4 files changed, 33 insertions, 17 deletions

diff --git a/ChangeLog b/ChangeLog
index 55ef99c3cc..d8a4f53e89 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Thu Feb 28 13:51:59 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* eval.c (stack_check): made flag per threads.
+
+	* thread.c (rb_thread_set_raised, rb_thread_reset_raised): prefixed.
+
 Thu Feb 28 11:43:56 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* file.c (rb_file_flock): immediately returns on EAGAIN if
diff --git a/eval.c b/eval.c
index db760116df..cd65803273 100644
--- a/eval.c
+++ b/eval.c
@@ -656,7 +656,7 @@ rb_longjmp(int tag, VALUE mesg)
     const char *file;
     int line = 0;
 
-    if (thread_set_raised(th)) {
+    if (rb_thread_set_raised(th)) {
 	th->errinfo = exception_error;
 	JUMP_TAG(TAG_FATAL);
     }
@@ -703,7 +703,7 @@ rb_longjmp(int tag, VALUE mesg)
 	    th->errinfo = mesg;
 	}
 	else if (status) {
-	    thread_reset_raised(th);
+	    rb_thread_reset_raised(th);
 	    JUMP_TAG(status);
 	}
     }
@@ -715,7 +715,7 @@ rb_longjmp(int tag, VALUE mesg)
 			0 /* TODO: id */, 0 /* TODO: klass */);
     }
 
-    thread_reset_raised(th);
+    rb_thread_reset_raised(th);
     JUMP_TAG(tag);
 }
 
@@ -1241,17 +1241,17 @@ rb_with_disable_interrupt(VALUE (*proc)(ANYARGS), VALUE data)
 static inline void
 stack_check(void)
 {
-    static int overflowing = 0;
+    rb_thread_t *th = GET_THREAD();
 
-    if (!overflowing && ruby_stack_check()) {
+    if (!rb_thread_stack_overflowing_p(th) && ruby_stack_check()) {
 	int state;
-	overflowing = 1;
+	rb_thread_set_stack_overflow(th);
 	PUSH_TAG();
 	if ((state = EXEC_TAG()) == 0) {
 	    rb_exc_raise(sysstack_error);
 	}
 	POP_TAG();
-	overflowing = 0;
+	rb_thread_reset_stack_overflow(th);
 	JUMP_TAG(state);
     }
 }
@@ -1427,6 +1427,8 @@ rb_call0(VALUE klass, VALUE recv, ID mid, int argc, const VALUE *argv, int scope
 	}
     }
 
+    stack_check();
+
     {
 	VALUE val;
 	/*
diff --git a/eval_intern.h b/eval_intern.h
index a7b57e86d2..b5133f0460 100644
--- a/eval_intern.h
+++ b/eval_intern.h
@@ -195,8 +195,16 @@ while (0)
 void rb_thread_cleanup(void);
 void rb_thread_wait_other_threads(void);
 
-int thread_set_raised(rb_thread_t *th);
-int thread_reset_raised(rb_thread_t *th);
+#define RAISED_EXCEPTION     1
+#define RAISED_STACKOVERFLOW 2
+int rb_thread_set_raised(rb_thread_t *th);
+int rb_thread_reset_raised(rb_thread_t *th);
+#define rb_thread_set_stack_overflow(th) \
+    ((th)->raised_flag |= RAISED_STACKOVERFLOW)
+#define rb_thread_reset_stack_overflow(th) \
+    ((th)->raised_flag &= ~RAISED_STACKOVERFLOW)
+#define rb_thread_stack_overflowing_p(th) \
+    (((th)->raised_flag & RAISED_STACKOVERFLOW) != 0)
 
 VALUE rb_f_eval(int argc, VALUE *argv, VALUE self);
 VALUE rb_make_exception(int argc, VALUE *argv);
diff --git a/thread.c b/thread.c
index c5bf767bcb..d199a39645 100644
--- a/thread.c
+++ b/thread.c
@@ -845,22 +845,22 @@ rb_thread_signal_exit(void *thptr)
 }
 
 int
-thread_set_raised(rb_thread_t *th)
+rb_thread_set_raised(rb_thread_t *th)
 {
-    if (th->raised_flag) {
+    if (th->raised_flag & RAISED_EXCEPTION) {
 	return 1;
     }
-    th->raised_flag = 1;
+    th->raised_flag |= RAISED_EXCEPTION;
     return 0;
 }
 
 int
-thread_reset_raised(rb_thread_t *th)
+rb_thread_reset_raised(rb_thread_t *th)
 {
-    if (th->raised_flag == 0) {
+    if (!(th->raised_flag & RAISED_EXCEPTION)) {
 	return 0;
     }
-    th->raised_flag = 0;
+    th->raised_flag &= ~RAISED_EXCEPTION;
     return 1;
 }
 
@@ -3005,7 +3005,7 @@ ruby_suppress_tracing(VALUE (*func)(VALUE, int), VALUE arg, int always)
 	th->tracing = 1;
     }
 
-    raised = thread_reset_raised(th);
+    raised = rb_thread_reset_raised(th);
 
     PUSH_TAG();
     if ((state = EXEC_TAG()) == 0) {
@@ -3013,7 +3013,7 @@ ruby_suppress_tracing(VALUE (*func)(VALUE, int), VALUE arg, int always)
     }
 
     if (raised) {
-	thread_set_raised(th);
+	rb_thread_set_raised(th);
     }
     POP_TAG();