The length_ field must be defined as intptr_t rather than int. This is
due to the fact that we place native argc/argv values into stack slots
(via SetFrameSlot) and then interpret the slots as a an instance of
Arguments class.
Little endian architectures get 'lucky' that the layout happens to work
with implicit padding. Big endian is not as lucky.
See Runtime_ArrayConstructor for an example.
Based on
https://github.com/andrewlow/v8/commit/
d8c3570f71c0be9914e79139740124bd1ca711a7
BUG=v8:3366
LOG=N
R=danno@chromium.org
Review URL: https://codereview.chromium.org/
314123003
Patch from Andrew Low <andrew_low@ca.ibm.com>.
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21711
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
// Object* Runtime_function(Arguments args) {
// ... use args[i] here ...
// }
+//
+// Note that length_ (whose value is in the integer range) is defined
+// as intptr_t to provide endian-neutrality on 64-bit archs.
class Arguments BASE_EMBEDDED {
public:
}
// Get the total number of arguments including the receiver.
- int length() const { return length_; }
+ int length() const { return static_cast<int>(length_); }
Object** arguments() { return arguments_; }
private:
- int length_;
+ intptr_t length_;
Object** arguments_;
};