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-rw-r--r--user/alarmtest.c193
-rw-r--r--user/bttest.c10
-rw-r--r--user/call.c17
3 files changed, 220 insertions, 0 deletions
diff --git a/user/alarmtest.c b/user/alarmtest.c
new file mode 100644
index 0000000..b8d85f7
--- /dev/null
+++ b/user/alarmtest.c
@@ -0,0 +1,193 @@
+//
+// test program for the alarm lab.
+// you can modify this file for testing,
+// but please make sure your kernel
+// modifications pass the original
+// versions of these tests.
+//
+
+#include "kernel/param.h"
+#include "kernel/types.h"
+#include "kernel/stat.h"
+#include "kernel/riscv.h"
+#include "user/user.h"
+
+void test0();
+void test1();
+void test2();
+void test3();
+void periodic();
+void slow_handler();
+void dummy_handler();
+
+int
+main(int argc, char *argv[])
+{
+ test0();
+ test1();
+ test2();
+ test3();
+ exit(0);
+}
+
+volatile static int count;
+
+void
+periodic()
+{
+ count = count + 1;
+ printf("alarm!\n");
+ sigreturn();
+}
+
+// tests whether the kernel calls
+// the alarm handler even a single time.
+void
+test0()
+{
+ int i;
+ printf("test0 start\n");
+ count = 0;
+ sigalarm(2, periodic);
+ for(i = 0; i < 1000*500000; i++){
+ if((i % 1000000) == 0)
+ write(2, ".", 1);
+ if(count > 0)
+ break;
+ }
+ sigalarm(0, 0);
+ if(count > 0){
+ printf("test0 passed\n");
+ } else {
+ printf("\ntest0 failed: the kernel never called the alarm handler\n");
+ }
+}
+
+void __attribute__ ((noinline)) foo(int i, int *j) {
+ if((i % 2500000) == 0) {
+ write(2, ".", 1);
+ }
+ *j += 1;
+}
+
+//
+// tests that the kernel calls the handler multiple times.
+//
+// tests that, when the handler returns, it returns to
+// the point in the program where the timer interrupt
+// occurred, with all registers holding the same values they
+// held when the interrupt occurred.
+//
+void
+test1()
+{
+ int i;
+ int j;
+
+ printf("test1 start\n");
+ count = 0;
+ j = 0;
+ sigalarm(2, periodic);
+ for(i = 0; i < 500000000; i++){
+ if(count >= 10)
+ break;
+ foo(i, &j);
+ }
+ if(count < 10){
+ printf("\ntest1 failed: too few calls to the handler\n");
+ } else if(i != j){
+ // the loop should have called foo() i times, and foo() should
+ // have incremented j once per call, so j should equal i.
+ // once possible source of errors is that the handler may
+ // return somewhere other than where the timer interrupt
+ // occurred; another is that that registers may not be
+ // restored correctly, causing i or j or the address ofj
+ // to get an incorrect value.
+ printf("\ntest1 failed: foo() executed fewer times than it was called\n");
+ } else {
+ printf("test1 passed\n");
+ }
+}
+
+//
+// tests that kernel does not allow reentrant alarm calls.
+void
+test2()
+{
+ int i;
+ int pid;
+ int status;
+
+ printf("test2 start\n");
+ if ((pid = fork()) < 0) {
+ printf("test2: fork failed\n");
+ }
+ if (pid == 0) {
+ count = 0;
+ sigalarm(2, slow_handler);
+ for(i = 0; i < 1000*500000; i++){
+ if((i % 1000000) == 0)
+ write(2, ".", 1);
+ if(count > 0)
+ break;
+ }
+ if (count == 0) {
+ printf("\ntest2 failed: alarm not called\n");
+ exit(1);
+ }
+ exit(0);
+ }
+ wait(&status);
+ if (status == 0) {
+ printf("test2 passed\n");
+ }
+}
+
+void
+slow_handler()
+{
+ count++;
+ printf("alarm!\n");
+ if (count > 1) {
+ printf("test2 failed: alarm handler called more than once\n");
+ exit(1);
+ }
+ for (int i = 0; i < 1000*500000; i++) {
+ asm volatile("nop"); // avoid compiler optimizing away loop
+ }
+ sigalarm(0, 0);
+ sigreturn();
+}
+
+//
+// dummy alarm handler; after running immediately uninstall
+// itself and finish signal handling
+void
+dummy_handler()
+{
+ sigalarm(0, 0);
+ sigreturn();
+}
+
+//
+// tests that the return from sys_sigreturn() does not
+// modify the a0 register
+void
+test3()
+{
+ uint64 a0;
+
+ sigalarm(1, dummy_handler);
+ printf("test3 start\n");
+
+ asm volatile("lui a5, 0");
+ asm volatile("addi a0, a5, 0xac" : : : "a0");
+ for(int i = 0; i < 500000000; i++)
+ ;
+ asm volatile("mv %0, a0" : "=r" (a0) );
+
+ if(a0 != 0xac)
+ printf("test3 failed: register a0 changed\n");
+ else
+ printf("test3 passed\n");
+}
diff --git a/user/bttest.c b/user/bttest.c
new file mode 100644
index 0000000..05405f9
--- /dev/null
+++ b/user/bttest.c
@@ -0,0 +1,10 @@
+#include "kernel/types.h"
+#include "kernel/stat.h"
+#include "user/user.h"
+
+int
+main(int argc, char *argv[])
+{
+ sleep(1);
+ exit(0);
+}
diff --git a/user/call.c b/user/call.c
new file mode 100644
index 0000000..f725dcb
--- /dev/null
+++ b/user/call.c
@@ -0,0 +1,17 @@
+#include "kernel/param.h"
+#include "kernel/types.h"
+#include "kernel/stat.h"
+#include "user/user.h"
+
+int g(int x) {
+ return x+3;
+}
+
+int f(int x) {
+ return g(x);
+}
+
+void main(void) {
+ printf("%d %d\n", f(8)+1, 13);
+ exit(0);
+}