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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include "afl-fuzz.h"
#include "gramfuzz.h"
#ifdef _GNU_SOURCE
#undef _GNU_SOURCE
#endif
#define _GNU_SOURCE
#include <sys/mman.h>
/* Dynamic Array for adding to the input repr
* */
void initArray(Array *a, size_t initialSize) {
a->start = (terminal *)calloc(1, sizeof(terminal) * initialSize);
a->used = 0;
a->size = initialSize;
a->inputlen = 0;
}
void insertArray(Array *a, int state, char *symbol, size_t symbol_len,
int trigger_idx) {
// a->used is the number of used entries, because a->array[a->used++] updates
// a->used only *after* the array has been accessed. Therefore a->used can go
// up to a->size
terminal *term_ptr;
if (a->used == a->size) {
a->size = a->size * sizeof(terminal);
a->start = (terminal *)realloc(a->start, a->size * sizeof(terminal));
}
// Add the element
term_ptr = &a->start[a->used];
term_ptr->state = state;
term_ptr->symbol = symbol;
term_ptr->symbol_len = symbol_len;
term_ptr->trigger_idx = trigger_idx;
// Increment the pointer
a->used += 1;
a->inputlen += symbol_len;
}
void freeArray(Array *a) {
terminal *ptr;
for (int x = 0; x < a->used; x++) {
ptr = &a->start[x];
free(ptr);
}
a->start = NULL;
a->used = a->size = 0;
}
/* Dynamic array for adding indices of states/recursive features
* Source:
* https://stackoverflow.com/questions/3536153/c-dynamically-growing-array
*/
void initArrayIdx(IdxMap *a, size_t initialSize) {
a->array = (int *)malloc(initialSize * sizeof(int));
a->used = 0;
a->size = initialSize;
}
void insertArrayIdx(IdxMap *a, int idx) {
// a->used is the number of used entries, because a->array[a->used++] updates
// a->used only *after* the array has been accessed. Therefore a->used can go
// up to a->size
if (a->used == a->size) {
a->size *= 2;
a->array = (int *)realloc(a->array, a->size * sizeof(int));
}
a->array[a->used++] = idx;
}
void freeArrayIdx(IdxMap *a) {
free(a->array);
a->array = NULL;
a->used = a->size = 0;
}
/* Dynamic array for adding potential splice points
*/
void initArraySplice(SpliceCandArray *a, size_t initialSize) {
a->start = (SpliceCand *)malloc(initialSize * sizeof(SpliceCand));
a->used = 0;
a->size = initialSize;
}
void insertArraySplice(SpliceCandArray *a, Candidate *candidate, int idx) {
// a->used is the number of used entries, because a->array[a->used++] updates
// a->used only *after* the array has been accessed. Therefore a->used can go
// up to a->size
SpliceCand *candptr;
if (a->used == a->size) {
a->size = a->size * sizeof(SpliceCand);
a->start = (SpliceCand *)realloc(a->start, a->size * sizeof(SpliceCand));
}
// Add the element
candptr = &a->start[a->used];
candptr->splice_cand = candidate;
candptr->idx = idx;
a->used += 1;
}
void freeArraySplice(IdxMap *a) {
free(a->array);
a->array = NULL;
a->used = a->size = 0;
}
int fact(int n) {
int i, f = 1;
for (i = 1; i <= n; i++) {
f *= i;
}
return f;
}
/* Uses the walk to create the input in-memory */
u8 *unparse_walk(Array *input) {
terminal *term_ptr;
int offset = 0;
u8 * unparsed = (u8 *)malloc(input->inputlen + 1);
term_ptr = &input->start[offset];
strcpy(unparsed, term_ptr->symbol);
offset += 1;
while (offset < input->used) {
term_ptr = &input->start[offset];
strcat(unparsed, term_ptr->symbol);
offset += 1;
}
return unparsed;
}
/*Dump the input representation into a file*/
void write_input(Array *input, u8 *fn) {
FILE *fp;
// If file already exists, then skip creating the file
if (access(fn, F_OK) != -1) { return; }
fp = fopen(fn, "wbx+");
// If the input has already been flushed, then skip silently
if (fp == NULL) {
fprintf(stderr, "\n File '%s' could not be open, exiting\n", fn);
exit(1);
}
// Write the length parameters
fwrite(&input->used, sizeof(size_t), 1, fp);
fwrite(&input->size, sizeof(size_t), 1, fp);
fwrite(&input->inputlen, sizeof(size_t), 1, fp);
// Write the dynamic array to file
fwrite(input->start, input->size * sizeof(terminal), 1, fp);
// printf("\nUsed:%zu Size:%zu Inputlen:%zu", input->used, input->size,
// input->inputlen);
fclose(fp);
}
Array *parse_input(state *pda, FILE *fp) {
terminal *term;
state * state_ptr;
trigger * trigger;
int trigger_idx;
Array * input = (Array *)calloc(1, sizeof(Array));
// Read the length parameters
fread(&input->used, sizeof(size_t), 1, fp);
fread(&input->size, sizeof(size_t), 1, fp);
fread(&input->inputlen, sizeof(size_t), 1, fp);
terminal *start_ptr = (terminal *)calloc(input->size, sizeof(terminal));
if (!start_ptr) {
fprintf(stderr, "alloc failed!\n");
return NULL;
}
// Read the dynamic array to memory
fread(start_ptr, input->size * sizeof(terminal), 1, fp);
// Update the pointers to the terminals since they would have
// changed
int idx = 0;
while (idx < input->used) {
terminal *term = &start_ptr[idx];
// Find the state
state_ptr = pda + term->state;
// Find the trigger and update the terminal address
trigger_idx = term->trigger_idx;
trigger = (state_ptr->ptr) + trigger_idx;
term->symbol = trigger->term;
idx += 1;
}
input->start = start_ptr;
// printf("\nUsed:%zu Size:%zu Inputlen:%zu", input->used, input->size,
// input->inputlen);
return input;
}
// Read the input representation into memory
Array *read_input(state *pda, u8 *fn) {
FILE *fp;
fp = fopen(fn, "rb");
if (fp == NULL) {
fprintf(stderr, "\n File '%s' does not exist, exiting\n", fn);
exit(1);
}
Array *res = parse_input(pda, fp);
fclose(fp);
return res;
}
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