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shrink_to_fit with vector tends to cause high memory peak.
Changing deque is a simple change that reduces memory peak at the cost of
loss of guarantee (contiguous storage).
Similar to https://chromium-review.googlesource.com/c/chromium/src/+/2830864
which dramatically reduced crach rate
https://crash.corp.google.com/browse?q=product_name%3D%27Chrome%27+AND+EXISTS+%28SELECT+1+FROM+UNNEST%28CrashedStackTrace.StackFrame%29+WHERE+FunctionName%3D%27installer%3A%3AArchivePatchHelper%3A%3AZucchiniEnsemblePatch%27%29+AND+expanded_custom_data.ChromeCrashProto.magic_signature_1.name%3D%27%5BOut+of+Memory%5D+zucchini%3A%3ADisassemblerWin32%3Czucchini%3A%3AWin32X64Traits%3E%3A%3AParseAndStoreRel32%27
An alternative is to look ahead to determine vector size. The is hard to do
with SortAndUniquify, which performs in-place modifications.
Bug: 1247633
Change-Id: I624c360ee1f2bf18bd584d1aafdde0f0c2ffb61e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3149810
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Reviewed-by: Samuel Huang <huangs@chromium.org>
Cr-Commit-Position: refs/heads/main@{#921292}
NOKEYCHECK=True
GitOrigin-RevId: 380557e6b592531eb360513791968dd7ab0ee77d
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Fix compile error with -Wshorten-64-to-32. Image size is new stored as an
offset_t to avoid implicit conversion.
Bug: 881008
Change-Id: I82b12ce17d8368f05d6a5537fd1734ee32b37dbe
Reviewed-on: https://chromium-review.googlesource.com/1213549
Reviewed-by: Samuel Huang <huangs@chromium.org>
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589938}
NOKEYCHECK=True
GitOrigin-RevId: 5946dbfa3f684d8f4960bb413b5e8322ebddcee3
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Forward-projection is how Zucchini uses the equivalence map to create
estimated "new" targets from "old" targets. Extended forward-projection
is defined to transform non-covered offsets: Given an offset, it finds
the equivalence unit with nearest "old" block, then applies the
"old"-to-"new" displacement to the offset. However, this makes it
possible to map an "old" offset to an offset outside "new" image.
Another issue is that Zucchini uses "dangling targets" that use "fake
offsets" outside the image file to represent .bss data. These targets
also undergo forward-projection, and should be properly handled.
This CL fixes the existing behavior, where underflow / overflow go
unchecked (although these values are rendered benign downstream, since
the nearest actual "new" target is found). The updated extended
forward-projection specifies:
- For "old" targets with real offsets: Take nearest equivalence unit,
clamp output to be inside [0, "new" image size).
- For "old" dangling targets with fake offsets: Use difference in
file size as displacement.
The main impact w.r.t. patch is to reduce possible variance in patch
sizes -- dangling targets are now handled better. Extensive unit tests
are also added.
Bug: 832572
Change-Id: I41fea175e4c13585d14a97a712a191afc2fcc6d6
Reviewed-on: https://chromium-review.googlesource.com/1111467
Reviewed-by: Samuel Huang <huangs@chromium.org>
Reviewed-by: Greg Thompson <grt@chromium.org>
Commit-Queue: Samuel Huang <huangs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570401}
NOKEYCHECK=True
GitOrigin-RevId: ad7a5c086f00de62997714b84d6d6b5817ccc9d8
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This CL deletes Label Manager sources and unittests since it is not used
anymore.
Bug: 729154
Change-Id: Ic8e9cc8dbebd4317d53c0b48ac683b44de99593b
Reviewed-on: https://chromium-review.googlesource.com/967051
Reviewed-by: Samuel Huang <huangs@chromium.org>
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544016}
NOKEYCHECK=True
GitOrigin-RevId: bdbf3919914f79fb3c6a941d458e9cbd22d7056a
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(Use "git log --follow" to see older revisions of files).
/components/ is the most logical place to put Zucchini, which only
depends on /base and /testing/gtest. This move also enables Zucchini to
be used by the Component Updater. Details:
- Move all files; run the following to change deps and guards:
sed 's/chrome\/installer/components/' *.cc *.h -i
sed 's/CHROME_INSTALLER/COMPONENTS/' *.cc *.h -i
- Sorting works out pretty well!
- Change all 'chrome/installer/zucchini' to 'components/zucchini'
throughout other parts of the repo; sort if necessary.
- Fix 6 'git cl lint' errors.
- Change 1 Bind() usage to BindRepeated().
- Update OWNER.
Bug: 729154
Change-Id: I50c5a7d411ea85f707b5994ab319dfb2a1acccf7
Reviewed-on: https://chromium-review.googlesource.com/954923
Reviewed-by: Greg Thompson <grt@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Samuel Huang <huangs@chromium.org>
Commit-Queue: Samuel Huang <huangs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542857}
NOKEYCHECK=True
GitOrigin-RevId: 577ef6c435e8d43be6e3e60ccbcbd1881780f4ec
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