mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 23:13:34 +00:00
8ff48201ca
This change takes an entirely new approach to the incremental linking of pkzip executables. The assets created by zipobj.com are now treated like debug data. After a .com.dbg is compiled, fixupobj.com should be run, so it can apply fixups to the offsets and move the zip directory to the end of the file. Since debug data doesn't get objcopy'd, a new tool has been introduced called zipcopy.com which should be run after objcopy whenever a .com file is created. This is all automated by the `cosmocc` toolchain which is rapidly becoming the new recommended approach. This change also introduces the new C23 checked arithmetic macros.
482 lines
17 KiB
C
482 lines
17 KiB
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/linux/mmap.h"
|
|
#include "ape/sections.internal.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/calls/ucontext.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/fmt/fmt.h"
|
|
#include "libc/intrin/atomic.h"
|
|
#include "libc/intrin/bits.h"
|
|
#include "libc/intrin/kprintf.h"
|
|
#include "libc/intrin/safemacros.internal.h"
|
|
#include "libc/intrin/xchg.internal.h"
|
|
#include "libc/linux/munmap.h"
|
|
#include "libc/log/log.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/stdio/rand.h"
|
|
#include "libc/stdio/stdio.h"
|
|
#include "libc/str/str.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"
|
|
|
|
STATIC_YOINK("zipos");
|
|
|
|
char testlib_enable_tmp_setup_teardown;
|
|
|
|
void SetUpOnce(void) {
|
|
// 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(EINVAL, MAP_FAILED,
|
|
mmap(NULL, 0x800000000000, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE,
|
|
-1, 0));
|
|
ASSERT_SYS(EINVAL, MAP_FAILED,
|
|
mmap(NULL, 0x7fffffffffff, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE,
|
|
-1, 0));
|
|
}
|
|
|
|
TEST(mmap, outOfAutomapRange) {
|
|
ASSERT_SYS(
|
|
ENOMEM, MAP_FAILED,
|
|
mmap(NULL, kAutomapSize, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0));
|
|
}
|
|
|
|
TEST(mmap, noreplaceImage) {
|
|
ASSERT_SYS(EEXIST, MAP_FAILED,
|
|
mmap(__executable_start, FRAMESIZE, PROT_READ,
|
|
MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED_NOREPLACE, -1, 0));
|
|
}
|
|
|
|
TEST(mmap, noreplaceExistingMap) {
|
|
char *p;
|
|
ASSERT_NE(MAP_FAILED, (p = mmap(0, FRAMESIZE, PROT_READ,
|
|
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0)));
|
|
ASSERT_SYS(EEXIST, MAP_FAILED,
|
|
mmap(p, FRAMESIZE, PROT_READ,
|
|
MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED_NOREPLACE, -1, 0));
|
|
EXPECT_SYS(0, 0, munmap(p, FRAMESIZE));
|
|
}
|
|
|
|
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, PAGESIZE, 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, testMapFixed_destroysEverythingInItsPath) {
|
|
unsigned m1 = _mmi.i;
|
|
EXPECT_NE(MAP_FAILED, mmap((void *)(kFixedmapStart + FRAMESIZE * 0),
|
|
FRAMESIZE, PROT_READ | PROT_WRITE,
|
|
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0));
|
|
EXPECT_NE(MAP_FAILED, mmap((void *)(kFixedmapStart + FRAMESIZE * 1),
|
|
FRAMESIZE, PROT_READ | PROT_WRITE,
|
|
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0));
|
|
EXPECT_NE(MAP_FAILED, mmap((void *)(kFixedmapStart + FRAMESIZE * 2),
|
|
FRAMESIZE, PROT_READ | PROT_WRITE,
|
|
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0));
|
|
EXPECT_NE(MAP_FAILED, mmap((void *)(kFixedmapStart + FRAMESIZE * 0),
|
|
FRAMESIZE * 3, PROT_READ | PROT_WRITE,
|
|
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0));
|
|
ASSERT_GT(_mmi.i, m1);
|
|
EXPECT_NE(-1, munmap((void *)kFixedmapStart, FRAMESIZE * 3));
|
|
}
|
|
|
|
#ifdef __x86_64__
|
|
TEST(mmap, customStackMemory_isAuthorized) {
|
|
char *stack;
|
|
uintptr_t w, r;
|
|
ASSERT_NE(MAP_FAILED,
|
|
(stack = mmap(NULL, GetStackSize(), PROT_READ | PROT_WRITE,
|
|
MAP_ANONYMOUS | MAP_STACK, -1, 0)));
|
|
asm("mov\t%%rsp,%0\n\t"
|
|
"mov\t%2,%%rsp\n\t"
|
|
"push\t%3\n\t"
|
|
"pop\t%1\n\t"
|
|
"mov\t%0,%%rsp"
|
|
: "=&r"(w), "=&r"(r)
|
|
: "rm"(stack + GetStackSize() - 8), "i"(123));
|
|
ASSERT_EQ(123, r);
|
|
EXPECT_SYS(0, 0, munmap(stack, GetStackSize()));
|
|
}
|
|
#endif /* __x86_64__ */
|
|
|
|
TEST(mmap, fileOffset) {
|
|
int fd;
|
|
char *map;
|
|
ASSERT_NE(-1, (fd = open("foo", O_CREAT | O_RDWR, 0644)));
|
|
EXPECT_NE(-1, ftruncate(fd, FRAMESIZE * 2));
|
|
EXPECT_NE(-1, pwrite(fd, "hello", 5, FRAMESIZE * 0));
|
|
EXPECT_NE(-1, pwrite(fd, "there", 5, FRAMESIZE * 1));
|
|
EXPECT_NE(-1, fdatasync(fd));
|
|
ASSERT_NE(MAP_FAILED, (map = mmap(NULL, FRAMESIZE, PROT_READ, MAP_PRIVATE, fd,
|
|
FRAMESIZE)));
|
|
EXPECT_EQ(0, memcmp(map, "there", 5), "%#.*s", 5, map);
|
|
EXPECT_NE(-1, munmap(map, FRAMESIZE));
|
|
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, FRAMESIZE));
|
|
EXPECT_NE(-1, pwrite(fd, "hello", 5, 0));
|
|
ASSERT_NE(MAP_FAILED, (map = mmap(NULL, FRAMESIZE, PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE, fd, 0)));
|
|
memcpy(map, "there", 5);
|
|
EXPECT_NE(-1, msync(map, FRAMESIZE, MS_SYNC));
|
|
EXPECT_NE(-1, munmap(map, FRAMESIZE));
|
|
EXPECT_NE(-1, pread(fd, buf, 6, 0));
|
|
EXPECT_EQ(0, memcmp(buf, "hello", 5), "%#.*s", 5, buf);
|
|
EXPECT_NE(-1, close(fd));
|
|
}
|
|
|
|
TEST(mmap, twoPowerSize_automapsAddressWithThatAlignment) {
|
|
char *q, *p;
|
|
// increase the likelihood automap is unaligned w.r.t. following call
|
|
ASSERT_NE(MAP_FAILED, (q = mmap(NULL, 0x00010000, PROT_READ | PROT_WRITE,
|
|
MAP_SHARED | MAP_ANONYMOUS, -1, 0)));
|
|
// ask for a nice big round size
|
|
ASSERT_NE(MAP_FAILED, (p = mmap(NULL, 0x00080000, PROT_READ | PROT_WRITE,
|
|
MAP_SHARED | MAP_ANONYMOUS, -1, 0)));
|
|
// verify it's aligned
|
|
ASSERT_EQ(0, (intptr_t)p & 0x0007ffff);
|
|
EXPECT_SYS(0, 0, munmap(p, 0x00080000));
|
|
}
|
|
|
|
TEST(isheap, nullPtr) {
|
|
ASSERT_FALSE(_isheap(NULL));
|
|
}
|
|
|
|
TEST(isheap, malloc) {
|
|
ASSERT_TRUE(_isheap(_gc(malloc(1))));
|
|
}
|
|
|
|
TEST(isheap, emptyMalloc) {
|
|
ASSERT_TRUE(_isheap(_gc(malloc(0))));
|
|
}
|
|
|
|
TEST(isheap, mallocOffset) {
|
|
char *p = _gc(malloc(131072));
|
|
ASSERT_TRUE(_isheap(p + 100000));
|
|
}
|
|
|
|
static const char *ziposLifePath = "/zip/life.elf";
|
|
TEST(mmap, ziposCannotBeAnonymous) {
|
|
int fd;
|
|
void *p;
|
|
ASSERT_NE(-1, (fd = open(ziposLifePath, O_RDONLY), "%s", ziposLifePath));
|
|
EXPECT_SYS(EINVAL, MAP_FAILED,
|
|
(p = mmap(NULL, 0x00010000, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS,
|
|
fd, 0)));
|
|
close(fd);
|
|
}
|
|
|
|
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, 0x00010000, 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, 0x00010000, PROT_READ, MAP_PRIVATE, fd, 0)));
|
|
EXPECT_STREQN("\177ELF", ((const char *)p), 4);
|
|
EXPECT_NE(-1, munmap(p, 0x00010000));
|
|
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, pid, 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, "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, pid, 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) {
|
|
char *p;
|
|
int pid, ws;
|
|
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, pid, 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 BenchUnmap(void) {
|
|
ASSERT_EQ(0, munmap(ptrs[count++], FRAMESIZE));
|
|
}
|
|
|
|
void BenchMmapPrivate(void) {
|
|
void *p;
|
|
p = mmap(0, FRAMESIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE,
|
|
-1, 0);
|
|
if (p == MAP_FAILED) abort();
|
|
ptrs[count++] = p;
|
|
}
|
|
|
|
BENCH(mmap, bench) {
|
|
EZBENCH2("mmap", donothing, BenchMmapPrivate());
|
|
EZBENCH2("munmap", donothing, BenchUnmap());
|
|
}
|
|
|
|
void BenchUnmapLinux(void) {
|
|
ASSERT_EQ(0, LinuxMunmap(ptrs[count++], FRAMESIZE));
|
|
}
|
|
|
|
void BenchMmapPrivateLinux(void) {
|
|
void *p;
|
|
p = (void *)LinuxMmap(0, FRAMESIZE, PROT_READ | PROT_WRITE,
|
|
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
|
|
if (p == MAP_FAILED) abort();
|
|
ptrs[count++] = p;
|
|
}
|
|
|
|
BENCH(mmap, benchLinux) {
|
|
void *p;
|
|
if (!IsLinux()) return;
|
|
EZBENCH2("mmap (linux)", donothing, BenchMmapPrivateLinux());
|
|
EZBENCH2("munmap (linux)", donothing, BenchUnmapLinux());
|
|
}
|