Commit Graph

388 Commits

Author SHA1 Message Date
Thomas Munro
bb24ee2b7e truss: Add AIO syscalls.
Display the arguments of aio_read(2), aio_write(2), aio_suspend(2),
aio_error(2), aio_return(2), aio_cancel(2), aio_fsync(2), aio_mlock(2),
aio_waitcomplete(2) and lio_listio(2) in human-readable form.

Reviewed by:	asomers
Differential Revision:	https://reviews.freebsd.org/D27518
2020-12-10 07:13:15 +00:00
Kyle Evans
c2679dd779 kdump/truss: decode new _umtx_op flags
In both cases, print the flag bits first followed by the command.

Output now looks something like this:

(ktrace)
_umtx_op(0x8605f7008,0xf<UMTX_OP_WAIT_UINT_PRIVATE>,0,0,0)
_umtx_op(0x9fffdce8,0x80000003<UMTX_OP__32BIT|UMTX_OP_WAKE>,0x1,0,0)

(truss)
_umtx_op(0x7fffffffda50,UMTX_OP_WAKE,0x1,0x0,0x0) = 0 (0x0)
_umtx_op(0x9fffdd08,UMTX_OP__32BIT|UMTX_OP_WAKE,0x1,0x0,0x0) = 0 (0x0)

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D27325
2020-12-09 03:24:09 +00:00
Ryan Moeller
92e17803cd Enable iterating all sysctls, even ones with CTLFLAG_SKIP
Add an "nextnoskip" sysctl that allows for listing of sysctls intended to be
normally skipped for cost reasons.

This makes it so the names/descriptions of those sysctls can be discovered with
sysctl -aN/sysctl -ad/sysctl -at.

It also makes it so children are visited when a node flagged with CTLFLAG_SKIP
is explicitly requested.

The intended use case is to mark the root "kstat" node with CTLFLAG_SKIP so that
the extensive and expensive stats are skipped by default but may still be easily
obtained without having to know them all (which may not even be possible) and
request each one-by-one.

Reviewed by:	jhb
MFC after:	2 weeks
Relnotes:	yes
Sponsored by:	iXsystems, Inc.
Differential Revision:	https://reviews.freebsd.org/D26560
2020-10-05 20:13:22 +00:00
Pawel Biernacki
43ec732a2c truss: print more information about traced sysctls
MFC after:	2 weeks
Sponsored by:	Mysterious Code Ltd.
2020-07-05 19:53:54 +00:00
Christian S.J. Peron
7be2c6f3bf Decode the file descriptor argument to closefrom(2) as an Integer.
This is consistent with what we are doing for close(2) and it makes
it a bit easier to follow when debugging file descriptor operations.
i.e. many other syscalls are decoding fds as integers rather than
base 16 numbers.

MFC after:	1 week
2020-05-21 02:10:45 +00:00
Mateusz Guzik
0573d0a9b8 vfs: add realpathat syscall
realpath(3) is used a lot e.g., by clang and is a major source of getcwd
and fstatat calls. This can be done more efficiently in the kernel.

This works by performing a regular lookup while saving the name and found
parent directory. If the terminal vnode is a directory we can resolve it using
usual means. Otherwise we can use the name saved by lookup and resolve the
parent.

See the review for sample syscall counts.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D23574
2020-02-20 16:58:19 +00:00
Kyle Evans
733ba7eff6 truss: fix shm_open2 oversight (BinString -> Name)
BinString assumes a length in the next argument; Name is more appropriate
for the final argument.
2020-02-19 15:12:01 +00:00
Kyle Evans
bcca34259c truss: decode shm_open2
shm_open2 is similar to shm_open, except it also takes shmflags and optional
name to label the anonymous region for, e.g., debugging purposes.

The appropriate support for decoding shmflags was added to libsysdecode in
r358115.

This is a part of D23733.

Reviewed by:	kaktus
2020-02-19 14:54:33 +00:00
Ed Maste
5aa0576b33 Miscellaneous typo fixes
Submitted by:	Gordon Bergling <gbergling_gmail.com>
Differential Revision:	https://reviews.freebsd.org/D23453
2020-02-07 19:53:07 +00:00
Brooks Davis
cc86d14a47 truss: centralize pointer-constructing casts.
In nearly all cases, the caller has a uintptr_t compatible argument so
this eliminates a large number of casts.

Add a print_pointer function to centralize printing pointers.

Reviewed by:	jhb
Obtained from:	CheriBSD
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D22212
2019-10-31 22:29:13 +00:00
John Baldwin
214b76700c Fix a typo in a comment. 2019-10-03 18:12:34 +00:00
David Bright
9afb12bab4 Add an shm_rename syscall
Add an atomic shm rename operation, similar in spirit to a file
rename. Atomically unlink an shm from a source path and link it to a
destination path. If an existing shm is linked at the destination
path, unlink it as part of the same atomic operation. The caller needs
the same permissions as shm_unlink to the shm being renamed, and the
same permissions for the shm at the destination which is being
unlinked, if it exists. If those fail, EACCES is returned, as with the
other shm_* syscalls.

truss support is included; audit support will come later.

This commit includes only the implementation; the sysent-generated
bits will come in a follow-on commit.

Submitted by:	Matthew Bryan <matthew.bryan@isilon.com>
Reviewed by:	jilles (earlier revision)
Reviewed by:	brueffer (manpages, earlier revision)
Relnotes:	yes
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D21423
2019-09-26 15:32:28 +00:00
Konstantin Belousov
43ce0d902c truss: decode sysctl names.
Submitted by:	Pawel Biernacki
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D21688
2019-09-18 16:15:05 +00:00
John Baldwin
caa449b635 Use PT_GET_SC_ARGS and PT_GET_SC_RET in truss.
This removes all of the architecture-specific functions from truss.

A per-ABI structure is still needed to map syscall numbers to names
and FreeBSD errno values to ABI error values as well as hold syscall
counters.  However, the linker set of ABI structures is now replaced
with a simple table mapping ABI names to structures.  This approach
permits sharing the same ABI structure among separate names such as
i386 a.out and ELF binaries as well as ELF v1 vs ELF v2 for powerpc64.

A few differences are visible due to using PT_GET_SC_RET to fetch the
error value of a system call.  Note that ktrace/kdump have had the
"new" behaviors for a long time already:
- System calls that return with EJUSTRETURN or ERESTART will now be
  noticed and logged as such.  Previously sigreturn (which uses
  EJUSTRETURN) would report whatever random value was in the register
  holding errno from the previous system call for example.  Now it
  reports EJUSTRETURN.
- System calls that return errno as their error value such as
  posix_fallocate() and posix_fadvise() now report non-zero return
  values as errors instead of success with a non-zero return value.

Reviewed by:	kib
MFC after:	1 month
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D20963
2019-07-16 22:59:15 +00:00
Thomas Munro
b5eab9d461 truss: Add support for fsync(2) and fdatasync(2).
The default handling showed the argument as hex.  Add explicit handling so
we can show it as decimal, since that's how we show file descriptors
everywhere else.

Approved by:	mjg (mentor)
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D19295
2019-02-28 09:13:41 +00:00
John Baldwin
c1745bf503 Validate the string size parameter passed to -s.
Use strtonum() to reject negative sizes instead of core dumping.

PR:		232206
Submitted by:	David Carlier <devnexen@gmail.com>
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D17537
2018-12-10 21:47:19 +00:00
John Baldwin
dab45de671 Rename riscv64-freebsd.c to riscv-freebsd.c.
This fixes truss when built as part of a riscv64sf world.  Additionally,
if FreeBSD ever supports RV32 RISC-V most of this file can be used as-is
just as a single file is used for all of the MIPS ABIs.

Sponsored by:	DARPA
2018-12-06 22:35:07 +00:00
Justin Hibbits
59dc8c79c6 Allow truss to operate on ELFv2 processes.
Summary:
Currently, truss doesn't work on ELFv2 processes due to not recognizing the ABI.

Since there's no special handling needed here, just adding a PROCABI struct for
it is sufficient to get it working.

Submitted by:	git_bdragon.rtk0.net
Differential Revision: https://reviews.freebsd.org/D18352
2018-11-29 03:57:06 +00:00
Thomas Munro
5b05dc5a8b truss: Fix display of shm_open(SHM_ANON, ...).
Currently truss(1) shows shm_open(SHM_ANON, ...) as shm_open("(null)", ...).
Detect the special value and display it by name.

Reviewed by:    jhb, allanjude, tuexen
Approved by:    mjg (mentor)
MFC with:       r339224
Differential Revision:  https://reviews.freebsd.org/D17461
2018-10-28 10:59:49 +00:00
Allan Jude
24eeedb5e9 Teach truss how to display shm_open(2), shm_unlink(2)
Submitted by:	Thomas Munro <munro@ip9.org>
Reviewed by:	tuexen, kib
Approved by:	re (rgrimes)
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D17457
2018-10-07 19:50:44 +00:00
Alan Somers
6040822c4e Make timespecadd(3) and friends public
The timespecadd(3) family of macros were imported from NetBSD back in
r35029. However, they were initially guarded by #ifdef _KERNEL. In the
meantime, we have grown at least 28 syscalls that use timespecs in some
way, leading many programs both inside and outside of the base system to
redefine those macros. It's better just to make the definitions public.

Our kernel currently defines two-argument versions of timespecadd and
timespecsub.  NetBSD, OpenBSD, and FreeDesktop.org's libbsd, however, define
three-argument versions.  Solaris also defines a three-argument version, but
only in its kernel.  This revision changes our definition to match the
common three-argument version.

Bump _FreeBSD_version due to the breaking KPI change.

Discussed with:	cem, jilles, ian, bde
Differential Revision:	https://reviews.freebsd.org/D14725
2018-07-30 15:46:40 +00:00
John Baldwin
c830069674 Reformat the enum of syscall argument types.
List enum values on separate lines to minimize diffs as new types are
added.  Split the enum values up into groups and use some simple sorting
within groups (scalar enums are sorted by size, then base, all other
groups are generally sorted alphabetically).

No functional change.
2018-03-29 00:12:50 +00:00
John Baldwin
eee0738944 Rename ClouduABIFDSFlags to CloudABIFDSFlags. 2018-03-29 00:04:07 +00:00
Conrad Meyer
e9ac27430c Implement getrandom(2) and getentropy(3)
The general idea here is to provide userspace programs with well-defined
sources of entropy, in a fashion that doesn't require opening a new file
descriptor (ulimits) or accessing paths (/dev/urandom may be restricted
by chroot or capsicum).

getrandom(2) is the more general API, and comes from the Linux world.
Since our urandom and random devices are identical, the GRND_RANDOM flag
is ignored.

getentropy(3) is added as a compatibility shim for the OpenBSD API.

truss(1) support is included.

Tests for both system calls are provided.  Coverage is believed to be at
least as comprehensive as LTP getrandom(2) test coverage.  Additionally,
instructions for running the LTP tests directly against FreeBSD are provided
in the "Test Plan" section of the Differential revision linked below.  (They
pass, of course.)

PR:		194204
Reported by:	David CARLIER <david.carlier AT hardenedbsd.org>
Discussed with:	cperciva, delphij, jhb, markj
Relnotes:	maybe
Differential Revision:	https://reviews.freebsd.org/D14500
2018-03-21 01:15:45 +00:00
Michael Tuexen
b8ff144e19 Add missing assignment to make sure non-first cmsgs are handled as such. 2018-01-17 10:30:49 +00:00
Michael Tuexen
6accaf4a90 Improve the printing of cmgs when the length is 0. Fix error handling. 2018-01-16 20:02:07 +00:00
Michael Tuexen
3193be242b Using %p already prints "0x", so don't do it explicitly. 2018-01-16 19:57:30 +00:00
John Baldwin
76785d6ea5 Rename 'recv' to 'receive' to appease shadow warnings from GCC. 2018-01-16 01:21:07 +00:00
Michael Tuexen
097b25a780 Keep list sorted. Thanks to jhb@ to pointing out that I put it at the
wrong place in r327919.
2018-01-15 23:17:12 +00:00
Michael Tuexen
a2674e031c Decode msghdr argument of sendmsg() and recvmsg().
Sponsored by:		Netflix, Inc.
2018-01-15 20:39:42 +00:00
Michael Tuexen
4d7b980924 Improve support for sctp_generic_recvmsg() and sctp_generic_sendmsg()
and add support for sctp_generic_sendmsg_iov().

Handle the struct iovec argument and the struct sctp_sndrcvinfo
arguments.
2018-01-14 14:33:22 +00:00
Michael Tuexen
dfcd2888aa Mark the iovec parameters of writev() and readv() as IN and OUT.
This makes truss work on readv() as expected.
2018-01-14 09:51:25 +00:00
Michael Tuexen
7b7a6b7351 Fix a typo introduced in r327919. 2018-01-13 14:10:45 +00:00
Michael Tuexen
ee6e58b26e Add support for readv() and writev() to truss.
Sponsored by:	Netflix, Inc.
2018-01-13 13:59:35 +00:00
Ed Schouten
4be29fb3c5 Make truss work for CloudABI executables on i386.
The system call convention is different from i386 binaries running on
FreeBSD/amd64, but this is not noticeable by executables. On
FreeBSD/amd64, the vDSO already does padding of arguments and return
values to 64-bit values. On i386, it does not, meaning that system call
return values are simply stored in registers.
2017-12-21 09:21:40 +00:00
Ed Schouten
d0aec74836 Make truss(8) work for 32-bit CloudABI executables on ARM64.
This change effectively merges the existing 64-bit support for ARM64
with the 32-on-64-bit support for AMD64.
2017-12-20 13:13:10 +00:00
Ed Schouten
ae8ef112ad Make truss(8) work for i686-unknown-cloudabi binaries on FreeBSD/amd64.
This change copies the existing amd64_cloudabi64.c to amd64_cloudabi32.c
and reimplements the functions for fetching system call arguments and
return values to use the same scheme as used by the vDSO that is used
when running cloudabi32 executables.

As arguments are automatically padded to 64-bit words by the vDSO in
userspace, we can copy the arguments directly into the array used by
truss(8) internally.

Reviewed by:	jhb
Differential Revision:	https://reviews.freebsd.org/D13516
2017-12-16 19:40:28 +00:00
John Baldwin
9d9fee3eed Replace a reference to a license in another file with the license text.
The relevant file was recently renamed, so the reference was stale.
In addition, explicit licenses are more typical in our sources.
2017-11-29 05:07:54 +00:00
Pedro F. Giffuni
1de7b4b805 various: general adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified 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.

No functional change intended.
2017-11-27 15:37:16 +00:00
John Baldwin
ffb6607984 Decode kevent structures logged via ktrace(2) in kdump.
- Add a new KTR_STRUCT_ARRAY ktrace record type which dumps an array of
  structures.

  The structure name in the record payload is preceded by a size_t
  containing the size of the individual structures.  Use this to
  replace the previous code that dumped the kevent arrays dumped for
  kevent().  kdump is now able to decode the kevent structures rather
  than dumping their contents via a hexdump.

  One change from before is that the 'changes' and 'events' arrays are
  not marked with separate 'read' and 'write' annotations in kdump
  output.  Instead, the first array is the 'changes' array, and the
  second array (only present if kevent doesn't fail with an error) is
  the 'events' array.  For kevent(), empty arrays are denoted by an
  entry with an array containing zero entries rather than no record.

- Move kevent decoding tables from truss to libsysdecode.

  This adds three new functions to decode members of struct kevent:
  sysdecode_kevent_filter, sysdecode_kevent_flags, and
  sysdecode_kevent_fflags.

  kdump uses these helper functions to pretty-print kevent fields.

- Move structure definitions for freebsd11 and freebsd32 kevent
  structures to <sys/event.h> so that they can be shared with userland.
  The 32-bit structures are only exposed if _WANT_KEVENT32 is defined.
  The freebsd11 structures are only exposed if _WANT_FREEBSD11_KEVENT is
  defined.  The 32-bit freebsd11 structure requires both.

- Decode freebsd11 kevent structures in truss for the compat11.kevent()
  system call.

- Log 32-bit kevent structures via ktrace for 32-bit compat kevent()
  system calls.

- While here, constify the 'void *data' argument to ktrstruct().

Reviewed by:	kib (earlier version)
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D12470
2017-11-25 04:49:12 +00:00
Pedro F. Giffuni
df57947f08 spdx: initial adoption of licensing ID tags.
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.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Initially, only tag files that use BSD 4-Clause "Original" license.

RelNotes:	yes
Differential Revision:	https://reviews.freebsd.org/D13133
2017-11-18 14:26:50 +00:00
Bryan Drewery
ea825d0274 DIRDEPS_BUILD: Update dependencies.
Sponsored by:	Dell EMC Isilon
2017-10-31 00:07:04 +00:00
Ed Schouten
4e1847781b Import the latest CloudABI definitions, version 0.16.
The most important change in this release is the removal of the
poll_fd() system call; CloudABI's equivalent of kevent(). Though I think
that kqueue is a lot saner than many of its alternatives, our
experience is that emulating this system call on other systems
accurately isn't easy. It has become a complex API, even though I'm not
convinced this complexity is needed. This is why we've decided to take a
different approach, by looking one layer up.

We're currently adding an event loop to CloudABI's C library that is API
compatible with libuv (except when incompatible with Capsicum).
Initially, this event loop will be built on top of plain inefficient
poll() calls. Only after this is finished, we'll work our way backwards
and design a new set of system calls to optimize it.

Interesting challenges will include integrating asynchronous I/O into
such a system call API. libuv currently doesn't aio(4) on Linux/BSD, due
to it being unreliable and having undesired semantics.

Obtained from:	https://github.com/NuxiNL/cloudabi
2017-10-18 19:22:53 +00:00
Ed Maste
fe7f211c0e truss: mention 'H' in usage
r295930 introduced the 'H' option to display thread IDs, but did not add
the option to usage().

PR:		222837
Submitted by:	Oliver Kiddle <okiddle@yahoo.co.uk>
MFC after:	1 week
2017-10-13 13:47:55 +00:00
Ed Schouten
733ba7f881 Merge pipes and socket pairs.
Now that CloudABI's sockets API has been changed to be addressless and
only connected socket instances are used (e.g., socket pairs), they have
become fairly similar to pipes. The only differences on CloudABI is that
socket pairs additionally support shutdown(), send() and recv().

To simplify the ABI, we've therefore decided to remove pipes as a
separate file descriptor type and just let pipe() return a socket pair
of type SOCK_STREAM. S_ISFIFO() and S_ISSOCK() are now defined
identically.
2017-09-05 07:46:45 +00:00
John Baldwin
39a3a4386a Decode pathconf() names, *at() flags, and sysarch() numbers in libsysdecode.
Move tables that were previously in truss over to libsysdecode.  truss
output is unchanged, but kdump has been updated to decode these fields.
In addition, sysdecode_sysarch_number() should support all platforms
whereas the old table in truss only supported x86.
2017-09-04 05:34:36 +00:00
John Baldwin
13e5e6b616 Decode signal information returned by system calls.
Specifically, decode the siginfo structure returned by sigtimedwait(),
sigwaitinfo(), and wait6().  While here, also decode the signal number
returned in the second argument to sigwait().
2017-08-30 15:45:23 +00:00
John Baldwin
3cc32ea655 Trim stale prototype for ioctlname(). 2017-08-30 15:32:47 +00:00
Ed Schouten
b53b978a6c Complete the CloudABI networking refactoring.
Now that all of the packaged software has been adjusted to either use
Flower (https://github.com/NuxiNL/flower) for making incoming/outgoing
network connections or can have connections injected, there is no longer
need to keep accept() around. It is now a lot easier to write networked
services that are address family independent, dual-stack, testable, etc.

Remove all of the bits related to accept(), but also to
getsockopt(SO_ACCEPTCONN).
2017-08-30 07:30:06 +00:00
John Baldwin
ff577cb645 Decode extra signal information for caught signals.
Decode fields from the siginfo_t stored in the PT_LWPINFO structure when a
signal is caught by a traced process.  This includes the signal code
(si_code) as well as additional members such as si_addr, si_pid, etc.
2017-08-28 02:42:20 +00:00