The hypertrace channel allows guest code to emit events in QEMU (the host) using
its tracing infrastructure (see "docs/trace.txt"). This works in both 'system'
and 'user' modes, is architecture-agnostic and introduces minimal noise on the
guest.
See first commit for a full description, use-cases and an example.
Signed-off-by: Lluís Vilanova <vilan...@ac.upc.edu>
---
Changes in v4
=============
* Fix typo in stap script example.
* Fix compilation instructions in doc/hypertrace.txt.
* Rebase on 0737f32daf.
Changes in v3
=============
* Rebase on 4a58f35.
* Remove debugging printf's.
* Fix style issues identified by checkpatch.
* Fix control channel mapping in guest linux module.
* Add a short event description in "trace-events".
* Polish documentation in 1st patch.
Changes in v2
=============
* Remove unnecessary casts for g2h() [Eric Blake].
* Use perror() [Eric Blake].
* Avoid expansions in application example [Eric Blake].
* Add copyright in document "hypertrace.txt" [Eric Blake].
* Make the user-mode hypertrace invocations thread-safe [Stefan Hajnoczi].
* Split dynamic hypertrace configuration into a separate "config" channel.
Lluís Vilanova (6):
hypertrace: Add documentation
hypertrace: Add tracing event "guest_hypertrace"
hypertrace: [*-user] Add QEMU-side proxy to "guest_hypertrace" event
hypertrace: [softmmu] Add QEMU-side proxy to "guest_hypertrace" event
hypertrace: Add guest-side user-level library
hypertrace: Add guest-side Linux module
Makefile | 8
Makefile.objs | 6
bsd-user/main.c | 17 +
bsd-user/mmap.c | 15 +
bsd-user/syscall.c | 34 +-
configure | 40 ++
docs/hypertrace.txt | 237 ++++++++++++++
docs/tracing.txt | 3
hypertrace/Makefile.objs | 21 +
hypertrace/common.c | 26 ++
hypertrace/common.h | 23 +
hypertrace/guest/linux-module/Kbuild.in | 7
hypertrace/guest/linux-module/Makefile | 23 +
.../include/linux/qemu-hypertrace-internal.h | 46 +++
.../linux-module/include/linux/qemu-hypertrace.h | 73 ++++
hypertrace/guest/linux-module/qemu-hypertrace.c | 149 +++++++++
hypertrace/guest/user/Makefile | 30 ++
hypertrace/guest/user/common.c | 296 ++++++++++++++++++
hypertrace/guest/user/qemu-hypertrace.h | 80 +++++
hypertrace/softmmu.c | 235 ++++++++++++++
hypertrace/user.c | 332 ++++++++++++++++++++
hypertrace/user.h | 63 ++++
include/hw/pci/pci.h | 2
include/qom/cpu.h | 4
linux-user/main.c | 19 +
linux-user/mmap.c | 17 +
linux-user/qemu.h | 3
linux-user/syscall.c | 31 +-
trace-events | 11 +
trace/Makefile.objs | 2
30 files changed, 1826 insertions(+), 27 deletions(-)
create mode 100644 docs/hypertrace.txt
create mode 100644 hypertrace/Makefile.objs
create mode 100644 hypertrace/common.c
create mode 100644 hypertrace/common.h
create mode 100644 hypertrace/guest/linux-module/Kbuild.in
create mode 100644 hypertrace/guest/linux-module/Makefile
create mode 100644
hypertrace/guest/linux-module/include/linux/qemu-hypertrace-internal.h
create mode 100644
hypertrace/guest/linux-module/include/linux/qemu-hypertrace.h
create mode 100644 hypertrace/guest/linux-module/qemu-hypertrace.c
create mode 100644 hypertrace/guest/user/Makefile
create mode 100644 hypertrace/guest/user/common.c
create mode 100644 hypertrace/guest/user/qemu-hypertrace.h
create mode 100644 hypertrace/softmmu.c
create mode 100644 hypertrace/user.c
create mode 100644 hypertrace/user.h
To: qemu-devel@nongnu.org
Cc: Stefan Hajnoczi <stefa...@redhat.com>
Cc: Eric Blake <ebl...@redhat.com>
Cc: Luiz Capitulino <lcapitul...@redhat.com>
Cc: Daniel P Berrange <berra...@redhat.com>
