior of type ", sizeof(msg));
(void) strlcat(msg, func + strlen("__ubsan_handle_"), sizeof(msg));
esp_system_abort(msg);
}
void __ubsan_handle_type_mismatch(struct type_mismatch_data *data,
unsigned long ptr)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_type_mismatch_v1(struct type_mismatch_data_v1 *data,
unsigned long ptr)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_add_overflow(struct overflow_data *data,
unsigned long lhs,
unsigned long rhs)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_sub_overflow(struct overflow_data *data,
unsigned long lhs,
unsigned long rhs)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_mul_overflow(struct overflow_data *data,
unsigned long lhs,
unsigned long rhs)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_negate_overflow(struct overflow_data *data,
unsigned long old_val)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_divrem_overflow(struct overflow_data *data,
unsigned long lhs,
unsigned long rhs)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_shift_out_of_bounds(struct shift_out_of_bounds_data *data,
unsigned long lhs,
unsigned long rhs)
{
if (rhs == 32) {
return;
}
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_out_of_bounds(struct out_of_bounds_data *data,
unsigned long idx)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_missing_return(struct unreachable_data *data)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_vla_bound_not_positive(struct vla_bound_data *data,
unsigned long bound)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_load_invalid_value(struct invalid_value_data *data,
unsigned long val)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_nonnull_arg(struct nonnull_arg_data *data)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_nonnull_return(struct nonnull_return_data *data)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_builtin_unreachable(struct unreachable_data *data)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_pointer_overflow(struct pointer_overflow_data *data,
unsigned long base, unsigned long result)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
void __ubsan_handle_invalid_builtin(struct invalid_builtin_data *data)
{
__ubsan_maybe_debugbreak();
__ubsan_default_handler(&data->loc, __func__);
}
/* Hook for the linker to include this object file */
void __ubsan_include(void)
{
}