Commit Graph

14 Commits

Author SHA1 Message Date
Pedro F. Giffuni
5e53a4f90f lib: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-26 02:00:33 +00:00
Mark Johnston
2c73c414eb Avoid keeping a dangling pointer when the mappings array is resized.
Sponsored by:	Dell EMC Isilon
2017-09-06 16:24:34 +00:00
Mark Johnston
c156354ff8 libproc: Cache symbol tables for mapped objects upon access.
Extend the file handle cache entries to include symbol tables as well. An
index is used to implement binary search by symbol value. Lookups by
name are comparatively rare and are thus still implemented with a linear
search, but support for a binary search by name would be straightforward
to add if needed.
2016-12-06 04:21:35 +00:00
Mark Johnston
07a9c2e65d libproc: Cache ELF handles for loaded objects.
libproc previously created a new handle for each symbol lookup, which
gives rather egregious performance for DTrace's ustack() action. With
this change libproc will cache the libelf descriptor upon access, making
lookups much faster in the common case.
2016-12-06 04:19:08 +00:00
Mark Johnston
b1bb30e5c5 libproc: Make proc_getpid() an accessor for struct proc_handle.
This allows librtld_db to fetch the PID from a handle without calling into
libproc. Together with r303531, this means that librtld_db no longer
references symbols from libproc.
2016-12-06 04:14:20 +00:00
Mark Johnston
fcf9fc109e Fix style bugs and remove trailing whitespace in libproc and librtld_db.
MFC after:	1 week
2016-12-06 04:13:02 +00:00
Mark Johnston
4808a67805 libproc: Add proc_getmodel().
This is used by libdtrace to determine the data model of target processes.
This allows for the creation of pid provider probes in 32-bit processes on
amd64.

MFC after:	1 month
2016-07-30 03:09:23 +00:00
Mark Johnston
700244a246 Add descriptions for fields in struct proc_handle.
Remove the unused kq field and some unnecessary includes.

MFC after:	1 month
2016-07-30 03:07:14 +00:00
Mark Johnston
acc0eea6b0 Allow "a.out" as an alias for the executable if no other matching entries
are found. This improves compatibility with Solaris' libproc and fixes a
number of failing DTrace tests that rely on this feature.

MFC after:	3 weeks
2014-05-03 04:44:03 +00:00
Mark Johnston
fb15925c14 Revert r257248 and fix the problem in a way that doesn't violate style(9).
Suggested by:	jmg
2013-10-29 03:12:31 +00:00
Mark Johnston
30e81f7e3b Clean up the debug printing in libproc a bit. In particular:
* Don't print any error messages to stderr unless DEBUG is defined.
* Add a DPRINTFX macro for use when errno isn't set.
* Print the error string from libelf when appropriate.
2013-10-27 20:39:10 +00:00
Mark Johnston
25aecfbb23 Fix the libproc build when DEBUG is defined. 2013-10-17 03:39:21 +00:00
Rui Paulo
8eb20f364f New version of libproc. Changes are:
* breakpoint setup support
* register query
* symbol to address mapping and vice-versa
* more misc utility functions based on their Solaris counterpart

Also, I've written some test cases.

Sponsored by:	The FreeBSD Foundation
2010-07-31 16:10:20 +00:00
John Birrell
2c633af461 Add a process library with some stubs that the DTrace client needs.
These will be fleshed out as part of the DTrace userland tracing
development.

For now, the kernel tracing part of DTrace requires minimal functionality
for this library.

The API for this library is deliberately different from the libproc in
OpenSolaris due to licensing restrictions.
2008-05-22 02:09:21 +00:00