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* sverk/hamt-overestimate/OTP-12585:
erts: Add test map_SUITE:t_hashmap_balance
erts: Fix hashmap overestimation
erts: Silence valgrind warning in nif_SUITE.c
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* sverk/dec_term-bin-overhead/OTP-12554:
erts: Add missing binary offheap overhead in binary_to_term
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Old overestimation assumed an average of k/3 nodes.
This can be bad for large maps (with tight standard deviations)
as the average vary between 0.3*k and up to almost 0.4*k.
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Hmm, seems like gcc (4.4.3 at least) can switch the order
of an &&-expression and do the last condition first if it
think it's more efficient (and without side effects I hope).
Which led to valgrind complaining about 'prev_ret' being used
uninitialized in this case.
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* egil/maps/hamt/OTP-12585: (113 commits)
erts: Fix bug in ESTACK and WSTACK
kernel: Add spec for erts_debug:map_info/1
mnesia: Update mnesia tests to reflect new ETS hash
erts: Ensure maps uses _rel functions in halfword
erts: Do not treat errors as fatal in erl_printf_term
erts: Update preloaded erts_internal.beam
erts: Add map decomposition wrappers
erts: Ensure halfword has correct temp-heap for maps
hipe: Handle separate hashmap tag correctly
erts: Fix map bug in dec_term for 32-bit debug VM
stdlib: Update qlc tests to reflect new ETS hash
stdlib: Remove obsolete hashmap references in io_lib
erts: Enhance maps ordering tests
hipe: Fix maps sort order testcase
erts: Remove unused variable in crashdump creation
erts: Fix typo in copy_struct for halfword emulator
erts: Restrict GCC intrinsics by compiler version
erts: Fix windows bug in hashmap_info
erts: Fix typo in make_hash2 for 32-bit arch
Fix beam_load assert
...
Conflicts:
erts/emulator/beam/bif.tab
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The [ew]default field would get uninitialised when the stack was
saved and later restored.
Detected by valgrind.
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* erts_internal:map_type/1
* erts_internal:map_hashmap_children/1
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Adding ERTS_SWORD_MAX to a pointer does not work
as a way to disable a bound check.
Remove the hp_end from ErtsHeapFactory as it isn't really used anyway.
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* essen/zlib-export-types:
Export useful types from zlib module
OTP-12584
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* egil/fix-beam_load-assert:
erts: Fix beam_load assert
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* nlmills/cleanup:
Remove unused time macros from efile_drv
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* wmalik/minor-fixes:
Fix proc_lib doc
Remove commented out code
Fix make_hash description
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* maint:
Make access to control_flags safe in non-smp emulator
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* rickard/port_control_flags_crash/OTP-12544:
Make access to control_flags safe in non-smp emulator
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* maint:
Fix missing quotation in LM_FIND_EMU_CC
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* rickard/find_emu_cc/OTP-12388:
Fix missing quotation in LM_FIND_EMU_CC
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* essen/zlib-windowbits:
Update zlib:zwindowbits/0 type to accept 8 and -8
OTP-12564
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* nox/ets-update_counter-4:
Create new BIF ets:update_counter/4
Allow 4-ary BIFs
OTP-12563
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* nlmills/docfix:
Correct typo in erlang(3) documentation
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All uses of these macros were removed in
commit c3a615aa2da09bc3a0575e973959f800460a63de.
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Intrinsics __builtin_clz and __builtin_popcount are only valid on
GCC version 3.4 and above.
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undefined symbol 'MAX'
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Use small limit 3 in debug case
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to allow mixing of 'next' and 'prev' operations.
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This commit introduces two BIFs:
* erts_internal:map_type/1
* erts_internal:map_hashmap_children/1
erts_internal:map_hashmap_children/1 is only intended for use within
erts_debug:size/1 since the internal hashmap node is not allowed to
leak anywhere.
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as shorthand for is_flatmap || is_hashmap
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flatmap: Small map
hashmap: Large map
map: flatmap or hashmap
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Strategy: Calculate an over estimation of heap size that will give
such a low probability for overflow, that "it will not happen".
Scary assumption 1: Uniformly distributed hash values.
Scary assumption 2: Tree size is normally distributed (right?)
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