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src/file_bkf.c: improve Frama-C annotations

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This commit is contained in:
Christophe Grenier 2021-06-06 14:50:07 +02:00
parent 999c134675
commit 6fbe9cab43
1 changed files with 6 additions and 31 deletions
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37
src/file_bkf.c
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@ -34,7 +34,7 @@
#include "log.h" #include "log.h"
/*@ /*@
@ requires \valid(file_stat); @ requires valid_register_header_check(file_stat);
@*/ @*/
static void register_header_check_bkf(file_stat_t *file_stat); static void register_header_check_bkf(file_stat_t *file_stat);
@ -67,18 +67,11 @@ struct mtf_db_hdr
} __attribute__ ((gcc_struct, __packed__)); } __attribute__ ((gcc_struct, __packed__));
/*@ /*@
@ requires \valid(file_recovery);
@ requires \valid(file_recovery->handle);
@ requires \valid_read(&file_recovery->extension);
@ requires valid_read_string(file_recovery->extension);
@ requires \separated(file_recovery, file_recovery->handle, file_recovery->extension, &errno, &Frama_C_entropy_source);
@ requires \initialized(&file_recovery->time);
@
@ requires file_recovery->file_check == &file_check_bkf; @ requires file_recovery->file_check == &file_check_bkf;
@ requires valid_file_check_param(file_recovery);
@ ensures valid_file_check_result(file_recovery);
@ assigns *file_recovery->handle, errno, file_recovery->file_size; @ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source; @ assigns Frama_C_entropy_source;
@
@ ensures \valid(file_recovery->handle);
@*/ @*/
static void file_check_bkf(file_recovery_t *file_recovery) static void file_check_bkf(file_recovery_t *file_recovery)
{ {
@ -87,35 +80,17 @@ static void file_check_bkf(file_recovery_t *file_recovery)
} }
/*@ /*@
@ requires buffer_size > 0;
@ requires \valid_read(buffer+(0..buffer_size-1));
@ requires \valid_read(file_recovery);
@ requires file_recovery->file_stat==\null || valid_read_string((char*)file_recovery->filename);
@ requires \valid(file_recovery_new);
@ requires file_recovery_new->blocksize > 0;
@
@ requires buffer_size >= sizeof(struct mtf_db_hdr); @ requires buffer_size >= sizeof(struct mtf_db_hdr);
@ requires separation: \separated(&file_hint_bkf, buffer+(..), file_recovery, file_recovery_new); @ requires separation: \separated(&file_hint_bkf, buffer+(..), file_recovery, file_recovery_new);
@ @ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1; @ ensures valid_header_check_result(\result, file_recovery_new);
@ ensures (\result == 1) ==> (file_recovery_new->file_stat == \null);
@ ensures (\result == 1) ==> (file_recovery_new->handle == \null);
@ ensures (\result == 1) ==> \initialized(&file_recovery_new->time);
@ ensures (\result == 1) ==> \initialized(&file_recovery_new->calculated_file_size);
@ ensures (\result == 1) ==> file_recovery_new->file_size == 0; @ ensures (\result == 1) ==> file_recovery_new->file_size == 0;
@ ensures (\result == 1) ==> \initialized(&file_recovery_new->min_filesize);
@ ensures (\result == 1) ==> (file_recovery_new->data_check == \null || \valid_function(file_recovery_new->data_check));
@ ensures (\result == 1) ==> (file_recovery_new->file_check == \null || \valid_function(file_recovery_new->file_check));
@ ensures (\result == 1) ==> (file_recovery_new->file_rename == \null || \valid_function(file_recovery_new->file_rename));
@ ensures (\result != 0) ==> file_recovery_new->extension != \null;
@ ensures (\result == 1) ==> (valid_read_string(file_recovery_new->extension));
@ ensures (\result == 1) ==> \separated(file_recovery_new, file_recovery_new->extension);
@
@ ensures (\result == 1) ==> (file_recovery_new->time == 0); @ ensures (\result == 1) ==> (file_recovery_new->time == 0);
@ ensures (\result == 1) ==> (file_recovery_new->calculated_file_size == 0); @ ensures (\result == 1) ==> (file_recovery_new->calculated_file_size == 0);
@ ensures (\result == 1) ==> (file_recovery_new->min_filesize == 52); @ ensures (\result == 1) ==> (file_recovery_new->min_filesize == 52);
@ ensures (\result == 1) ==> (file_recovery_new->extension == file_hint_bkf.extension); @ ensures (\result == 1) ==> (file_recovery_new->extension == file_hint_bkf.extension);
@ ensures (\result == 1) ==> (file_recovery_new->file_check == &file_check_bkf); @ ensures (\result == 1) ==> (file_recovery_new->file_check == &file_check_bkf);
@ assigns *file_recovery_new;
@*/ @*/
static int header_check_bkf(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new) static int header_check_bkf(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{ {