131 lines
3.7 KiB
C++
131 lines
3.7 KiB
C++
#include <kernel/Debug.h>
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#include <kernel/Panic.h>
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extern "C"
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{
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struct source_location
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{
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const char *file;
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uint32_t line;
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uint32_t column;
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};
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struct type_descriptor
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{
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uint16_t kind;
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uint16_t info;
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char name[1];
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};
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struct type_mismatch_data
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{
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source_location location;
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const type_descriptor& type;
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uint8_t alignment;
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uint8_t type_check_kind;
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};
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struct out_of_bounds_data
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{
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source_location location;
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const type_descriptor& left_type;
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const type_descriptor& right_type;
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};
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struct shift_out_of_bounds_data
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{
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source_location location;
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const type_descriptor& left_type;
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const type_descriptor& right_type;
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};
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struct pointer_overflow_data
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{
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source_location location;
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};
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struct invalid_value_data
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{
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source_location location;
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const type_descriptor& type;
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};
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struct overflow_data
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{
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source_location location;
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const type_descriptor& type;
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};
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struct vla_bound_data
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{
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source_location location;
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const type_descriptor& type;
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};
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enum builtin_check_kind : unsigned char
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{
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BCK_CTZPassedZero,
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BCK_CLZPassedZero,
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};
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struct invalid_builtin_data
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{
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source_location location;
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builtin_check_kind kind;
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};
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using value_handle = uintptr_t;
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static const char* type_check_kinds[] = {
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"load of", "store to", "reference binding to", "member access within",
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"member call on", "constructor call on", "downcast of", "downcast of",
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"upcast of", "cast to virtual base of", "_Nonnull binding to",
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"dynamic operation on"
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};
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#define HANDLER(handler, fatal, ...) \
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void handler(__VA_ARGS__) \
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{ \
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if constexpr(fatal) \
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Kernel::panic("{}:{} {}", data->location.file, data->location.line, __FUNCTION__); \
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else \
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derrorln("{}:{} {}", data->location.file, data->location.line, __FUNCTION__); \
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}
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static void print_location_impl(const source_location& location, const char* function)
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{
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derrorln("{}:{} {}", location.file, location.line, function);
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}
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#define print_location(location) print_location_impl(location, __FUNCTION__)
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HANDLER(__ubsan_handle_pointer_overflow, false, pointer_overflow_data* data, value_handle, value_handle)
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HANDLER(__ubsan_handle_load_invalid_value, false, invalid_value_data* data, value_handle)
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HANDLER(__ubsan_handle_out_of_bounds, false, out_of_bounds_data* data, value_handle)
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HANDLER(__ubsan_handle_shift_out_of_bounds, false, shift_out_of_bounds_data* data, value_handle, value_handle)
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HANDLER(__ubsan_handle_add_overflow, false, overflow_data* data, value_handle, value_handle)
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HANDLER(__ubsan_handle_sub_overflow, false, overflow_data* data, value_handle, value_handle)
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HANDLER(__ubsan_handle_mul_overflow, false, overflow_data* data, value_handle, value_handle)
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HANDLER(__ubsan_handle_divrem_overflow, false, overflow_data* data, value_handle, value_handle)
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HANDLER(__ubsan_handle_negate_overflow, false, overflow_data* data, value_handle)
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HANDLER(__ubsan_handle_vla_bound_not_positive, false, vla_bound_data* data, value_handle);
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HANDLER(__ubsan_handle_invalid_builtin, false, invalid_builtin_data* data);
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void __ubsan_handle_type_mismatch_v1(type_mismatch_data* data, value_handle pointer)
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{
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print_location(data->location);
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const char* kind = type_check_kinds[data->type_check_kind];
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uintptr_t alignment = (uintptr_t)1 << data->alignment;
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if (!pointer)
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derrorln("{} null pointer of type {}", kind, data->type.name);
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else if (pointer & (alignment - 1))
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derrorln("{} misaligned address {} for type {}, which requires {} byte alignment", kind, (void*)pointer, data->type.name, alignment);
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else
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derrorln("{} address {} with insufficient space for an object of type {}", kind, (void*)pointer, data->type.name);
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}
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}
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