I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
385 lines
11 KiB
C
385 lines
11 KiB
C
/*
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* Copyright (c) 2014, 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* ubsan/ubsan.c
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* Undefined behavior sanitizer runtime support.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <scram.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifdef __is_sortix_libk
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#include <libk.h>
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#endif
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struct ubsan_source_location
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{
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const char* filename;
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uint32_t line;
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uint32_t column;
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};
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struct ubsan_type_descriptor
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{
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uint16_t type_kind;
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uint16_t type_info;
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char type_name[];
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};
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typedef uintptr_t ubsan_value_handle_t;
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static const struct ubsan_source_location unknown_location =
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{
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"<unknown file>",
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0,
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0,
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};
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__attribute__((noreturn))
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static void ubsan_abort(const struct ubsan_source_location* location,
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const char* violation)
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{
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if ( !location || !location->filename )
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location = &unknown_location;
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#ifdef __is_sortix_libk
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libk_ubsan_abort(violation, location->filename, location->line,
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location->column);
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#else
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struct scram_undefined_behavior info;
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info.filename = location->filename;
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info.line = location->line;
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info.column = location->column;
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info.violation = violation;
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scram(SCRAM_UNDEFINED_BEHAVIOR, &info);
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#endif
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}
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#define ABORT_VARIANT(name, params, call) \
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__attribute__((noreturn)) \
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void __ubsan_handle_##name##_abort params \
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{ \
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__ubsan_handle_##name call; \
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__builtin_unreachable(); \
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}
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#define ABORT_VARIANT_VP(name) \
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ABORT_VARIANT(name, (void* a), (a))
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#define ABORT_VARIANT_VP_VP(name) \
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ABORT_VARIANT(name, (void* a, void* b), (a, b))
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#define ABORT_VARIANT_VP_IP(name) \
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ABORT_VARIANT(name, (void* a, intptr_t b), (a, b))
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#define ABORT_VARIANT_VP_VP_VP(name) \
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ABORT_VARIANT(name, (void* a, void* b, void* c), (a, b, c))
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struct ubsan_type_mismatch_data
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{
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struct ubsan_source_location location;
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struct ubsan_type_descriptor* type;
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uintptr_t alignment;
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unsigned char type_check_kind;
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};
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void __ubsan_handle_type_mismatch(void* data_raw,
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void* pointer_raw)
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{
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struct ubsan_type_mismatch_data* data =
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(struct ubsan_type_mismatch_data*) data_raw;
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ubsan_value_handle_t pointer = (ubsan_value_handle_t) pointer_raw;
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const char* violation = "type mismatch";
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if ( !pointer )
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violation = "null pointer access";
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else if ( data->alignment && (pointer & (data->alignment - 1)) )
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violation = "unaligned access";
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ubsan_abort(&data->location, violation);
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}
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ABORT_VARIANT_VP_VP(type_mismatch);
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struct ubsan_overflow_data
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{
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struct ubsan_source_location location;
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struct ubsan_type_descriptor* type;
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};
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void __ubsan_handle_add_overflow(void* data_raw,
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void* lhs_raw,
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void* rhs_raw)
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{
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struct ubsan_overflow_data* data = (struct ubsan_overflow_data*) data_raw;
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ubsan_value_handle_t lhs = (ubsan_value_handle_t) lhs_raw;
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ubsan_value_handle_t rhs = (ubsan_value_handle_t) rhs_raw;
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(void) lhs;
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(void) rhs;
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ubsan_abort(&data->location, "addition overflow");
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}
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ABORT_VARIANT_VP_VP_VP(add_overflow);
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void __ubsan_handle_sub_overflow(void* data_raw,
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void* lhs_raw,
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void* rhs_raw)
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{
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struct ubsan_overflow_data* data = (struct ubsan_overflow_data*) data_raw;
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ubsan_value_handle_t lhs = (ubsan_value_handle_t) lhs_raw;
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ubsan_value_handle_t rhs = (ubsan_value_handle_t) rhs_raw;
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(void) lhs;
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(void) rhs;
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ubsan_abort(&data->location, "subtraction overflow");
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}
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ABORT_VARIANT_VP_VP_VP(sub_overflow);
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void __ubsan_handle_mul_overflow(void* data_raw,
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void* lhs_raw,
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void* rhs_raw)
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{
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struct ubsan_overflow_data* data = (struct ubsan_overflow_data*) data_raw;
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ubsan_value_handle_t lhs = (ubsan_value_handle_t) lhs_raw;
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ubsan_value_handle_t rhs = (ubsan_value_handle_t) rhs_raw;
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(void) lhs;
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(void) rhs;
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ubsan_abort(&data->location, "multiplication overflow");
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}
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ABORT_VARIANT_VP_VP_VP(mul_overflow);
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void __ubsan_handle_negate_overflow(void* data_raw,
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void* old_value_raw)
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{
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struct ubsan_overflow_data* data = (struct ubsan_overflow_data*) data_raw;
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ubsan_value_handle_t old_value = (ubsan_value_handle_t) old_value_raw;
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(void) old_value;
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ubsan_abort(&data->location, "negation overflow");
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}
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ABORT_VARIANT_VP_VP(negate_overflow);
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void __ubsan_handle_divrem_overflow(void* data_raw,
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void* lhs_raw,
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void* rhs_raw)
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{
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struct ubsan_overflow_data* data = (struct ubsan_overflow_data*) data_raw;
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ubsan_value_handle_t lhs = (ubsan_value_handle_t) lhs_raw;
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ubsan_value_handle_t rhs = (ubsan_value_handle_t) rhs_raw;
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(void) lhs;
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(void) rhs;
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ubsan_abort(&data->location, "division remainder overflow");
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}
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ABORT_VARIANT_VP_VP_VP(divrem_overflow);
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struct ubsan_shift_out_of_bounds_data
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{
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struct ubsan_source_location location;
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struct ubsan_type_descriptor* lhs_type;
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struct ubsan_type_descriptor* rhs_type;
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};
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void __ubsan_handle_shift_out_of_bounds(void* data_raw,
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void* lhs_raw,
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void* rhs_raw)
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{
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struct ubsan_shift_out_of_bounds_data* data =
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(struct ubsan_shift_out_of_bounds_data*) data_raw;
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ubsan_value_handle_t lhs = (ubsan_value_handle_t) lhs_raw;
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ubsan_value_handle_t rhs = (ubsan_value_handle_t) rhs_raw;
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(void) lhs;
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(void) rhs;
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ubsan_abort(&data->location, "shift out of bounds");
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}
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ABORT_VARIANT_VP_VP_VP(shift_out_of_bounds);
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struct ubsan_out_of_bounds_data
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{
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struct ubsan_source_location location;
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struct ubsan_type_descriptor* array_type;
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struct ubsan_type_descriptor* index_type;
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};
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void __ubsan_handle_out_of_bounds(void* data_raw,
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void* index_raw)
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{
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struct ubsan_out_of_bounds_data* data =
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(struct ubsan_out_of_bounds_data*) data_raw;
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ubsan_value_handle_t index = (ubsan_value_handle_t) index_raw;
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(void) index;
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ubsan_abort(&data->location, "out of bounds");
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}
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ABORT_VARIANT_VP_VP(out_of_bounds);
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struct ubsan_unreachable_data
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{
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struct ubsan_source_location location;
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};
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__attribute__((noreturn))
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void __ubsan_handle_builtin_unreachable(void* data_raw)
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{
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struct ubsan_unreachable_data* data =
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(struct ubsan_unreachable_data*) data_raw;
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ubsan_abort(&data->location, "reached unreachable");
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}
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__attribute__((noreturn))
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void __ubsan_handle_missing_return(void* data_raw)
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{
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struct ubsan_unreachable_data* data =
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(struct ubsan_unreachable_data*) data_raw;
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ubsan_abort(&data->location, "missing return");
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}
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struct ubsan_vla_bound_data
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{
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struct ubsan_source_location location;
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struct ubsan_type_descriptor* type;
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};
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void __ubsan_handle_vla_bound_not_positive(void* data_raw,
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void* bound_raw)
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{
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struct ubsan_vla_bound_data* data = (struct ubsan_vla_bound_data*) data_raw;
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ubsan_value_handle_t bound = (ubsan_value_handle_t) bound_raw;
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(void) bound;
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ubsan_abort(&data->location, "negative variable array length");
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}
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ABORT_VARIANT_VP_VP(vla_bound_not_positive);
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struct ubsan_float_cast_overflow_data
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{
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// TODO: Remove this GCC 5.x compatibility after switching to GCC 6.x. The
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// GCC developers accidentally forgot the source location. Their
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// libubsan probes to see if it looks like a path, but we don't need
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// to maintain compatibility with multiple gcc releases. See below.
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#if !(defined(__GNUC__) && __GNUC__< 6)
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struct ubsan_source_location location;
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#endif
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struct ubsan_type_descriptor* from_type;
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struct ubsan_type_descriptor* to_type;
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};
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void __ubsan_handle_float_cast_overflow(void* data_raw,
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void* from_raw)
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{
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struct ubsan_float_cast_overflow_data* data =
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(struct ubsan_float_cast_overflow_data*) data_raw;
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ubsan_value_handle_t from = (ubsan_value_handle_t) from_raw;
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(void) from;
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#if !(defined(__GNUC__) && __GNUC__< 6)
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ubsan_abort(&data->location, "float cast overflow");
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#else
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ubsan_abort(((void) data, &unknown_location), "float cast overflow");
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#endif
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}
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ABORT_VARIANT_VP_VP(float_cast_overflow);
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struct ubsan_invalid_value_data
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{
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struct ubsan_source_location location;
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struct ubsan_type_descriptor* type;
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};
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void __ubsan_handle_load_invalid_value(void* data_raw,
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void* value_raw)
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{
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struct ubsan_invalid_value_data* data =
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(struct ubsan_invalid_value_data*) data_raw;
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ubsan_value_handle_t value = (ubsan_value_handle_t) value_raw;
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(void) value;
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ubsan_abort(&data->location, "invalid value load");
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}
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ABORT_VARIANT_VP_VP(load_invalid_value);
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struct ubsan_function_type_mismatch_data
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{
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struct ubsan_source_location location;
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struct ubsan_type_descriptor* type;
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};
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void __ubsan_handle_function_type_mismatch(void* data_raw,
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void* value_raw)
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{
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struct ubsan_function_type_mismatch_data* data =
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(struct ubsan_function_type_mismatch_data*) data_raw;
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ubsan_value_handle_t value = (ubsan_value_handle_t) value_raw;
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(void) value;
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ubsan_abort(&data->location, "function type mismatch");
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}
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ABORT_VARIANT_VP_VP(function_type_mismatch);
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struct ubsan_nonnull_return_data
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{
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struct ubsan_source_location location;
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struct ubsan_source_location attr_location;
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};
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void __ubsan_handle_nonnull_return(void* data_raw)
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{
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struct ubsan_nonnull_return_data* data =
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(struct ubsan_nonnull_return_data*) data_raw;
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ubsan_abort(&data->location, "null return");
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}
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ABORT_VARIANT_VP(nonnull_return);
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struct ubsan_nonnull_arg_data
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{
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struct ubsan_source_location location;
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struct ubsan_source_location attr_location;
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};
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// TODO: GCC's libubsan does not have the second parameter, but its builtin
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// somehow has it and conflict if we don't match it.
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void __ubsan_handle_nonnull_arg(void* data_raw,
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intptr_t index_raw)
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{
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struct ubsan_nonnull_arg_data* data =
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(struct ubsan_nonnull_arg_data*) data_raw;
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ubsan_value_handle_t index = (ubsan_value_handle_t) index_raw;
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(void) index;
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ubsan_abort(&data->location, "null argument");
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}
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ABORT_VARIANT_VP_IP(nonnull_arg);
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struct ubsan_cfi_bad_icall_data
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{
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struct ubsan_source_location location;
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struct ubsan_type_descriptor* type;
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};
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void __ubsan_handle_cfi_bad_icall(void* data_raw,
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void* value_raw)
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{
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struct ubsan_cfi_bad_icall_data* data =
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(struct ubsan_cfi_bad_icall_data*) data_raw;
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ubsan_value_handle_t value = (ubsan_value_handle_t) value_raw;
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(void) value;
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ubsan_abort(&data->location,
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"control flow integrity check failure during indirect call");
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}
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ABORT_VARIANT_VP_VP(cfi_bad_icall);
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