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src/file_pyc.c: add Frama-C annotations

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This commit is contained in:
Christophe Grenier 2021-02-28 15:26:13 +01:00
parent 58139dcaca
commit 2cf9b58353
1 changed files with 14 additions and 1 deletions
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15
src/file_pyc.c
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@ -35,8 +35,8 @@
#include "common.h"
#include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_pyc(file_stat_t *file_stat);
static int header_check_pyc(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);
const file_hint_t file_hint_pyc= {
.extension="pyc",
@ -52,6 +52,17 @@ struct pyc_header {
uint32_t modtime;
};
/*@
@ requires buffer_size >= 12;
@ 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_pyc, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1;
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_pyc(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)
{
const struct pyc_header *pyc=(const struct pyc_header *)buffer;
@ -81,6 +92,7 @@ static void register_header_check_pyc(file_stat_t *file_stat)
static const unsigned char pyc_33_magic[4]= { 0x9e, 0x0c, '\r', '\n'};
static const unsigned char pyc_34_magic[4]= { 0xee, 0x0c, '\r', '\n'};
register_header_check(0, pyc_15_magic, sizeof(pyc_15_magic), &header_check_pyc, file_stat);
#ifndef __FRAMAC__
register_header_check(0, pyc_20_magic, sizeof(pyc_20_magic), &header_check_pyc, file_stat);
register_header_check(0, pyc_21_magic, sizeof(pyc_21_magic), &header_check_pyc, file_stat);
register_header_check(0, pyc_22_magic, sizeof(pyc_22_magic), &header_check_pyc, file_stat);
@ -94,5 +106,6 @@ static void register_header_check_pyc(file_stat_t *file_stat)
register_header_check(0, pyc_32_magic, sizeof(pyc_32_magic), &header_check_pyc, file_stat);
register_header_check(0, pyc_33_magic, sizeof(pyc_33_magic), &header_check_pyc, file_stat);
register_header_check(0, pyc_34_magic, sizeof(pyc_34_magic), &header_check_pyc, file_stat);
#endif
}
#endif