Remove mallinfo() from codebase

Now deprecated in libc >= 2.33

Closes #40309
Signed-off-by: David Goulet <dgoulet@torproject.org>

changes/ticket40309

+  o New system requirements (mallinfo() deprecated):
+    - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it. Closes
+      ticket 40309.

configure.ac

@@ -1937,7 +1937,6 @@ AS_CASE([$malloc],
 
   [system], [
      # handle this later, including the jemalloc fallback
-    AC_CHECK_FUNCS(mallinfo)
   ],
 
   [AC_MSG_ERROR([--with-malloc=`$with_malloc' not supported, see --help])

src/app/main/main.c

@@ -316,7 +316,6 @@ dumpmemusage(int severity)
   dump_routerlist_mem_usage(severity);
   dump_cell_pool_usage(severity);
   dump_dns_mem_usage(severity);
-  tor_log_mallinfo(severity);
 }
 
 /** Write all statistics to the log, with log level <b>severity</b>. Called

src/lib/meminfo/meminfo.c

@@ -37,29 +37,6 @@
 #include <sys/sysctl.h>
 #endif
 
-DISABLE_GCC_WARNING(aggregate-return)
-/** Call the platform malloc info function, and dump the results to the log at
- * level <b>severity</b>.  If no such function exists, do nothing. */
-void
-tor_log_mallinfo(int severity)
-{
-#ifdef HAVE_MALLINFO
-  struct mallinfo mi;
-  memset(&mi, 0, sizeof(mi));
-  mi = mallinfo();
-  tor_log(severity, LD_MM,
-      "mallinfo() said: arena=%d, ordblks=%d, smblks=%d, hblks=%d, "
-      "hblkhd=%d, usmblks=%d, fsmblks=%d, uordblks=%d, fordblks=%d, "
-      "keepcost=%d",
-      mi.arena, mi.ordblks, mi.smblks, mi.hblks,
-      mi.hblkhd, mi.usmblks, mi.fsmblks, mi.uordblks, mi.fordblks,
-      mi.keepcost);
-#else /* !(defined(HAVE_MALLINFO)) */
-  (void)severity;
-#endif /* defined(HAVE_MALLINFO) */
-}
-ENABLE_GCC_WARNING(aggregate-return)
-
 #if defined(HW_PHYSMEM64)
 /* OpenBSD and NetBSD define this */
 #define INT64_HW_MEM HW_PHYSMEM64

src/lib/meminfo/meminfo.h

@@ -15,7 +15,6 @@
 #include "lib/testsupport/testsupport.h"
 #include <stddef.h>
 
-void tor_log_mallinfo(int severity);
 MOCK_DECL(int, get_total_system_memory, (size_t *mem_out));
 
 #endif

src/test/test_util.c

@@ -6394,57 +6394,6 @@ test_util_get_unquoted_path(void *arg)
   tor_free(r);
 }
 
-static void
-test_util_log_mallinfo(void *arg)
-{
-  (void)arg;
-  char *log1 = NULL, *log2 = NULL, *mem = NULL;
-#ifdef HAVE_MALLINFO
-  setup_capture_of_logs(LOG_INFO);
-  tor_log_mallinfo(LOG_INFO);
-  expect_single_log_msg_containing("mallinfo() said: ");
-  mock_saved_log_entry_t *lg = smartlist_get(mock_saved_logs(), 0);
-  log1 = tor_strdup(lg->generated_msg);
-
-  mock_clean_saved_logs();
-  mem = tor_malloc(8192);
-  tor_log_mallinfo(LOG_INFO);
-  expect_single_log_msg_containing("mallinfo() said: ");
-  lg = smartlist_get(mock_saved_logs(), 0);
-  log2 = tor_strdup(lg->generated_msg);
-
-  /* Make sure that the amount of used memory increased. */
-  const char *used1 = strstr(log1, "uordblks=");
-  const char *used2 = strstr(log2, "uordblks=");
-  tt_assert(used1);
-  tt_assert(used2);
-  used1 += strlen("uordblks=");
-  used2 += strlen("uordblks=");
-
-  int ok1, ok2;
-  char *next1 = NULL, *next2 = NULL;
-  uint64_t mem1 = tor_parse_uint64(used1, 10, 0, UINT64_MAX, &ok1, &next1);
-  uint64_t mem2 = tor_parse_uint64(used2, 10, 0, UINT64_MAX, &ok2, &next2);
-  tt_assert(ok1);
-  tt_assert(ok2);
-  tt_assert(next1);
-  tt_assert(next2);
-  if (mem2 == 0) {
-    /* This is a fake mallinfo that doesn't actually fill in its outputs. */
-    tt_u64_op(mem1, OP_EQ, 0);
-  } else {
-    tt_u64_op(mem1, OP_LT, mem2);
-  }
-#else
-  tt_skip();
-#endif
- done:
-  teardown_capture_of_logs();
-  tor_free(log1);
-  tor_free(log2);
-  tor_free(mem);
-}
-
 #define UTIL_LEGACY(name)                                               \
   { #name, test_util_ ## name , 0, NULL, NULL }
 
@@ -6584,6 +6533,5 @@ struct testcase_t util_tests[] = {
   UTIL_TEST(monotonic_time_add_msec, 0),
   UTIL_TEST(htonll, 0),
   UTIL_TEST(get_unquoted_path, 0),
-  UTIL_TEST(log_mallinfo, 0),
   END_OF_TESTCASES
 };