fixed segmention fault

abort allocation after first malloc fail

newlib/examples/memtest.c

@@ -20,41 +20,64 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <dirent.h>
 
 int print_usage() {
-	printf("usage: [size mb/kb/b]");
+	printf("usage: size mb/kb/b [chunks]\n");
 	exit(0);
 }
 
 int main(int argc, char** argv)
 {
-	int m = 0;
+	int multp = 0;
-	uint32_t size = 0;
+	int size = 0;
-	if(argc <= 2)
+	int chunks = 1;
-		print_usage();
+
-	if(argc == 3) {
+	void **test;
-		if(!strcmp(argv[2], "mb"))
+
-			m = 1024*1024;
+	if (argc <= 2 || argc > 4)
-		else if(!strcmp(argv[2], "kb"))
-			m = 1024;
-		else if(!strcmp(argv[2], "b"))
-			m = 0;
-		else
-			print_usage();
-	}
-	if(argc > 3)
-		print_usage();
-	
-	size = atoi(argv[1]);
-	if(size <= 0)
 		print_usage();
 
-	size *= m;
+	size = atoi(argv[1]);
-	uint8_t* test = malloc(size);
+	if (size <= 0)
-	printf("malloc(%d) - START: %p END: %p \n", size, test, test + size);
+		print_usage();
+
+	if (!strcasecmp(argv[2], "mb"))
+		multp = 1024*1024;
+	else if (!strcasecmp(argv[2], "kb"))
+		multp = 1024;
+	else if (!strcasecmp(argv[2], "b"))
+		multp = 1;
+	else
+		print_usage();
+	size *= multp;
+
+	if (argc == 4)
+		chunks = atoi(argv[3]);
+
+	test = malloc(chunks * sizeof(void *));
+	if (!test)
+		printf("malloc(%d) - FAILED!\n", chunks * sizeof(void *));
+
+	// allocate...
+	int i;
+	for (i = 0; i < chunks; i++) {
+		test[i] = malloc(size);
+		if (test[i])
+			printf("malloc(%d)\tCHUNK: %d START: %p END: %p\n", size, i, test[i], test[i] + size);
+		else {
+			printf("malloc(%d)\tFAILED! Abort allocation, start with freeing memory\n", size);
+			break;
+		}
+	}
+
+	// and release again
+	for (i = 0; i < chunks; i++) {
+		if (test[i]) {
+			free(test[i]);
+			printf("free(%p)\tCHUNK: %d\n", test[i], i);
+		}
+	}
+
+	free(test);
 	return 0;
 }