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//===-- intrinsics.c ------------------------------------------------------===//
//
// The KLEE Symbolic Virtual Machine
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/* Straight C for linking simplicity */
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <time.h>
#include "klee/klee.h"
#include "klee/Internal/ADT/BOut.h"
static BOut *testData = 0;
static unsigned testPosition = 0;
static unsigned char rand_byte(void) {
unsigned x = rand();
x ^= x>>16;
x ^= x>>8;
return x & 0xFF;
}
void klee_make_symbolic_name(void *array, unsigned nbytes, const char *name) {
static int rand_init = -1;
if (rand_init == -1) {
if (getenv("KLEE_RANDOM")) {
struct timeval tv;
gettimeofday(&tv, 0);
rand_init = 1;
srand(tv.tv_sec ^ tv.tv_usec);
} else {
rand_init = 0;
}
}
if (rand_init) {
if (!strcmp(name,"syscall_a0")) {
unsigned long long *v = array;
assert(nbytes == 8);
*v = rand() % 69;
} else {
char *c = array;
unsigned i;
for (i=0; i<nbytes; i++)
c[i] = rand_byte();
}
return;
}
if (!testData) {
char tmp[256];
char *name = getenv("KLEE_RUNTEST");
if (!name) {
fprintf(stdout, "KLEE-RUNTIME: KLEE_RUNTEST not set, please enter .bout path: ");
fflush(stdout);
name = tmp;
if (!fgets(tmp, sizeof tmp, stdin) || !strlen(tmp)) {
fprintf(stderr, "KLEE-RUNTIME: cannot replay, no KLEE_RUNTEST or user input\n");
exit(1);
}
tmp[strlen(tmp)-1] = '\0'; /* kill newline */
}
testData = bOut_fromFile(name);
if (!testData) {
fprintf(stderr, "KLEE-RUNTIME: unable to open .bout file\n");
exit(1);
}
}
if (testPosition >= testData->numObjects) {
fprintf(stderr, "ERROR: out of inputs, using zero\n");
memset(array, 0, nbytes);
} else {
BOutObject *o = &testData->objects[testPosition++];
memcpy(array, o->bytes, nbytes<o->numBytes ? nbytes : o->numBytes);
if (nbytes != o->numBytes) {
fprintf(stderr, "ERROR: object sizes differ\n");
if (o->numBytes < nbytes)
memset((char*) array + o->numBytes, 0, nbytes - o->numBytes);
}
}
}
void klee_make_symbolic(void *array, unsigned nbytes) {
klee_make_symbolic_name(array, nbytes, "unnamed");
}
void *klee_malloc_n(unsigned nelems, unsigned size, unsigned alignment) {
#if 1
return mmap((void*) 0x90000000, nelems*size, PROT_READ|PROT_WRITE,
MAP_PRIVATE
#ifdef MAP_ANONYMOUS
|MAP_ANONYMOUS
#endif
, 0, 0);
#else
char *buffer = malloc(nelems*size + alignment - 1);
buffer += (alignment - (long)buffer % alignment);
return buffer;
#endif
}
void klee_silent_exit(int x) {
exit(x);
}
unsigned klee_choose(unsigned n) {
unsigned x;
klee_make_symbolic(&x, sizeof x);
if(x >= n)
fprintf(stderr, "ERROR: max = %d, got = %d\n", n, x);
assert(x < n);
return x;
}
void klee_assume(unsigned x) {
if (!x) {
fprintf(stderr, "ERROR: invalid klee_assume\n");
}
}
unsigned klee_get_value(unsigned x) {
return x;
}
int klee_range_name(int begin, int end, const char* name) {
int x;
klee_make_symbolic_name(&x, sizeof x, name);
if (x<begin || x>=end) {
fprintf(stderr,
"KLEE: ERROR: invalid klee_range(%u,%u,%s) value, got: %u\n",
begin, end, name, x);
abort();
}
return x;
}
/* not sure we should even define. is for debugging. */
void klee_print_expr(const char *msg, ...) { }
void klee_set_forking(unsigned enable) { }
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