kernel/linux.git/tools/testing/selftests/ftrace, branch v5.1.16

Merge tag 'trace-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2019-03-12T00:01:32+00:00

Pull tracing updates from Steven Rostedt: "The biggest change for this release is in the histogram code: - Add "onchange(var)" histogram handler that executes a action when $var changes. - Add new "snapshot()" action for histogram handlers, that causes a snapshot of the ring buffer when triggered. ie. onchange(var).snapshot() will trigger a snapshot if var changes. - Add alternative for "trace()" action. Currently, to trigger a synthetic event, the name of that event is used as the handler name, which is inconsistent with the other actions. onchange(var).synthetic(param) where it can now be onchange(var).trace(synthetic, param). The older method will still be allowed, as long as the synthetic events do not overlap with other handler names. - The histogram documentation at testcases were updated for the new changes. Outside of the histogram code, we have: - Added a quicker way to enable set_ftrace_filter files, that will make it much quicker to bisect tracing a function that shouldn't be traced and crashes the kernel. (You can echo in numbers to set_ftrace_filter, and it will select the corresponding function that is in available_filter_functions). - Some better displaying of the tracing data (and more information was added). The rest are small fixes and more clean ups to the code" * tag 'trace-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (37 commits) tracing: Use strncpy instead of memcpy when copying comm in trace.c tracing: Use strncpy instead of memcpy when copying comm for hist triggers tracing: Use strncpy instead of memcpy for string keys in hist triggers tracing: Use str_has_prefix() in synth_event_create() x86/ftrace: Fix warning and considate ftrace_jmp_replace() and ftrace_call_replace() tracing/perf: Use strndup_user() instead of buggy open-coded version doc: trace: Fix documentation for uprobe_profile tracing: Fix spelling mistake: "analagous" -> "analogous" tracing: Comment why cond_snapshot is checked outside of max_lock protection tracing: Add hist trigger action 'expected fail' test case tracing: Add alternative synthetic event trace action test case tracing: Add hist trigger onchange() handler test case tracing: Add hist trigger snapshot() action test case tracing: Add SPDX license GPL-2.0 license identifier to inter-event testcases tracing: Add alternative synthetic event trace action syntax tracing: Add hist trigger onchange() handler Documentation tracing: Add hist trigger onchange() handler tracing: Add hist trigger snapshot() action Documentation tracing: Add hist trigger snapshot() action tracing: Add conditional snapshot ...

selftests/ftrace: Handle the absence of tput

2019-02-25T14:48:01+00:00

In environments where tput is not available, we get the following error $ ./ftracetest: 163: [: Illegal number: because ncolors is an empty string. Fix that by setting it to 0 if the tput command fails. Acked-by: Steven Rostedt (VMware) Acked-by: Masami Hiramatsu Signed-off-by: Juerg Haefliger Signed-off-by: Shuah Khan

selftests/ftrace: Replace \e with \033

2019-02-22T22:43:26+00:00

The \e sequence character is not POSIX. Fix that by using \033 instead. Acked-by: Steven Rostedt (VMware) Acked-by: Masami Hiramatsu Signed-off-by: Juerg Haefliger Signed-off-by: Shuah Khan

selftests/ftrace: Replace echo -e with printf

2019-02-22T22:25:18+00:00

echo -e is not POSIX. Depending on what /bin/sh is, we can get incorrect output like: $ -e -n [1] Basic trace file check $ -e [PASS] Fix that by using printf instead. Acked-by: Steven Rostedt (VMware) Acked-by: Masami Hiramatsu Signed-off-by: Juerg Haefliger Signed-off-by: Shuah Khan

tracing: Add hist trigger action 'expected fail' test case

2019-02-20T18:51:08+00:00

Add a test case verifying that basic action combinations fail as expected. Link: http://lkml.kernel.org/r/1790bf93e01dbdfa1b4af945f42147d92bd565aa.1550100284.git.tom.zanussi@linux.intel.com Acked-by: Masami Hiramatsu Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt (VMware)

tracing: Add alternative synthetic event trace action test case

2019-02-20T18:51:07+00:00

Add a test case for the alternative trace( Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt (VMware)

tracing: Add hist trigger onchange() handler test case

2019-02-20T18:51:07+00:00

Add a test case verifying the basic functionality of the hist:onchange($var) handler. Link: http://lkml.kernel.org/r/bec87aa8ed7d81794510b3d465096a750c71fce7.1550100284.git.tom.zanussi@linux.intel.com Signed-off-by: Tom Zanussi Acked-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

tracing: Add hist trigger snapshot() action test case

2019-02-20T18:51:07+00:00

Add a test case verifying the basic functionality of the hist:snapshot() action. Link: http://lkml.kernel.org/r/c0555f462cbfe56dadfec6e63e531e109bd72930.1550100284.git.tom.zanussi@linux.intel.com Signed-off-by: Tom Zanussi Acked-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

tracing: Add SPDX license GPL-2.0 license identifier to inter-event testcases

2019-02-20T18:51:07+00:00

Apparently this directory was missed in the license cleanup process - add the missing identifiers to the trigger/inter-event test cases. Link: http://lkml.kernel.org/r/6f9828c2cfb0b378ebd217a39a1b44f063fc17fb.1550100284.git.tom.zanussi@linux.intel.com Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt (VMware)

Merge tag 'trace-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2018-12-31T19:46:59+00:00

Pull tracing updates from Steven Rostedt: - Rework of the kprobe/uprobe and synthetic events to consolidate all the dynamic event code. This will make changes in the future easier. - Partial rewrite of the function graph tracing infrastructure. This will allow for multiple users of hooking onto functions to get the callback (return) of the function. This is the ground work for having kprobes and function graph tracer using one code base. - Clean up of the histogram code that will facilitate adding more features to the histograms in the future. - Addition of str_has_prefix() and a few use cases. There currently is a similar function strstart() that is used in a few places, but only returns a bool and not a length. These instances will be removed in the future to use str_has_prefix() instead. - A few other various clean ups as well. * tag 'trace-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (57 commits) tracing: Use the return of str_has_prefix() to remove open coded numbers tracing: Have the historgram use the result of str_has_prefix() for len of prefix tracing: Use str_has_prefix() instead of using fixed sizes tracing: Use str_has_prefix() helper for histogram code string.h: Add str_has_prefix() helper function tracing: Make function ‘ftrace_exports’ static tracing: Simplify printf'ing in seq_print_sym tracing: Avoid -Wformat-nonliteral warning tracing: Merge seq_print_sym_short() and seq_print_sym_offset() tracing: Add hist trigger comments for variable-related fields tracing: Remove hist trigger synth_var_refs tracing: Use hist trigger's var_ref array to destroy var_refs tracing: Remove open-coding of hist trigger var_ref management tracing: Use var_refs[] for hist trigger reference checking tracing: Change strlen to sizeof for hist trigger static strings tracing: Remove unnecessary hist trigger struct field tracing: Fix ftrace_graph_get_ret_stack() to use task and not current seq_buf: Use size_t for len in seq_buf_puts() seq_buf: Make seq_buf_puts() null-terminate the buffer arm64: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack ...