Mercurial > hg
view tests/test-merge7.t @ 43658:0796e266d26b
dirs: resolve fuzzer OOM situation by disallowing deep directory hierarchies
It seems like 2048 directories ought to be enough for any reasonable
use of Mercurial?
A previous version of this patch scanned for slashes before any allocations
occurred. That approach is slower than this in the happy path, but much faster
than this in the case that too many slashes are encountered. We may want to
revisit it in the future using memchr() so it'll be well-optimized by the libc
we're using.
.. bc:
Mercurial will now defend against OOMs by refusing to operate on
paths with 2048 or more components. This means that _extremely_
deep path hierarchies will be rejected, but we anticipate nobody
is using hierarchies this deep.
Differential Revision: https://phab.mercurial-scm.org/D7411
author | Augie Fackler <augie@google.com> |
---|---|
date | Tue, 12 Nov 2019 10:17:59 -0500 |
parents | 91a0bc50b288 |
children | 69429972ff1f |
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initial $ hg init test-a $ cd test-a $ cat >test.txt <<"EOF" > 1 > 2 > 3 > EOF $ hg add test.txt $ hg commit -m "Initial" clone $ cd .. $ hg clone test-a test-b updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved change test-a $ cd test-a $ cat >test.txt <<"EOF" > one > two > three > EOF $ hg commit -m "Numbers as words" change test-b $ cd ../test-b $ cat >test.txt <<"EOF" > 1 > 2.5 > 3 > EOF $ hg commit -m "2 -> 2.5" now pull and merge from test-a $ hg pull ../test-a pulling from ../test-a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 96b70246a118 (run 'hg heads' to see heads, 'hg merge' to merge) $ hg merge merging test.txt warning: conflicts while merging test.txt! (edit, then use 'hg resolve --mark') 0 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] resolve conflict $ cat >test.txt <<"EOF" > one > two-point-five > three > EOF $ rm -f *.orig $ hg resolve -m test.txt (no more unresolved files) $ hg commit -m "Merge 1" change test-a again $ cd ../test-a $ cat >test.txt <<"EOF" > one > two-point-one > three > EOF $ hg commit -m "two -> two-point-one" pull and merge from test-a again $ cd ../test-b $ hg pull ../test-a pulling from ../test-a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 40d11a4173a8 (run 'hg heads' to see heads, 'hg merge' to merge) $ hg merge --debug resolving manifests branchmerge: True, force: False, partial: False ancestor: 96b70246a118, local: 50c3a7e29886+, remote: 40d11a4173a8 preserving test.txt for resolve of test.txt starting 4 threads for background file closing (?) test.txt: versions differ -> m (premerge) picked tool ':merge' for test.txt (binary False symlink False changedelete False) merging test.txt my test.txt@50c3a7e29886+ other test.txt@40d11a4173a8 ancestor test.txt@96b70246a118 test.txt: versions differ -> m (merge) picked tool ':merge' for test.txt (binary False symlink False changedelete False) my test.txt@50c3a7e29886+ other test.txt@40d11a4173a8 ancestor test.txt@96b70246a118 warning: conflicts while merging test.txt! (edit, then use 'hg resolve --mark') 0 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] $ cat test.txt one <<<<<<< working copy: 50c3a7e29886 - test: Merge 1 two-point-five ======= two-point-one >>>>>>> merge rev: 40d11a4173a8 - test: two -> two-point-one three $ hg debugindex test.txt rev linkrev nodeid p1 p2 0 0 01365c4cca56 000000000000 000000000000 1 1 7b013192566a 01365c4cca56 000000000000 2 2 8fe46a3eb557 01365c4cca56 000000000000 3 3 fc3148072371 7b013192566a 8fe46a3eb557 4 4 d40249267ae3 8fe46a3eb557 000000000000 $ hg log changeset: 4:40d11a4173a8 tag: tip parent: 2:96b70246a118 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: two -> two-point-one changeset: 3:50c3a7e29886 parent: 1:d1e159716d41 parent: 2:96b70246a118 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Merge 1 changeset: 2:96b70246a118 parent: 0:b1832b9d912a user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Numbers as words changeset: 1:d1e159716d41 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: 2 -> 2.5 changeset: 0:b1832b9d912a user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Initial $ cd ..