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Simplify memory manager

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Justine Tunney 2024-07-04 10:52:16 -07:00
parent 5a9a08d1cf
commit 01587de761
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GPG key ID: BE714B4575D6E328
40 changed files with 451 additions and 311 deletions
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44
test/libc/intrin/mmap_test.c
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@ -60,9 +60,11 @@
__static_yoink("zipos");
int pagesz;
int granularity;
void SetUpOnce(void) {
pagesz = getpagesize();
granularity = __granularity();
testlib_enable_tmp_setup_teardown();
// ASSERT_SYS(0, 0, pledge("stdio rpath wpath cpath proc", 0));
@ -84,27 +86,41 @@ TEST(mmap, overflow) {
TEST(mmap, noreplaceImage) {
ASSERT_SYS(EEXIST, MAP_FAILED,
mmap(__executable_start, granularity, PROT_READ,
mmap(__executable_start, 1, 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_NE(MAP_FAILED,
(p = mmap(0, 1, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0)));
ASSERT_SYS(EEXIST, MAP_FAILED,
mmap(p, granularity, PROT_READ,
mmap(p, 1, PROT_READ,
MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED_NOREPLACE, -1, 0));
EXPECT_SYS(0, 0, munmap(p, granularity));
EXPECT_SYS(0, 0, munmap(p, 1));
}
TEST(mmap, pageBeyondGone) {
int pagesz = getpagesize();
char *p = mmap(0, pagesz * 2, PROT_READ | PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
ASSERT_EQ(0, munmap(p, pagesz * 2));
p = mmap(p, 1, PROT_READ | PROT_WRITE,
MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
ASSERT_NE(MAP_FAILED, p);
EXPECT_TRUE(testlib_memoryexists(p));
EXPECT_TRUE(testlib_memoryexists(p + pagesz - 1));
EXPECT_FALSE(testlib_memoryexists(p + pagesz));
ASSERT_EQ(0, munmap(p, 1));
}
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,
ASSERT_NE(MAP_FAILED,
(p = mmap(0, 1, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0)));
ASSERT_NE(MAP_FAILED, mmap(p, 1, PROT_READ,
MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0));
EXPECT_SYS(0, 0, munmap(p, granularity));
EXPECT_SYS(0, 0, munmap(p, 1));
}
TEST(mmap, hint) {
@ -181,7 +197,7 @@ TEST(mmap, testMapFile_fdGetsClosed_makesNoDifference) {
EXPECT_NE(-1, close(fd));
EXPECT_STREQN("hello", p, 5);
p[1] = 'a';
EXPECT_NE(-1, msync(p, getauxval(AT_PAGESZ), MS_SYNC));
EXPECT_NE(-1, msync(p, getpagesize(), MS_SYNC));
ASSERT_NE(-1, (fd = open(path, O_RDONLY)));
EXPECT_EQ(5, read(fd, buf, 5));
EXPECT_STREQN("hallo", buf, 5);
@ -193,7 +209,7 @@ TEST(mmap, testMapFile_fdGetsClosed_makesNoDifference) {
TEST(mmap, fileOffset) {
int fd;
char *map;
int offset_align = IsWindows() ? granularity : getauxval(AT_PAGESZ);
int offset_align = IsWindows() ? granularity : getpagesize();
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));
@ -433,15 +449,15 @@ void *ptrs[N];
void BenchMmapPrivate(void) {
void *p;
p = mmap(0, granularity, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE,
-1, 0);
p = mmap(0, granularity * 10, 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))
if (munmap(ptrs[--count], granularity * 10))
__builtin_trap();
}