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This version does not work great as the subtrees
created are not proper hash maps. Also it is not
all that performant as the extra allocations to
keep the stack there is expensive.
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(Slightly) optimize catch and try/catch
OTP-14683
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Explicitly disable HiPE's range analysis
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* lukas/erts/use_SIGRTMIN_for_sys_suspend/OTP-14682:
erts: Use SIGRTMIN on linux for sys_suspend
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The Linux real-time signal is better used on Linux
for suspending schedulers during shutdown as it doesn't
collide with SIGUSR2 usage of other applications.
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* lukas/erts/poll-thread/OTP-14346:
erts: Make a copy of erl_poll.c to help debuggers
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* rickard/null-chars/ERL-370/OTP-14543:
Don't allow null chars in various strings
Conflicts:
erts/emulator/beam/erl_alloc.types
erts/preloaded/ebin/erlang.beam
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* maint:
Revert "Merge branch 'rickard/null-char-filenames/ERL-370/OTP-14543' into maint"
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This reverts commit 0717a2194e863f3a78595184ccc5637697f03353, reversing
changes made to 71a40658a0cef8b3e25df3a8e48a72d0563a89bf.
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Conflicts:
erts/emulator/beam/beam_bp.c
erts/emulator/beam/erl_process.c
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* lukas/erts/tracing/recv_exit_signal_deadlock/OTP-14678:
erts: Fix lock order when recv tracing trapped exit signal
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* lukas/erts/fix_caller_trace_for_apply_bifs/OTP-14677:
erts: Fix caller trace for apply bifs
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Various places that now reject null chars inside strings
- Primitive file operations reject it in filenames.
- Primitive environment variable operations reject it in
names and values.
- os:cmd() reject it in its input.
Also '=' characters are rejected by primitive environment
variable operations in environment variable names.
Documentation has been updated to document null characters
in these types of data as invalid. Currently these operations
accept null chars at the end of strings, but that will change
in the future.
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when/if compiling this file to native code to check its exception
behaiour. Related to the discussion in #1586.
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The try_end and try_case instructions are implemented the same way
(try_case is translated to try_end by the loader).
We can do better than that. We know that try_case will only be executed
when an exception has been caught. Therefore, we know that x(0) is
the non-value and that x(1) through x(3) need to be shifted down to
x(0) through x(2). There is no need to test x(0) before shifting down.
try_end does not need the register shifting code at all.
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Especially lldb seems to get very confused when the
same source file is used by two different object files.
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Bifs that are called through the export entry
using i_call_last could have their cp set to
return_trace, just like any other call. So we
have to unwind the trace stack to get the correct
cp. Not doing this creates a lot of issues for
fprof.
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OTP-14327
OTP-14340
* bjorn/erts/pack-with-opcode/OTP-14325:
Pack operands for combined instructions into the instruction word
beam_makeops: Use named arguments for the code generation functions
Optimize packing for "optional use" operands
beam_makeops: Print the instruction name for fatal packing errors
Introduce a syntax for marking operands as "optional use"
beam_makeops: Refactor parsing of specific instructions
Optimize instruction prefetch
Pack operands into the instruction word
Use 32-bits pointers to C code
Move LD flags for hipe from Makefile.in to configure.in
beam_disasm: Correct printing of y registers
ops.tab: Slightly optimize badmatch on a Y register
macros.tab: Fix assertion in SET_I_REL()
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The operands for the first part of a combined instruction (the entry
point following the OpCase() label) can safely be packed into the
instruction word.
This commit will make each of the following instructions one word
shorter:
bs_context_to_binary_x
i_band_xcjtd
i_bs_get_binary_all_reuse_xft
i_bs_get_integer_imm_xWtftx
i_bs_get_integer_small_imm_xWftx
i_bs_init_bits_fail_xjtx
i_bs_init_bits_fail_yjtx
i_bs_init_bits_fail_heap_sIjtx
i_bs_init_bits_heap_WItx
i_bs_init_fail_xjtx
i_bs_init_fail_yjtx
i_bs_init_fail_heap_sIjtx
i_bs_init_heap_WItx
i_bs_start_match2_xfttx
i_bs_start_match2_yfttx
i_element_xjsd
i_element_yjsd
i_fast_element_xjId
i_fast_element_yjId
i_increment_xWtd
i_increment_yWtd
i_jump_on_val_xfIW
i_jump_on_val_yfIW
i_jump_on_val_zero_xfI
i_jump_on_val_zero_yfI
i_minus_xxjtd
i_plus_xxjtd
i_plus_xyjtd
i_put_tuple_xI
i_put_tuple_yI
i_rem_xxjtd
i_select_tuple_arity_xfI
i_select_tuple_arity_yfI
i_select_tuple_arity2_xfAA
i_select_tuple_arity2_yfAA
i_select_val2_xfcc
i_select_val2_yfcc
i_select_val_bins_xfI
i_select_val_bins_yfI
i_select_val_lins_xfI
i_select_val_lins_yfI
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The number of arguments has become unwieldy.
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* lukas/erts/beam-emu-vars:
erts: Add makefile target to check emu register allocation
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Operands that are marked with a "?" are not always used when
an instruction is executed. Enhance the packing algorithm to
place optional use operands into the instruction word even they
are not the first operand (as long as the total instruction
size stays the same).
Here are the instructions that will be packed differently
because of this change:
allocate_heap t I t?
allocate_heap_zero t I t?
test_heap I t?
i_bs_get_integer_8 x f? x
i_bs_get_integer_16 x f? x
i_bs_get_integer_32 x f? x
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Having the instruction name available in the functions
that implement packing also simplifies debugging.
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Introduce a syntax to mark an operand that is not always used when
an instrution is executed. Example of such operands are the fail
label for is_nil or the number of live registers for an
allocate instruction.
Use a question mark to annotate optional use:
is_nil f? xy
allocate t t?
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On 64-bit machines where the C code is always at address below 4Gb,
pack one or more operands into the instruction word.
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On a 64-bit machine, we only need 32 bits to store a pointer to
the C code that implements a BEAM instruction. Refactor the code
to only use the lower 32 bits of each instruction word, and take
care to preserve the high 32 bits.
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We want the flags to be available for other tests in configure.in.
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9a50a5d5fc1 changed the update of I, but forgot to update
the preceding assertion.
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We can't just leave it in queue with dist_ext=NULL.
Two symptoms seen:
1. 'receive' trying to deref dist_ext as NULL.
2. GC think it's a term and put THE_NON_VALUE in root set.
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* bjorn/erts/improve-beam-ops:
Move out variables from the head of combined instructions
Change operand from 'P' to 'Q' for i_apply_last and i_apply_fun_last
Add CHECK_ALIGNED() for testing storage destinations
instrs.tab: Add missing -no_next directives
beam_load.c: Generalize the 'P' operator in the packing engine
Break out most of the initialization from process_main()
Eliminate the OpCode() macro
Eliminate unnecessary and inconsistent casts
Refactor macros for accessing Beam instructions
beam_emu: Make order of macros consistent
beam_SUITE: Strengthen test of packed registers
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Point out the correct line number in stack traces
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* maint:
Don't allow null in filenames
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* lukas/erts/poll-thread/OTP-14346: (25 commits)
erts: Trigger ready events when erts_io_control fails
erts: enif_select steal test
kernel: Rewrite gen_udp_SUITE:read_packet tc
erts: disable kernel-poll on OS X vsn < 16
erts: Fix msacc testcase with new poll-thread
erts: Add testcases to test IOp and IOt options
erts: get_internal_state(check_io_debug) now prints to error_logger
erts: Remove eager check io
erts: Move all I/O polling to a seperate thread
erts: Fix smp_select testcase to use ERL_DRV_USE
erts: Fix msacc unmanaged state counter
erts: Optimize port_task quick allocator
erts: Add ERTS_THR_PREF_QUICK_ALLOC_IMPL
erts: Update suspend of scheduler to handle multiple pollsets
erts: Add multiple poll sets
erts: Some code cleanup for gdb to work better
erts: temp_alloc can no longer be disabled
erts: Refactor check_io to use one static struct
erts: Replace check_io spinlock with lock-less list insertion
erts: Add number of enif_select's to check_io_debug
...
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kqueue is broken on earlier versions of OS X.
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