ladybird/Userland/Utilities/tt.cpp

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/ArgsParser.h>
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#include <LibMain/Main.h>
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
static int mutex_test();
static int detached_test();
static int priority_test();
static int stack_size_test();
static int staying_alive_test();
static int set_stack_test();
static int kill_test();
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ErrorOr<int> serenity_main(Main::Arguments arguments)
{
StringView test_name = "n"sv;
Core::ArgsParser args_parser;
args_parser.set_general_help(
"Exercise error-handling and edge-case paths of the execution environment "
"(i.e., Kernel or UE) by doing unusual thread-related things.");
args_parser.add_positional_argument(test_name, "Test to run (m = mutex, d = detached, p = priority, s = stack size, t = simple thread test, x = set stack, k = kill, nothing = join race)", "test-name", Core::ArgsParser::Required::No);
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args_parser.parse(arguments);
if (test_name[0] == 'm')
return mutex_test();
if (test_name[0] == 'd')
return detached_test();
if (test_name[0] == 'p')
return priority_test();
if (test_name[0] == 's')
return stack_size_test();
if (test_name[0] == 't')
return staying_alive_test();
if (test_name[0] == 'x')
return set_stack_test();
if (test_name[0] == 'k')
return kill_test();
if (test_name[0] != 'n') {
args_parser.print_usage(stdout, arguments.strings[0]);
return 1;
}
outln("Hello from the first thread!");
pthread_t thread_id;
int rc = pthread_create(
&thread_id, nullptr, [](void*) -> void* {
outln("Hi there, from the second thread!");
pthread_exit((void*)0xDEADBEEF);
},
nullptr);
if (rc < 0) {
perror("pthread_create");
return 1;
}
void* retval;
rc = pthread_join(thread_id, &retval);
if (rc < 0) {
perror("pthread_join");
return 1;
}
outln("Okay, joined and got retval={}", retval);
return 0;
}
static pthread_mutex_t mutex;
int mutex_test()
{
int rc = pthread_mutex_init(&mutex, nullptr);
if (rc < 0) {
perror("pthread_mutex_init");
return 1;
}
pthread_t thread_id;
rc = pthread_create(
&thread_id, nullptr, [](void*) -> void* {
outln("I'm the secondary thread :^)");
for (;;) {
pthread_mutex_lock(&mutex);
outln("Second thread stole mutex");
sleep(1);
outln("Second thread giving back mutex");
pthread_mutex_unlock(&mutex);
sleep(1);
}
},
nullptr);
if (rc < 0) {
perror("pthread_create");
return 1;
}
for (;;) {
pthread_mutex_lock(&mutex);
outln("Obnoxious spam!");
pthread_mutex_unlock(&mutex);
usleep(10000);
}
}
int detached_test()
{
pthread_attr_t attributes;
int rc = pthread_attr_init(&attributes);
if (rc != 0) {
outln("pthread_attr_init: {}", strerror(rc));
return 1;
}
int detach_state = 99; // clearly invalid
rc = pthread_attr_getdetachstate(&attributes, &detach_state);
if (rc != 0) {
outln("pthread_attr_getdetachstate: {}", strerror(rc));
return 2;
}
outln("Default detach state: {}", detach_state == PTHREAD_CREATE_JOINABLE ? "joinable" : "detached");
detach_state = PTHREAD_CREATE_DETACHED;
rc = pthread_attr_setdetachstate(&attributes, detach_state);
if (rc != 0) {
outln("pthread_attr_setdetachstate: {}", strerror(rc));
return 3;
}
outln("Set detach state on new thread to detached");
pthread_t thread_id;
rc = pthread_create(
&thread_id, &attributes, [](void*) -> void* {
outln("I'm the secondary thread :^)");
sleep(1);
pthread_exit((void*)0xDEADBEEF);
},
nullptr);
if (rc != 0) {
outln("pthread_create: {}", strerror(rc));
return 4;
}
void* ret_val;
rc = pthread_join(thread_id, &ret_val);
if (rc != 0 && rc != EINVAL) {
outln("pthread_join: {}", strerror(rc));
return 5;
}
if (rc != EINVAL) {
outln("Expected EINVAL! Thread was joinable?");
return 6;
}
sleep(2);
outln("Thread was created detached. I sure hope it exited on its own.");
rc = pthread_attr_destroy(&attributes);
if (rc != 0) {
outln("pthread_attr_destroy: {}", strerror(rc));
return 7;
}
return 0;
}
int priority_test()
{
pthread_attr_t attributes;
int rc = pthread_attr_init(&attributes);
if (rc != 0) {
outln("pthread_attr_init: {}", strerror(rc));
return 1;
}
struct sched_param sched_params;
rc = pthread_attr_getschedparam(&attributes, &sched_params);
if (rc != 0) {
outln("pthread_attr_getschedparam: {}", strerror(rc));
return 2;
}
outln("Default priority: {}", sched_params.sched_priority);
sched_params.sched_priority = 3;
rc = pthread_attr_setschedparam(&attributes, &sched_params);
if (rc != 0) {
outln("pthread_attr_setschedparam: {}", strerror(rc));
return 3;
}
outln("Set thread priority to 3");
pthread_t thread_id;
rc = pthread_create(
&thread_id, &attributes, [](void*) -> void* {
outln("I'm the secondary thread :^)");
sleep(1);
pthread_exit((void*)0xDEADBEEF);
},
nullptr);
if (rc < 0) {
perror("pthread_create");
return 4;
}
rc = pthread_join(thread_id, nullptr);
if (rc < 0) {
perror("pthread_join");
return 5;
}
rc = pthread_attr_destroy(&attributes);
if (rc != 0) {
outln("pthread_attr_destroy: {}", strerror(rc));
return 6;
}
return 0;
}
int stack_size_test()
{
pthread_attr_t attributes;
int rc = pthread_attr_init(&attributes);
if (rc != 0) {
outln("pthread_attr_init: {}", strerror(rc));
return 1;
}
size_t stack_size;
rc = pthread_attr_getstacksize(&attributes, &stack_size);
if (rc != 0) {
outln("pthread_attr_getstacksize: {}", strerror(rc));
return 2;
}
outln("Default stack size: {}", stack_size);
stack_size = 8 * 1024 * 1024;
rc = pthread_attr_setstacksize(&attributes, stack_size);
if (rc != 0) {
outln("pthread_attr_setstacksize: {}", strerror(rc));
return 3;
}
outln("Set thread stack size to 8 MiB");
pthread_t thread_id;
rc = pthread_create(
&thread_id, &attributes, [](void*) -> void* {
outln("I'm the secondary thread :^)");
sleep(1);
pthread_exit((void*)0xDEADBEEF);
},
nullptr);
if (rc < 0) {
perror("pthread_create");
return 4;
}
rc = pthread_join(thread_id, nullptr);
if (rc < 0) {
perror("pthread_join");
return 5;
}
rc = pthread_attr_destroy(&attributes);
if (rc != 0) {
outln("pthread_attr_destroy: {}", strerror(rc));
return 6;
}
return 0;
}
int staying_alive_test()
{
pthread_t thread_id;
int rc = pthread_create(
&thread_id, nullptr, [](void*) -> void* {
outln("I'm the secondary thread :^)");
sleep(20);
outln("Secondary thread is still alive");
sleep(3520);
outln("Secondary thread exiting");
pthread_exit((void*)0xDEADBEEF);
},
nullptr);
if (rc < 0) {
perror("pthread_create");
return 1;
}
sleep(1);
outln("I'm the main thread :^)");
sleep(3600);
outln("Main thread exiting");
return 0;
}
int set_stack_test()
{
pthread_attr_t attributes;
int rc = pthread_attr_init(&attributes);
if (rc < 0) {
outln("pthread_attr_init: {}", strerror(rc));
return 1;
}
size_t stack_size = 8 * 1024 * 1024;
void* stack_addr = mmap_with_name(nullptr, stack_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, 0, 0, "Cool stack");
if (!stack_addr) {
perror("mmap_with_name");
return -1;
}
rc = pthread_attr_setstack(&attributes, stack_addr, stack_size);
if (rc != 0) {
outln("pthread_attr_setstack: {}", strerror(rc));
return 2;
}
outln("Set thread stack to {:p}, size {}", stack_addr, stack_size);
size_t stack_size_verify;
void* stack_addr_verify;
rc = pthread_attr_getstack(&attributes, &stack_addr_verify, &stack_size_verify);
if (rc != 0) {
outln("pthread_attr_getstack: {}", strerror(rc));
return 3;
}
if (stack_addr != stack_addr_verify || stack_size != stack_size_verify) {
outln("Stack address and size don't match! addr: {:p} {:p}, size: {} {}", stack_addr, stack_addr_verify, stack_size, stack_size_verify);
return 4;
}
pthread_t thread_id;
rc = pthread_create(
&thread_id, &attributes, [](void*) -> void* {
outln("I'm the secondary thread :^)");
sleep(1);
pthread_exit((void*)0xDEADBEEF);
},
nullptr);
if (rc < 0) {
perror("pthread_create");
return 5;
}
rc = pthread_join(thread_id, nullptr);
if (rc < 0) {
perror("pthread_join");
return 6;
}
rc = pthread_attr_destroy(&attributes);
if (rc != 0) {
outln("pthread_attr_destroy: {}", strerror(rc));
return 7;
}
return 0;
}
int kill_test()
{
pthread_t thread_id;
int rc = pthread_create(
&thread_id, nullptr, [](void*) -> void* {
outln("I'm the secondary thread :^)");
sleep(100);
outln("Secondary thread is still alive :^(");
pthread_exit((void*)0xDEADBEEF);
},
nullptr);
if (rc < 0) {
perror("pthread_create");
return 1;
}
int result = 0;
sleep(1);
outln("I'm the main thread :^)");
if (pthread_kill(thread_id, 0) != 0) {
perror("pthread_kill");
result = 1;
}
if (pthread_kill(thread_id, SIGKILL) != 0) {
perror("pthread_kill(SIGKILL)");
result = 1;
}
outln("Main thread exiting");
return result;
}