libdtrace: Generalize handling of data models a bit

Make it easier to support data models other than ILP32 and LP64 by
avoiding constructs which assume that it must be one or the other.

No function

libdtrace: Generalize handling of data models a bit

Make it easier to support data models other than ILP32 and LP64 by
avoiding constructs which assume that it must be one or the other.

No functional change intended.

MFC after: 2 weeks
Sponsored by: Innovate UK

show more ...

dtrace: Add the 'oformat' libdtrace option

This option can be used to specify a format to use in DTrace output.
The following formats are supported:
- json
- xml
- html
- none (default DTrace ou

dtrace: Add the 'oformat' libdtrace option

This option can be used to specify a format to use in DTrace output.
The following formats are supported:
- json
- xml
- html
- none (default DTrace output)

This is implemented using libxo and integrated into libdtrace. Client
code only works with the following API:

- dtrace_oformat_setup(dtrace_hdl_t *) -- to be called when output is starting.
- dtrace_oformat_teardown(dtrace_hdl_t *) -- to be called when output is finished
- dtrace_oformat(dtrace_hdl_t *) -- check if oformat is enabled.
- dtrace_set_outfp(FILE *) -- sets the output file for oformat.
- Ensure that oformat is correctly checked in the drop handler and record
processing callbacks.

This commit also adds tests which check if the generated output is
valid (JSON, XML) and extends the dtrace(1) describing the structured output.

Reviewed by: markj
Discussed with: phil
MFC after: 2 months
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D41745

show more ...

dtrace(1): add -d flag to dump D script post-dt_sugar

By specifying the -d flag, libdtrace will dump the D script after it has
applied syntactical sugar transformations (e.g if/else). This is useful

dtrace(1): add -d flag to dump D script post-dt_sugar

By specifying the -d flag, libdtrace will dump the D script after it has
applied syntactical sugar transformations (e.g if/else). This is useful
for both understanding what dt_sugar does, as well as debugging it.

Reviewed by: markj
Approved by: markj (mentor)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D38732

show more ...

dtrace: honor LC_NUMERIC for %'d and alike, and LC_TIME for %T

Note that the public documentation on dtrace.org fails to mention %T and
incorrectly documents %Y. The latter actually uses format "%Y

dtrace: honor LC_NUMERIC for %'d and alike, and LC_TIME for %T

Note that the public documentation on dtrace.org fails to mention %T and
incorrectly documents %Y. The latter actually uses format "%Y %b %e %T"
where %b is always in C locale.

Discussed with: markj
MFC after: 1 month
Sponsored by: Panzura

show more ...

Fix inconsistencies in anonymous DOF files.

The DOF file output by dtrace -A contains only the loadable sections.
However, as it was created by a call to dtrace_dof_create() without
flags, the origi

Fix inconsistencies in anonymous DOF files.

The DOF file output by dtrace -A contains only the loadable sections.
However, as it was created by a call to dtrace_dof_create() without
flags, the original DOF was created with the loadable sections. The
result is that the DOF includes the section headers for the unloadable
sections (COMMENTS and UTSNAME) without these sections actually being
present. This is inconsistent.

A simple change to anon_prog() ensures that the missing sections are
present in the outputted DOF. Alternatively, the call to
dtrace_dof_create() could pass the DTRACE_D_STRIP flag stripping out the
loadable sections. As the unloadable sections contain info useful for
debugging purposes they haven't been stripped.

Submitted by: Graeme Jenkinson <graeme.jenkinson@cl.cam.ac.uk>
MFC after: 1 week
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D21875

show more ...

MFhead @ r304815

Merge ^/head r304236 through r304536.

Add a SIGINFO handler for dtrace(1).

Have it print the contents of aggregations, if any. Otherwise, one needs to
kill the running script to view the collected data, or add code to
periodically print

Add a SIGINFO handler for dtrace(1).

Have it print the contents of aggregations, if any. Otherwise, one needs to
kill the running script to view the collected data, or add code to
periodically print it.

Discussed with: gnn
MFC after: 1 month

show more ...

MFH

Sponsored by: The FreeBSD Foundation

Implement support for boot-time DTrace.

This allows one to enable DTrace probes relatively early during boot,
during SI_SUB_DTRACE_ANON, before dtrace(1) can invoked. The desired
enabling is created

Implement support for boot-time DTrace.

This allows one to enable DTrace probes relatively early during boot,
during SI_SUB_DTRACE_ANON, before dtrace(1) can invoked. The desired
enabling is created using dtrace -A, which writes a /boot/dtrace.dof
file and uses nextboot(8) to ensure that DTrace kernel modules are loaded
and that the DOF file describing the enabling is loaded by loader(8)
during the subsequent boot. The trace output can then be fetched with
dtrace -a.

With this commit, boot-time DTrace is only functional on i386 and amd64: on
other architectures, the high-resolution timer frequency is initialized
during SI_SUB_CLOCKS and is thus not available when the anonymous
tracing state is initialized. On x86, the TSC is used and is thus available
earlier.

MFC after: 1 month
Relnotes: yes

show more ...

Merge sync of head

MFhead @ r277403

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Mechanically convert cddl sun #ifdef's to illumos

Since the upstream for cddl code is now illumos not sun, mechanically
convert all sun #ifdef's to illumos #ifdef's which have been used in all
newer

Mechanically convert cddl sun #ifdef's to illumos

Since the upstream for cddl code is now illumos not sun, mechanically
convert all sun #ifdef's to illumos #ifdef's which have been used in all
newer code for some time.

Also do a manual pass to correct the use if #ifdef comments as per style(9)
as well as few uses of #if defined(__FreeBSD__) vs #ifndef illumos.

MFC after: 1 month
Sponsored by: Multiplay

show more ...

Merge from head@274682

Reintegrate head@r273095

Sponsored by: The FreeBSD Foundation

Merge HEAD@r272944.

IFC @r272481

Sync to HEAD@r272516.

Have dtrace(1) handle SIGPIPE by cleaning up and exiting. Additionally,
install signal handlers when running in list mode (-l), and acknowledge
interrupts by cleaning up and exiting. This ensures tha

Have dtrace(1) handle SIGPIPE by cleaning up and exiting. Additionally,
install signal handlers when running in list mode (-l), and acknowledge
interrupts by cleaning up and exiting. This ensures that a command like

$ dtrace -l -P 'pid$target' -p <target PID> | less

won't cause the ptrace(2)d target process to be killed if less(1) exits
before all dtrace output is consumed.

Reported by: Anton Yuzhaninov <citrin+bsd@citrin.ru>
Differential Revision: https://reviews.freebsd.org/D880
Reviewed by: rpaulo
MFC after: 1 month
Sponsored by: EMC / Isilon Storage Division

show more ...

IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28

Sync to HEAD@r269943.

MFV illumos

4474 DTrace Userland CTF Support
4475 DTrace userland Keyword
4476 DTrace tests should be better citizens
4479 pid provider types
4480 dof emulation is missing checks

MFC after: 2 weeks

IFC @ r254014