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Update zend_witcher_trace.c #5

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107 changes: 107 additions & 0 deletions php8/Zend/zend_witcher_trace.c
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Original file line number Diff line number Diff line change
Expand Up @@ -535,6 +535,8 @@ unsigned char *cgi_get_shm_mem(char * ch_shm_id) {
* The witcher init, is needed at the start of the script and is only executed once per child
* it sets up the tracing enviornment
*/


void witcher_cgi_trace_init(char * ch_shm_id) {
debug_print(("[\e[32mWitcher\e[0m] in Witcher trace\n\t\e[34mSCRIPT_FILENAME=%s\n\t\e[34mAFL_PRELOAD=%s\n\t\e[34mLD_LIBRARY_PATH=%s\e[0m\n", getenv("SCRIPT_FILENAME"), getenv("AFL_PRELOAD"), getenv("LD_LIBRARY_PATH"), getenv("LOGIN_COOKIE")));

Expand Down Expand Up @@ -609,7 +611,51 @@ void witcher_cgi_trace_finish()

}

/*
void vld_start_trace(){
if (getenv("WITCHER_PRINT_OP")){
char tracefn[50];
sprintf(tracefn, "/tmp/trace-%s.dat", getenv("WITCHER_PRINT_OP"));
FILE *ofile = fopen(tracefn, "w");
fclose(ofile);
}
}

void vld_external_trace(zend_execute_data *execute_data, const zend_op *opline){
FILE *ofile = NULL;

if (witcher_print_op){
const char *opname = zend_get_opcode_name(opline->opcode);
char tracefn[50];
sprintf(tracefn, "/tmp/trace-%s.dat", witcher_print_op);
ofile = fopen(tracefn, "a");
debug_print(("%d] %s (%d) %d %d \n",opline->lineno, opname, opline->opcode, opline->op1_type, opline->op2_type));
fprintf(ofile, "%d] %s (%d) %d %d \n",opline->lineno, opname, opline->opcode, opline->op1_type, opline->op2_type);
}

if (start_tracing) {

op = (opline->lineno << 8) | opline->opcode ; //opcode; //| (lineno << 8);

if (last != 0) {
int bitmapLoc = (op ^ last) % MAPSIZE;

// turned off to disable afl code tracing
afl_area_ptr[bitmapLoc]++;
}
}
last = op;

if (ofile){
fflush(ofile);
fclose(ofile);
}
}
*/
/*
void vld_start_trace(){
printf("vld_start_trace()\n");

if (getenv("WITCHER_PRINT_OP")){
char tracefn[50];
sprintf(tracefn, "/tmp/trace-%s.dat", getenv("WITCHER_PRINT_OP"));
Expand All @@ -619,6 +665,7 @@ void vld_start_trace(){
}

void vld_external_trace(zend_execute_data *execute_data, const zend_op *opline){
printf("vld_external_trace()\n");
FILE *ofile = NULL;

if (witcher_print_op){
Expand Down Expand Up @@ -648,3 +695,63 @@ void vld_external_trace(zend_execute_data *execute_data, const zend_op *opline){
fclose(ofile);
}
}
*/


#define str_witcher_print_op "tracetest"
static bool trace_run = false;

void vld_start_trace()
{
if (getenv("START_TRACE"))
trace_run = true;

printf("vld_start_trace()\n");

if (afl_area_ptr == NULL)
{
if (getenv(SHM_ENV_VAR))
{
int shm_id = atoi(getenv(SHM_ENV_VAR));
afl_area_ptr = shmat(shm_id, NULL, 0);
}
}

char tracefn[50];
sprintf(tracefn, "/tmp/trace-%s.dat", str_witcher_print_op);
FILE *ofile = fopen(tracefn, "w");
fclose(ofile);
}

void vld_external_trace(zend_execute_data *execute_data, const zend_op *opline)
{
if (trace_run == true)
{
printf("vld_external_trace()\n");

FILE *ofile = NULL;

const char *opname = zend_get_opcode_name(opline->opcode);
char tracefn[50];
sprintf(tracefn, "/tmp/trace-%s.dat", str_witcher_print_op);
ofile = fopen(tracefn, "a");
debug_print(("%d] %s (%d) %d %d \n", opline->lineno, opname, opline->opcode, opline->op1_type, opline->op2_type));
fprintf(ofile, "%d] %s (%d) %d %d \n", opline->lineno, opname, opline->opcode, opline->op1_type, opline->op2_type);

op = (opline->lineno << 8) | opline->opcode; // opcode; //| (lineno << 8);

int bitmapLoc = (op ^ last) % MAPSIZE;
printf("bitmapLoc : %x \n", bitmapLoc);

if (afl_area_ptr != NULL)
afl_area_ptr[bitmapLoc]++;

last = op;

if (ofile)
{
fflush(ofile);
fclose(ofile);
}
}
}