/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* https://www.openssl.org/source/license.html
*/
+#include "e_os.h"
+#include "internal/cryptlib.h"
+#include "internal/cryptlib_int.h"
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <openssl/crypto.h>
-#include "internal/cryptlib.h"
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG_BACKTRACE
+# include <execinfo.h>
+#endif
/*
* the following pointers may be changed as long as 'allow_customize' is set
= CRYPTO_free;
#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+# include "internal/tsan_assist.h"
+
+static TSAN_QUALIFIER int malloc_count;
+static TSAN_QUALIFIER int realloc_count;
+static TSAN_QUALIFIER int free_count;
+
+# define INCREMENT(x) tsan_counter(&(x))
+
+static char *md_failstring;
+static long md_count;
+static int md_fail_percent = 0;
+static int md_tracefd = -1;
static int call_malloc_debug = 1;
+
+static void parseit(void);
+static int shouldfail(void);
+
+# define FAILTEST() if (shouldfail()) return NULL
+
#else
static int call_malloc_debug = 0;
+
+# define INCREMENT(x) /* empty */
+# define FAILTEST() /* empty */
#endif
int CRYPTO_set_mem_functions(
*f = free_impl;
}
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+void CRYPTO_get_alloc_counts(int *mcount, int *rcount, int *fcount)
+{
+ if (mcount != NULL)
+ *mcount = tsan_load(&malloc_count);
+ if (rcount != NULL)
+ *rcount = tsan_load(&realloc_count);
+ if (fcount != NULL)
+ *fcount = tsan_load(&free_count);
+}
+
+/*
+ * Parse a "malloc failure spec" string. This likes like a set of fields
+ * separated by semicolons. Each field has a count and an optional failure
+ * percentage. For example:
+ * 100@0;100@25;0@0
+ * or 100;100@25;0
+ * This means 100 mallocs succeed, then next 100 fail 25% of the time, and
+ * all remaining (count is zero) succeed.
+ */
+static void parseit(void)
+{
+ char *semi = strchr(md_failstring, ';');
+ char *atsign;
+
+ if (semi != NULL)
+ *semi++ = '\0';
+
+ /* Get the count (atol will stop at the @ if there), and percentage */
+ md_count = atol(md_failstring);
+ atsign = strchr(md_failstring, '@');
+ md_fail_percent = atsign == NULL ? 0 : atoi(atsign + 1);
+
+ if (semi != NULL)
+ md_failstring = semi;
+}
+
+/*
+ * Windows doesn't have random(), but it has rand()
+ * Some rand() implementations aren't good, but we're not
+ * dealing with secure randomness here.
+ */
+# ifdef _WIN32
+# define random() rand()
+# endif
+/*
+ * See if the current malloc should fail.
+ */
+static int shouldfail(void)
+{
+ int roll = (int)(random() % 100);
+ int shoulditfail = roll < md_fail_percent;
+# ifndef _WIN32
+/* suppressed on Windows as POSIX-like file descriptors are non-inheritable */
+ int len;
+ char buff[80];
+
+ if (md_tracefd > 0) {
+ BIO_snprintf(buff, sizeof(buff),
+ "%c C%ld %%%d R%d\n",
+ shoulditfail ? '-' : '+', md_count, md_fail_percent, roll);
+ len = strlen(buff);
+ if (write(md_tracefd, buff, len) != len)
+ perror("shouldfail write failed");
+# ifndef OPENSSL_NO_CRYPTO_MDEBUG_BACKTRACE
+ if (shoulditfail) {
+ void *addrs[30];
+ int num = backtrace(addrs, OSSL_NELEM(addrs));
+
+ backtrace_symbols_fd(addrs, num, md_tracefd);
+ }
+# endif
+ }
+# endif
+
+ if (md_count) {
+ /* If we used up this one, go to the next. */
+ if (--md_count == 0)
+ parseit();
+ }
+
+ return shoulditfail;
+}
+
+void ossl_malloc_setup_failures(void)
+{
+ const char *cp = getenv("OPENSSL_MALLOC_FAILURES");
+
+ if (cp != NULL && (md_failstring = strdup(cp)) != NULL)
+ parseit();
+ if ((cp = getenv("OPENSSL_MALLOC_FD")) != NULL)
+ md_tracefd = atoi(cp);
+}
+#endif
+
void *CRYPTO_malloc(size_t num, const char *file, int line)
{
void *ret = NULL;
+ INCREMENT(malloc_count);
if (malloc_impl != NULL && malloc_impl != CRYPTO_malloc)
return malloc_impl(num, file, line);
- if (num <= 0)
+ if (num == 0)
return NULL;
- allow_customize = 0;
+ FAILTEST();
+ if (allow_customize) {
+ /*
+ * Disallow customization after the first allocation. We only set this
+ * if necessary to avoid a store to the same cache line on every
+ * allocation.
+ */
+ allow_customize = 0;
+ }
#ifndef OPENSSL_NO_CRYPTO_MDEBUG
if (call_malloc_debug) {
CRYPTO_mem_debug_malloc(NULL, num, 0, file, line);
ret = malloc(num);
}
#else
- osslargused(file); osslargused(line);
+ (void)(file); (void)(line);
ret = malloc(num);
#endif
{
void *ret = CRYPTO_malloc(num, file, line);
+ FAILTEST();
if (ret != NULL)
memset(ret, 0, num);
return ret;
void *CRYPTO_realloc(void *str, size_t num, const char *file, int line)
{
+ INCREMENT(realloc_count);
if (realloc_impl != NULL && realloc_impl != &CRYPTO_realloc)
return realloc_impl(str, num, file, line);
+ FAILTEST();
if (str == NULL)
return CRYPTO_malloc(num, file, line);
return NULL;
}
- allow_customize = 0;
#ifndef OPENSSL_NO_CRYPTO_MDEBUG
if (call_malloc_debug) {
void *ret;
return ret;
}
#else
- osslargused(file); osslargused(line);
+ (void)(file); (void)(line);
#endif
return realloc(str, num);
void CRYPTO_free(void *str, const char *file, int line)
{
+ INCREMENT(free_count);
if (free_impl != NULL && free_impl != &CRYPTO_free) {
free_impl(str, file, line);
return;
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