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.
As of r278658 libproc looks for debug files under /usr/lib/debug and will
use them if available. This change fleshes out that support a bit further:
- Check for a .gnu_debuglink section and use the file name specified
there if one is present.
- Validate external debug files with the CRC in the .gnu_debuglink
section so as to avoid using stale or corrupt debug files.
- Search for debug files in the directory containing the referencing
object or in the .debug subdirectory, as GDB does.
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.
to copy. All the platforms breakpoints fits this fine.
This fixes operation on big-endian MIPS64 where we were coping
zeroes instead of real instruction.
Reviewed by: rpaulo
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential Revision: https://reviews.freebsd.org/D8250
In the normal case and correct failure cases, the 'phdl' pointer is passed to
callers to use or clean up as needed. However, some failure cases returned
early, failing to export the phdl pointer.
This was introduced in the restructuring of r303533.
Reported by: Coverity
CID: 1361070
Reviewed by: markj
Sponsored by: EMC / Isilon Storage Division
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
after r298107
Summary of changes:
- Replace all instances of FILES/TESTS with ${PACKAGE}FILES. This ensures that
namespacing is kept with FILES appropriately, and that this shouldn't need
to be repeated if the namespace changes -- only the definition of PACKAGE
needs to be changed
- Allow PACKAGE to be overridden by callers instead of forcing it to always be
`tests`. In the event we get to the point where things can be split up
enough in the base system, it would make more sense to group the tests
with the blocks they're a part of, e.g. byacc with byacc-tests, etc
- Remove PACKAGE definitions where possible, i.e. where FILES wasn't used
previously.
- Remove unnecessary TESTSPACKAGE definitions; this has been elided into
bsd.tests.mk
- Remove unnecessary BINDIRs used previously with ${PACKAGE}FILES;
${PACKAGE}FILESDIR is now automatically defined in bsd.test.mk.
- Fix installation of files under data/ subdirectories in lib/libc/tests/hash
and lib/libc/tests/net/getaddrinfo
- Remove unnecessary .include <bsd.own.mk>s (some opportunistic cleanup)
Document the proposed changes in share/examples/tests/tests/... via examples
so it's clear that ${PACKAGES}FILES is the suggested way forward in terms of
replacing FILES. share/mk/bsd.README didn't seem like the appropriate method
of communicating that info.
MFC after: never probably
X-MFC with: r298107
PR: 209114
Relnotes: yes
Tested with: buildworld, installworld, checkworld; buildworld, packageworld
Sponsored by: EMC / Isilon Storage Division
librtld_db only needs libutil.h to build, not the libproc library. So
it can safely use its header and allow libproc to depend on librtld_rb
to be built first to link. This is required after fixing ld --sysroot
in r291226.
Sponsored by: EMC / Isilon Storage Division
This both avoids some dependencies on xinstall.host and allows
bootstrapping on older releases to work due to lack of at least 'install -l'
support.
Sponsored by: EMC / Isilon Storage Division
netbsd-tests.test.mk (r289151)
- Eliminate explicit OBJTOP/SRCTOP setting
- Convert all ad hoc NetBSD test integration over to netbsd-tests.test.mk
- Remove unnecessary TESTSDIR setting
- Use SRCTOP where possible for clarity
MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Divison
adjusted. This seems to be the case on all non-x86 architectures libproc
supports.
Reviewed by: kib
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3465
Each issue has a PR open to track. This workaround allows us to run the
tests to investigate the failures and avoid any new regressions.
PR: 202304, 202305, 202307
Reviewed by: ngie
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3378
Off by default, build behaves normally.
WITH_META_MODE we get auto objdir creation, the ability to
start build from anywhere in the tree.
Still need to add real targets under targets/ to build packages.
Differential Revision: D2796
Reviewed by: brooks imp
modifications to libproc to support fetching the CTF info for a given file.
With this change, dtrace(1) is able to resolve type info for function and
USDT probe arguments, and function return values. In particular, the args[n]
syntax should now work for referencing arguments of userland probes,
provided that the requisite CTF info is available.
The uctf tests pass if the test programs are compiled with CTF info. The
current infrastructure around the DTrace test suite doesn't support this
yet.
Differential Revision: https://reviews.freebsd.org/D891
MFC after: 1 month
Relnotes: yes
Sponsored by: EMC / Isilon Storage Division
erroneously skip symbols that were not mangled at all. Fix this by
moving the return into the preceding if block.
While here, simplify the code by letting __cxa_demangle() allocate the
needed space for the demangled symbol. This also fixes a memory leak,
which would occur whenever __cxa_demangle() failed.
Reported by: pgj
MFC after: 3 days
and finish the job. ncurses is now the only Makefile in the tree that
uses it since it wasn't a simple mechanical change, and will be
addressed in a future commit.
process if it has not already been stopped, since this is required for
ptrace(2) to work.
libdtrace does not seem to stop target processes before trying to remove
their breakpoints, so we were previously failing to remove the breakpoint
on r_debug_state() in rtld. This was causing processes to die with SIGTRAP
if they called dlopen(3) after dtrace(1) had detached.
Reported by: symbolics@gmx.com
Reviewed by: rpaulo
MFC after: 1 month
* 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.
array of loaded objects to avoid a buffer overrun.
- Use reallocf() to avoid leaking memory if the realloc() fails.
PR: kern/175648
Submitted by: yuri@rawbw.com (1)
MFC after: 1 week
observed with -O2 (used by default).
Avoid function inlining for t1_bkpt_t on which we set a breakpoint.
Otherwise the address of the function is never called thus the
breakpoint never triggers.
Reported by: zont
Reviewed by: rpaulo
There is one known issue: Some probes will display an error message along the
lines of: "Invalid address (0)"
I tested this with both a simple dtrace probe and dtruss on a few different
binaries on 32-bit. I only compiled 64-bit, did not run it, but I don't expect
problems without the modules loaded. Volunteers are welcome.
MFC after: 1 month
proc_attach always frees any struct proc_handle data
that it allocates, but that is supposed to be done
only in error conditions.
PR: bin/158431
Approved by: re (kib)
MFC after: 1 week
o return the correct status in proc_wstatus()
o proc_read takes a void *
o correctly allocate the objs structure array
Sponsored by: The FreeBSD Foundation
* 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
Similar to libexec/, do the same with lib/. Make WARNS=6 the norm and
lower it when needed.
I'm setting WARNS?=0 for secure/. It seems secure/ includes the
Makefile.inc provided by lib/. I'm not going to touch that directory.
Most of the code there is contributed anyway.
preparation for 8.0-RELEASE. Add the previous version of those
libraries to ObsoleteFiles.inc and bump __FreeBSD_Version.
Reviewed by: kib
Approved by: re (rwatson)
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.
