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src/file_che.c: add frama-c annotations

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This commit is contained in:
Christophe Grenier 2021-02-14 15:15:37 +01:00
parent b2a103f696
commit 183f6b2162
1 changed files with 28 additions and 0 deletions
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28
src/file_che.c
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@ -33,6 +33,7 @@
#include "common.h"
#include "log.h"
/*@ requires \valid(file_stat); */
static void register_header_check_che(file_stat_t *file_stat);
const file_hint_t file_hint_che= {
@ -53,6 +54,18 @@ struct che_block
} __attribute__ ((gcc_struct, __packed__));
/*@
@ requires valid_file_recovery(file_recovery);
@ requires \valid(file_recovery->handle);
@ 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_che;
@ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source;
@
@ ensures \valid(file_recovery->handle);
@*/
static void file_check_che(file_recovery_t *file_recovery)
{
struct che_block block;
@ -60,6 +73,10 @@ static void file_check_che(file_recovery_t *file_recovery)
uint64_t new_offset=0x19;
const uint64_t file_size_org=file_recovery->file_size;
file_recovery->file_size=0;
/*@
@ loop assigns *file_recovery->handle, errno, file_recovery->file_size;
@ loop assigns Frama_C_entropy_source;
@*/
do
{
offset=new_offset;
@ -85,6 +102,17 @@ static void file_check_che(file_recovery_t *file_recovery)
file_recovery->file_size=offset;
}
/*@
@ requires buffer_size > 0;
@ requires \valid_read(buffer+(0..buffer_size-1));
@ requires valid_file_recovery(file_recovery);
@ requires \valid(file_recovery_new);
@ requires file_recovery_new->blocksize > 0;
@ requires separation: \separated(&file_hint_che, buffer+(..), file_recovery, file_recovery_new);
@ assigns *file_recovery_new;
@ ensures \result == 0 || \result == 1;
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@*/
static int header_check_che(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)
{
reset_file_recovery(file_recovery_new);