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Improve build latency

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Justine Tunney 2024-07-31 01:21:27 -07:00
parent 8d8aecb6d9
commit 4ed4a1095a
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7 changed files with 247 additions and 222 deletions
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144
test/libc/calls/open_test.c
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@ -326,120 +326,6 @@ TEST(open, lotsOfFds) {
}
}
static int64_t GetInode(const char *path) {
struct stat st;
ASSERT_SYS(0, 0, stat(path, &st));
return st.st_ino;
}
TEST(open, drive) {
if (!IsWindows())
return;
ASSERT_NE(GetInode("/"), GetInode("."));
ASSERT_EQ(GetInode("/"), GetInode("/c")); // sorry you have to run on c:/
ASSERT_EQ(GetInode("/"), GetInode("/c/"));
ASSERT_SYS(0, 3, open("/", O_RDONLY));
ASSERT_SYS(0, 0, close(3));
}
TEST(open, readOnlyCreatMode) {
char buf[8];
struct stat st;
ASSERT_SYS(0, 3, open("x", O_RDWR | O_CREAT | O_TRUNC, 0500));
ASSERT_SYS(0, 2, pwrite(3, "MZ", 2, 0));
ASSERT_SYS(0, 2, pread(3, buf, 8, 0));
ASSERT_SYS(0, 0, close(3));
ASSERT_SYS(0, 0, stat("x", &st));
ASSERT_EQ(0100500, st.st_mode);
if (getuid()) {
ASSERT_SYS(EACCES, -1, open("x", O_RDWR));
ASSERT_SYS(EACCES, -1, open("x", O_RDWR | O_CREAT, 0666));
} else {
// root is invulnerable to eacces
ASSERT_SYS(0, 3, open("x", O_RDWR));
ASSERT_SYS(0, 0, close(3));
ASSERT_SYS(0, 3, open("x", O_RDWR | O_CREAT, 0666));
ASSERT_SYS(0, 0, close(3));
SPAWN(fork);
setuid(1000);
setgid(1000);
ASSERT_SYS(EACCES, -1, open("x", O_RDWR));
ASSERT_SYS(EACCES, -1, open("x", O_RDWR | O_CREAT, 0666));
EXITS(0);
}
}
TEST(open, parentSymlink) {
struct stat st;
ASSERT_SYS(0, 0, mkdir("parent", 0755));
// create directory symlink
ASSERT_SYS(0, 0, symlink("parent", "parent-link"));
// test the symlink we just made is a symlink
ASSERT_SYS(0, 0, lstat("parent-link", &st));
ASSERT_TRUE(S_ISLNK(st.st_mode));
// create regular file when parent component is symlink dir
ASSERT_SYS(0, 0, touch("parent-link/regular", 0644));
// test stat works
ASSERT_SYS(0, 0, stat("parent-link/regular", &st));
ASSERT_TRUE(S_ISREG(st.st_mode));
// test open works
ASSERT_SYS(0, 3, open("parent-link/regular", O_RDONLY));
ASSERT_SYS(0, 0, fstat(3, &st));
ASSERT_TRUE(S_ISREG(st.st_mode));
ASSERT_SYS(0, 0, close(3));
// test O_NOFOLLOW doesn't apply to parent components
ASSERT_SYS(0, 3, open("parent-link/regular", O_RDONLY | O_NOFOLLOW));
ASSERT_SYS(0, 0, fstat(3, &st));
ASSERT_TRUE(S_ISREG(st.st_mode));
ASSERT_SYS(0, 0, close(3));
// create regular symlink
ASSERT_SYS(0, 0, symlink("regular", "parent-link/regular-link"));
// test stat works
ASSERT_SYS(0, 0, stat("parent-link/regular-link", &st));
ASSERT_TRUE(S_ISREG(st.st_mode));
ASSERT_SYS(0, 0, lstat("parent-link/regular-link", &st));
ASSERT_TRUE(S_ISLNK(st.st_mode));
// test open works
ASSERT_SYS(0, 3, open("parent-link/regular-link", O_RDONLY));
ASSERT_SYS(0, 0, fstat(3, &st));
ASSERT_TRUE(S_ISREG(st.st_mode));
ASSERT_SYS(0, 0, close(3));
// test O_NOFOLLOW applies to last component
ASSERT_SYS(ELOOP, -1,
open("parent-link/regular-link", O_RDONLY | O_NOFOLLOW));
}
TEST(open, readonlyCreateMode_dontChangeStatusIfExists) {
char buf[8];
struct stat st;
ASSERT_SYS(0, 3, creat("wut", 0700));
ASSERT_SYS(0, 2, pwrite(3, "MZ", 2, 0));
ASSERT_SYS(0, 0, close(3));
// since the file already exists, unix doesn't change read-only
ASSERT_SYS(0, 3, open("wut", O_CREAT | O_TRUNC | O_RDWR, 0500));
ASSERT_SYS(0, 0, pread(3, buf, 8, 0));
ASSERT_SYS(0, 0, fstat(3, &st));
ASSERT_EQ(0100600, st.st_mode & 0700666);
ASSERT_SYS(0, 0, close(3));
}
TEST(open, creatRdonly) {
char buf[8];
ASSERT_SYS(EINVAL, -1, open("foo", O_CREAT | O_TRUNC | O_RDONLY, 0700));
ASSERT_SYS(0, 3, open("foo", O_CREAT | O_RDONLY, 0700));
ASSERT_SYS(EBADF, -1, pwrite(3, "MZ", 2, 0));
ASSERT_SYS(0, 0, pread(3, buf, 8, 0));
ASSERT_SYS(0, 0, close(3));
}
TEST(open, sequentialRandom_EINVAL) {
if (!IsWindows())
return;
ASSERT_SYS(
EINVAL, -1,
open("foo", O_CREAT | O_TRUNC | O_RDWR | O_SEQUENTIAL | O_RANDOM, 0700));
}
// "If O_CREAT is set and the file did not previously exist, upon
// successful completion, open() shall mark for update the last data
// access, last data modification, and last file status change
@ -485,33 +371,3 @@ TEST(open, trunc_touchesMtimCtim) {
EXPECT_EQ(1, timespec_cmp(st.st_mtim, birth));
ASSERT_SYS(0, 0, close(3));
}
TEST(open, mereOpen_doesntTouch) {
struct stat st;
struct timespec birth;
ASSERT_SYS(0, 0, touch("regular", 0755));
ASSERT_SYS(0, 0, stat("regular", &st));
birth = st.st_ctim;
sleep(2);
ASSERT_SYS(0, 3, open("regular", O_RDWR));
ASSERT_SYS(0, 0, close(3));
ASSERT_SYS(0, 0, stat("regular", &st));
EXPECT_EQ(0, timespec_cmp(st.st_ctim, birth));
#if 0 // todo: why flake on rhel7?
EXPECT_EQ(0, timespec_cmp(st.st_mtim, birth));
EXPECT_EQ(0, timespec_cmp(st.st_atim, birth));
#endif
}
TEST(open, canTruncateExistingFile) {
struct stat st;
ASSERT_SYS(0, 0, xbarf("foo", "hello", -1));
ASSERT_SYS(0, 0, stat("foo", &st));
ASSERT_EQ(5, st.st_size);
ASSERT_SYS(0, 3, open("foo", O_RDWR | O_TRUNC));
ASSERT_SYS(0, 0, fstat(3, &st));
ASSERT_EQ(0, st.st_size);
ASSERT_SYS(0, 0, close(3));
ASSERT_SYS(0, 0, stat("foo", &st));
ASSERT_EQ(0, st.st_size);
}