o Test program for dbg_malloc unit.

I'm postfixing test programs with _t, and benchmarks with _b

old-tests/mm/dbg_malloc_t.c

@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2001 Sistina Software
+ *
+ * This file is released under the GPL.
+ */
+
+#include "dbg_malloc.h"
+#include "log.h"
+
+#include <stdio.h>
+#include <unistd.h>
+
+
+static void _print_help(FILE *out, const char *prog)
+{
+	fprintf(out, "usage : %s [-hlbufd]\n\n", prog);
+	fprintf(out, "  h : this message\n");
+	fprintf(out, "  l : cause memory leak\n");
+	fprintf(out, "  b : overrun memory block\n");
+	fprintf(out, "  u : underrun memory block\n");
+	fprintf(out, "  f : free random pointer\n");
+	fprintf(out, "  d : free block twice\n");
+}
+
+struct block_list {
+	struct block_list *next;
+	char dummy[9];
+};
+
+static void _leak_memory(void)
+{
+	int i;
+	struct block_list *b, *head, **l = &head;
+
+	/* allocate a list of blocks */
+	for (i = 0; i < 1000; i++) {
+
+		if (!(b = dbg_malloc(sizeof(*b)))) {
+			log_fatal("Couldn't allocate memory");
+			exit(1);
+		}
+		
+		b->next = 0;
+		*l = b;
+		l = &b->next;
+	}
+
+	/* free off every other block */
+	for (i = 0, l = head; *l; l = &(*l)->next, i++) {
+		if(i & 0x1)
+			db_free(b);
+	}
+}
+
+static void _bounds_overrun()
+{
+	char *b;
+
+	/* allocate a block */
+	b = dbg_malloc(534);
+
+	/* overrun */
+	b[534] = 56;
+
+	/* free it, which should trigger the bounds error */
+	dbg_free(b);
+}
+
+static void _bounds_underrun()
+{
+	char *b;
+
+	/* allocate a block */
+	b = dbg_malloc(534);
+
+	/* underrun */
+	*(b - 1) = 56;
+
+	/* free it, which should trigger the bounds error */
+	dbg_free(b);
+}
+
+static void _free_dud()
+{
+	char *b;
+
+	/* allocate a block */
+	b = dbg_malloc(534);
+
+	/* free it, which should trigger the bounds error */
+	dbg_free(b + 100);
+}
+
+static void _free_twice()
+{
+	char *b;
+
+	/* allocate a block */
+	b = dbg_malloc(534);
+
+	/* free it, which should trigger the bounds error */
+	dbg_free(b);
+	dbg_free(b);
+}
+
+int main(int argc, char **argv)
+{
+	char opt;
+
+	init_log();
+	opt = getopt(argc, argv, "hlbufd");
+	switch(opt) {
+	case EOF:
+	case 'h':
+		_print_help(stdout, argv[0]);
+		break;
+
+	case 'l':
+		_leak_memory();
+		break;
+
+	case 'b':
+		_bounds_overrun();
+		break;
+
+	case 'u':
+		_bounds_underrun();
+		break;
+
+	case 'f':
+		_free_dud();
+		break;
+
+	case 'd':
+		_free_twice();
+		break;
+
+	case '?':
+		fprintf(stderr, "Unknown option -%c\n", opt);
+		exit(1);
+	}
+
+	dump_memory();
+	fin_log();
+	return 0;
+}