Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Add lock around uv_unref during init #51236

Merged
merged 2 commits into from
Sep 9, 2023
Merged

Add lock around uv_unref during init #51236

merged 2 commits into from
Sep 9, 2023

Conversation

gbaraldi
Copy link
Member

@gbaraldi gbaraldi commented Sep 7, 2023

This is not a legal operation outside the lock because it's not atomic

@vchuravy
Copy link
Member

vchuravy commented Sep 7, 2023

As observed in real-life.

old value = 2
New value = 0
uv_unref (handle=0x6ca690) at src/uv-common.c:601
601     in src/uv-common.c
(gdb) bt
#0  uv_unref (handle=0x6ca690) at src/uv-common.c:601
#1  0x0000ffffd4d4f3a8 in uv_unref () at libuv.jl:106
#2  julia___init___85844 () at Base.jl:603
#3  0x0000ffffd4d4f658 in jfptr___init___85845 ()

This is watching jl_io_loop->active_handles and we observe a jump from 2=>0 which later causes the value to underflow.

@vchuravy vchuravy added io Involving the I/O subsystem: libuv, read, write, etc. multithreading Base.Threads and related functionality backport 1.9 Change should be backported to release-1.9 backport 1.10 Change should be backported to the 1.10 release labels Sep 7, 2023
@vtjnash
Copy link
Member

vtjnash commented Sep 7, 2023

Oh, fun. But this means this is in the wrong place still, if it needs to be part of Base.uv_unref

@vchuravy vchuravy merged commit bbbcc4f into master Sep 9, 2023
1 check passed
@vchuravy vchuravy deleted the gb/more-fixes branch September 9, 2023 20:43
KristofferC pushed a commit that referenced this pull request Sep 15, 2023
This is not a legal operation outside the lock because it's not atomic

Co-authored-by: Valentin Churavy <[email protected]>
(cherry picked from commit bbbcc4f)
KristofferC added a commit that referenced this pull request Oct 2, 2023
Backported PRs:
- [x] #48625 <!-- add replace(io, str, patterns...) -->
- [x] #48387 <!-- Improve documentation of sort-related functions -->
- [x] #48363 <!-- Revise sort.md and docstrings in sort.jl -->
- [x] #48977 <!-- Update SparseArrays.jl stdlib for SuiteSparse 7 -->
- [x] #50719 <!-- fix `CyclePadding(::DataType)` -->
- [x] #50694 <!-- inference: permit recursive type traits -->
- [x] #50860 <!-- Add `Base.get_extension` to docs/API -->
- [x] #50594 <!-- Disallow non-index Integer types in isassigned -->
- [x] #50802 <!-- Makes IntrusiveLinkedListSynchronized mutable to avoid
allocation on poptask -->
- [x] #50858 <!-- Add a `threadpool` parameter to `Channel` constructor
-->
- [x] #50874 <!-- Restrict COFF to a single thread when symbol count is
high -->
- [x] #50822 <!-- Add default method for setmodifiers! -->
- [x] #50730 <!-- Fix integer overflow in `isapprox` -->
- [x] #50850 <!-- Remove weird Rational dispatch and add pi functions to
list -->
- [x] #50809 <!-- Limit type-printing in MethodError -->
- [x] #50915 <!-- Add note the `Task` about sticky bit -->
- [x] #50929 <!-- when widening tuple types in tmerge, only widen the
complex parts -->
- [x] #50928 <!-- Bump JuliaSyntax to 0.4.6 -->
- [x] #50959 <!-- Update libssh2 patches -->
- [x] #50823 <!-- Make ranges more robust with unsigned indexes. -->
- [x] #48542 <!-- Add docs on task-specific buffering using
multithreading -->
- [x] #50912 <!-- Separate foreign threads into a :foreign threadpool
-->
- [x] #51010 <!-- Add ORIGIN to SuiteSparse rpath on Linux/FreeBSD -->
- [x] #50753 <!-- cat: remove unused promote_eltype methods that confuse
inference -->
- [x] #51027 <!-- Implement realloc accounting correctly -->
- [x] #51019 <!-- fix a case of potentially use of undefined variable
when handling error in distributed message processing -->
- [x] #51039 <!-- Revert "Optimize findall(f, ::AbstractArray{Bool})
(#42202)" -->
- [x] #51036 <!-- add missing invoke edge for nospecialize targets -->
- [x] #51042 <!-- inference: fix return_type_tfunc modeling of concrete
functions -->
- [x] #51114 <!-- Workaround upstream FreeBSD issue #272992 -->
- [x] #50892 <!-- Add `JL_DLLIMPORT` to `small_typeof` declaration -->
- [x] #51154 <!-- broadcast: use recursion rather than ntuple to map
over a tuple -->
- [x] #51153 <!-- fix debug typo in "add missing invoke edge for
nospecialize targets (#51036)" -->
- [x] #51222 <!-- Check again if the tty is open inside the IO lock -->
- [x] #51236 <!-- Add lock around uv_unref during init -->
- [x] #51243 <!-- GMP: Gracefully handle more overflows. -->
- [x] #51254 <!-- Ryu: make sure adding zeros does not overwrite
trailing dot -->
- [x] #51175 <!-- shorten stale_age for cachefile lock -->
- [x] #51300 <!-- fix method definition error for bad vararg -->
- [x] #51307 <!-- fix force-throw ctrl-C on Windows -->
- [x] #51303 <!-- ensure revising structs is safe -->
- [x] #51393 
- [x] #51403 

Need manual backport:
- [x] #51009 <!-- fix #50562, regression in `in` of tuple of Symbols -->
- [x] #51053 <!-- Bump Statistics stdlib -->
- [x] #51013 <!-- fix #50709, type bound error due to free typevar in
sparam env -->
- [x] #51305 <!-- reduce test time for rounding and floatfuncs -->

Contains multiple commits, manual intervention needed:
- [ ] #50663 <!-- Fix Expr(:loopinfo) codegen -->
- [ ] #51035 <!-- refactor GC scanning code to reflect jl_binding_t are
now first class -->
- [ ] #51092 <!-- inference: fix bad effects for recursion -->
- [x] #51247 <!-- Check if malloc has succeeded before incrementing gc
stats -->
- [x] #51294 <!-- use LibGit2_jll for LibGit2 library -->

Non-merged PRs with backport label:
- [ ] #51132 <!-- Handle `AbstractQ` in concatenation -->
- [x] #51029 <!-- testdefs: make sure that if a test set changes the
active project, they change it back when they're done -->
- [ ] #50919 <!-- Code loading: do the "skipping mtime check for stdlib"
check regardless of the value of `ispath(f)` -->
- [ ] #50824 <!-- Add some aliasing warnings to docstrings for mutating
functions -->
- [x] #50385 <!-- Precompile pidlocks: add to NEWS and docs -->
- [ ] #49805 <!-- Limit TimeType subtraction to AbstractDateTime -->
@KristofferC KristofferC removed the backport 1.10 Change should be backported to the 1.10 release label Oct 2, 2023
nalimilan pushed a commit that referenced this pull request Nov 5, 2023
This is not a legal operation outside the lock because it's not atomic

Co-authored-by: Valentin Churavy <[email protected]>
(cherry picked from commit bbbcc4f)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
backport 1.9 Change should be backported to release-1.9 io Involving the I/O subsystem: libuv, read, write, etc. multithreading Base.Threads and related functionality
Projects
None yet
Development

Successfully merging this pull request may close these issues.

4 participants