Commit Graph

12 Commits

Author SHA1 Message Date
yangguo
1354b1bf37 [interpreter] statement position always overwrites earlier positions.
If a statement or expression does not produce any bytecode, it's position
should always be overwritten by a following statement position.

R=mstarzinger@chromium.org, vogelheim@chromium.org
BUG=v8:4680
LOG=N

Review URL: https://codereview.chromium.org/1854113002

Cr-Commit-Position: refs/heads/master@{#35252}
2016-04-05 09:14:19 +00:00
yangguo
f7e7ba1125 [interpreter] add some expression positions.
Statement positions should overwrite expression positions if they
have the same bytecode offset.

R=mstarzinger@chromium.org, vogelheim@chromium.org
BUG=v8:4680,v8:4689
LOG=N

Review URL: https://codereview.chromium.org/1855913002

Cr-Commit-Position: refs/heads/master@{#35236}
2016-04-04 12:37:48 +00:00
yangguo
3c1dc424d3 [ignition, debugger] correctly set position for return with elided bytecode.
We may not emit bytecode for the evaluation of the to-be-returned
expression. In that case we cannot set two return positions for a return
statement (one before and one after the expression evaluation). This
sets the interpreter apart from full-codegen.

Make sure that we always have the second of the two return positions.

Note that we end up with separate test cases for ignition and FCG.

R=rmcilroy@chromium.org, vogelheim@chromium.org
BUG=v8:4690
LOG=N

Review URL: https://codereview.chromium.org/1801473003

Cr-Commit-Position: refs/heads/master@{#34771}
2016-03-15 08:28:03 +00:00
yangguo
44e9622aea [debugger] Ensure at least one breakable position per function.
The function literal consists of a list of statements. Each statement
is associated with a statement position including break location. The
only exception to this rule is when the function immediately throws if
scope resolution found an illegal redeclaration. Make sure that we add a
break location for this case as well. The debugger relies on this.

R=bmeurer@chromium.org, vogelheim@chromium.org
BUG=v8:4690
LOG=N

Review URL: https://codereview.chromium.org/1759603002

Cr-Commit-Position: refs/heads/master@{#34422}
2016-03-02 10:31:59 +00:00
rmcilroy
d58201589b [Interpreter] Log source positions for bytecode arrays.
Add support to log source position offsets to the profiler. As part of
this change PositionsRecorder is split into two, with the subset needed
by log.cc moved into log.h and the remainder kept in assembler.h as
AssemblerPositionsRecorder. The interpreter's source position table
builder is updated to log positions when the profiler is active.

BUG=v8:4766
LOG=N

Review URL: https://codereview.chromium.org/1737043002

Cr-Commit-Position: refs/heads/master@{#34416}
2016-03-02 02:10:53 +00:00
vogelheim
cc40fcec6f Encode interpreter::SourcePositionTable as variable-length ints.
This reduces the memory consumption of SourcePositionTable by ca. 2/3.
Over Octane, this reduces the source position table memory consumption
from ~370kB to ~115kB, which makes it ca. 10% of the total bytecode size
(~1.1MB)

----------------

Reland CL in order to relive the glory days, and also fix memory leak w/ ENABLE_SLOW_CHECKS.

SourcePositionTableBuilder used to have a no destructor since everything
was zone allocated. But if ENABLE_SLOW_CHECKS, it has a heap allocated member
and thus needs a proper constructor. ASAN thankfully notices this, and V8 no
longer builds since this is called during mksnapshot.

Breakge example: http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20ASAN%20arm64%20-%20debug%20builder/builds/4829

R=jochen@chromium.org, yangguo@chromium.org, rmcilroy@chromium.org
BUG=v8:4690
LOG=y

Committed: https://crrev.com/a6f41f7b8226555c5900440f6e3092b3545ee0f6
Cr-Commit-Position: refs/heads/master@{#34250}

patch from issue 1704943002 at patchset 200001 (http://crrev.com/1704943002#ps200001)

Review URL: https://codereview.chromium.org/1731883003

Cr-Commit-Position: refs/heads/master@{#34256}
2016-02-24 17:13:53 +00:00
vogelheim
b38eabe845 Revert of Encode interpreter::SourcePositionTable as variable-length ints. (patchset #10 id:200001 of https://codereview.chromium.org/1704943002/ )
Reason for revert:
Build failure on Linux64 arm64 ASAN:

http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20ASAN%20arm64%20-%20debug%20builder/builds/4829

(Leaks memory, somehow.)

Original issue's description:
> Encode interpreter::SourcePositionTable as variable-length ints.
>
> This reduces the memory consumption of SourcePositionTable by ca. 2/3.
> Over Octane, this reduces the source position table memory consumption
> from ~370kB to ~115kB, which makes it ca. 10% of the total bytecode size
> (~1.1MB)
>
> BUG=
>
> Committed: https://crrev.com/a6f41f7b8226555c5900440f6e3092b3545ee0f6
> Cr-Commit-Position: refs/heads/master@{#34250}

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

Review URL: https://codereview.chromium.org/1728193003

Cr-Commit-Position: refs/heads/master@{#34251}
2016-02-24 13:33:08 +00:00
vogelheim
a6f41f7b82 Encode interpreter::SourcePositionTable as variable-length ints.
This reduces the memory consumption of SourcePositionTable by ca. 2/3.
Over Octane, this reduces the source position table memory consumption
from ~370kB to ~115kB, which makes it ca. 10% of the total bytecode size
(~1.1MB)

BUG=

Review URL: https://codereview.chromium.org/1704943002

Cr-Commit-Position: refs/heads/master@{#34250}
2016-02-24 12:53:54 +00:00
yangguo
9249890124 [interpreter, debugger] implement bytecode break location iterator.
R=rmcilroy@chromium.org, vogelheim@chromium.org
BUG=v8:4690
LOG=N

Review URL: https://codereview.chromium.org/1682853004

Cr-Commit-Position: refs/heads/master@{#33904}
2016-02-11 15:31:20 +00:00
yangguo
24b40f35f4 [debugger] introduce abstract interface for break location.
The break location heavily relies on relocation info. This change
abstracts that away. Currently there is only one implementation for
this interface, for JIT code. Future changes will introduce an
implementation to iterate bytecode arrays.

R=rmcilroy@chromium.org, vogelheim@chromium.org
BUG=v8:4690
LOG=N

Review URL: https://codereview.chromium.org/1682853003

Cr-Commit-Position: refs/heads/master@{#33869}
2016-02-10 14:20:04 +00:00
yangguo
85eff14c37 [interpreter] source positions should not be emitted for dead code.
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/1668863002

Cr-Commit-Position: refs/heads/master@{#33775}
2016-02-05 13:29:45 +00:00
yangguo
876d35e228 [interpreter] add source positions for call and call-new.
This change adds the basic infrastructure to record source
positions for bytecode.

R=rmcilroy@chromium.org, vogelheim@chromium.org
BUG=v8:4960
LOG=N

Review URL: https://codereview.chromium.org/1662983002

Cr-Commit-Position: refs/heads/master@{#33726}
2016-02-04 10:50:18 +00:00