cosmopolitan/test/libc/runtime/gc_test.c

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/mem/mem.h"
#include "libc/runtime/gc.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/o.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"

/* TODO(jart): calling malloc_usable_size was a terrible idea */

TEST(todo_jart, broken_in_opt_native_mode) {
  (void)0;
  (void)0;
}

int64_t fd;

TEST(gc, usageExample_c11) {
  fd = open("/dev/null", O_WRONLY);
  defer(close_s, &fd);
  char *msg = gc(xasprintf("%d + %d = %d", 2, 2, 2 + 2));
  write(fd, msg, strlen(msg));
}

TEST(gc, checkMallocUsableSizeWorksTheWayWeHopeItDoes) {
  char *p = malloc(32);
  EXPECT_GE(malloc_usable_size(p), 32);
  free(p);
  EXPECT_GE(malloc_usable_size(p), 0);
}

noinline void function1of1(char *p) {
  EXPECT_GE(malloc_usable_size(gc(p)), 32);
}
TEST(gc, testOne) {
  char *p = malloc(32);
  function1of1(p);
  EXPECT_EQ(malloc_usable_size(p), 0);
}

noinline void function2of2(char *p1, char *p2) {
  EXPECT_GE(malloc_usable_size(p1), 32);
  EXPECT_GE(malloc_usable_size(p2), 64);
  gc(p2);
  EXPECT_GE(malloc_usable_size(p1), 32);
  EXPECT_GE(malloc_usable_size(p2), 64);
}
noinline void function1of2(char *p1, char *p2) {
  EXPECT_GE(malloc_usable_size(p1), 32);
  EXPECT_GE(malloc_usable_size(p2), 64);
  function2of2(gc(p1), p2);
  EXPECT_GE(malloc_usable_size(p1), 32);
  EXPECT_GE(malloc_usable_size(p2), 0);
}
TEST(gc, testTwo) {
  char *p1 = malloc(32);
  char *p2 = malloc(64);
  function1of2(p1, p2);
  EXPECT_GE(malloc_usable_size(p1), 0);
  EXPECT_GE(malloc_usable_size(p2), 0);
}