This change will ensure that all non-optimized code will be compiled
with debug break slots when debugging is initiated. This is handled by
scanning the heap for non-optimized functions without debug break slots and setting their code to be lazy recomplied. When the lazy recompilation happens the code will ge generated with debug break slots (if debugging is still active at that point in time).
R=svenpanne@chromium.org
Currently this is only implemented for functions which do not have activations on the stack.
BUG=
TEST=
Review URL: http://codereview.chromium.org//7839030
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9250 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Use the BitField helper class for the code flags, so that we do not have to
define both a shift and a mask explicitly. This makes changing the flags
layout simpler.
Also, make the 'mask' and 'max' members of BitField into constants, because
they are constant and so that they can be used as constant expressions.
E.g., so they can be used in declaring other const members or in static
asserts.
R=fschneider@chromium.org
BUG=
TEST=
Review URL: http://codereview.chromium.org/7787028
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9232 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
When recompiling code (e.g., when optimizing) we could incorrectly hoist
some function expressions. This leads to incorrect results or a crash. The
root cause was that functions were not correctly categorized as expression
or declaration at parse time.
This requires some extra hoops to prevent the print name "anonymous" for
functions created by 'new Function' from establishing a binding.
R=vegorov@chromium.org,kasperl@chromium.org
BUG=1583
TEST=regress-1583
Review URL: http://codereview.chromium.org/7572019
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8838 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Advantage is that it's much easier to add new element types (like FAST_SMI_ELEMENTS), and that handling logic for each element kind is (more) consolidated.
Currently, only GetElementsWithReceiver uses the new encapsulation, but the goal is to move much more element functionality into the class incrementally.
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/7527001
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8810 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The IC records the set of types it has seen, e.g. {String} or {Boolean,
Undefined}, etc. Note that in theory this could lead to a large number of
different ToBoolean ICs (512, to be exact, because we distinguish 9 types),
but in practice only a small handful of them are actually generated.
Currently the type recording part is only implemented on ia32, other platforms
continue to work like they did before, though.
Removed some dead code on the way.
Review URL: http://codereview.chromium.org/7473028
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8716 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
We did not properly combine the property names from the parameter map
and the arguments backing store. They could overwrite each other and
be unsorted.
Also fix an unrelated bug: deleting from a dictionary-mode arguments
backing store could corrupt the parameter map.
R=rossberg@chromium.org
BUG=1531
TEST=mjsunit/regress/regress-1531.js
Review URL: http://codereview.chromium.org/7278033
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8571 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Due to issues relating mostly to chrome extensions we have lately been
running into OOMs that are caused by our executable space running
out. This change introduces flushing of code from regexps if we have
not used the code for 5 mark sweeps.
The approach is different from the normal function code flusing. Here
we make a copy of the code inside the data array, and exchange the
original code with a smi determined by the sweep_generation (a new
heap variable increased everytime we do mark sweep/compact). If we
encounter a smi in EnsureCompiled we simply reinstate the code
object. If, in the marking phase of mark sweep, we find a regexp that
already have a smi in the code field, and this is more than 5
generations old we flush the code from the saved index.
Review URL: http://codereview.chromium.org/7282026
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8532 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Lots of web pages have really frequently firing timers that keep the
profiler thread spinning if we require a period of JS inactivity
before suspending the profiler. While it's possible to throttle it by
increasing the sleep delay and adjusting the duration of the required
inactive period, it seemed much simpler to just stop it immediately on
exiting JS.
Stopping the profiler this way effectively turned off two optimization
heuristics: 1) eager optimization (it's reset on waking up the
profiler and now the profiler wakes up much more frequently) and 2)
optimization throttling based on JS to non-JS state ratio (the ratio
is now 100%). I removed these two heuristics and found no performance
regressions so far.
R=ager@chromium.org
BUG=crbug.com/77625
TEST=none
Review URL: http://codereview.chromium.org/7274024
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8472 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
