Version 2.0-pre10

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

x86-32: override sys_mmap syscall instrumentation

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix cast warning

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Version 2.0-pre9

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

x86 32 syscalls: fix !CONFIG_UID16

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Use __string_from_user

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add __string_from_user

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Complete comm -> procname change

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Rename "comm" context to "procname"

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fetch "type" name field for mount syscall

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Create common override file for all architectures

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Shrink stack size usage

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Cleanup: remove unused lttng-compat-syscalls.c file

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Support detailed compat syscalls on x86_64

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix syscall table

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add disabled compat syscalls detail (work in progress)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add config compat support for detailed x86_32 syscalls

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Handle newer 3.1+ perf API

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add dummy x86-32 override headers

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Bind x86-32 syscall headers

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add x86-32 syscall headers

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add check for KALLSYMS_ALL in syscall extraction script

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Automate string extraction for syscalls

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Automate syscall filename/pathname extraction

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add exit to ring_buffer_frontend so module is unloadable

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add sys_open filename (x86_64)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add missing memcpy callback

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

copy_from_user and memset

This patch provides the copy_from_user and memset operations for the lib
ringbuffer.

[ edit: tp_copy_string_from_user len parameter now excludes final \0 ]

Signed-off-by: Julien Desfossez <julien.desfossez@polymtl.ca>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add missing alignment after header write

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

lib ring buffer: add frontend init as module_init

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

lib ring buffer frontend: add missing lock initialization

[...]
while enabling the events, I get following output:

[ 4304.827819] BUG: spinlock bad magic on CPU#1, ltt-sessiond/1305
[ 4304.841735]  lock: 81453c00, .magic: 00000000, .owner: <none>/-1,
.owner_cpu: 0
[ 4304.857421] [<800110ad>] (unwind_backtrace+0x1/0x90) from
[<8022c847>] (do_raw_spin_lock+0x17/0xfc)
[ 4304.875213] [<8022c847>] (do_raw_spin_lock+0x17/0xfc) from
[<7f97c30f>] (channel_create+0xd6/0x158 [lib_ring_buffer])
[ 4304.894866] [<7f97c30f>] (channel_create+0xd6/0x158
[lib_ring_buffer]) from [<7f99856b>] (_channel_create+0x28/0x32
[ltt_ring_buffer_client_discard])
[ 4304.917755] [<7f99856b>] (_channel_create+0x28/0x32
[ltt_ring_buffer_client_discard]) from [<7f98b507>]
(ltt_channel_create+0x12a/0x190 [ltt_relay])
[ 4304.940551] [<7f98b507>] (ltt_channel_create+0x12a/0x190 [ltt_relay])
from [<7f98c34b>] (lttng_abi_create_channel+0xba/0x158 [ltt_relay])
[ 4304.962341] [<7f98c34b>] (lttng_abi_create_channel+0xba/0x158
[ltt_relay]) from [<7f98c43f>] (lttng_session_ioctl+0x56/0x64 [ltt_relay])
[ 4304.984436] [<7f98c43f>] (lttng_session_ioctl+0x56/0x64 [ltt_relay])
from [<800baa49>] (do_vfs_ioctl+0x1a5/0x1dc)
[ 4305.004394] [<800baa49>] (do_vfs_ioctl+0x1a5/0x1dc) from [<800baab3>]
(sys_ioctl+0x33/0x4c)
[ 4305.022369] [<800baab3>] (sys_ioctl+0x33/0x4c) from [<8000c2c1>]
(ret_fast_syscall+0x1/0x50)
All kernel events are enabled in channel channel0

Reported-by: Avik Sil <avik.sil@linaro.org>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

ARM: Set bit 0 for thumb mode in kallsyms_lookup_name returned address (missing file)

Adding missing file in commit c539a324b020171c10d0fcb100892ac93c17e9e7

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

ARM: Set bit 0 for thumb mode in kallsyms_lookup_name returned address

This patch fixes the undefined instruction oops due to execution
of thumb-2 code in ARM mode. The zero bit in the symbol address
returned by kallsyms_lookup_name is not set, leading to switching
to ARM mode that generates oops while executing thumb-2 code. For
detailed discussion, see [1].
[1] http://lists.casi.polymtl.ca/pipermail/ltt-dev/2011-September/005176.html

v1:
        - include wrapper function kallsyms_lookup_funcptr as suggested
        by Dave Martin

Signed-off-by: Avik Sil <avik.sil@linaro.org>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Create override for sys_mmap

based on mmap(2).

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Rename syscalls -> syscall in LTTng ABI

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Use different event name for compat syscalls

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Allow trace syscall table override

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add dummy override files

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

syscall detail: add override capability

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add pointer pretty-print heuristics

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add __field_hex

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Rename sys exit errno into ret

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Enable detailed syscalls only for native x86_64

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Use "unknown" for compat syscalls

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Disable x86-64 specific detailed syscalls for now, until we deal with 32-bit compat

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix syscall exit

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix syscall exit tracing

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Remove unused variable

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix sys exit

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix unknown syscall support

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Only enable detailed syscalls for x86_64 for now

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Merge unknown syscall method with extended detail method

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add underscore prefix before event names

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add syscalls pointers detailed syscall tracing

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Use perl for regexp

Allows more than 9 backward refs.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Support generation of syscall probes for those with pointers

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Support detailed syscalls with 0 arguments

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

detailed syscall tracing (work in progress)

Buidl disabled for now.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Expose /proc/lttng file

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Implement detailed syscall event probe

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Disable perf build for < 2.6.33 kernels

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Syscall detail mode: generate syscall table

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

block instrumentation: write cmd as hex sequence

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

lttng-events TRACE_EVENT generator cleanup

Adds support for _hex variants while cleaning up and refactoring macros,
removing duplicatas.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

block layer instrumentation: fix cmd field

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Remove 0 args syscalls for now from type-aware syscall cb generator

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Generate trace syscall table macros

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

standardize on "syscalls"

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Put syscall tracing without arg types back in place

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Revert to working code for now

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Detailed system call tracing (TRACE_EVENT() generation for integer support)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

lttng events probes: don't clash with "ctx" variable name

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Merge branch 'master' of ssh://git.lttng.org/home/git/lttng-modules

lib ring buffer must take private pointer copy before decrementing refcount

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

ChangeLog for v2.0-pre8

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix metadata buffer wait/wakeup

The metadata producer should be waiting on its own wait queue, woken up
when the consumer position is moved by the consumer.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add changelog

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add missing module refcount to lttng_tracepoint_list_fops

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add license info about lib/ringbuffer/ring_buffer_mmap.c being GPLv2

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix calibrate: add noinline

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Calibrate namespacing

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Merge branch 'master' of ssh://git.lttng.org/home/git/lttng-modules

Update ring buffer frontend comment wrt code change

Teardown does not wait for readers anymore: it just decrements the
refcount.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update metadata header to CTF 1.8

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Commit timestamp guarantees

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add info about kretprobes

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update calibration

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add calibration ioctl

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Add kretprobe support

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update ftrace wrapper

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Perf counter support: check if busy

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update readme: discuss perf counters

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Fix context order: stream before event

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

LTTng kprobes support: fix empty symbol name handling

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Perf counter context info needs to be at fixed addresses

Fixes a kernel oops when using perf counter with multiple contexts. The
cpu hotplug notifier callback needs to have the callback notifier block
at a fixed address, but the context array may move as it is expanded.

The reason why we use a context array instead of an array of pointers is
to minimize the amount of memory accesses in the tracing hot path.

Let's special-case perf counters and put them in their own memory region
to account for cpu hotplug requirements.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

context: document and check that only last context is removed

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Update readme

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

sched instrumentation: show user-visible prio

/proc exports task_prio priority (offset - MAX_RT_PRIO). Export the
user-visible priority from scheduler events rather than the
implementation-specific priority.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

scheduler instrumentation: rename "pid" fields to "tid"

The Linux getpid(), gettid() ABIs present "tid == thread id" and "pid ==
process id".

The internal Linux kernel representation is "pid == thread id" and "tgid
== process id".

Given that we want to expose an ABI to end-users that matches the
vision of user-space (rather than that of the implementation), use "tid"
field names to represent thread ids in the sched events.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Build fix: check if have syscall tracepoint config

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>