mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-22 14:09:02 +00:00
464858dbb4
This fixes a regression in mmap(MAP_FIXED) on Windows caused by a recent revision. This change also fixes ZipOS so it no longer needs a MAP_FIXED mapping to open files from the PKZIP store. The memory mapping mutex was implemented incorrectly earlier which meant that ftrace and strace could cause cause crashes. This lock and other recursive mutexes are rewritten so that it should be provable that recursive mutexes in cosmopolitan are asynchronous signal safe.
451 lines
16 KiB
C
451 lines
16 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│ vi: set et 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 "ape/sections.internal.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/calls/syscall-sysv.internal.h"
|
|
#include "libc/calls/ucontext.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/intrin/atomic.h"
|
|
#include "libc/intrin/kprintf.h"
|
|
#include "libc/intrin/safemacros.internal.h"
|
|
#include "libc/intrin/xchg.internal.h"
|
|
#include "libc/limits.h"
|
|
#include "libc/log/log.h"
|
|
#include "libc/macros.internal.h"
|
|
#include "libc/mem/gc.h"
|
|
#include "libc/mem/mem.h"
|
|
#include "libc/runtime/memtrack.internal.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/runtime/stack.h"
|
|
#include "libc/runtime/sysconf.h"
|
|
#include "libc/stdio/rand.h"
|
|
#include "libc/stdio/stdio.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/consts/auxv.h"
|
|
#include "libc/sysv/consts/map.h"
|
|
#include "libc/sysv/consts/msync.h"
|
|
#include "libc/sysv/consts/o.h"
|
|
#include "libc/sysv/consts/prot.h"
|
|
#include "libc/sysv/consts/sa.h"
|
|
#include "libc/sysv/consts/sig.h"
|
|
#include "libc/testlib/ezbench.h"
|
|
#include "libc/testlib/testlib.h"
|
|
#include "libc/x/xspawn.h"
|
|
#include "third_party/xed/x86.h"
|
|
|
|
// this is also a good torture test for mmap
|
|
//
|
|
// make -j o//test/libc/intrin/pthread_mutex_lock2_test
|
|
// for i in $(seq 100); do
|
|
// o//test/libc/intrin/pthread_mutex_lock2_test &
|
|
// done
|
|
//
|
|
|
|
__static_yoink("zipos");
|
|
|
|
int granularity;
|
|
|
|
void SetUpOnce(void) {
|
|
granularity = __granularity();
|
|
testlib_enable_tmp_setup_teardown();
|
|
// ASSERT_SYS(0, 0, pledge("stdio rpath wpath cpath proc", 0));
|
|
}
|
|
|
|
TEST(mmap, zeroSize) {
|
|
ASSERT_SYS(EINVAL, MAP_FAILED,
|
|
mmap(NULL, 0, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0));
|
|
}
|
|
|
|
TEST(mmap, overflow) {
|
|
ASSERT_SYS(ENOMEM, MAP_FAILED,
|
|
mmap(NULL, 0x800000000000, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE,
|
|
-1, 0));
|
|
ASSERT_SYS(ENOMEM, MAP_FAILED,
|
|
mmap(NULL, 0x7fffffffffff, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE,
|
|
-1, 0));
|
|
}
|
|
|
|
TEST(mmap, noreplaceImage) {
|
|
ASSERT_SYS(EEXIST, MAP_FAILED,
|
|
mmap(__executable_start, granularity, PROT_READ,
|
|
MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED_NOREPLACE, -1, 0));
|
|
}
|
|
|
|
TEST(mmap, noreplaceExistingMap) {
|
|
char *p;
|
|
ASSERT_NE(MAP_FAILED, (p = mmap(0, granularity, PROT_READ,
|
|
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0)));
|
|
ASSERT_SYS(EEXIST, MAP_FAILED,
|
|
mmap(p, granularity, PROT_READ,
|
|
MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED_NOREPLACE, -1, 0));
|
|
EXPECT_SYS(0, 0, munmap(p, granularity));
|
|
}
|
|
|
|
TEST(mmap, fixedTaken) {
|
|
char *p;
|
|
ASSERT_NE(MAP_FAILED, (p = mmap(0, granularity, PROT_READ,
|
|
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0)));
|
|
ASSERT_NE(MAP_FAILED, mmap(p, granularity, PROT_READ,
|
|
MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0));
|
|
EXPECT_SYS(0, 0, munmap(p, granularity));
|
|
}
|
|
|
|
TEST(mmap, hint) {
|
|
char *p, *q;
|
|
|
|
// obtain four pages
|
|
EXPECT_NE(MAP_FAILED, (p = mmap(NULL, granularity * 4, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)));
|
|
|
|
// unmap two of those pages
|
|
EXPECT_SYS(0, 0, munmap(p + granularity, granularity));
|
|
EXPECT_SYS(0, 0, munmap(p + granularity * 3, granularity));
|
|
|
|
// test AVAILABLE nonfixed nonzero addr is granted
|
|
// - posix doesn't mandate this behavior (but should)
|
|
// - freebsd always chooses for you (which has no acceptable workaround)
|
|
// - netbsd manual claims it'll be like freebsd, but is actually like openbsd
|
|
if (!IsFreebsd())
|
|
EXPECT_EQ(p + granularity, mmap(p + granularity, granularity, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0));
|
|
|
|
// test UNAVAILABLE nonfixed nonzero addr picks something nearby
|
|
// - posix actually does require this, but doesn't say how close
|
|
// - xnu / linux / openbsd always choose nearest on the right
|
|
// - freebsd goes about 16mb to the right
|
|
// - qemu-user is off the wall
|
|
if (!IsQemuUser()) {
|
|
q = mmap(p + granularity * 2, granularity, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
EXPECT_LE(ABS(q - (p + granularity * 2)), 64 * 1024 * 1024);
|
|
EXPECT_SYS(0, 0, munmap(q, granularity));
|
|
}
|
|
|
|
// clean up
|
|
EXPECT_SYS(0, 0, munmap(p, granularity * 4));
|
|
}
|
|
|
|
TEST(mmap, smallerThanPage_mapsRemainder) {
|
|
long pagesz = sysconf(_SC_PAGESIZE);
|
|
char *map =
|
|
mmap(0, 4096, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
ASSERT_NE(MAP_FAILED, map);
|
|
EXPECT_TRUE(testlib_memoryexists(map));
|
|
EXPECT_TRUE(testlib_memoryexists(map + (pagesz - 1)));
|
|
EXPECT_SYS(0, 0, munmap(map, 1));
|
|
EXPECT_FALSE(testlib_memoryexists(map));
|
|
EXPECT_FALSE(testlib_memoryexists(map + (pagesz - 1)));
|
|
}
|
|
|
|
TEST(mmap, testMapFile) {
|
|
int fd;
|
|
char *p;
|
|
char path[PATH_MAX];
|
|
sprintf(path, "%s.%ld", program_invocation_short_name, lemur64());
|
|
ASSERT_NE(-1, (fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0644)));
|
|
EXPECT_EQ(5, write(fd, "hello", 5));
|
|
EXPECT_NE(-1, fdatasync(fd));
|
|
EXPECT_NE(MAP_FAILED, (p = mmap(NULL, 5, PROT_READ, MAP_PRIVATE, fd, 0)));
|
|
EXPECT_STREQN("hello", p, 5);
|
|
EXPECT_NE(-1, munmap(p, 5));
|
|
EXPECT_NE(-1, close(fd));
|
|
EXPECT_NE(-1, unlink(path));
|
|
}
|
|
|
|
TEST(mmap, testMapFile_fdGetsClosed_makesNoDifference) {
|
|
int fd;
|
|
char *p, buf[16], path[PATH_MAX];
|
|
sprintf(path, "%s.%ld", program_invocation_short_name, lemur64());
|
|
ASSERT_NE(-1, (fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0644)));
|
|
EXPECT_EQ(5, write(fd, "hello", 5));
|
|
EXPECT_NE(-1, fdatasync(fd));
|
|
EXPECT_NE(MAP_FAILED,
|
|
(p = mmap(NULL, 5, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)));
|
|
EXPECT_NE(-1, close(fd));
|
|
EXPECT_STREQN("hello", p, 5);
|
|
p[1] = 'a';
|
|
EXPECT_NE(-1, msync(p, getauxval(AT_PAGESZ), MS_SYNC));
|
|
ASSERT_NE(-1, (fd = open(path, O_RDONLY)));
|
|
EXPECT_EQ(5, read(fd, buf, 5));
|
|
EXPECT_STREQN("hallo", buf, 5);
|
|
EXPECT_NE(-1, close(fd));
|
|
EXPECT_NE(-1, munmap(p, 5));
|
|
EXPECT_NE(-1, unlink(path));
|
|
}
|
|
|
|
TEST(mmap, fileOffset) {
|
|
int fd;
|
|
char *map;
|
|
int offset_align = IsWindows() ? granularity : getauxval(AT_PAGESZ);
|
|
ASSERT_NE(-1, (fd = open("foo", O_CREAT | O_RDWR, 0644)));
|
|
EXPECT_NE(-1, ftruncate(fd, offset_align * 2));
|
|
EXPECT_NE(-1, pwrite(fd, "hello", 5, offset_align * 0));
|
|
EXPECT_NE(-1, pwrite(fd, "there", 5, offset_align * 1));
|
|
EXPECT_NE(-1, fdatasync(fd));
|
|
ASSERT_NE(MAP_FAILED, (map = mmap(NULL, offset_align, PROT_READ, MAP_PRIVATE,
|
|
fd, offset_align)));
|
|
EXPECT_EQ(0, memcmp(map, "there", 5), "%#.*s", 5, map);
|
|
EXPECT_NE(-1, munmap(map, offset_align));
|
|
EXPECT_NE(-1, close(fd));
|
|
}
|
|
|
|
TEST(mmap, mapPrivate_writesDontChangeFile) {
|
|
int fd;
|
|
char *map, buf[6];
|
|
ASSERT_NE(-1, (fd = open("bar", O_CREAT | O_RDWR, 0644)));
|
|
EXPECT_NE(-1, ftruncate(fd, granularity));
|
|
EXPECT_NE(-1, pwrite(fd, "hello", 5, 0));
|
|
ASSERT_NE(MAP_FAILED, (map = mmap(NULL, granularity, PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE, fd, 0)));
|
|
memcpy(map, "there", 5);
|
|
EXPECT_NE(-1, msync(map, granularity, MS_SYNC));
|
|
EXPECT_NE(-1, munmap(map, granularity));
|
|
EXPECT_NE(-1, pread(fd, buf, 6, 0));
|
|
EXPECT_EQ(0, memcmp(buf, "hello", 5), "%#.*s", 5, buf);
|
|
EXPECT_NE(-1, close(fd));
|
|
}
|
|
|
|
static const char *ziposLifePath = "/zip/life.elf";
|
|
|
|
TEST(mmap, ziposCannotBeShared) {
|
|
int fd;
|
|
void *p;
|
|
ASSERT_NE(-1, (fd = open(ziposLifePath, O_RDONLY), "%s", ziposLifePath));
|
|
EXPECT_SYS(EINVAL, MAP_FAILED,
|
|
(p = mmap(NULL, granularity, PROT_READ, MAP_SHARED, fd, 0)));
|
|
close(fd);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// zipos NON-SHARED READ-ONLY FILE MEMORY
|
|
|
|
TEST(mmap, ziposCow) {
|
|
int fd;
|
|
void *p;
|
|
ASSERT_NE(-1, (fd = open(ziposLifePath, O_RDONLY), "%s", ziposLifePath));
|
|
EXPECT_NE(MAP_FAILED,
|
|
(p = mmap(NULL, granularity, PROT_READ, MAP_PRIVATE, fd, 0)));
|
|
EXPECT_STREQN("\177ELF", ((const char *)p), 4);
|
|
EXPECT_NE(-1, munmap(p, granularity));
|
|
EXPECT_NE(-1, close(fd));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// zipos NON-SHARED READ-ONLY FILE MEMORY BETWEEN PROCESSES
|
|
|
|
TEST(mmap, ziposCowFileMapReadonlyFork) {
|
|
int fd, ws;
|
|
void *p;
|
|
ASSERT_NE(-1, (fd = open(ziposLifePath, O_RDONLY), "%s", ziposLifePath));
|
|
EXPECT_NE(MAP_FAILED, (p = mmap(NULL, 4, PROT_READ, MAP_PRIVATE, fd, 0)));
|
|
EXPECT_STREQN("ELF", ((const char *)p) + 1, 3);
|
|
ASSERT_NE(-1, (ws = xspawn(0)));
|
|
if (ws == -2) {
|
|
ASSERT_STREQN("ELF", ((const char *)p) + 1, 3);
|
|
_exit(0);
|
|
}
|
|
EXPECT_EQ(0, ws);
|
|
EXPECT_STREQN("ELF", ((const char *)p) + 1, 3);
|
|
EXPECT_NE(-1, munmap(p, 6));
|
|
EXPECT_NE(-1, close(fd));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// zipos NON-SHARED READ/WRITE FILE MEMORY BETWEEN PROCESSES
|
|
|
|
TEST(mmap, ziposCowFileMapFork) {
|
|
int fd, ws;
|
|
void *p;
|
|
char lol[4];
|
|
ASSERT_NE(-1, (fd = open(ziposLifePath, O_RDONLY), "%s", ziposLifePath));
|
|
EXPECT_NE(MAP_FAILED,
|
|
(p = mmap(NULL, 6, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0)));
|
|
memcpy(p, "parnt", 6);
|
|
ASSERT_NE(-1, (ws = xspawn(0)));
|
|
if (ws == -2) {
|
|
ASSERT_STREQN("parnt", p, 5);
|
|
strcpy(p, "child");
|
|
ASSERT_STREQN("child", p, 5);
|
|
_exit(0);
|
|
}
|
|
EXPECT_EQ(0, ws);
|
|
EXPECT_STREQN("parnt", p, 5); // child changing memory did not change parent
|
|
EXPECT_EQ(4, pread(fd, lol, 4, 0));
|
|
EXPECT_STREQN("ELF", &lol[1], 3); // changing memory did not change file
|
|
EXPECT_NE(-1, munmap(p, 6));
|
|
EXPECT_NE(-1, close(fd));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// NON-SHARED READ-ONLY FILE MEMORY
|
|
|
|
TEST(mmap, cow) {
|
|
int fd;
|
|
char *p;
|
|
char path[PATH_MAX];
|
|
sprintf(path, "%s.%ld", program_invocation_short_name, lemur64());
|
|
ASSERT_NE(-1, (fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0644)), "%s",
|
|
path);
|
|
EXPECT_EQ(5, write(fd, "hello", 5));
|
|
EXPECT_NE(-1, fdatasync(fd));
|
|
EXPECT_NE(MAP_FAILED, (p = mmap(NULL, 5, PROT_READ, MAP_PRIVATE, fd, 0)));
|
|
EXPECT_STREQN("hello", p, 5);
|
|
EXPECT_NE(-1, munmap(p, 5));
|
|
EXPECT_NE(-1, close(fd));
|
|
EXPECT_NE(-1, unlink(path));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// NON-SHARED READ-ONLY FILE MEMORY BETWEEN PROCESSES
|
|
|
|
TEST(mmap, cowFileMapReadonlyFork) {
|
|
char *p;
|
|
int fd, ws;
|
|
char path[PATH_MAX];
|
|
sprintf(path, "%s.%ld", program_invocation_short_name, lemur64());
|
|
ASSERT_NE(-1, (fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0644)));
|
|
EXPECT_EQ(6, write(fd, "hello", 6));
|
|
EXPECT_NE(-1, close(fd));
|
|
ASSERT_NE(-1, (fd = open(path, O_RDONLY)));
|
|
EXPECT_NE(MAP_FAILED, (p = mmap(NULL, 6, PROT_READ, MAP_PRIVATE, fd, 0)));
|
|
EXPECT_STREQN("hello", p, 5);
|
|
ASSERT_NE(-1, (ws = xspawn(0)));
|
|
if (ws == -2) {
|
|
ASSERT_STREQN("hello", p, 5);
|
|
_exit(0);
|
|
}
|
|
EXPECT_EQ(0, ws);
|
|
EXPECT_STREQN("hello", p, 5);
|
|
EXPECT_NE(-1, munmap(p, 6));
|
|
EXPECT_NE(-1, close(fd));
|
|
EXPECT_NE(-1, unlink(path));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// NON-SHARED READ/WRITE FILE MEMORY BETWEEN PROCESSES
|
|
|
|
TEST(mmap, cowFileMapFork) {
|
|
char *p;
|
|
int fd, ws;
|
|
char path[PATH_MAX], lol[6];
|
|
sprintf(path, "%s.%ld", program_invocation_short_name, lemur64());
|
|
ASSERT_NE(-1, (fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0644)));
|
|
EXPECT_EQ(6, write(fd, "parnt", 6));
|
|
EXPECT_NE(-1, fdatasync(fd));
|
|
EXPECT_NE(MAP_FAILED,
|
|
(p = mmap(NULL, 6, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0)));
|
|
EXPECT_STREQN("parnt", p, 5);
|
|
ASSERT_NE(-1, (ws = xspawn(0)));
|
|
if (ws == -2) {
|
|
ASSERT_STREQN("parnt", p, 5);
|
|
strcpy(p, "child");
|
|
ASSERT_STREQN("child", p, 5);
|
|
_exit(0);
|
|
}
|
|
EXPECT_EQ(0, ws);
|
|
EXPECT_STREQN("parnt", p, 5); // child changing memory did not change parent
|
|
EXPECT_EQ(6, pread(fd, lol, 6, 0));
|
|
EXPECT_STREQN("parnt", lol, 5); // changing memory did not change file
|
|
EXPECT_NE(-1, munmap(p, 6));
|
|
EXPECT_NE(-1, close(fd));
|
|
EXPECT_NE(-1, unlink(path));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// SHARED ANONYMOUS MEMORY BETWEEN PROCESSES
|
|
|
|
TEST(mmap, sharedAnonMapFork) {
|
|
int ws;
|
|
char *p;
|
|
EXPECT_NE(MAP_FAILED, (p = mmap(NULL, 6, PROT_READ | PROT_WRITE,
|
|
MAP_SHARED | MAP_ANONYMOUS, -1, 0)));
|
|
strcpy(p, "parnt");
|
|
EXPECT_STREQN("parnt", p, 5);
|
|
ASSERT_NE(-1, (ws = xspawn(0)));
|
|
if (ws == -2) {
|
|
ASSERT_STREQN("parnt", p, 5);
|
|
strcpy(p, "child");
|
|
ASSERT_STREQN("child", p, 5);
|
|
_exit(0);
|
|
}
|
|
EXPECT_EQ(0, ws);
|
|
EXPECT_STREQN("child", p, 5); // boom
|
|
EXPECT_NE(-1, munmap(p, 5));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// SHARED FILE MEMORY BETWEEN PROCESSES
|
|
|
|
TEST(mmap, sharedFileMapFork) {
|
|
char *p;
|
|
int fd, ws;
|
|
char path[PATH_MAX], lol[6];
|
|
sprintf(path, "%s.%ld", program_invocation_short_name, lemur64());
|
|
ASSERT_NE(-1, (fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0644)));
|
|
EXPECT_EQ(6, write(fd, "parnt", 6));
|
|
EXPECT_NE(-1, fdatasync(fd));
|
|
EXPECT_NE(MAP_FAILED,
|
|
(p = mmap(NULL, 6, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)));
|
|
EXPECT_STREQN("parnt", p, 5);
|
|
ASSERT_NE(-1, (ws = xspawn(0)));
|
|
if (ws == -2) {
|
|
ASSERT_STREQN("parnt", p, 5);
|
|
strcpy(p, "child");
|
|
ASSERT_STREQN("child", p, 5);
|
|
ASSERT_NE(-1, msync(p, 6, MS_SYNC | MS_INVALIDATE));
|
|
_exit(0);
|
|
}
|
|
EXPECT_EQ(0, ws);
|
|
EXPECT_STREQN("child", p, 5); // child changing memory changed parent memory
|
|
// XXX: RHEL5 has a weird issue where if we read the file into its own
|
|
// shared memory then corruption occurs!
|
|
EXPECT_EQ(6, pread(fd, lol, 6, 0));
|
|
EXPECT_STREQN("child", lol, 5); // changing memory changed file
|
|
EXPECT_NE(-1, munmap(p, 6));
|
|
EXPECT_NE(-1, close(fd));
|
|
EXPECT_NE(-1, unlink(path));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// BENCHMARKS
|
|
|
|
#define N (EZBENCH_COUNT * EZBENCH_TRIES)
|
|
|
|
int count;
|
|
void *ptrs[N];
|
|
|
|
void BenchMmapPrivate(void) {
|
|
void *p;
|
|
p = mmap(0, granularity, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE,
|
|
-1, 0);
|
|
if (p == MAP_FAILED)
|
|
__builtin_trap();
|
|
ptrs[count++] = p;
|
|
}
|
|
|
|
void BenchUnmap(void) {
|
|
if (munmap(ptrs[--count], granularity))
|
|
__builtin_trap();
|
|
}
|
|
|
|
BENCH(mmap, bench) {
|
|
EZBENCH2("mmap", donothing, BenchMmapPrivate());
|
|
EZBENCH2("munmap", donothing, BenchUnmap());
|
|
}
|