better signal/exception support

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@42 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 74 insertions, 1 deletions

diff --git a/tests/testsig.c b/tests/testsig.c
index 59af54fc8e..d93f42806a 100644
--- a/tests/testsig.c
+++ b/tests/testsig.c
@@ -1,7 +1,13 @@
+#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <signal.h>
 #include <unistd.h>
+#include <setjmp.h>
+#include <sys/ucontext.h>
+
+jmp_buf jmp_env;
 
 void alarm_handler(int sig)
 {
@@ -9,15 +15,82 @@ void alarm_handler(int sig)
     alarm(1);
 }
 
+void dump_regs(struct ucontext *uc)
+{
+    printf("EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n"
+           "ESI=%08x EDI=%08x EBP=%08x ESP=%08x\n"
+           "EFL=%08x EIP=%08x\n",
+           uc->uc_mcontext.gregs[EAX],
+           uc->uc_mcontext.gregs[EBX],
+           uc->uc_mcontext.gregs[ECX],
+           uc->uc_mcontext.gregs[EDX],
+           uc->uc_mcontext.gregs[ESI],
+           uc->uc_mcontext.gregs[EDI],
+           uc->uc_mcontext.gregs[EBP],
+           uc->uc_mcontext.gregs[ESP],
+           uc->uc_mcontext.gregs[EFL],
+           uc->uc_mcontext.gregs[EIP]);
+}
+
+void sig_handler(int sig, siginfo_t *info, void *puc)
+{
+    struct ucontext *uc = puc;
+
+    printf("%s: si_signo=%d si_errno=%d si_code=%d si_addr=0x%08lx\n",
+           strsignal(info->si_signo),
+           info->si_signo, info->si_errno, info->si_code, 
+           (unsigned long)info->si_addr);
+    dump_regs(uc);
+    longjmp(jmp_env, 1);
+}
+
+int v1;
+
 int main(int argc, char **argv)
 {
     struct sigaction act;
+    int i;
+    
+    /* test division by zero reporting */
+    if (setjmp(jmp_env) == 0) {
+        act.sa_sigaction = sig_handler;
+        sigemptyset(&act.sa_mask);
+        act.sa_flags = SA_SIGINFO | SA_ONESHOT;
+        sigaction(SIGFPE, &act, NULL);
+        
+        /* now divide by zero */
+        v1 = 0;
+        v1 = 2 / v1;
+    }
+
+    /* test illegal instruction reporting */
+    if (setjmp(jmp_env) == 0) {
+        act.sa_sigaction = sig_handler;
+        sigemptyset(&act.sa_mask);
+        act.sa_flags = SA_SIGINFO | SA_ONESHOT;
+        sigaction(SIGILL, &act, NULL);
+        
+        /* now execute an invalid instruction */
+        asm volatile("ud2");
+    }
+    
+    /* test SEGV reporting */
+    if (setjmp(jmp_env) == 0) {
+        act.sa_sigaction = sig_handler;
+        sigemptyset(&act.sa_mask);
+        act.sa_flags = SA_SIGINFO | SA_ONESHOT;
+        sigaction(SIGSEGV, &act, NULL);
+        
+        /* now store in an invalid address */
+        *(char *)0x1234 = 1;
+    }
+    
     act.sa_handler = alarm_handler;
     sigemptyset(&act.sa_mask);
     act.sa_flags = 0;
     sigaction(SIGALRM, &act, NULL);
     alarm(1);
-    for(;;) {
+    for(i = 0;i < 2; i++) {
         sleep(1);
     }
     return 0;