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Remove dmalloc support; closes #26426

Browse Source 
Dmalloc hasn't seen a release in over a decade, and there are much
better tools to use these days.
This commit is contained in:
Nick Mathewson 2018-06-20 10:19:56 -04:00
parent e4e949e901
commit 9fa73003fc
9 changed files with 40 additions and 189 deletions
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4
changes/ticket26426 Normal file
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@ -0,0 +1,4 @@
o Removed features:
- Tor no longer supports building with the dmalloc library. For debugging
memory issues, we suggest using gperftools or msan instead.
Closes ticket 26426.

20
configure.ac
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@ -1726,26 +1726,6 @@ if test "$tor_cv_uint8_uchar" = "no"; then
AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
fi
# Whether we should use the dmalloc memory allocation debugging library.
AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
AC_ARG_WITH(dmalloc,
AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
[if [[ "$withval" = "yes" ]]; then
dmalloc=1
AC_MSG_RESULT(yes)
else
dmalloc=1
AC_MSG_RESULT(no)
fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
)
if [[ $dmalloc -eq 1 ]]; then
AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
fi
AC_ARG_WITH(tcmalloc,
AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
[ tcmalloc=yes ], [ tcmalloc=no ])

10
doc/HACKING/HelpfulTools.md
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@ -25,16 +25,6 @@ Jenkins
https://jenkins.torproject.org
Dmalloc
-------
The dmalloc library will keep track of memory allocation, so you can find out
if we're leaking memory, doing any double-frees, or so on.
dmalloc -l -/dmalloc.log
(run the commands it tells you)
./configure --with-dmalloc
Valgrind
--------

13
src/common/crypto.c
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@ -506,16 +506,3 @@ crypto_global_cleanup(void)
}
/** @} */
#ifdef USE_DMALLOC
/** Tell the crypto library to use Tor's allocation functions rather than
* calling libc's allocation functions directly. Return 0 on success, -1
* on failure. */
int
crypto_use_tor_alloc_functions(void)
{
int r = CRYPTO_set_mem_ex_functions(tor_malloc_, tor_realloc_, tor_free_);
return r ? 0 : -1;
}
#endif /* defined(USE_DMALLOC) */

4
src/common/crypto.h
View File

@ -40,9 +40,6 @@ int crypto_early_init(void) ATTR_WUR;
int crypto_global_init(int hardwareAccel,
const char *accelName,
const char *accelPath) ATTR_WUR;
#ifdef USE_DMALLOC
int crypto_use_tor_alloc_functions(void);
#endif
void crypto_thread_cleanup(void);
int crypto_global_cleanup(void);
@ -77,4 +74,3 @@ int crypto_cipher_decrypt_with_iv(const char *key,
void crypto_add_spaces_to_fp(char *out, size_t outlen, const char *in);
#endif /* !defined(TOR_CRYPTO_H) */

73
src/common/util.c
View File

@ -103,35 +103,13 @@
/* =====
* Memory management
* ===== */
#ifdef USE_DMALLOC
#undef strndup
#include <dmalloc.h>
/* Macro to pass the extra dmalloc args to another function. */
#define DMALLOC_FN_ARGS , file, line
#if defined(HAVE_DMALLOC_STRDUP)
/* the dmalloc_strdup should be fine as defined */
#elif defined(HAVE_DMALLOC_STRNDUP)
#define dmalloc_strdup(file, line, string, xalloc_b) \
dmalloc_strndup(file, line, (string), -1, xalloc_b)
#else
#error "No dmalloc_strdup or equivalent"
#endif /* defined(HAVE_DMALLOC_STRDUP) || ... */
#else /* !(defined(USE_DMALLOC)) */
#define DMALLOC_FN_ARGS
#endif /* defined(USE_DMALLOC) */
/** Allocate a chunk of <b>size</b> bytes of memory, and return a pointer to
* result. On error, log and terminate the process. (Same as malloc(size),
* but never returns NULL.)
*
* <b>file</b> and <b>line</b> are used if dmalloc is enabled, and
* ignored otherwise.
*/
void *
tor_malloc_(size_t size DMALLOC_PARAMS)
tor_malloc_(size_t size)
{
void *result;
@ -144,11 +122,7 @@ tor_malloc_(size_t size DMALLOC_PARAMS)
}
#endif /* !defined(MALLOC_ZERO_WORKS) */
#ifdef USE_DMALLOC
result = dmalloc_malloc(file, line, size, DMALLOC_FUNC_MALLOC, 0, 0);
#else
result = raw_malloc(size);
#endif
if (PREDICT_UNLIKELY(result == NULL)) {
/* LCOV_EXCL_START */
@ -167,7 +141,7 @@ tor_malloc_(size_t size DMALLOC_PARAMS)
* the process on error. (Same as calloc(size,1), but never returns NULL.)
*/
void *
tor_malloc_zero_(size_t size DMALLOC_PARAMS)
tor_malloc_zero_(size_t size)
{
/* You may ask yourself, "wouldn't it be smart to use calloc instead of
* malloc+memset? Perhaps libc's calloc knows some nifty optimization trick
@ -175,7 +149,7 @@ tor_malloc_zero_(size_t size DMALLOC_PARAMS)
* we're allocating something very big (it knows if it just got the memory
* from the OS in a pre-zeroed state). We don't want to use tor_malloc_zero
* for big stuff, so we don't bother with calloc. */
void *result = tor_malloc_(size DMALLOC_FN_ARGS);
void *result = tor_malloc_(size);
memset(result, 0, size);
return result;
}
@ -211,10 +185,10 @@ size_mul_check(const size_t x, const size_t y)
* and a compile-time constant.
*/
void *
tor_calloc_(size_t nmemb, size_t size DMALLOC_PARAMS)
tor_calloc_(size_t nmemb, size_t size)
{
tor_assert(size_mul_check(nmemb, size));
return tor_malloc_zero_((nmemb * size) DMALLOC_FN_ARGS);
return tor_malloc_zero_((nmemb * size));
}
/** Change the size of the memory block pointed to by <b>ptr</b> to <b>size</b>
@ -222,7 +196,7 @@ tor_calloc_(size_t nmemb, size_t size DMALLOC_PARAMS)
* terminate. (Like realloc(ptr,size), but never returns NULL.)
*/
void *
tor_realloc_(void *ptr, size_t size DMALLOC_PARAMS)
tor_realloc_(void *ptr, size_t size)
{
void *result;
@ -235,11 +209,7 @@ tor_realloc_(void *ptr, size_t size DMALLOC_PARAMS)
}
#endif /* !defined(MALLOC_ZERO_WORKS) */
#ifdef USE_DMALLOC
result = dmalloc_realloc(file, line, ptr, size, DMALLOC_FUNC_REALLOC, 0);
#else
result = raw_realloc(ptr, size);
#endif
if (PREDICT_UNLIKELY(result == NULL)) {
/* LCOV_EXCL_START */
@ -255,13 +225,13 @@ tor_realloc_(void *ptr, size_t size DMALLOC_PARAMS)
* overflow. Unlike other allocation functions, return NULL on overflow.
*/
void *
tor_reallocarray_(void *ptr, size_t sz1, size_t sz2 DMALLOC_PARAMS)
tor_reallocarray_(void *ptr, size_t sz1, size_t sz2)
{
/* XXXX we can make this return 0, but we would need to check all the
* reallocarray users. */
tor_assert(size_mul_check(sz1, sz2));
return tor_realloc(ptr, (sz1 * sz2) DMALLOC_FN_ARGS);
return tor_realloc(ptr, (sz1 * sz2));
}
/** Return a newly allocated copy of the NUL-terminated string s. On
@ -269,16 +239,13 @@ tor_reallocarray_(void *ptr, size_t sz1, size_t sz2 DMALLOC_PARAMS)
* NULL.)
*/
char *
tor_strdup_(const char *s DMALLOC_PARAMS)
tor_strdup_(const char *s)
{
char *duplicate;
tor_assert(s);
#ifdef USE_DMALLOC
duplicate = dmalloc_strdup(file, line, s, 0);
#else
duplicate = raw_strdup(s);
#endif
if (PREDICT_UNLIKELY(duplicate == NULL)) {
/* LCOV_EXCL_START */
log_err(LD_MM,"Out of memory on strdup(). Dying.");
@ -295,12 +262,12 @@ tor_strdup_(const char *s DMALLOC_PARAMS)
* NULL.)
*/
char *
tor_strndup_(const char *s, size_t n DMALLOC_PARAMS)
tor_strndup_(const char *s, size_t n)
{
char *duplicate;
tor_assert(s);
tor_assert(n < SIZE_T_CEILING);
duplicate = tor_malloc_((n+1) DMALLOC_FN_ARGS);
duplicate = tor_malloc_((n+1));
/* Performance note: Ordinarily we prefer strlcpy to strncpy. But
* this function gets called a whole lot, and platform strncpy is
* much faster than strlcpy when strlen(s) is much longer than n.
@ -313,12 +280,12 @@ tor_strndup_(const char *s, size_t n DMALLOC_PARAMS)
/** Allocate a chunk of <b>len</b> bytes, with the same contents as the
* <b>len</b> bytes starting at <b>mem</b>. */
void *
tor_memdup_(const void *mem, size_t len DMALLOC_PARAMS)
tor_memdup_(const void *mem, size_t len)
{
char *duplicate;
tor_assert(len < SIZE_T_CEILING);
tor_assert(mem);
duplicate = tor_malloc_(len DMALLOC_FN_ARGS);
duplicate = tor_malloc_(len);
memcpy(duplicate, mem, len);
return duplicate;
}
@ -326,12 +293,12 @@ tor_memdup_(const void *mem, size_t len DMALLOC_PARAMS)
/** As tor_memdup(), but add an extra 0 byte at the end of the resulting
* memory. */
void *
tor_memdup_nulterm_(const void *mem, size_t len DMALLOC_PARAMS)
tor_memdup_nulterm_(const void *mem, size_t len)
{
char *duplicate;
tor_assert(len < SIZE_T_CEILING+1);
tor_assert(mem);
duplicate = tor_malloc_(len+1 DMALLOC_FN_ARGS);
duplicate = tor_malloc_(len+1);
memcpy(duplicate, mem, len);
duplicate[len] = '\0';
return duplicate;
@ -365,13 +332,6 @@ tor_log_mallinfo(int severity)
#else /* !(defined(HAVE_MALLINFO)) */
(void)severity;
#endif /* defined(HAVE_MALLINFO) */
#ifdef USE_DMALLOC
dmalloc_log_changed(0, /* Since the program started. */
1, /* Log info about non-freed pointers. */
0, /* Do not log info about freed pointers. */
0 /* Do not log individual pointers. */
);
#endif /* defined(USE_DMALLOC) */
}
ENABLE_GCC_WARNING(aggregate-return)
@ -5375,4 +5335,3 @@ tor_ntohll(uint64_t a)
{
return tor_htonll(a);
}

61
src/common/util.h
View File

@ -34,45 +34,22 @@
#define O_NOFOLLOW 0
#endif
/* If we're building with dmalloc, we want all of our memory allocation
* functions to take an extra file/line pair of arguments. If not, not.
* We define DMALLOC_PARAMS to the extra parameters to insert in the
* function prototypes, and DMALLOC_ARGS to the extra arguments to add
* to calls. */
#ifdef USE_DMALLOC
#define DMALLOC_PARAMS , const char *file, const int line
#define DMALLOC_ARGS , SHORT_FILE__, __LINE__
#else
#define DMALLOC_PARAMS
#define DMALLOC_ARGS
#endif /* defined(USE_DMALLOC) */
/* Memory management */
void *tor_malloc_(size_t size DMALLOC_PARAMS) ATTR_MALLOC;
void *tor_malloc_zero_(size_t size DMALLOC_PARAMS) ATTR_MALLOC;
void *tor_calloc_(size_t nmemb, size_t size DMALLOC_PARAMS) ATTR_MALLOC;
void *tor_realloc_(void *ptr, size_t size DMALLOC_PARAMS);
void *tor_reallocarray_(void *ptr, size_t size1, size_t size2 DMALLOC_PARAMS);
char *tor_strdup_(const char *s DMALLOC_PARAMS) ATTR_MALLOC ATTR_NONNULL((1));
char *tor_strndup_(const char *s, size_t n DMALLOC_PARAMS)
void *tor_malloc_(size_t size) ATTR_MALLOC;
void *tor_malloc_zero_(size_t size) ATTR_MALLOC;
void *tor_calloc_(size_t nmemb, size_t size) ATTR_MALLOC;
void *tor_realloc_(void *ptr, size_t size);
void *tor_reallocarray_(void *ptr, size_t size1, size_t size2);
char *tor_strdup_(const char *s) ATTR_MALLOC ATTR_NONNULL((1));
char *tor_strndup_(const char *s, size_t n)
ATTR_MALLOC ATTR_NONNULL((1));
void *tor_memdup_(const void *mem, size_t len DMALLOC_PARAMS)
void *tor_memdup_(const void *mem, size_t len)
ATTR_MALLOC ATTR_NONNULL((1));
void *tor_memdup_nulterm_(const void *mem, size_t len DMALLOC_PARAMS)
void *tor_memdup_nulterm_(const void *mem, size_t len)
ATTR_MALLOC ATTR_NONNULL((1));
void tor_free_(void *mem);
uint64_t tor_htonll(uint64_t a);
uint64_t tor_ntohll(uint64_t a);
#ifdef USE_DMALLOC
extern int dmalloc_free(const char *file, const int line, void *pnt,
const int func_id);
#define tor_free(p) STMT_BEGIN \
if (PREDICT_LIKELY((p)!=NULL)) { \
dmalloc_free(SHORT_FILE__, __LINE__, (p), 0); \
(p)=NULL; \
} \
STMT_END
#else /* !(defined(USE_DMALLOC)) */
/** Release memory allocated by tor_malloc, tor_realloc, tor_strdup,
* etc. Unlike the free() function, the tor_free() macro sets the
* pointer value to NULL after freeing it.
@ -97,18 +74,17 @@ extern int dmalloc_free(const char *file, const int line, void *pnt,
(p)=NULL; \
STMT_END
#endif
#endif /* defined(USE_DMALLOC) */
#define tor_malloc(size) tor_malloc_(size DMALLOC_ARGS)
#define tor_malloc_zero(size) tor_malloc_zero_(size DMALLOC_ARGS)
#define tor_calloc(nmemb,size) tor_calloc_(nmemb, size DMALLOC_ARGS)
#define tor_realloc(ptr, size) tor_realloc_(ptr, size DMALLOC_ARGS)
#define tor_malloc(size) tor_malloc_(size)
#define tor_malloc_zero(size) tor_malloc_zero_(size)
#define tor_calloc(nmemb,size) tor_calloc_(nmemb, size)
#define tor_realloc(ptr, size) tor_realloc_(ptr, size)
#define tor_reallocarray(ptr, sz1, sz2) \
tor_reallocarray_((ptr), (sz1), (sz2) DMALLOC_ARGS)
#define tor_strdup(s) tor_strdup_(s DMALLOC_ARGS)
#define tor_strndup(s, n) tor_strndup_(s, n DMALLOC_ARGS)
#define tor_memdup(s, n) tor_memdup_(s, n DMALLOC_ARGS)
#define tor_memdup_nulterm(s, n) tor_memdup_nulterm_(s, n DMALLOC_ARGS)
tor_reallocarray_((ptr), (sz1), (sz2))
#define tor_strdup(s) tor_strdup_(s)
#define tor_strndup(s, n) tor_strndup_(s, n)
#define tor_memdup(s, n) tor_memdup_(s, n)
#define tor_memdup_nulterm(s, n) tor_memdup_nulterm_(s, n)
/* Aliases for the underlying system malloc/realloc/free. Only use
* them to indicate "I really want the underlying system function, I know
@ -569,4 +545,3 @@ int size_mul_check(const size_t x, const size_t y);
#define ARRAY_LENGTH(x) ((sizeof(x)) / sizeof(x[0]))
#endif /* !defined(TOR_UTIL_H) */

26
src/or/main.c
View File

@ -110,9 +110,6 @@
#include "or/tor_api_internal.h"
#include "common/util_process.h"
#include "or/ext_orport.h"
#ifdef USE_DMALLOC
#include <dmalloc.h>
#endif
#include "common/memarea.h"
#include "common/sandbox.h"
@ -2695,11 +2692,6 @@ do_hup(void)
{
const or_options_t *options = get_options();
#ifdef USE_DMALLOC
dmalloc_log_stats();
dmalloc_log_changed(0, 1, 0, 0);
#endif
log_notice(LD_GENERAL,"Received reload signal (hup). Reloading config and "
"resetting internal state.");
if (accounting_is_enabled(options))
@ -3639,7 +3631,7 @@ release_lockfile(void)
* only the parts of memory that we won't touch. If !<b>postfork</b>,
* Tor is shutting down and we should free everything.
*
* Helps us find the real leaks with dmalloc and the like. Also valgrind
* Helps us find the real leaks with sanitizers and the like. Also valgrind
* should then report 0 reachable in its leak report (in an ideal world --
* in practice libevent, SSL, libc etc never quite free everything). */
void
@ -3795,18 +3787,11 @@ tor_cleanup(void)
timers_shutdown();
#ifdef USE_DMALLOC
dmalloc_log_stats();
#endif
tor_free_all(0); /* We could move tor_free_all back into the ifdef below
later, if it makes shutdown unacceptably slow. But for
now, leave it here: it's helped us catch bugs in the
past. */
crypto_global_cleanup();
#ifdef USE_DMALLOC
dmalloc_log_unfreed();
dmalloc_shutdown();
#endif
}
/** Read/create keys as needed, and echo our fingerprint to stdout. */
@ -4237,14 +4222,6 @@ tor_run_main(const tor_main_configuration_t *tor_cfg)
tor_compress_init();
init_logging(0);
monotime_init();
#ifdef USE_DMALLOC
{
/* Instruct OpenSSL to use our internal wrappers for malloc,
realloc and free. */
int r = crypto_use_tor_alloc_functions();
tor_assert(r == 0);
}
#endif /* defined(USE_DMALLOC) */
#ifdef NT_SERVICE
{
int done = 0;
@ -4313,4 +4290,3 @@ tor_run_main(const tor_main_configuration_t *tor_cfg)
tor_cleanup();
return result;
}

18
src/test/testing_common.c
View File

@ -32,11 +32,6 @@
#include <dirent.h>
#endif /* defined(_WIN32) */
#ifdef USE_DMALLOC
#include <dmalloc.h>
#include "or/main.h"
#endif
/** Temporary directory (set up by setup_directory) under which we store all
* our files during testing. */
static char temp_dir[256];
@ -231,13 +226,6 @@ main(int c, const char **v)
/* We must initialise logs before we call tor_assert() */
init_logging(1);
#ifdef USE_DMALLOC
{
int r = crypto_use_tor_alloc_functions();
tor_assert(r == 0);
}
#endif /* defined(USE_DMALLOC) */
update_approx_time(time(NULL));
options = options_new();
tor_threads_init();
@ -319,10 +307,7 @@ main(int c, const char **v)
int have_failed = (tinytest_main(c, v, testgroups) != 0);
free_pregenerated_keys();
#ifdef USE_DMALLOC
tor_free_all(0);
dmalloc_log_unfreed();
#endif
crypto_global_cleanup();
if (have_failed)
@ -330,4 +315,3 @@ main(int c, const char **v)
else
return 0;
}