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2019-08-06erts_debug: Turn off unsafe optimizations in test caseJohn Högberg
The test case alters the return value of a function that the compiler expects will never return, resulting in undefined behavior. Note that the debugger (which may change variables/return values) is unaffected since the affected module is purged and "replaced" with an interpreted variant.
2019-06-12Add lc_graph in the allowed arguments of get_internal_state/1Kostis Sagonas
The code contains a call to the erts_debug:get_internal_state/1 BIF with an atom that is not specified in the allowed arguments of this BIF.
2019-04-08Add erts_debug:interpreter_size/0Björn Gustavsson
Add erts_debug:interpreter_size/0 for retrieving the approximate size of the BEAM interpreter (process_main()).
2018-06-28Remove ad-hoc memory use calculations in testsJohn Högberg
2018-04-13erts: Add erts_debug:lc_graph/0Sverker Eriksson
Run debug VM or config with --enable-lock-checking. Exercise VM and then run erts_debug:lc_graph(). to create a file "lc_graph.<pid>" in current working directory.
2018-03-21Implementation of true asynchronous signaling between processesRickard Green
Communication between Erlang processes has conceptually always been performed through asynchronous signaling. The runtime system implementation has however previously preformed most operation synchronously. In a system with only one true thread of execution, this is not problematic (often the opposite). In a system with multiple threads of execution (as current runtime system implementation with SMP support) it becomes problematic. This since it often involves locking of structures when updating them which in turn cause resource contention. Utilizing true asynchronous communication often avoids these resource contention issues. The case that triggered this change was contention on the link lock due to frequent updates of the monitor trees during communication with a frequently used server. The signal order delivery guarantees of the language makes it hard to change the implementation of only some signals to use true asynchronous signaling. Therefore the implementations of (almost) all signals have been changed. Currently the following signals have been implemented as true asynchronous signals: - Message signals - Exit signals - Monitor signals - Demonitor signals - Monitor triggered signals (DOWN, CHANGE, etc) - Link signals - Unlink signals - Group leader signals All of the above already defined as asynchronous signals in the language. The implementation of messages signals was quite asynchronous to begin with, but had quite strict delivery constraints due to the ordering guarantees of signals between a pair of processes. The previously used message queue partitioned into two halves has been replaced by a more general signal queue partitioned into three parts that service all kinds of signals. More details regarding the signal queue can be found in comments in the erl_proc_sig_queue.h file. The monitor and link implementations have also been completely replaced in order to fit the new asynchronous signaling implementation as good as possible. More details regarding the new monitor and link implementations can be found in the erl_monitor_link.h file.
2017-11-22Fix broken to_dis after merge from maint to masterBjörn Gustavsson
d8d07a7593d811 that added the to_dis option to the compiler no longer works when merged to master. That is because of 79f28cfd8df1b7 that removed some unused code in erts_debug. Fix this by adding a new function erts_debug:dis_to_file/2 and use it from compile module where we have access to the filename (in beam_listing we only have an opened file).
2017-11-20Merge branch 'maint'Lukas Larsson
Conflicts: lib/compiler/src/beam_listing.erl
2017-11-20compiler: Add +to_dis option that dumps loaded asmLukas Larsson
2017-09-22Speed up erts_debug:df()Björn Gustavsson
The test case erts_debug_SUITE:df/1 in the emulator test suite is about 4 times faster with this change.
2017-07-06Break erts_debug:lock_counters/1 into separate BIFsJohn Högberg
2017-01-12Support for dirty BIFsRickard Green
2016-03-15update copyright-yearHenrik Nord
2015-12-07erts: Change erts_internal:map_type/1 into term_type/1Sverker Eriksson
to support other terms, not just maps
2015-11-17Add machinery to enable SHCOPY dynamicallyNikolaos S. Papaspyrou
This commit is just for debugging purposes, will probably be reverted. It comes with a the erts_debug:copy_shared/1 BIF. If SHCOPY_DISABLE is defined, SHCOPY starts disabled and is dynamically enabled the first time that the BIF is called.
2015-11-17Add the BIF size_shared/1 and debug cleanupNikolaos S. Papaspyrou
2015-06-18Change license text to APLv2Bruce Yinhe
2015-04-23kernel: Add instruction_count helper to erts_debugBjörn-Egil Dahlberg
2015-03-19kernel: Add spec for erts_debug:map_info/1Björn-Egil Dahlberg
2015-03-12erts, kernel: Fix erts_debug:size/1 for hashmapsBjörn-Egil Dahlberg
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.
2014-04-30kernel: Fix erts_debug:size/1 to handle Map sizesBjörn-Egil Dahlberg
2013-05-06Fix unmatched_returns warnings in STDLIB and KernelHans Bolinder
2012-03-20Merge branch 'maint'Björn Gustavsson
* maint: Improve erts_debug_SUITE Fix calculation of fun size in erts_debug:size/1
2012-03-19Fix calculation of fun size in erts_debug:size/1Björn Gustavsson
Funs would be calculated using erts_debug:flat_size/1.
2012-01-27Move types and specs from erl_bif_types.erl to modulesHans Bolinder
2009-11-20The R13B03 release.OTP_R13B03Erlang/OTP