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Adding Features to malloc_playground remade #192

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Adding Features to malloc_playground remade #192

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c4c4ae4
Add features to malloc playground
lafreuxpabo Apr 9, 2024
20c6c95
Removed Junks
lafreuxpabo Apr 9, 2024
203a4e6
Corrected misimplementation of listp and listpall
lafreuxpabo Jun 5, 2024
07a9b6c
Corrected free to remove size in sizeTable
lafreuxpabo Jun 5, 2024
ec918ea
Added clear of sizeTable in clearlist
lafreuxpabo Jun 5, 2024
5a082a4
Corrected Bugs
lafreuxpabo Jun 5, 2024
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121 changes: 104 additions & 17 deletions malloc_playground.c
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Original file line number Diff line number Diff line change
Expand Up @@ -21,38 +21,124 @@ void report_mcheck_fail(enum mcheck_status s)
}
#endif

int main(int argc, char ** argv) {

fprintf(stderr, "pid: %d\n", getpid());
#define MAX_PTR_NUM 20;

char **ptrArray;

int main(int argc, char ** argv) {
int num;
int ptrNumber = -1;
int maxPtr = MAX_PTR_NUM;
int sizeArg;
char sizeTable[maxPtr];

char buffer[1000];
char cmd[1000];
char arg1[100];
char arg2[100];

memset(sizeTable, 0, maxPtr);
memset(cmd, 0, 1000);
memset(arg1, 0, 100);
memset(arg2, 0, 100);

fprintf(stderr, "pid: %d\n", getpid());
ptrArray = malloc(sizeof(char*) * 20);
for (int i = 0; i < maxPtr; i++){
ptrArray[i] = 0;
}
while (1) {
fprintf(stderr, "> ");
fgets(buffer, sizeof(buffer), stdin);
char cmd[1000];
intptr_t arg1, arg2;
int num = sscanf(buffer, "%s %"SCNiPTR" %"SCNiPTR, cmd, &arg1, &arg2);
num = sscanf(buffer, "%s %s %s\n", cmd, arg1, arg2);
if (strcmp(cmd, "malloc") == 0) {
void* result = malloc(arg1);
fprintf(stderr, "==> %p\n", result);
if (ptrNumber < maxPtr){
sizeArg = atoi((const char *) &arg1);
void *result = malloc(sizeArg);
ptrNumber++;
sizeTable[ptrNumber] = sizeArg;
ptrArray[ptrNumber] = result;
strcpy(result, "none");
fprintf(stderr, "==> OK, %p\n", result);
}
else{
printf("Max pointer reached, free or restart");
}
} else if (strcmp(cmd, "free") == 0) {
free((void*) arg1);
fprintf(stderr, "==> ok\n");
} else if (strcmp(cmd, "show") == 0) {
if (num == 2) {
arg2 = 1;
if (ptrNumber > -1){
if (num == 1){
free((void*) ptrArray[ptrNumber]);
ptrArray[ptrNumber] = 0;
sizeTable[ptrNumber] = 0;
fprintf(stderr, "==> ok\n");
ptrNumber -= 1;
}
else if (num == 2){
int tmpArg = atoi((const char *) &arg1);
ptrArray[tmpArg] = 0;
sizeTable[tmpArg] = 0;
free((void *) ptrArray[tmpArg]);
ptrNumber -= 1;
fprintf(stderr, "==> ok\n");
}
}
else{
fprintf(stderr, "==> list empty :/\n");

}
} else if (strcmp(cmd, "write") == 0) {
if (num == 1){
printf("write: write value [pointer index]\n");
}
else if (num == 2){
int len = strlen((const char *) &arg1);
strcpy(ptrArray[ptrNumber], (const char *) &arg1);
fprintf(stderr, "==> ok, wrote %s\n", ptrArray[ptrNumber]);
}
else if (num == 3){
int len = strlen((const char *) &arg1);
int tmpArg2 = atoi((const char *) &arg2);
//if (tmpArg2 > ptrNumber){
strcpy(ptrArray[tmpArg2], (const char *) &arg1);
fprintf(stderr, "==> ok, wrote %s\n", ptrArray[tmpArg2]);
//}
//else{
// printf("Invalid Index\n");
//}
}
long * src = (long*) arg1;
for (int i = 0; i < arg2; i++) {
fprintf(stderr, "%p: %#16.0lx\n", &src[i], src[i]);
} else if (strcmp(cmd, "listp") == 0) {
printf("\n");
for (int i = 0; i < 20; i++){
if (ptrArray[i]){
printf("%d - %p - %s - %d\n", i, ptrArray[i], ptrArray[i], sizeTable[i]);
}
}
fprintf(stderr, "==> ok\n");
} else if (strcmp(cmd, "listpall") == 0) {
int tmpIndex = 0;
printf("\n");
for (int i=0; i < maxPtr; i++){
printf("%d - %p - %s - %d\n", tmpIndex, ptrArray[tmpIndex], ptrArray[tmpIndex], sizeTable[i]);
tmpIndex++;
}
fprintf(stderr, "==> ok\n");
} else if (strcmp(cmd, "clearlist") == 0) {
ptrNumber = -1;
for (int i = 0; i < maxPtr; i++){
free(ptrArray[i]);
ptrArray[i] = 0;
memset(sizeTable, 0, maxPtr);
}
fprintf(stderr, "==> ok, array cleared\n");
#ifdef __GLIBC__
} else if (strcmp(cmd, "usable") == 0) {
fprintf(stderr, "usable size: %zu\n", malloc_usable_size((void*) arg1));
} else if (strcmp(cmd, "stats") == 0) {
malloc_stats();
} else if (strcmp(cmd, "info") == 0) {
malloc_info(0, stdout);
printf("Ptrptr %d\n", ptrNumber);
} else if (strcmp(cmd, "mcheck") == 0) {
fprintf(stderr, "==> %s\n", mcheck(report_mcheck_fail) == 0 ? "OK" : "ERROR");
} else if (strcmp(cmd, "mcheck_pedantic") == 0) {
Expand All @@ -66,7 +152,8 @@ int main(int argc, char ** argv) {
}
#endif
} else {
puts("Commands: malloc n, free p, show p [n], usable p, stats, info, mprobe [p], mcheck, mcheck_pedantic");
puts("Commands: malloc n, free p, usable p, stats, info, mprobe [p], mcheck, mcheck_pedantic, ");
puts("Commands: [BETA] write str, listp, listpall, clearlist\n");
}
}
}
}