R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/333013002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21894 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=none
R=dcarney@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/328993003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21819 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

All places that use OS::Allocate either CHECK() that the result is non-NULL,
or use a reasonable fallback if they can't mmap memory.

BUG=none
R=mstarzinger@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/326323002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21810 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

- this avoids using relative include paths which are forbidden by the style guide
- makes the code more readable since it's clear which header is meant
- allows for starting to use checkdeps

BUG=none
R=jkummerow@chromium.org, danno@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/304153016

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21625 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/259183002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@21035 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=none
R=mstarzinger@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/251103003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@21018 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This allocates a timezone cache per isolate.

BUG=
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/197023002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19943 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/146793002

Patch from Cosmin Truta <ctruta@blackberry.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18843 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Some libraries (e.g. Dinkumware) perform strict checks on whether
the symbols defined in classic C library headers (e.g. <stdio.h>),
or in C++-style C library headers (e.g. <cmath>) are used correctly
(respectively, in the global namespace, or in namespace std).

BUG=
R=danno@chromium.org

Review URL: https://codereview.chromium.org/121303005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18578 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This also removes the platform-posix.h header file.

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/23497009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16890 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23703013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16711 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Original descriptions were:
- "Refactor and cleanup VirtualMemory."
- "Fix typo."
- "Deuglify V8_INLINE and V8_NOINLINE."
- "Don't align size on allocation granularity for unaligned ReserveRegion calls."

Reasons for the revert are:
- Our mjsunit test suite slower by a factor of 5(!) in release mode.
- Flaky cctest/test-alloc/CodeRange on all architectures and platforms.
- Tankage of Sunspider by about 6% overall (unverified).

TBR=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/23970004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16662 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23710025

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16646 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Remove a lot of platform duplication, and simplify the virtual
memory implementation. Also improve readability by avoiding bool
parameters for executability (use a dedicated Executability type
instead).

Get rid of the Isolate::UncheckedCurrent() call in the platform
code, as part of the Isolate TLS cleanup.

Use a dedicated random number generator for the address
randomization, instead of messing with the per-isolate random
number generators.

TEST=cctest/test-virtual-memory
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/23641009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16637 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Introduce a RandonNumberGenerator class. Refactor the random/private_random uses in Isolate/Context.

The RandomNumberGenerator is a pseudorandom number generator
with 48-bit state. It is properly seeded using either

(1) the --random-seed if specified, or
(2) the entropy_source function if configured, or
(3) /dev/urandom if available, or
(4) falls back to Time and TimeTicks based seeding.

Each Isolate now contains a RandomNumberGenerator, which replaces
the previous private_random_seed.

Every native context still has its own random_seed. But this random
seed is now properly initialized during bootstrapping,
instead of on-demand initialization. This will allow us to cleanup
and speedup the HRandom implementation quite a lot (this is delayed
for a followup CL)!

Also stop messing with the system rand()/random(), which should
not be done from a library anyway! We probably re-seeded the
libc rand()/random() after the application (i.e. Chrome) already
seeded it (with better entropy than what we used).

Another followup CL will replace the use of the per-isolate
random number generator for the address randomization and
thereby get rid of the Isolate::UncheckedCurrent() usage in
the platform code.

TEST=cctest/test-random-number-generator,cctest/test-random
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/23548024

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16612 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Instead of globally tracking allocated space limits, which was
not implemented properly anyway (i.e. lack of synchronization
on the reading side), track it per MemoryAllocator (that is
per heap/isolate).

In particular, avoid to call IsBadWritePtr() on Windows, it is
obsolete and Microsoft strongly discourages its usage.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/23903008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16542 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Drop the previous Semaphore class from platform files.

Add new Semaphore class using the new TimeDelta class for
the WaitFor() operation. Consistently assert correct behaviour
for the different implementations.

Improve test coverage of the Semaphore class.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/23748003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16473 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Drop the previous Mutex and ScopedLock classes from platform files.

Add new Mutex, RecursiveMutex and LockGuard classes, which are
designed after their C++11 counterparts, so that at some point
we can simply drop our custom code and switch to the C++11
classes. We distinguish regular and recursive mutexes, as the
latter don't work well with condition variables, which will be
introduced by a followup CL.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/23625003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16416 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

These classes are meant to replace OS::Ticks() and OS::TimeCurrentMillis(),
which are broken in several ways. The ElapsedTimer class implements a
stopwatch using TimeTicks::HighResNow() for high resolution, monotonic
timing.

Also fix the CpuProfile::GetStartTime() and CpuProfile::GetEndTime()
methods to actually return the time relative to the unix epoch as stated
in the documentation (previously that was relative to some arbitrary
point in time, i.e. boot time).

The previous Windows issues have been resolved, and we now use GetTickCount64()
on Windows Vista and later, falling back to timeGetTime() with rollover
protection for earlier Windows versions.

BUG=v8:2853
R=machenbach@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/23490015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16413 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Revert "Cross-compiling from Linux to Android requires -lrt for the host toolset.", "Fix Visual Studio debug build after r16398." and "Reland "Add Chromium-style TimeDelta, Time and TimeTicks classes, and a new ElapsedTimer class.""

This reverts commit r16398, r16399 and r16402 for breaking the Windows
WebKit tests. Will reland fix which doesn't use High Resolution Timer
for ElapsedTimer (we suspect QueryPerformanceCounter overhead is
responsible for test breakage).

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/23710002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16405 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

These classes are meant to replace OS::Ticks() and OS::TimeCurrentMillis(),
which are broken in several ways. The ElapsedTimer class implements a
stopwatch using TimeTicks::HighResNow() for high resolution, monotonic
timing.

Also fix the CpuProfile::GetStartTime() and CpuProfile::GetEndTime()
methods to actually return the time relative to the unix epoch as stated
in the documentation (previously that was relative to some arbitrary
point in time, i.e. boot time).

BUG=v8:2853
R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/23469013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16398 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit r16390 for breaking the Windows build. Will
reland fixed version, which also uses the platform/ folder instead
of time/ folder as per offline discussion.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/23690003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16391 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

These classes are meant to replace OS::Ticks() and OS::TimeCurrentMillis(),
which are broken in several ways. The ElapsedTimer class implements a
stopwatch using TimeTicks::HighResNow() for high resolution, monotonic
timing.

Also fix the CpuProfile::GetStartTime() and CpuProfile::GetEndTime()
methods to actually return the time relative to the unix epoch as stated
in the documentation (previously that was relative to some arbitrary
point in time, i.e. boot time).

BUG=v8:2853
R=machenbach@chromium.org, yurys@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=16388

Review URL: https://codereview.chromium.org/23295034

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16390 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit r16388 for breaking build due to merge typo,
will reland with typo fixed.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/23698002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16389 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

These classes are meant to replace OS::Ticks() and OS::TimeCurrentMillis(),
which are broken in several ways. The ElapsedTimer class implements a
stopwatch using TimeTicks::HighResNow() for high resolution, monotonic
timing.

Also fix the CpuProfile::GetStartTime() and CpuProfile::GetEndTime()
methods to actually return the time relative to the unix epoch as stated
in the documentation (previously that was relative to some arbitrary
point in time, i.e. boot time).

BUG=v8:2853
R=machenbach@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/23295034

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16388 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Revert "Fix NaCl build."
Revert "Revert target arch detection."
Revert "Fix typo."
Revert "Simplify implementation of Mutex."
Revert "Fix for older clang releases that lack __has_extension."
Revert "Reland initial bits of "Implement correct OS and CC detection.""

TBR=danno@chromium.org,svenpanne@chromium.org

Review URL: https://codereview.chromium.org/21095008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15976 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also moves Mutex to its own file mutex.{cc,h}.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/21087012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15964 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/20283002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15876 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/20179004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15873 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/20274002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15872 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/19490010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15830 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

No need to duplicate OS::NumberOfCores() for every POSIX platform.
No need to duplicate OS::Sleep() for every POSIX platform.
No need to duplicate OS::Abort() and OS::DebugBreak() for every POSIX platform.
No need to duplicate OS::Free() for every POSIX platform.
Move #ifdef'd OS::ProtectCode() and OS::Guard() to platform-posix.cc.
No need to duplicate OS::AllocateAlignment() for every POSIX platform.
No need to duplicate OS::PostSetUp() for every POSIX platform.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/20014005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15820 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Add a common templatized implementation of OS::DumpBacktrace() and OS::StackWalk() to platform-posix.h and use it for Linux, Mac OS X and FreeBSD.

R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/18431004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15644 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The Mutex implementation is the same for all 6 POSIX platformats, just
like of them use the sched_yield() to implement Thread::YieldCPU().

R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/18335008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15623 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/18509003

Patch from Haitao Feng <haitao.feng@intel.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15510 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/18037002

Patch from Haitao Feng <haitao.feng@intel.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15391 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The operation is already implemented in atomicops.h No need to duplicate the code.

BUG=None
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/17222004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15218 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This will make it easier to use other STL headers in the future

Review URL: https://codereview.chromium.org/14362023

Patch from Jochen Eisinger <jochen@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14352 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Renamed SignalSender to SamplerThread to match platforms that don't support signal sending.

Cygwin and Windows implementations are almost identical. Mac OS X uses different API to suspend thread but apart from that it is very similar to Windows implenenation.

BUG=None

Review URL: https://codereview.chromium.org/14264009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14272 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This is just shuffling some code around to make comparing the platform files easier.

Made cygwin/nullos support a bit more complete on the way.

Review URL: https://codereview.chromium.org/14162004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14250 ce2b1a6d-e550-0410-aec6-3dcde31c8c00