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The code has been rearranged to make use of the actual path
"get_default_emulator(scriptname)" to the escript instead of
the given one "get_default_emulator(argv[0])".
TL;DR
Assume a source system with some Erlang applications (app1, app2 etc.)
and an escript called "mytool". When generating a standalone target
system (with reltool for example), the escript(s) are located in the
same top bin directory as "erl". See mytool* below.
In such a system the original "mytool" escript is given the extension
".escript" and the file with the same name as the original escript is
a copy of the "escript" executable. One purpose of the escript
executable is to determine which "erl" to use to start the system.
In a standalone system we want it to find the runtime system bundled
with the escript(s). This is done by analyzing the path in order to
find the "erl" located in the same directory as the escript.
A dilemma here is that we do not want to put the top bin directory
in the execution path (PATH env var) as we then would cause other
Erlang applications to make use of our bundled run-time system.
One way of solving this is to choose some suitable bin directory in
the execution path (such as /user/local/bin) and put a symbolic link
there to our mytool executable.
Unfortunately this did not work as the escript executable (in this
case called mytool) would try to find "erl" in /usr/local/bin and when
it did not find such a file it resorted to use the command "erl" which
would find some (unwanted) "erl" in the execution path.
My fix solves that problem.
├── bin/
│ ├── erl* (dyn_erl.c)
│ ├── mytool* (escript.c)
│ ├── mytool.escript* (original mytool escript)
│ └── start_clean.boot
├── erts-vsn/
│ └── bin/
│ ├── beam*
│ ├── beam.smp*
│ ├── erl*
│ ├── erl_child_setup*
│ ├── erlexec*
│ └── inet_gethost*
└── lib/
├── app1-vsn
├── app2-vsn
└── ...
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Hardware watchdog support was removed from heart in R13A, but there were
still some vestiges in the code and the documentation.
- Remove mentions of the HW_WD_DISABLE variable, as it's no longer used.
- Remove the HEART_BEAT_BOOT_DELAY variable, as it was only used for the
hardware watchdog.
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* dotsimon/erts/heart_no_kill/OTP-13650:
erts: Fix HEART_NO_KILL logic
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* dotsimon/erts/heart_no_kill/OTP-13650:
erts: make HEART_NO_KILL have to be set to TRUE
Don't kill old erlang if HEART_NO_KILL is set
Conflicts:
lib/kernel/doc/src/heart.xml
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If the environment variable HEART_NO_KILL is set then
heart won't kill the old erlang process. This is desirable
if the command executed by heart takes care of this.
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Add a command line option that lets you disable automatic starting of
epmd when starting a distributed node.
This differs from the undocumented setting -no_epmd, in that it does
not affect the starting of an erl_epmd process within
erl_distribution: the newly started node will expect an epmd instance
to have been started previously.
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* rickard/ds-proc-exit/OTP-13123:
Add dirty_heap_access test case
Add dirty_call_while_terminated test case
Move dirty nif test cases into dirty_nif_SUITE
Add better support for communication with a process executing dirty NIF
Remove conditional dirty schedulers API
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The max_heap_size process flag can be used to limit the
growth of a process heap by killing it before it becomes
too large to handle. It is possible to set the maximum
using the `erl +hmax` option, `system_flag(max_heap_size, ...)`,
`spawn_opt(Fun, [{max_heap_size, ...}])` and
`process_flag(max_heap_size, ...)`.
It is possible to configure the behaviour of the process
when the maximum heap size is reached. The process may be
sent an untrappable exit signal with reason kill and/or
send an error_logger message with details on the process
state. A new trace event called gc_max_heap_size is
also triggered for the garbage_collection trace flag
when the heap grows larger than the configured size.
If kill and error_logger are disabled, it is still
possible to see that the maximum has been reached by
doing garbage collection tracing on the process.
The heap size is defined as the sum of the heap memory
that the process is currently using. This includes
all generational heaps, the stack, any messages that
are considered to be part of the heap and any extra
memory the garbage collector may need during collection.
In the current implementation this means that when a process
is set using on_heap message queue data mode, the messages
that are in the internal message queue are counted towards
this value. For off_heap, only matched messages count towards
the size of the heap. For mixed, it depends on race conditions
within the VM whether a message is part of the heap or not.
Below is an example run of the new behaviour:
Eshell V8.0 (abort with ^G)
1> f(P),P = spawn_opt(fun() -> receive ok -> ok end end, [{max_heap_size, 512}]).
<0.60.0>
2> erlang:trace(P, true, [garbage_collection, procs]).
1
3> [P ! lists:duplicate(M,M) || M <- lists:seq(1,15)],ok.
ok
4>
=ERROR REPORT==== 26-Apr-2016::16:25:10 ===
Process: <0.60.0>
Context: maximum heap size reached
Max heap size: 512
Total heap size: 723
Kill: true
Error Logger: true
GC Info: [{old_heap_block_size,0},
{heap_block_size,609},
{mbuf_size,145},
{recent_size,0},
{stack_size,9},
{old_heap_size,0},
{heap_size,211},
{bin_vheap_size,0},
{bin_vheap_block_size,46422},
{bin_old_vheap_size,0},
{bin_old_vheap_block_size,46422}]
flush().
Shell got {trace,<0.60.0>,gc_start,
[{old_heap_block_size,0},
{heap_block_size,233},
{mbuf_size,145},
{recent_size,0},
{stack_size,9},
{old_heap_size,0},
{heap_size,211},
{bin_vheap_size,0},
{bin_vheap_block_size,46422},
{bin_old_vheap_size,0},
{bin_old_vheap_block_size,46422}]}
Shell got {trace,<0.60.0>,gc_max_heap_size,
[{old_heap_block_size,0},
{heap_block_size,609},
{mbuf_size,145},
{recent_size,0},
{stack_size,9},
{old_heap_size,0},
{heap_size,211},
{bin_vheap_size,0},
{bin_vheap_block_size,46422},
{bin_old_vheap_size,0},
{bin_old_vheap_block_size,46422}]}
Shell got {trace,<0.60.0>,exit,killed}
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that uses its own super carrier (erts_exec_mmapper)
to guarantee low addressed and executable memory (PROT_EXEC).
Currently only used on x86_64 that needs low memory
for HiPE/AMD64's small code model.
By initializing erts_exec_mapper early we secure
its low memory area before erts_literal_mmapper might
steal it.
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* henrik/update-copyrightyear:
update copyright-year
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* msantos/erts/cli-abort-on-alloc-fail/PR-948/OTP-13486:
erts/common: check for OOM on Windows
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* sverk/literal-alloc-polish:
erts: Add emulator flag +MIscs for literal super carrier size
erts: Refactor init of erts_literal_mmapper
erts: Make literal_alloc documented and configurable
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Conflicts:
erts/emulator/beam/erl_alloc.types
erts/emulator/beam/erl_bif_info.c
erts/emulator/beam/erl_process.c
erts/preloaded/ebin/erts_internal.beam
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Except it cannot be disabled and cannot be multi-threaded.
The bit-vector 'erts_literal_vspace_map' on 32-bit is currently only
protected by the literal allocator mutex. We could allow multiple
instances on 64-bit (I think), but what would be the point?
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Fix the command line tools to abort on allocation failures when run
on Windows. Modify the malloc() wrapper to consistently return void*
across all the tools.
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Conflicts:
OTP_VERSION
erts/vsn.mk
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This reverts commit 731890f3b4ac62eed1221aa7d9fd2bfa6bf51d8c.
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* rickard/ohmq-fixup/OTP-13047:
Replace off_heap_message_queue option with message_queue_data option
Always use literal_alloc
Distinguish between GC disabled by BIFs and other disabled GC
Fix process_info(_, off_heap_message_queue)
Off heap message queue test suite
Remove unused variable
Fix memory leaks
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The message_queue_data option can have the values
- off_heap
- on_heap
- mixed
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OTP-13147
* sverk/cpool_fetch-dc_list-fix:
erts: Reduce alloc_SUITE:rbtree runtime for valgrind
erts: Remove double free in efile_drv
erts: Improve alloc_SUITE:migration test
erts: Pass free mem and build type to alloc_SUITE tests
erts: Fix snprintf in alloc_SUITE for windows
erts: Workaround for strange crash on win64 in alloc_SUITE test code
erts: Refactor alloc_SUITE to use NIFs instead of drivers
erts: Add enif_getenv
erts: Make key argument constant for erl_drv_{get|put}env
erts: Add alloc_SUITE:migration
erts: Add TEST allocator
erts: Fix confusion of callbacks destroying_mbc() vs remove_mbc()
erts: Fix resurrection of carriers from dc_list
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* legoscia/heart-remove-obsolete-comment:
Remove obsolete comment in heart.c
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* evnu/fix-whitespace-splitting:
Fix erroneous splitting of emulator path
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* legoscia/erl-make-exit-code:
Make erl -make return non-zero exit code on failure
OTP-13107
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* The youngest generation of the heap can now consist of multiple
blocks. Heap fragments and message fragments are added to the
youngest generation when needed without triggering a GC. After
a GC the youngest generation is contained in one single block.
* The off_heap_message_queue process flag has been added. When
enabled all message data in the queue is kept off heap. When
a message is selected from the queue, the message fragment (or
heap fragment) containing the actual message is attached to the
youngest generation. Messages stored off heap is not part of GC.
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The "if" referred to in the comment was removed in commit 70c9312c4b.
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This makes it behave like similar Unix tools.
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`ct_run.c`, `erlc.c`, `escript.c` and `typer.c` do not preserve space characters in the emulator
path. Thus, if a path containing space is passed via environment variables, such as
`ESCRIPT_EMULATOR`, or if `get_default_emulator(progname)` returns a path with space, the execution
of the programs fail. This patch fixes all occurrences found with `grep push_words -R $ERL_TOP`.
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The OSE port is no longer supported and this commit removed it
and any changes related to it. The things that were general
improvements have been left in the code.
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* rickard/+zebwt/OTP-12830:
ETS busy wait option
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Conflicts:
erts/emulator/beam/erl_init.c
erts/etc/common/erlexec.c
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* rickard/delayed-delete-node/OTP-12802:
Delayed node table GC
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* richcarl/warnings-by-default/OTP-12781:
stdlib: Use warning channel in test qlc_SUITE:otp_6964/1
stdlib: Fix testcase for qlc_SUITE
kernel: Fix code_SUITE with respect to new logger default
Map error logger warnings to warning messages by default
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Also fix and document the broken +We option.
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This reverts commit 4c4d7fa40e5fb59854724ce74b8aa3546525cb90.
This pr is causing some test failures that were missed at first.
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