This reduces chances of improper usage, see http://code.google.com/p/v8/issues/detail?id=586
for more details.

BUG=586

Review URL: http://codereview.chromium.org/555072

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Review URL: http://codereview.chromium.org/162001


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Review URL: http://codereview.chromium.org/160453


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Review URL: http://codereview.chromium.org/151148

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This issue was raised by Brett Wilson while reviewing my changelist for readability. Craig Silverstein (one of C++ SG maintainers) confirmed that we should declare one namespace per line. Our way of namespaces closing seems not violating style guides (there is no clear agreement on it), so I left it intact.

Review URL: http://codereview.chromium.org/115756


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This allows test-heap to run successfully.

Review URL: http://codereview.chromium.org/115706


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Made a few more places use intptr_t instead of int for pointer arithmetic.
Ensure that objects have a declared size that matches heap object alignment.

Review URL: http://codereview.chromium.org/115559


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When a paged space shrinks by an even multiple of the chunk size,
ensure that the cached last page in the space is updated.

Review URL: http://codereview.chromium.org/113267

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to the page iterator leads to occasional crashes in tests.
Review URL: http://codereview.chromium.org/113262

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at construction time.  If allocation during iteration causes a paged
space to expand, the iterator will not return the new pages.

This makes it more closely match the HeapObjectIterator behavior, and
it removes a possible source of bugs (if the allocation top was in the
last page in the space, the old iterator would stop only when it
reached the end of the space, potentially returning invalid pages from
a freshly expanded space).

Review URL: http://codereview.chromium.org/115074

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and unprotecting it when (re)entering.  The functionality is enabled
by the flag --protect-heap and requires V8 to be built with
ENABLE_HEAP_PROTECTION and ENABLE_LOGGING_AND_PROFILING defined.

Implemented on Linux and Windows but not yet for other platforms.

Review URL: http://codereview.chromium.org/53004

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- Refactored block copying.

Review URL: http://codereview.chromium.org/7863

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  part of NewSpace and made NewSpace statically allocated.
- Eliminated indirection in MigrateObject.

Review URL: http://codereview.chromium.org/7619

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Added presubmit step to check copyright.



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* Make old_data_space non-executable on OSs and hardware that support it.
* Rename old_space to old_pointer_space (can contain pointers, esp. to new space).
* Ensure that individual pages allocated for old_space are only executable when
they are for code objects.
* Ensure Space::Setup can cope with non-aligned memory.
* Make some methods on Spaces virtual.  Make a way to iterate over all spaces.
* Replace executability flag with Executability enum in order to make intent at
call site clearer.
* Fix serialization/deserialization to allocate write barrier memory for large
arrays.



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Added a few samples and support for building them. The samples include a simple shell that can be used to benchmark and test V8.

Changed V8::GetVersion to return the version as a string.

Added source for lazily loaded scripts to snapshots and made serialization non-destructive.

Improved ARM support by fixing the write barrier code to use aligned loads and stores and by removing premature locals optimization that relied on broken support for callee-saved registers (removed).

Refactored the code for marking live objects during garbage collection and the code for allocating objects in paged spaces. Introduced an abstraction for the map word of a heap-allocated object and changed the memory allocator to allocate executable memory only for spaces that may contain code objects.

Moved StringBuilder to utils.h and ScopedLock to platform.h, where they can be used by debugging and logging modules. Added thread-safe message queues for dealing with debugger events.

Fixed the source code reported by toString for certain builtin empty functions and made sure that the prototype property of a function is enumerable.

Improved performance of converting values to condition flags in generated code.

Merged disassembler-{arch} files.


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