Change executable pages to be read/execute but not writable by default.
All pages are made temporarily writable just before a full GC, because both
the mark and sweep phases write to the pages. When allocating in a page and
when patching code, the pages are made temporarily writable.
The order of allocation of Code and Instructions objects is changed so that
a GC will not occur after Instructions is allocated. (A full GC would
render the Instructions unwritable.) A scoped object is used to make memory
protection simpler.
Original CL: https://codereview.chromium.org/106593002/
I added a cc test that is expected to crash.
R=srdjan@google.com
Review URL: https://codereview.chromium.org//136563002
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@32493 260f80e4-7a28-3924-810f-c04153c831b5
Instead of passing a size in bytes to the allocation function, we now
have a templatized Alloc function:
zone->Alloc<Type>(len)
This is better for security, as we can check for integer overflow in
the size computation before performing the allocation. Before, we
often failed to check this.
Review URL: https://chromiumcodereview.appspot.com//10836061
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@10254 260f80e4-7a28-3924-810f-c04153c831b5
The purpose of this change is twofold:
1. Source in the bin directory can now use the same assertions as
source in the vm directory. The ASSERT macro used by the code
in runtime/bin was just defined to use assert from the standard
C library.
2. Moving other implementation parts from runtime/vm to
runtime/platform (e.g. classes Monitor and Mutex) for sharing
between runtime/bin and runtime/vm will be easier as these
implementations rely on these assertion macros.
Created two gypi files for the platform directory. One for the
headers and one for the source. The source one is only included
when building the VM library and will be present in libdart.a
when the dart executable is linked.
All the code for asserts is still in the dart namespace.
Also re-arranged the order of includes to be alphabetically in
the files touched.
R=ager@google.com, iposva@google.com
BUG=
TEST=
Review URL: http://codereview.chromium.org//9189003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@3335 260f80e4-7a28-3924-810f-c04153c831b5
zra@google.com