callback_entrypoint_address call could return nullptr and therefore
causes seg fault intermittently.

R=jochen@chromium.org, lpy@chromium.org, yangguo@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2274573007
Cr-Commit-Position: refs/heads/master@{#38952}

This patch is based on alph's CL https://codereview.chromium.org/2128613004/.

This patch makes GetStackSample propogate the register state when using
simulator helper, and adds argument to avoid using register state from simulator
when pass the native register state.

BUG=v8:4789
LOG=N

Review-Url: https://codereview.chromium.org/2189513002
Cr-Commit-Position: refs/heads/master@{#38554}

When it is in executing JS state there should be a JS stack.
Having no stack means something is wrong with frame pointer, so
just skip the bogus sample.

Review-Url: https://codereview.chromium.org/2151103002
Cr-Commit-Position: refs/heads/master@{#37802}

Revert "Move SimulatorHelper into V8 out of profiler clients."

This reverts commit b8372411.

Revert "Make use of v8::TickSample instead of v8::internal::TickSample in logger."

This reverts commit c3a16f0a.

Revert "Clean up SimulatorHelper code."

This reverts commit 8ee236e1.

BUG=v8:5193
TBR=alph@chromium.org, yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2138643003
Cr-Commit-Position: refs/heads/master@{#37626}

Review-Url: https://codereview.chromium.org/2131643003
Cr-Commit-Position: refs/heads/master@{#37619}

Clients should not know about the simulator.

BUG=v8:4789

Review-Url: https://codereview.chromium.org/2128613004
Cr-Commit-Position: refs/heads/master@{#37617}

We want to eventually move the profiling functionality out of V8 as library,
this patch exposes TickSample and its APIs in v8-profiler.h so that when
embedders use library, they can have more details.

Minor change: Rename tick-sample.[h|cc] to simulator-helper.[h|cc].

BUG=v8:4789
LOG=N

Review-Url: https://codereview.chromium.org/2105943002
Cr-Commit-Position: refs/heads/master@{#37564}

Prior to this commit, calls to C++ builtins created standard exit
frames, which are skipped when constructing JS stack traces. In order to
show these calls on traces, we introduce a new builtin exit frame type.

Builtin exit frames contain target and new.target on the stack and are
not skipped during stack trace construction.

BUG=v8:4815
R=bmeurer@chromium.org, yangguo@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel;tryserver.v8:v8_linux_nosnap_dbg

Committed: https://crrev.com/3c60c6b105f39344f93a8407f41534e5e60cf19a
Review-Url: https://codereview.chromium.org/2090723005
Cr-Original-Commit-Position: refs/heads/master@{#37384}
Cr-Commit-Position: refs/heads/master@{#37416}

Revert of [builtins] New frame type for exits to C++ builtins (patchset #5 id:80001 of https://codereview.chromium.org/2090723005/ )

Reason for revert:
Looks like this breaks on nosnap: http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/7626

Original issue's description:
> [builtins] New frame type for exits to C++ builtins
>
> Prior to this commit, calls to C++ builtins created standard exit
> frames, which are skipped when constructing JS stack traces. In order to
> show these calls on traces, we introduce a new builtin exit frame type.
>
> Builtin exit frames contain target and new.target on the stack and are
> not skipped during stack trace construction.
>
> BUG=v8:4815
> R=bmeurer@chromium.org, yangguo@chromium.org
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/3c60c6b105f39344f93a8407f41534e5e60cf19a
> Cr-Commit-Position: refs/heads/master@{#37384}

TBR=yangguo@chromium.org,jgruber@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4815

Review-Url: https://codereview.chromium.org/2106113002
Cr-Commit-Position: refs/heads/master@{#37394}

Prior to this commit, calls to C++ builtins created standard exit
frames, which are skipped when constructing JS stack traces. In order to
show these calls on traces, we introduce a new builtin exit frame type.

Builtin exit frames contain target and new.target on the stack and are
not skipped during stack trace construction.

BUG=v8:4815
R=bmeurer@chromium.org, yangguo@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2090723005
Cr-Commit-Position: refs/heads/master@{#37384}

The main fix is to mark stack memory the SafeStackFrameIterator
accesses as initialied.

Drive-by: Make sure we bail out when the simulator is in the
process of updating FP/SP registers.

BUG=v8:5156

Review-Url: https://codereview.chromium.org/2104763002
Cr-Commit-Position: refs/heads/master@{#37315}

Make it a part of V8 API GetStackSample function.
Also expose external_callback_entry in SampleInfo to break dependency
of clients on internal V8 structures.

BUG=v8:4789

Committed: https://crrev.com/70acfe39c07322144f5fe9b40bb584a8b1099ffd
Review-Url: https://codereview.chromium.org/2007343003
Cr-Original-Commit-Position: refs/heads/master@{#36831}
Cr-Commit-Position: refs/heads/master@{#36836}

Revert of Move stack trace extraction code out of TickSample::Init (patchset #1 id:1 of https://codereview.chromium.org/2007343003/ )

Reason for revert:
Make MSAN arm bot flaky

Original issue's description:
> Move stack trace extraction code out of TickSample::Init
>
> Make it a part of V8 API GetStackSample function.
> Also expose external_callback_entry in SampleInfo to break dependency
> of clients on internal V8 structures.
>
> BUG=v8:4789
>
> Committed: https://crrev.com/70acfe39c07322144f5fe9b40bb584a8b1099ffd
> Cr-Commit-Position: refs/heads/master@{#36831}

TBR=yangguo@chromium.org,lpy@chromium.org,jochen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4789

Review-Url: https://codereview.chromium.org/2049903002
Cr-Commit-Position: refs/heads/master@{#36835}

Make it a part of V8 API GetStackSample function.
Also expose external_callback_entry in SampleInfo to break dependency
of clients on internal V8 structures.

BUG=v8:4789

Review-Url: https://codereview.chromium.org/2007343003
Cr-Commit-Position: refs/heads/master@{#36831}

Since we are going to move Sampler as library, we creates tick-sample.[h|cc] for
TickSample, in order to maintain legacy code.

BUG=v8:4994
LOG=n

Review-Url: https://codereview.chromium.org/1952393002
Cr-Commit-Position: refs/heads/master@{#36267}