mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-15 10:47:56 +00:00
f7780de24b
Cosmopolitan now supports mremap(), which is only supported on Linux and NetBSD. First, it allows memory mappings to be relocated without copying them; this can dramatically speed up data structures like std::vector if the array size grows larger than 256kb. The mremap() system call is also 10x faster than munmap() when shrinking large memory mappings. There's now two functions, getpagesize() and getgransize() which help to write portable code that uses mmap(MAP_FIXED). Alternative sysconf() may be called with our new _SC_GRANSIZE. The madvise() system call now has a better wrapper with improved documentation.
247 lines
8.4 KiB
C
247 lines
8.4 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 2021 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 "dsp/core/core.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/calls/struct/rlimit.h"
|
|
#include "libc/calls/struct/timespec.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/intrin/directmap.internal.h"
|
|
#include "libc/intrin/safemacros.internal.h"
|
|
#include "libc/limits.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/stdio/rand.h"
|
|
#include "libc/stdio/stdio.h"
|
|
#include "libc/sysv/consts/auxv.h"
|
|
#include "libc/sysv/consts/map.h"
|
|
#include "libc/sysv/consts/o.h"
|
|
#include "libc/sysv/consts/prot.h"
|
|
#include "libc/sysv/consts/rlimit.h"
|
|
#include "libc/sysv/consts/sig.h"
|
|
#include "libc/testlib/testlib.h"
|
|
#include "libc/time.h"
|
|
#include "libc/x/xsigaction.h"
|
|
#include "libc/x/xspawn.h"
|
|
|
|
#ifdef __x86_64__
|
|
|
|
#define MEM (64 * 1024 * 1024)
|
|
|
|
static char tmpname[PATH_MAX];
|
|
|
|
void OnSigxcpu(int sig) {
|
|
ASSERT_EQ(SIGXCPU, sig);
|
|
_Exit(0);
|
|
}
|
|
|
|
void OnSigxfsz(int sig) {
|
|
unlink(tmpname);
|
|
ASSERT_EQ(SIGXFSZ, sig);
|
|
_Exit(0);
|
|
}
|
|
|
|
TEST(setrlimit, testCpuLimit) {
|
|
int wstatus;
|
|
struct rlimit rlim;
|
|
struct timespec start;
|
|
double matrices[3][3][3];
|
|
if (IsWindows())
|
|
return; // of course it doesn't work on windows
|
|
if (IsXnu())
|
|
return; // TODO(jart): it worked before
|
|
if (IsOpenbsd())
|
|
return; // TODO(jart): fix flake
|
|
ASSERT_NE(-1, (wstatus = xspawn(0)));
|
|
if (wstatus == -2) {
|
|
ASSERT_EQ(0, xsigaction(SIGXCPU, OnSigxcpu, 0, 0, 0));
|
|
ASSERT_EQ(0, getrlimit(RLIMIT_CPU, &rlim));
|
|
rlim.rlim_cur = 1; // set soft limit to one second
|
|
ASSERT_EQ(0, setrlimit(RLIMIT_CPU, &rlim));
|
|
start = timespec_real();
|
|
do {
|
|
matmul3(matrices[0], matrices[1], matrices[2]);
|
|
matmul3(matrices[0], matrices[1], matrices[2]);
|
|
matmul3(matrices[0], matrices[1], matrices[2]);
|
|
matmul3(matrices[0], matrices[1], matrices[2]);
|
|
} while (timespec_sub(timespec_real(), start).tv_sec < 5);
|
|
_Exit(1);
|
|
}
|
|
EXPECT_TRUE(WIFEXITED(wstatus));
|
|
EXPECT_FALSE(WIFSIGNALED(wstatus));
|
|
EXPECT_EQ(0, WEXITSTATUS(wstatus));
|
|
EXPECT_EQ(0, WTERMSIG(wstatus));
|
|
}
|
|
|
|
TEST(setrlimit, testFileSizeLimit) {
|
|
char junkdata[512];
|
|
int i, fd, wstatus;
|
|
struct rlimit rlim;
|
|
if (IsWindows())
|
|
return; /* of course it doesn't work on windows */
|
|
ASSERT_NE(-1, (wstatus = xspawn(0)));
|
|
if (wstatus == -2) {
|
|
ASSERT_EQ(0, xsigaction(SIGXFSZ, OnSigxfsz, 0, 0, 0));
|
|
ASSERT_EQ(0, getrlimit(RLIMIT_FSIZE, &rlim));
|
|
rlim.rlim_cur = 1024 * 1024; /* set soft limit to one megabyte */
|
|
ASSERT_EQ(0, setrlimit(RLIMIT_FSIZE, &rlim));
|
|
snprintf(tmpname, sizeof(tmpname), "%s/%s.%d",
|
|
firstnonnull(getenv("TMPDIR"), "/tmp"),
|
|
firstnonnull(program_invocation_short_name, "unknown"), getpid());
|
|
ASSERT_NE(-1, (fd = open(tmpname, O_RDWR | O_CREAT | O_TRUNC, 0644)));
|
|
rngset(junkdata, 512, _rand64, -1);
|
|
for (i = 0; i < 5 * 1024 * 1024 / 512; ++i) {
|
|
ASSERT_EQ(512, write(fd, junkdata, 512));
|
|
}
|
|
close(fd);
|
|
unlink(tmpname);
|
|
_Exit(1);
|
|
}
|
|
EXPECT_TRUE(WIFEXITED(wstatus));
|
|
EXPECT_FALSE(WIFSIGNALED(wstatus));
|
|
EXPECT_EQ(0, WEXITSTATUS(wstatus));
|
|
EXPECT_EQ(0, WTERMSIG(wstatus));
|
|
}
|
|
|
|
int SetMemoryLimit(size_t n) {
|
|
struct rlimit rlim = {0};
|
|
getrlimit(RLIMIT_AS, &rlim);
|
|
rlim.rlim_cur = n;
|
|
rlim.rlim_max = n;
|
|
return setrlimit(RLIMIT_AS, &rlim);
|
|
}
|
|
|
|
TEST(setrlimit, testMemoryLimit) {
|
|
char *p;
|
|
bool gotsome;
|
|
int i, wstatus;
|
|
ASSERT_NE(-1, (wstatus = xspawn(0)));
|
|
if (wstatus == -2) {
|
|
ASSERT_EQ(0, SetMemoryLimit(MEM));
|
|
for (gotsome = false, i = 0; i < (MEM * 2) / getpagesize(); ++i) {
|
|
p = mmap(0, getpagesize(), PROT_READ | PROT_WRITE,
|
|
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
|
|
if (p != MAP_FAILED) {
|
|
gotsome = true;
|
|
} else {
|
|
ASSERT_TRUE(gotsome);
|
|
ASSERT_EQ(ENOMEM, errno);
|
|
_Exit(0);
|
|
}
|
|
rngset(p, getpagesize(), _rand64, -1);
|
|
}
|
|
_Exit(1);
|
|
}
|
|
EXPECT_TRUE(WIFEXITED(wstatus));
|
|
EXPECT_FALSE(WIFSIGNALED(wstatus));
|
|
EXPECT_EQ(0, WEXITSTATUS(wstatus));
|
|
EXPECT_EQ(0, WTERMSIG(wstatus));
|
|
}
|
|
|
|
TEST(setrlimit, testVirtualMemoryLimit) {
|
|
char *p;
|
|
int i, wstatus;
|
|
ASSERT_NE(-1, (wstatus = xspawn(0)));
|
|
if (wstatus == -2) {
|
|
ASSERT_EQ(0, setrlimit(RLIMIT_AS, &(struct rlimit){MEM, MEM}));
|
|
for (i = 0; i < (MEM * 2) / getpagesize(); ++i) {
|
|
p = sys_mmap(0, getpagesize(), PROT_READ | PROT_WRITE,
|
|
MAP_ANONYMOUS | MAP_PRIVATE | MAP_POPULATE, -1, 0)
|
|
.addr;
|
|
if (p == MAP_FAILED) {
|
|
ASSERT_EQ(ENOMEM, errno);
|
|
_Exit(0);
|
|
}
|
|
rngset(p, getpagesize(), _rand64, -1);
|
|
}
|
|
_Exit(1);
|
|
}
|
|
EXPECT_TRUE(WIFEXITED(wstatus));
|
|
EXPECT_FALSE(WIFSIGNALED(wstatus));
|
|
EXPECT_EQ(0, WEXITSTATUS(wstatus));
|
|
EXPECT_EQ(0, WTERMSIG(wstatus));
|
|
}
|
|
|
|
TEST(setrlimit, testDataMemoryLimit) {
|
|
char *p;
|
|
int i, wstatus;
|
|
if (IsXnu())
|
|
return; /* doesn't work on darwin */
|
|
if (IsNetbsd())
|
|
return; /* doesn't work on netbsd */
|
|
if (IsFreebsd())
|
|
return; /* doesn't work on freebsd */
|
|
if (IsLinux())
|
|
return; /* doesn't work on gnu/systemd */
|
|
if (IsWindows())
|
|
return; /* of course it doesn't work on windows */
|
|
ASSERT_NE(-1, (wstatus = xspawn(0)));
|
|
if (wstatus == -2) {
|
|
ASSERT_EQ(0, setrlimit(RLIMIT_DATA, &(struct rlimit){MEM, MEM}));
|
|
for (i = 0; i < (MEM * 2) / getpagesize(); ++i) {
|
|
p = sys_mmap(0, getpagesize(), PROT_READ | PROT_WRITE,
|
|
MAP_ANONYMOUS | MAP_PRIVATE | MAP_POPULATE, -1, 0)
|
|
.addr;
|
|
if (p == MAP_FAILED) {
|
|
ASSERT_EQ(ENOMEM, errno);
|
|
_Exit(0);
|
|
}
|
|
rngset(p, getpagesize(), _rand64, -1);
|
|
}
|
|
_Exit(1);
|
|
}
|
|
EXPECT_TRUE(WIFEXITED(wstatus));
|
|
EXPECT_FALSE(WIFSIGNALED(wstatus));
|
|
EXPECT_EQ(0, WEXITSTATUS(wstatus));
|
|
EXPECT_EQ(0, WTERMSIG(wstatus));
|
|
}
|
|
|
|
TEST(setrlimit, testPhysicalMemoryLimit) {
|
|
/* RLIMIT_RSS doesn't work on gnu/systemd */
|
|
/* RLIMIT_RSS doesn't work on darwin */
|
|
/* RLIMIT_RSS doesn't work on freebsd */
|
|
/* RLIMIT_RSS doesn't work on netbsd */
|
|
/* RLIMIT_RSS doesn't work on openbsd */
|
|
/* of course it doesn't work on windows */
|
|
}
|
|
|
|
wontreturn void OnVfork(void *ctx) {
|
|
struct rlimit *rlim;
|
|
rlim = ctx;
|
|
rlim->rlim_cur -= 1;
|
|
ASSERT_EQ(0, getrlimit(RLIMIT_CPU, rlim));
|
|
_Exit(0);
|
|
}
|
|
|
|
TEST(setrlimit, isVforkSafe) {
|
|
int ws;
|
|
struct rlimit rlim[2];
|
|
if (IsWindows())
|
|
return; /* of course it doesn't work on windows */
|
|
ASSERT_EQ(0, getrlimit(RLIMIT_CPU, rlim));
|
|
ASSERT_NE(-1, (ws = xvspawn(OnVfork, rlim, 0)));
|
|
EXPECT_TRUE(WIFEXITED(ws));
|
|
EXPECT_FALSE(WIFSIGNALED(ws));
|
|
EXPECT_EQ(0, WEXITSTATUS(ws));
|
|
EXPECT_EQ(0, WTERMSIG(ws));
|
|
ASSERT_EQ(0, getrlimit(RLIMIT_CPU, rlim + 1));
|
|
EXPECT_EQ(rlim[0].rlim_cur, rlim[1].rlim_cur);
|
|
EXPECT_EQ(rlim[0].rlim_max, rlim[1].rlim_max);
|
|
}
|
|
|
|
#endif /* __x86_64__ */
|