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  1. 25 Aug, 2021 1 commit
  3. 24 Aug, 2021 1 commit
    • Dan Elphick's avatar
      Reland "[include] Split out v8.h" · ec06bb6c
      Dan Elphick authored 
      This is a reland of d1b27019

Fixes include:
Adding missing file to bazel build
Forward-declaring classing before friend-classing them to fix win/gcc
Add missing v8-isolate.h include for vtune builds

Original change's description:
> [include] Split out v8.h
>
> This moves every single class/function out of include/v8.h into a
> separate header in include/, which v8.h then includes so that
> externally nothing appears to have changed.
>
> Every include of v8.h from inside v8 has been changed to a more
> fine-grained include.
>
> Previously inline functions defined at the bottom of v8.h would call
> private non-inline functions in the V8 class. Since that class is now
> in v8-initialization.h and is rarely included (as that would create
> dependency cycles), this is not possible and so those methods have been
> moved out of the V8 class into the namespace v8::api_internal.
>
> None of the previous files in include/ now #include v8.h, which means
> if embedders were relying on this transitive dependency then it will
> give compile failures.
>
> v8-inspector.h does depend on v8-scripts.h for the time being to ensure
> that Chrome continue to compile but that change will be reverted once
> those transitive #includes in chrome are changed to include it directly.
>
> Full design:
> https://docs.google.com/document/d/1rTD--I8hCAr-Rho1WTumZzFKaDpEp0IJ8ejZtk4nJdA/edit?usp=sharing
>
> Bug: v8:11965
> Change-Id: I53b84b29581632710edc80eb11f819c2097a2877
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3097448
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#76424}

Cq-Include-Trybots: luci.v8.try:v8_linux_vtunejit
Bug: v8:11965
Change-Id: I99f5d3a73bf8fe25b650adfaf9567dc4e44a09e6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3113629Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
Reviewed-by: 's avatarCamillo Bruni <cbruni@chromium.org>
Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
Reviewed-by: 's avatarJakob Kummerow <jkummerow@chromium.org>
Reviewed-by: 's avatarSimon Zünd <szuend@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76460}
      ec06bb6c
  5. 23 Aug, 2021 2 commits
    • Dan Elphick's avatar
      Revert "[include] Split out v8.h" · 44fe02ce
      Dan Elphick authored 
      This reverts commit d1b27019.

Reason for revert: Broke vtune build, tsan build and possibly others

Original change's description:
> [include] Split out v8.h
>
> This moves every single class/function out of include/v8.h into a
> separate header in include/, which v8.h then includes so that
> externally nothing appears to have changed.
>
> Every include of v8.h from inside v8 has been changed to a more
> fine-grained include.
>
> Previously inline functions defined at the bottom of v8.h would call
> private non-inline functions in the V8 class. Since that class is now
> in v8-initialization.h and is rarely included (as that would create
> dependency cycles), this is not possible and so those methods have been
> moved out of the V8 class into the namespace v8::api_internal.
>
> None of the previous files in include/ now #include v8.h, which means
> if embedders were relying on this transitive dependency then it will
> give compile failures.
>
> v8-inspector.h does depend on v8-scripts.h for the time being to ensure
> that Chrome continue to compile but that change will be reverted once
> those transitive #includes in chrome are changed to include it directly.
>
> Full design:
> https://docs.google.com/document/d/1rTD--I8hCAr-Rho1WTumZzFKaDpEp0IJ8ejZtk4nJdA/edit?usp=sharing
>
> Bug: v8:11965
> Change-Id: I53b84b29581632710edc80eb11f819c2097a2877
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3097448
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#76424}

Bug: v8:11965
Change-Id: Id57313ae992e720c8b19abc975cd69729e1344aa
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3113627
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Owners-Override: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76428}
      44fe02ce
    • Dan Elphick's avatar
      [include] Split out v8.h · d1b27019
      Dan Elphick authored 
      This moves every single class/function out of include/v8.h into a
separate header in include/, which v8.h then includes so that
externally nothing appears to have changed.

Every include of v8.h from inside v8 has been changed to a more
fine-grained include.

Previously inline functions defined at the bottom of v8.h would call
private non-inline functions in the V8 class. Since that class is now
in v8-initialization.h and is rarely included (as that would create
dependency cycles), this is not possible and so those methods have been
moved out of the V8 class into the namespace v8::api_internal.

None of the previous files in include/ now #include v8.h, which means
if embedders were relying on this transitive dependency then it will
give compile failures.

v8-inspector.h does depend on v8-scripts.h for the time being to ensure
that Chrome continue to compile but that change will be reverted once
those transitive #includes in chrome are changed to include it directly.

Full design:
https://docs.google.com/document/d/1rTD--I8hCAr-Rho1WTumZzFKaDpEp0IJ8ejZtk4nJdA/edit?usp=sharing

Bug: v8:11965
Change-Id: I53b84b29581632710edc80eb11f819c2097a2877
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3097448Reviewed-by: 's avatarYang Guo <yangguo@chromium.org>
Reviewed-by: 's avatarCamillo Bruni <cbruni@chromium.org>
Reviewed-by: 's avatarJakob Kummerow <jkummerow@chromium.org>
Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76424}
      d1b27019
  7. 25 Feb, 2021 1 commit
  9. 17 Nov, 2020 1 commit
  11. 19 Jun, 2020 1 commit
  13. 18 Jun, 2020 1 commit
    • Dan Elphick's avatar
      Reland "[heap] Make ReadOnlySpace use bump pointer allocation" · 32b911f9
      Dan Elphick authored 
      This reverts commit f78d69fa.

With https://chromium-review.googlesource.com/c/v8/v8/+/2243216,
incorrect MemoryChunk::FromHeapObject uses are now fixed.

Original change's description:
> Revert "[heap] Make ReadOnlySpace use bump pointer allocation"
> 
> This reverts commit 81c34968 and also
> 490f3580 which depends on the former.
> 
> Reason for revert: Break CFI tests in chromium https://ci.chromium.org/p/chromium/builders/ci/Linux%20CFI/17438
> Original change's description:
> > [heap] Make ReadOnlySpace use bump pointer allocation
> >
> > This changes ReadOnlySpace to no longer be a PagedSpace but instead it
> > is now a BaseSpace. BasicSpace is a new base class that Space inherits
> > from and which has no allocation methods and does not dictate how the
> > pages should be held.
> >
> > ReadOnlySpace unlike Space holds its pages as a
> > std::vector<ReadOnlyPage>, where ReadOnlyPage directly subclasses
> > BasicMemoryChunk, meaning they do not have prev_ and next_ pointers and
> > cannot be held in a heap::List. This is desirable since with pointer
> > compression we would like to remap these pages to different memory
> > addresses which would be impossible with a heap::List.
> >
> > Since ReadOnlySpace no longer uses most of the code from the other
> > Spaces it makes sense to simplify its memory allocation to use a simple
> > bump pointer and always allocate a new page whenever an allocation
> > exceeds the remaining space on the final page.
> >
> > Change-Id: Iee6d9f96cfb174b4026ee671ee4f897909b38418
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2209060
> > Commit-Queue: Dan Elphick <delphick@chromium.org>
> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#68137}
> 
> TBR=ulan@chromium.org,delphick@chromium.org
> 
> # Not skipping CQ checks because original CL landed > 1 day ago.
> 
> Change-Id: I68c9834872e55eb833be081f8ff99b786bfa9894
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2232552
> Commit-Queue: Dan Elphick <delphick@chromium.org>
> Reviewed-by: Dan Elphick <delphick@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68211}

TBR=ulan@chromium.org,delphick@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: Id5b3cce41b5dec1dca816c05848d183790b1cc05
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2250254Reviewed-by: 's avatarDan Elphick <delphick@chromium.org>
Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68407}
      32b911f9
  15. 17 Jun, 2020 1 commit
  17. 05 Jun, 2020 1 commit
    • Dan Elphick's avatar
      Revert "[heap] Make ReadOnlySpace use bump pointer allocation" · f78d69fa
      Dan Elphick authored 
      This reverts commit 81c34968 and also
490f3580 which depends on the former.

Reason for revert: Break CFI tests in chromium https://ci.chromium.org/p/chromium/builders/ci/Linux%20CFI/17438
Original change's description:
> [heap] Make ReadOnlySpace use bump pointer allocation
>
> This changes ReadOnlySpace to no longer be a PagedSpace but instead it
> is now a BaseSpace. BasicSpace is a new base class that Space inherits
> from and which has no allocation methods and does not dictate how the
> pages should be held.
>
> ReadOnlySpace unlike Space holds its pages as a
> std::vector<ReadOnlyPage>, where ReadOnlyPage directly subclasses
> BasicMemoryChunk, meaning they do not have prev_ and next_ pointers and
> cannot be held in a heap::List. This is desirable since with pointer
> compression we would like to remap these pages to different memory
> addresses which would be impossible with a heap::List.
>
> Since ReadOnlySpace no longer uses most of the code from the other
> Spaces it makes sense to simplify its memory allocation to use a simple
> bump pointer and always allocate a new page whenever an allocation
> exceeds the remaining space on the final page.
>
> Change-Id: Iee6d9f96cfb174b4026ee671ee4f897909b38418
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2209060
> Commit-Queue: Dan Elphick <delphick@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68137}

TBR=ulan@chromium.org,delphick@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I68c9834872e55eb833be081f8ff99b786bfa9894
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2232552
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: 's avatarDan Elphick <delphick@chromium.org>
Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68211}
      f78d69fa
  19. 03 Jun, 2020 1 commit
    • Dan Elphick's avatar
      [heap] Make ReadOnlySpace use bump pointer allocation · 81c34968
      Dan Elphick authored 
      This changes ReadOnlySpace to no longer be a PagedSpace but instead it
is now a BaseSpace. BasicSpace is a new base class that Space inherits
from and which has no allocation methods and does not dictate how the
pages should be held.

ReadOnlySpace unlike Space holds its pages as a
std::vector<ReadOnlyPage>, where ReadOnlyPage directly subclasses
BasicMemoryChunk, meaning they do not have prev_ and next_ pointers and
cannot be held in a heap::List. This is desirable since with pointer
compression we would like to remap these pages to different memory
addresses which would be impossible with a heap::List.

Since ReadOnlySpace no longer uses most of the code from the other
Spaces it makes sense to simplify its memory allocation to use a simple
bump pointer and always allocate a new page whenever an allocation
exceeds the remaining space on the final page.

Change-Id: Iee6d9f96cfb174b4026ee671ee4f897909b38418
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2209060
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68137}
      81c34968
  21. 14 May, 2020 1 commit
  23. 04 Nov, 2019 1 commit
  25. 22 Oct, 2019 2 commits
  27. 16 Oct, 2019 1 commit
    • Simon Zünd's avatar
      Reland "Unconditionally enable snapshot builds and remove 'v8_use_snapshot'" · 69efc4c3
      Simon Zünd authored 
      This is a reland of 1c56974f

This is a plain reland of the original CL. The original CL was speculatively
reverted, but ended up not being the cause for bot failures.

Original change's description:
> Unconditionally enable snapshot builds and remove 'v8_use_snapshot'
>
> This CL removes 'v8_use_snapshot' and the usages of the implied
> V8_USE_SNAPSHOT define. One test runner unittest was updated to use the
> "asan" variant instead of the now obsolete "no_snap" variant.
>
> Related chromium CL: https://crrev.com/c/1796325.
>
> Bug: v8:8531
> Change-Id: I5da7c9f8e9110fe7bc0f4e4f821bcb7f7d98f927
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1784282
> Commit-Queue: Simon Zünd <szuend@chromium.org>
> Reviewed-by: Tamer Tas <tmrts@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Nico Weber <thakis@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64290}

TBR=thakis@chromium.org,machenbach@chromium.org,mstarzinger@chromium.org,jgruber@chromium.org,tmrts@chromium.org,szuend@chromium.org

Bug: v8:8531
Change-Id: Id75a802279238138f7aefec62e0b6425a5acc08d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1864649Reviewed-by: 's avatarSimon Zünd <szuend@chromium.org>
Reviewed-by: 's avatarTamer Tas <tmrts@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64305}
      69efc4c3
  29. 15 Oct, 2019 2 commits
  31. 11 Oct, 2019 1 commit
  33. 09 Sep, 2019 1 commit
  35. 31 Jul, 2019 1 commit
    • Seth Brenith's avatar
      Reland "Add postmortem debugging helper library" · 0921e8f2
      Seth Brenith authored 
      This is a reland of 517ab73f

Updates since original: now compressed pointers passed to the function
GetObjectProperties are required to be sign-extended. Previously, the
function allowed zero-extended values, but that led to ambiguity on
pointers like 0x88044919: is it compressed or is the heap range actually
centered on 0x100000000?

Original change's description:
> Add postmortem debugging helper library
>
> This change begins to implement the functionality described in
> https://docs.google.com/document/d/1evHnb1uLlSbvHAAsmOXyc25x3uh1DjgNa8u1RHvwVhk/edit#
> for investigating V8 state in crash dumps.
>
> This change adds a new library, v8_debug_helper, for providing platform-
> agnostic assistance with postmortem debugging. This library can be used
> by extensions built for debuggers such as WinDbg or lldb. Its public API
> is described by debug-helper.h; currently the only method it exposes is
> GetObjectProperties, but we'd like to add more functionality over time.
> The API surface is restricted to plain C-style structs and pointers, so
> that it's easy to link from a debugger extension built with a different
> toolchain.
>
> This change also adds a new cctest file to exercise some basic
> interaction with the new library.
>
> The API function GetObjectProperties takes an object pointer (which
> could be compressed, or weak, or a SMI), and returns a string
> description of the object and a list of properties the object contains.
> For now, the list of properties is entirely based on Torque object
> definitions, but we expect to add custom properties in future updates so
> that it can be easier to make sense of complex data structures such as
> dictionaries.
>
> GetObjectProperties does several things that are intended to generate
> somewhat useful results even in cases where memory may be corrupt or
> unavailable:
> - The caller may optionally provide a type string which will be used if
>   the memory for the object's Map is inaccessible.
> - All object pointers are compared against the list of known objects
>   generated by mkgrokdump. The caller may optionally provide the
>   pointers for the first pages of various heap spaces, to avoid spurious
>   matches. If those pointers are not provided, then any matches are
>   prefixed with "maybe" in the resulting description string, such as
>   "maybe UndefinedValue (0x4288000341 <Oddball>)".
>
> Bug: v8:9376
>
> Change-Id: Iebf3cc2dea3133c7811bcefcdf38d9458b02fded
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1628012
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Michael Stanton <mvstanton@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62882}

Bug: v8:9376
Change-Id: I866a1cc9d4c34bfe10c7b98462451fe69763cf3f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1717090Reviewed-by: 's avatarMichael Achenbach <machenbach@chromium.org>
Reviewed-by: 's avatarMichael Stanton <mvstanton@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#63008}
      0921e8f2
  37. 24 Jul, 2019 1 commit
    • Zhi An Ng's avatar
      Revert "Add postmortem debugging helper library" · 6747e3a1
      Zhi An Ng authored 
      This reverts commit 517ab73f.

Reason for revert: Test failures https://bugs.chromium.org/p/v8/issues/detail?id=9538

Original change's description:
> Add postmortem debugging helper library
> 
> This change begins to implement the functionality described in
> https://docs.google.com/document/d/1evHnb1uLlSbvHAAsmOXyc25x3uh1DjgNa8u1RHvwVhk/edit#
> for investigating V8 state in crash dumps.
> 
> This change adds a new library, v8_debug_helper, for providing platform-
> agnostic assistance with postmortem debugging. This library can be used
> by extensions built for debuggers such as WinDbg or lldb. Its public API
> is described by debug-helper.h; currently the only method it exposes is
> GetObjectProperties, but we'd like to add more functionality over time.
> The API surface is restricted to plain C-style structs and pointers, so
> that it's easy to link from a debugger extension built with a different
> toolchain.
> 
> This change also adds a new cctest file to exercise some basic
> interaction with the new library.
> 
> The API function GetObjectProperties takes an object pointer (which
> could be compressed, or weak, or a SMI), and returns a string
> description of the object and a list of properties the object contains.
> For now, the list of properties is entirely based on Torque object
> definitions, but we expect to add custom properties in future updates so
> that it can be easier to make sense of complex data structures such as
> dictionaries.
> 
> GetObjectProperties does several things that are intended to generate
> somewhat useful results even in cases where memory may be corrupt or
> unavailable:
> - The caller may optionally provide a type string which will be used if
>   the memory for the object's Map is inaccessible.
> - All object pointers are compared against the list of known objects
>   generated by mkgrokdump. The caller may optionally provide the
>   pointers for the first pages of various heap spaces, to avoid spurious
>   matches. If those pointers are not provided, then any matches are
>   prefixed with "maybe" in the resulting description string, such as
>   "maybe UndefinedValue (0x4288000341 <Oddball>)".
> 
> Bug: v8:9376
> 
> Change-Id: Iebf3cc2dea3133c7811bcefcdf38d9458b02fded
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1628012
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Michael Stanton <mvstanton@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62882}

TBR=yangguo@chromium.org,mvstanton@chromium.org,jgruber@chromium.org,tebbi@chromium.org,seth.brenith@microsoft.com

Change-Id: Ia078f2e8d101d2375b5db88021b2d65d28f1b075
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9376
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1716033Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62899}
      6747e3a1
  39. 23 Jul, 2019 1 commit
    • Seth Brenith's avatar
      Add postmortem debugging helper library · 517ab73f
      Seth Brenith authored 
      This change begins to implement the functionality described in
https://docs.google.com/document/d/1evHnb1uLlSbvHAAsmOXyc25x3uh1DjgNa8u1RHvwVhk/edit#
for investigating V8 state in crash dumps.

This change adds a new library, v8_debug_helper, for providing platform-
agnostic assistance with postmortem debugging. This library can be used
by extensions built for debuggers such as WinDbg or lldb. Its public API
is described by debug-helper.h; currently the only method it exposes is
GetObjectProperties, but we'd like to add more functionality over time.
The API surface is restricted to plain C-style structs and pointers, so
that it's easy to link from a debugger extension built with a different
toolchain.

This change also adds a new cctest file to exercise some basic
interaction with the new library.

The API function GetObjectProperties takes an object pointer (which
could be compressed, or weak, or a SMI), and returns a string
description of the object and a list of properties the object contains.
For now, the list of properties is entirely based on Torque object
definitions, but we expect to add custom properties in future updates so
that it can be easier to make sense of complex data structures such as
dictionaries.

GetObjectProperties does several things that are intended to generate
somewhat useful results even in cases where memory may be corrupt or
unavailable:
- The caller may optionally provide a type string which will be used if
  the memory for the object's Map is inaccessible.
- All object pointers are compared against the list of known objects
  generated by mkgrokdump. The caller may optionally provide the
  pointers for the first pages of various heap spaces, to avoid spurious
  matches. If those pointers are not provided, then any matches are
  prefixed with "maybe" in the resulting description string, such as
  "maybe UndefinedValue (0x4288000341 <Oddball>)".

Bug: v8:9376

Change-Id: Iebf3cc2dea3133c7811bcefcdf38d9458b02fded
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1628012
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: 's avatarYang Guo <yangguo@chromium.org>
Reviewed-by: 's avatarMichael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62882}
      517ab73f
  41. 05 Jul, 2019 1 commit
  43. 24 Jun, 2019 1 commit
  45. 17 Jun, 2019 1 commit
  47. 31 May, 2019 1 commit
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    • Maciej Goszczycki's avatar
      Reland "[heap] Skip ro-space from heap iterators, add CombinedHeapIterator." · 9c062093
      Maciej Goszczycki authored 
      Code relocation info is now always allocated in old-space. Before relocation
info allocated for placeholders and builtins (which get replaced with
trampolines in nosnap builds) would become unreachable. Since read-only space
is not GCed and ReadOnlyHeapIterator doesn't check for reachability,
ValidateSnapshot would fail finding unreachable objects returned by
ReadOnlyHeapIterator.

Because trampoline relocation info gets replaced with canonical one, this only
affects no-embdded-builtins nosnap builds, which don't get much benefit from
read-only relocation info anyway.

A new check has been added to the read-only deserializer to verify that every
read-only object is reachable at mksnapshot-time.

The CombinedHeapIterator iteration order was changed to iterate over
read-only space first, because that's how HeapIterator worked.

This is a reland of 3d1d8eae

Original change's description:
> [heap] Skip ro-space from heap iterators, add CombinedHeapIterator.
>
> Read-only space sharing requires an iterator independent of heap. This
> also enables future removal of read-only space from heap.
>
> Bug: v8:7464
> Change-Id: Ia07a9369494ea2c547d12c01ffa1d7b8b6bbeabc
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1552795
> Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#60819}

Bug: v8:7464
Change-Id: I49ae070955b77956962334a84f762ab29052d5ff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1566513Reviewed-by: 's avatarDan Elphick <delphick@chromium.org>
Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
Cr-Commit-Position: refs/heads/master@{#61185}
      9c062093
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