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This commit fixes a bug that could cause a crash or memory usage to
grow until the machine ran out of memory when adding a key-value pair
to a map. This could happen when inserting a new key-value pair with a
key K1 containing a binary B1 into a map M having a key K2 with a
binary B2 if the following conditions were met:
* size(B1) >= 4294967296
* size(B2) >= 4294967296
* size(M) >= 32
* (size(B1) rem 4294967296) == (size(B2) rem 4294967296)
* the first (size(B1) rem 4294967296) bytes are the same both in B1
and B2
* substituting B1 in K1 with B2 would result in a term with the same
value as K2
The root cause of the bug is that the map implementation only hashed
the first (X modulo 4294967296) bytes of binaries so that different
binaries could get hashed to the same hash value independently of the
hash seed.
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tty: document ^] keystroke
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* john/erts/remove-destructive-bs_get_binary2/ERL-901:
erts: Remove unsafe bs_get_binary2 optimization from loader
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A load-time optimization assumed that match contexts had no further
uses when a bs_get_binary2 overwrote the match context's register,
and figured it would be safe to reuse the match context's memory
for the resulting binary.
This is no longer safe as of OTP 22, as a match context may be
reused after being passed to another function.
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* john/erts/seq_trace-sigq-clearing/OTP-15704:
erts: Handle all signal types when clearing seq_trace token
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We walk through all signal queues in the system when clearing
seq_trace, so we must be prepared to encounter all kinds of
signals.
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Fix the unsafe load-time optimization introduced in 07bdbb3a1edc.
https://bugs.erlang.org/browse/ERL-899
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* john/erts/explain-empty-stack-check-in-next_catch:
erts: Add an explanation for the empty stack check in next_catch
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This reverts commit 0118046f9bda8dcf3594184fa439b79267db8017.
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* sverker/bug-fixing:
erts: Fix erts_debug:set_internal_state(reds_left)
erts: Fix binary_SUITE:cmp_old_impl
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to avoid failed ERTS_DBG_CHK_REDS by clearing virtual_reds.
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since DFLAG_BIG_CREATION became mandatory in
321dc6ee0241f802c940def174c0a77262e11f21.
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'lukas/erts/fragment-dist-messages/OTP-13397/OTP-15610/OTP-15611/OTP-15612/OTP-15613/OTP-15703'
* lukas/erts/fragment-dist-messages/OTP-13397/OTP-15610/OTP-15611/OTP-15612/OTP-15613/OTP-15703: (26 commits)
erts: Yield when exiting/free process is suspended by de
doc: Fix Design Princ, statem incorrect anchor
erts: Include external msg in need of GC
erts: Include dist header in return from dist_ctrl_get_data
erts: Fix so that exit/down terms stay alive
erts: Pending signals can be for free processes
erts: Fix faulty assert in reference_table_term
etp: Don't crash etp-stack* when c_p->i is null
erts: Adjust dist obuf size correctly after hdr fin
erts: Fix non-payload dist exit signals
erts: Always do trylock on proc locks when crash dumping
Fix tests to work better in debug emulator
erts: erts_factory_proc_init should not set hole marker
erts: Skip heavy process tab tests in debug emu
ts: Use same dynlinking logic for all bsd
Revert "erts: Always run fds check after each testcase"
erts: Always run fds check after each testcase
erts: Always stop any testnodes before testcase exits
erts: Add crash dumping of EXITING and FREE processes
wx: Remove ERL_FLAGS from Makefile erlc command
...
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When many external messages suddenly appear in the mailbox
the young gen size is adjusted accordingly but it was
immediately shrunk as the data was not counted towards the
shrink size. This commit includes the ext dist size in the
shrink calculation which means that the decode of the external
messages will not trigger as many GCs which means much better
performance.
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When the GC is run or the link/monitor node is deleted,
the terms associated with it will also be deallocated
so we have to make sure that we don't do any GCs and that
all link/monitor nodes are copied onto the heap before
the node is deallocated.
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Since we no schedule free processes multiple times, pending
signals can be from free as well as current processes.
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When interacting with jinterface and erl_interface
the old dist messages are used and they incorrectly
used the external data.
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Setting the hole marker in debug on the entire heap is very slow
so instead we do it in erts_produce_heap.
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This reverts commit 1eb0a2c47edd036731ee1e4e4f7b5bdfc7d576fa.
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This needs to be done in order for automatic fd leak checking
to work properly.
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When the calling process is trapping exits a stray message
will end up in the mailbox which is problematic. This change
uses a monitor instead.
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This makes it possible to do:
make release TYPE=debug
from ERL_TOP and it will build the correct things.
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This reverts commit f4c121b1d98bf3db7e6eecbb9fb5b292f2bc3bb0.
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* sverker/enable-big-creation/OTP-15603:
epmd: Support 32-bit creation values in local node
erts: Robustify epmd reply function
erts: Reject decoded local refs with too large first word
erts: Fix bug in list_to_ref
erl_interface: Remove old encoding of pid,port,refs
erts: Remove old encoding of pids, ports and refs
erts: Make DFLAG_BIG_CREATION mandatory
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* Increase distribution version from 5 to 6
* Introduce new ALIVE2_X_RESP with 32-bit creation
as reply to ALIVE2_REQ when sender dist version >= 6
* Still reply old ALIVE2_RESP with tiny creation 1..3
if sender dist version < 6.
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First word must be less than (1 bsl 18) for local refs.
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This commit suppresses the following warning in gcc 4.8.2:
In file included from beam/bif.c:33:0:
beam/bif.c: In function ‘iolist_size_1’:
beam/bif.h:332:14: warning: ‘state_mref’ may be used uninitialized in this function [-Wmaybe-uninitialized]
reg[0] = (A0); \
^
beam/bif.c:2464:11: note: ‘state_mref’ was declared here
Eterm state_mref;
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Before 2d2e78ad6e66 that introduced tail-recursive calls of BIFs, the
stack was guaranteed not to be empty when `erlang:raise/3` was called
from the `catch` block of a `try` (because the `try` had set up a
stack frame that would be deallocated after the `raise` call).
Now the stack can be empty, so the ASSERT() call in next_catch()
that checks that there is a continuation pointer at the top of
the stack may fail.
Move the ASSERT() call to after check for empty stack.
While at it, also add a comment of the reason for the assertion.
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* john/erts/fix-badarg-fixed_apply:
erts: Include argument list on badarg in fixed_apply
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* john/erts/unc-path-size-fix/OTP-15693:
erts: Fix incorrect UNC path length calculation
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This didn't cause any issues for the most part since the path was
still properly formed, but it broke down when appending the
wildcards in file:list_dir/1. The ASSERT_PATH_FORMAT macro would
have caught this in no time, but it went unnoticed because we don't
run debug builds on Windows.
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* sverker/master/enif_whereis_pid-dirty-dtor:
erts: Add test of enif_whereis* from resource destructor
erts: Simplify nif_SUITE:nif_whereis* tests
erts: Schedule resource destructors always
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