From 26dc784103914b9d6ba36e0a96fa4b3af977626f Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Thu, 4 Aug 2022 21:43:38 +0200
Subject: user/tests: split the tests by parts of codebase
---
src/user/app/tests/kernel/fs.c | 34 ++++
src/user/app/tests/kernel/misc.c | 65 ++++++++
src/user/app/tests/kernel/miscsyscall.c | 264 ++++++++++++++++++++++++++++++++
3 files changed, 363 insertions(+)
create mode 100644 src/user/app/tests/kernel/fs.c
create mode 100644 src/user/app/tests/kernel/misc.c
create mode 100644 src/user/app/tests/kernel/miscsyscall.c
(limited to 'src/user/app/tests/kernel')
diff --git a/src/user/app/tests/kernel/fs.c b/src/user/app/tests/kernel/fs.c
new file mode 100644
index 0000000..c8d2eae
--- /dev/null
+++ b/src/user/app/tests/kernel/fs.c
@@ -0,0 +1,34 @@
+#include "../tests.h"
+#include <camellia/syscalls.h>
+
+static void test_unfinished_req(void) {
+ handle_t h;
+ if (_syscall_fork(FORK_NEWFS, &h)) {
+ // TODO make a similar test with all 0s passed to fs_wait
+ struct fs_wait_response res;
+ _syscall_fs_wait(NULL, 0, &res);
+ // TODO second fs_wait
+ exit(0);
+ } else {
+ _syscall_mount(h, "/", 1);
+ int ret = _syscall_open("/", 1, 0);
+ test(ret < 0);
+ // the handler quits while handling that call - but this syscall should return anyways
+ }
+}
+
+static void test_orphaned_fs(void) {
+ handle_t h;
+ if (_syscall_fork(FORK_NEWFS, &h)) {
+ exit(0);
+ } else {
+ _syscall_mount(h, "/", 1);
+ int ret = _syscall_open("/", 1, 0);
+ test(ret < 0);
+ }
+}
+
+void r_k_fs(void) {
+ run_test(test_unfinished_req);
+ run_test(test_orphaned_fs);
+}
diff --git a/src/user/app/tests/kernel/misc.c b/src/user/app/tests/kernel/misc.c
new file mode 100644
index 0000000..6899e18
--- /dev/null
+++ b/src/user/app/tests/kernel/misc.c
@@ -0,0 +1,65 @@
+#include "../tests.h"
+#include <camellia/errno.h>
+#include <camellia/syscalls.h>
+#include <string.h>
+
+static void test_fault_kill(void) {
+ if (!fork()) { /* invalid memory access */
+ asm volatile("movb $69, 0" ::: "memory");
+ // TODO test_fail which works in children
+ printf("this shouldn't happen");
+ exit(-1);
+ }
+ if (!fork()) { /* #GP */
+ asm volatile("hlt" ::: "memory");
+ printf("this shouldn't happen");
+ exit(-1);
+ }
+
+ int await_cnt = 0;
+ while (_syscall_await() != ~0) await_cnt++;
+ test(await_cnt == 2);
+}
+
+static void test_efault(void) {
+ const char *str = "o, 16 characters";
+ char str2[16];
+ char *invalid = (void*)0x1000;
+ handle_t h;
+
+ memcpy(str2, str, 16);
+
+ test((h = _syscall_open(TMPFILEPATH, strlen(TMPFILEPATH), OPEN_CREATE)));
+ test(_syscall_write(h, str, 16, 0, 0) == 16);
+ test(_syscall_write(h, str2, 16, 0, 0) == 16);
+
+ test(_syscall_write(h, invalid, 16, 0, 0) == -EFAULT);
+
+ /* x64 non-canonical pointers */
+ test(_syscall_write(h, (void*)((uintptr_t)str ^ 0x8000000000000000), 16, 0, 0) == -EFAULT);
+ test(_syscall_write(h, (void*)((uintptr_t)str ^ 0x1000000000000000), 16, 0, 0) == -EFAULT);
+ test(_syscall_write(h, (void*)((uintptr_t)str ^ 0x0100000000000000), 16, 0, 0) == -EFAULT);
+ test(_syscall_write(h, (void*)((uintptr_t)str ^ 0x0010000000000000), 16, 0, 0) == -EFAULT);
+ test(_syscall_write(h, (void*)((uintptr_t)str ^ 0x0001000000000000), 16, 0, 0) == -EFAULT);
+ test(_syscall_write(h, (void*)((uintptr_t)str ^ 0x0000800000000000), 16, 0, 0) == -EFAULT);
+
+ test(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x8000000000000000), 16, 0, 0) == -EFAULT);
+ test(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x1000000000000000), 16, 0, 0) == -EFAULT);
+ test(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x0100000000000000), 16, 0, 0) == -EFAULT);
+ test(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x0010000000000000), 16, 0, 0) == -EFAULT);
+ test(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x0001000000000000), 16, 0, 0) == -EFAULT);
+ test(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x0000800000000000), 16, 0, 0) == -EFAULT);
+
+ test(_syscall_write(h, str, 16, 0, 0) == 16);
+ close(h);
+}
+
+static void test_invalid_syscall(void) {
+ test(_syscall(~0, 0, 0, 0, 0, 0) < 0);
+}
+
+void r_k_misc(void) {
+ run_test(test_fault_kill);
+ run_test(test_efault);
+ run_test(test_invalid_syscall);
+}
diff --git a/src/user/app/tests/kernel/miscsyscall.c b/src/user/app/tests/kernel/miscsyscall.c
new file mode 100644
index 0000000..22b6b33
--- /dev/null
+++ b/src/user/app/tests/kernel/miscsyscall.c
@@ -0,0 +1,264 @@
+#include "../tests.h"
+#include <camellia/errno.h>
+#include <camellia/execbuf.h>
+#include <camellia/flags.h>
+#include <camellia/syscalls.h>
+#include <string.h>
+#include <unistd.h>
+
+
+static void test_await(void) {
+ /* creates 16 child processes, each returning a different value. then checks
+ * if await() returns every value exactly once */
+ int ret;
+ int counts[16] = {0};
+
+ for (int i = 0; i < 16; i++)
+ if (!fork())
+ exit(i);
+
+ while ((ret = _syscall_await()) != ~0) {
+ test(0 <= ret && ret < 16);
+ counts[ret]++;
+ }
+
+ for (int i = 0; i < 16; i++)
+ test(counts[i] == 1);
+}
+
+static void test_pipe(void) {
+ const char *pipe_msgs[2] = {"hello", "world"};
+ handle_t ends[2];
+ char buf[16];
+
+ /* test regular reads / writes */
+ test(_syscall_pipe(ends, 0) >= 0);
+ if (!fork()) {
+ /* those repeated asserts ensure that you can't read/write to the wrong ends */
+ test(_syscall_read(ends[1], buf, 16, 0) < 0);
+ test(_syscall_write(ends[0], buf, 16, 0, 0) < 0);
+
+ test(5 == _syscall_write(ends[1], pipe_msgs[0], 5, -1, 0));
+
+ test(_syscall_read(ends[1], buf, 16, 0) < 0);
+ test(_syscall_write(ends[0], buf, 16, 0, 0) < 0);
+
+ test(5 == _syscall_write(ends[1], pipe_msgs[1], 5, -1, 0));
+
+ exit(0);
+ } else {
+ test(_syscall_read(ends[1], buf, 16, 0) < 0);
+ test(_syscall_write(ends[0], buf, 16, 0, 0) < 0);
+
+ test(5 == _syscall_read(ends[0], buf, 16, 0));
+ test(!memcmp(buf, pipe_msgs[0], 5));
+
+ test(_syscall_read(ends[1], buf, 16, 0) < 0);
+ test(_syscall_write(ends[0], buf, 16, 0, 0) < 0);
+
+ test(5 == _syscall_read(ends[0], buf, 16, 0));
+ test(!memcmp(buf, pipe_msgs[1], 5));
+
+ _syscall_await();
+ }
+ close(ends[0]);
+ close(ends[1]);
+
+
+ /* writing to pipes with one end closed */
+ test(_syscall_pipe(ends, 0) >= 0);
+ for (int i = 0; i < 16; i++) {
+ if (!fork()) {
+ close(ends[1]);
+ test(_syscall_read(ends[0], buf, 16, 0) < 0);
+ exit(0);
+ }
+ }
+ close(ends[1]);
+ for (int i = 0; i < 16; i++)
+ _syscall_await();
+ close(ends[0]);
+
+ test(_syscall_pipe(ends, 0) >= 0);
+ for (int i = 0; i < 16; i++) {
+ if (!fork()) {
+ close(ends[0]);
+ test(_syscall_write(ends[1], buf, 16, 0, 0) < 0);
+ exit(0);
+ }
+ }
+ close(ends[0]);
+ for (int i = 0; i < 16; i++)
+ _syscall_await();
+ close(ends[1]);
+
+
+ /* queueing */
+ test(_syscall_pipe(ends, 0) >= 0);
+ for (int i = 0; i < 16; i++) {
+ if (!fork()) {
+ test(_syscall_write(ends[1], pipe_msgs[0], 5, -1, 0) == 5);
+ exit(0);
+ }
+ }
+ close(ends[1]);
+ for (int i = 0; i < 16; i++) {
+ test(_syscall_read(ends[0], buf, sizeof buf, 0) == 5);
+ _syscall_await();
+ }
+ test(_syscall_read(ends[0], buf, sizeof buf, 0) < 0);
+ close(ends[0]);
+
+ test(_syscall_pipe(ends, 0) >= 0);
+ for (int i = 0; i < 16; i++) {
+ if (!fork()) {
+ memset(buf, 0, sizeof buf);
+ test(_syscall_read(ends[0], buf, 5, -1) == 5);
+ test(!memcmp(buf, pipe_msgs[1], 5));
+ exit(0);
+ }
+ }
+ close(ends[0]);
+ for (int i = 0; i < 16; i++) {
+ test(_syscall_write(ends[1], pipe_msgs[1], 5, -1, 0) == 5);
+ _syscall_await();
+ }
+ test(_syscall_write(ends[1], pipe_msgs[1], 5, -1, 0) < 0);
+ close(ends[1]);
+
+
+ // not a to.do detect when all processes that can read are stuck on writing to the pipe and vice versa
+ // it seems like linux just lets the process hang endlessly.
+}
+
+static void test_memflag(void) {
+ void *page = (void*)0x77777000;
+ _syscall_memflag(page, 4096, MEMFLAG_PRESENT); // allocate page
+ memset(page, 77, 4096); // write to it
+ _syscall_memflag(page, 4096, 0); // free it
+
+ if (!fork()) {
+ memset(page, 11, 4096); // should segfault
+ exit(0);
+ } else {
+ test(_syscall_await() != 0); // test if the process crashed
+ }
+
+ char *pages[4];
+ for (size_t i = 0; i < 4; i++) {
+ pages[i] = _syscall_memflag(NULL, 4096, MEMFLAG_FINDFREE);
+ test(pages[i] == _syscall_memflag(NULL, 4096, MEMFLAG_FINDFREE | MEMFLAG_PRESENT));
+ if (i > 0) test(pages[i] != pages[i-1]);
+ *pages[i] = 0x77;
+ }
+
+ for (size_t i = 0; i < 4; i++)
+ _syscall_memflag(pages, 4096, MEMFLAG_PRESENT);
+}
+
+static void test_dup(void) {
+ handle_t pipe[2];
+ handle_t h1, h2;
+ test(_syscall_pipe(pipe, 0) >= 0);
+
+ if (!fork()) {
+ close(pipe[0]);
+
+ h1 = _syscall_dup(pipe[1], -1, 0);
+ test(h1 >= 0);
+ test(h1 != pipe[1]);
+ h2 = _syscall_dup(h1, -1, 0);
+ test(h2 >= 0);
+ test(h2 != pipe[1] && h2 != h1);
+
+ _syscall_write(pipe[1], "og", 2, 0, 0);
+ _syscall_write(h1, "h1", 2, 0, 0);
+ _syscall_write(h2, "h2", 2, 0, 0);
+
+ close(pipe[1]);
+ _syscall_write(h1, "h1", 2, 0, 0);
+ _syscall_write(h2, "h2", 2, 0, 0);
+
+ test(_syscall_dup(h1, pipe[1], 0) == pipe[1]);
+ test(_syscall_dup(h2, pipe[1], 0) == pipe[1]);
+ test(_syscall_dup(h1, pipe[1], 0) == pipe[1]);
+ test(_syscall_dup(h2, pipe[1], 0) == pipe[1]);
+ close(h1);
+ close(h2);
+
+ test(_syscall_dup(pipe[1], h2, 0) == h2);
+ _syscall_write(h2, "h2", 2, 0, 0);
+ close(h2);
+
+ test(_syscall_dup(pipe[1], h1, 0) == h1);
+ _syscall_write(h1, "h1", 2, 0, 0);
+ close(h1);
+
+ exit(0);
+ } else {
+ char buf[16];
+ size_t count = 0;
+ close(pipe[1]);
+ while (_syscall_read(pipe[0], buf, sizeof buf, 0) >= 0)
+ count++;
+ test(count == 7);
+ _syscall_await();
+ }
+
+
+ close(pipe[0]);
+}
+
+static void test_execbuf(void) {
+ // not really a test, TODO
+ // also TODO check returning last syscall value
+ const char str1[] = "test_execbuf: string 1\n";
+ const char str2[] = "test_execbuf: and 2\n";
+ uint64_t buf[] = {
+ EXECBUF_SYSCALL, _SYSCALL_WRITE, 1, (uintptr_t)str1, sizeof(str1) - 1, -1, 0,
+ EXECBUF_SYSCALL, _SYSCALL_WRITE, 1, (uintptr_t)str2, sizeof(str2) - 1, -1, 0,
+ EXECBUF_SYSCALL, _SYSCALL_EXIT, 0, 0, 0, 0, 0,
+ };
+ _syscall_execbuf(buf, sizeof buf);
+ test_fail();
+}
+
+static void test_sleep(void) {
+ // TODO yet another of those fake tests that you have to verify by hand
+ if (!fork()) {
+ if (!fork()) {
+ _syscall_sleep(100);
+ printf("1\n");
+ _syscall_sleep(200);
+ printf("3\n");
+ _syscall_sleep(200);
+ printf("5\n");
+ _syscall_exit(0);
+ }
+ if (!fork()) {
+ printf("0\n");
+ _syscall_sleep(200);
+ printf("2\n");
+ _syscall_sleep(200);
+ printf("4\n");
+ /* get killed while asleep
+ * a peaceful death, i suppose. */
+ for (;;) _syscall_sleep(1000000000);
+ }
+ _syscall_await();
+ _syscall_exit(0);
+ }
+
+ /* this part checks if, after killing an asleep process, other processes can still wake up */
+ _syscall_sleep(600);
+ printf("6\n");
+}
+
+void r_k_miscsyscall(void) {
+ run_test(test_await);
+ run_test(test_pipe);
+ run_test(test_memflag);
+ run_test(test_dup);
+ run_test(test_execbuf);
+ run_test(test_sleep);
+}
--
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