Re: RFA: fix crash in expression evaluation

[Tom Tromey <tromey at redhat dot com>]

>>>>> "Tom" == Tom Tromey <tromey@redhat.com> writes:

Tom> I'll send it through the tester.

It passed.

Here is the new patch.

Tom

2008-10-02  Tom Tromey  <tromey@redhat.com>

	* value.c (coerce_array): Use check_typedef.

diff --git a/gdb/testsuite/gdb.base/pointers.c b/gdb/testsuite/gdb.base/pointers.c
index 85bfdc9..4ee5e78 100644
--- a/gdb/testsuite/gdb.base/pointers.c
+++ b/gdb/testsuite/gdb.base/pointers.c
@@ -71,6 +71,15 @@ float ** ptr_to_ptr_to_float;
 
 int y;
 
+
+typedef long k[5];
+
+typedef struct {
+  k array_variable;
+} S;
+
+S instance;
+
 /* Do nothing function used for forcing some of the above variables to
    be referenced by the program source.  If the variables are not
    referenced, some linkers will remove the symbol from the symbol
diff --git a/gdb/testsuite/gdb.base/pointers.exp b/gdb/testsuite/gdb.base/pointers.exp
index 5532140..d7d17e7 100644
--- a/gdb/testsuite/gdb.base/pointers.exp
+++ b/gdb/testsuite/gdb.base/pointers.exp
@@ -596,3 +596,7 @@ gdb_expect {
     timeout             { fail "(timeout) ptype ppppppC" }
 }
 
+# Regression test for a crash.
+
+gdb_test "p instance.array_variable + 0" \
+  " = \\(long int \\*\\) 0x\[0-9a-f\]*"
diff --git a/gdb/value.c b/gdb/value.c
index 1fa376d..695aa33 100644
--- a/gdb/value.c
+++ b/gdb/value.c
@@ -1728,12 +1728,21 @@ coerce_ref (struct value *arg)
 struct value *
 coerce_array (struct value *arg)
 {
+  struct type *type;
+
   arg = coerce_ref (arg);
-  if (current_language->c_style_arrays
-      && TYPE_CODE (value_type (arg)) == TYPE_CODE_ARRAY)
-    arg = value_coerce_array (arg);
-  if (TYPE_CODE (value_type (arg)) == TYPE_CODE_FUNC)
-    arg = value_coerce_function (arg);
+  type = check_typedef (value_type (arg));
+
+  switch (TYPE_CODE (type))
+    {
+    case TYPE_CODE_ARRAY:
+      if (current_language->c_style_arrays)
+	arg = value_coerce_array (arg);
+      break;
+    case TYPE_CODE_FUNC:
+      arg = value_coerce_function (arg);
+      break;
+    }
   return arg;
 }