apps/CMakeLists.txt

@@ -30,4 +30,3 @@ luna_app(ps.cpp ps)
 luna_app(time.cpp time)
 luna_app(ln.cpp ln)
 luna_app(mktemp.cpp mktemp)
-luna_app(sysfuzz.cpp sysfuzz)

apps/sysfuzz.cpp

@@ -1,73 +0,0 @@
-#include <luna/Syscall.h>
-#include <os/ArgumentParser.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
-
-static const char* syscall_list[] = {
-#undef __enumerate
-#define __enumerate(name) #name,
-    enumerate_syscalls(__enumerate)
-#undef __enumerate
-};
-
-int random_syscall()
-{
-    int sys;
-
-    while (true)
-    {
-        sys = rand() % Syscalls::__count;
-        if (sys == SYS_exit || sys == SYS_usleep || sys == SYS_fork) continue;
-        break;
-    }
-
-    return sys;
-}
-
-void random_args(int args[5])
-{
-    for (int i = 0; i < 5; i++) { args[i] = rand(); }
-}
-
-int main(int argc, char** argv)
-{
-    StringView times_sv = "20"_sv;
-    StringView interval_sv = "1000"_sv;
-
-    os::ArgumentParser parser;
-    parser.add_description("System call fuzzer (invokes system calls with random arguments to test system stability)");
-    parser.add_system_program_info("sysfuzz"_sv);
-    parser.add_value_argument(times_sv, 't', "times"_sv, true, "the number of syscalls to invoke"_sv);
-    parser.add_value_argument(interval_sv, 'i', "interval"_sv, true,
-                              "the interval between system calls (in milliseconds)"_sv);
-    parser.parse(argc, argv);
-
-    srand((unsigned)time(nullptr));
-
-    int times = atoi(times_sv.chars());
-    int interval = atoi(interval_sv.chars());
-
-    while (times--)
-    {
-        int args[5];
-        int sys = random_syscall();
-        random_args(args);
-
-        printf("%s(%d, %d, %d, %d, %d) -> ", syscall_list[sys], args[0], args[1], args[2], args[3], args[4]);
-
-        long rc = syscall(sys, args[0], args[1], args[2], args[3], args[4]);
-
-        if (rc < 0)
-        {
-            int error = (int)-rc;
-            printf("%ld (%s)\n", rc, strerror(error));
-        }
-        else
-            printf("%ld\n", rc);
-
-        usleep(interval * 1000);
-    }
-}

kernel/src/sys/usleep.cpp

@@ -6,9 +6,6 @@ Result<u64> sys_usleep(Registers*, SyscallArgs args)
 {
     useconds_t us = (useconds_t)args[0];
 
-    // FIXME: Allow usleep() to use a more precise resolution.
-    if (us < 1000) return 0;
-
     kernel_sleep(us / 1000);
 
     return 0;

kernel/src/thread/Scheduler.cpp

@@ -271,7 +271,7 @@ namespace Scheduler
         {
             if (thread->state == ThreadState::Sleeping)
             {
-                if (thread->sleep_ticks_left == 0 || --thread->sleep_ticks_left == 0) thread->wake_up();
+                if (--thread->sleep_ticks_left == 0) thread->wake_up();
             }
         }