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Improve cosmo's conformance to libc-test

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This change addresses various open source compatibility issues, so that
we pass 313/411 of the tests in https://github.com/jart/libc-test where
earlier today we were passing about 30/411 of them, due to header toil.
Please note that Glibc only passes 341/411 so 313 today is pretty good!

- Make the conformance of libc/isystem/ headers nearly perfect
- Import more of the remaining math library routines from Musl
- Fix inconsistencies with type signatures of calls like umask
- Write tests for getpriority/setpriority which work great now
- conform to `struct sockaddr *` on remaining socket functions
- Import a bunch of uninteresting stdlib functions e.g. rand48
- Introduce readdir_r, scandir, pthread_kill, sigsetjmp, etc..

Follow the instructions in our `tool/scripts/cosmocc` toolchain to run
these tests yourself. You use `make CC=cosmocc` on the test repository
This commit is contained in:
Justine Tunney 2022-10-10 17:52:41 -07:00
parent 467a332e38
commit e557058ac8
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GPG key ID: BE714B4575D6E328
189 changed files with 5091 additions and 884 deletions
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50
libc/calls/getpriority.c
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@ -17,10 +17,13 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/intrin/strace.internal.h"
#include "libc/calls/syscall-nt.internal.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/asmflag.h"
#include "libc/intrin/describeflags.internal.h"
#include "libc/intrin/strace.internal.h"
#include "libc/limits.h"
/**
* Returns nice value of thing.
@ -29,20 +32,47 @@
* to clear `errno` beforehand and see if it changed, in order to truly
* determine if an error happened.
*
* @param which can be PRIO_PROCESS, PRIO_PGRP, PRIO_USER
* On Windows, there's only six priority classes. We define them as -16
* (realtime), -10 (high), -5 (above), 0 (normal), 5 (below), 15 (idle)
* which are the only values that'll roundtrip getpriority/setpriority.
*
* @param which can be one of:
* - `PRIO_PROCESS` is supported universally
* - `PRIO_PGRP` is supported on unix
* - `PRIO_USER` is supported on unix
* @param who is the pid, pgid, or uid (0 means current)
* @return value ∈ [-NZERO,NZERO) or -1 w/ errno
* @see setpriority(), nice()
* @raise EINVAL if `which` was invalid or unsupported
* @raise EPERM if access to process was denied
* @raise ESRCH if no such process existed
* @see setpriority()
*/
int getpriority(int which, unsigned who) {
privileged int getpriority(int which, unsigned who) {
int rc;
if (!IsWindows()) {
if ((rc = sys_getpriority(which, who)) != -1) {
rc = 20 - rc;
char cf;
if (IsLinux()) {
asm volatile("syscall"
: "=a"(rc)
: "0"(140), "D"(which), "S"(who)
: "rcx", "r11", "memory");
if (rc >= 0) {
rc = NZERO - rc;
} else {
errno = -rc;
rc = -1;
}
} else if (IsBsd()) {
asm volatile(CFLAG_ASM("syscall")
: CFLAG_CONSTRAINT(cf), "=a"(rc)
: "1"((IsXnu() ? 0x2000000 : 0) | 100), "D"(which), "S"(who)
: "rcx", "rdx", "r8", "r9", "r10", "r11", "memory");
if (cf) {
errno = rc;
rc = -1;
}
} else {
rc = sys_getsetpriority_nt(which, who, 0, sys_getpriority_nt);
rc = sys_getpriority_nt(which, who);
}
STRACE("getpriority(%d, %u) → %d% m", which, who, rc);
STRACE("getpriority(%s, %u) → %d% m", DescribeWhichPrio(which), who, rc);
return rc;
}