Signed-off-by: Avi Kivity <avi@cloudius-systems.com>

Looking up symbols is expensive, store them in a cache.

Speeds up dumping the trace log when a backtrace is taken.

Signed-off-by: Avi Kivity <avi@cloudius-systems.com>

Signed-off-by: Avi Kivity <avi@cloudius-systems.com>

Also fix other review comments related to 1f161695.

Signed-off-by: Avi Kivity <avi@cloudius-systems.com>

Fix up the error message as suggested by Nadav.

Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>

This adds a user-friendly error message to run.py if QEMU/KVM is not
installed.

Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>

Port 22 is usually taken on the host, so use port 2222 instead.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>

If Apache Ant is not found, the build fails with a cryptic error
message:

  [penberg@localhost osv]$ make
    ANT tests/bench
  Traceback (most recent call last):
    File "scripts/silentant.py", line 14, in <module>
      stderr = subprocess.PIPE)
    File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
      errread, errwrite)
    File "/usr/lib64/python2.7/subprocess.py", line 1308, in _execute_child
      raise child_exception
  OSError: [Errno 2] No such file or directory
  make: *** [all] Error 1

Make it more human friendly:

  [penberg@localhost osv]$ make
    ANT tests/bench
  Apache Ant not found. Please install the 'ant' package.
  make: *** [all] Error 1

Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>

OSerror exceptions throwed by subprocess.call are made silent using pass.
Fix this by properly catching the exception and pretty print it.

Signed-off-by: Benoit Canet <benoit@irqsave.net>

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>

Don't use stdio and specify -daemonize when user wants to attach
with qemu.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>

--detach is a boolean, shouldn't accept a flag.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>

We want to access the guest even when we're using usermode
networking. Redirect port 8080 to the outside.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>

So far, our run.py script only runs qemu-based VMs, like KVM. For Xen, I was
resorting to manually run xl. This patch implements xen support in that script.

We do need a bit of extra information, like the bridge name. I am defaulting to
F19's, allowing the user to set it up. We can do better by trying to guess from
reading what is in the system, but this will do for now.

Another problem is the console, which Xen does not redirect to stdio. We have
to attach one, but detaching it does not kill the guest, as it happens with the
qemu-based VMs. Because of that, I am defaulting to include the "-c" option to
automatically attach a console, but for people who would like to have it on
background, an option to not include it.

Command line option: --trace-backtraces

Nobody cares about vma address and it's easy to confuse it to the vma start address so drop it from "osv mmap" output.

Suggested by Nadav Har'El.

Fix up memory layout of 'class vma' for 'osv mmap' gdb command.

use to dump tracepoints to a file - trace.txt, x100 faster ;)

Given a partition size and start address, this will edit the image passed as parameter
to create a partition entry. This assumes the disk is always bigger than 8Gb while setting
the CHS address. From osdev wiki:

"For drives smaller than 8GB, the LBA fields and the CHS fields must "match"
 when the values are converted into the other format.  For drives bigger than
 8GB, generally the CHS fields are set to Cylinder = 1023, Head = 254 or 255,
 Sector = 63 -- which is considered an invalid setting."

It currently sits in the middle of the partition table. Move it to a safer
location.

Now that we can walk through the vma list, add mmap numbers to 'osv
mem':

  (gdb) osv mem
  Total Memory: 4294564864 Bytes
  Mmap Memory:  3278278656 Bytes (76.34%)
  Free Memory:  474492928 Bytes (11.05%)

Once all the bugs vs I/O error handling in virtio-blk are fixed we'll
actually need this.

Alternatively we could just remove it, but doing recursive removes in
a top-level directory as root seem a bit too dangerous for a build
process.

We want to use timers for more than just waking up threads (in this case, for
the scheduler time slice), so we need to remove the internal dependencies.

The timer class is split into timer_base, which does most of the work,
and timer, which preserves the original timer interface.

The timer-related parts of 'class thread' are split off into a new class
timer_base::client, which thread inherits from.

Timers currently have two states: expired, and not expired.  But how is
cancel() to distinguish between an armed-but-not-expired timer, and a timer
which was never armed (using set())?  It can't, and will probably crash.

Fix by adding a state to the timer.  Now there are three distinct states:
free, armed, and expired, corresponding to the timer life cycle.

I have been commenting in and out lines in this script to choose the right
underlying hypervisor to run. So here is the automated version of it. I haven't
choosed the letters h or y because they usually denote help and yes,
respectively. Also not a kvm/no-kvm boolean because very soon we will like to
include xen.

Signed-off-by: Glauber Costa <glommer@cloudius-systems.com>

Allows networking to work without reconfiguration or dhcp.

Place the tracepointv type in an anonymous namespace.  This makes every
translation unit have its own unique tracepoint types, so we only need
to ensure uniqueness within a source file.

Use the type's type_info to select the correct patch sites.

Idea from Nadav.