In the near future zx_port_{wait,queue} will not accept a count of zero.
Change all callers to call these functions with a count of one.
Change-Id: If37933344e07b96f07504e2837c0c12133a7cb4e
Reviewed-on: https://dart-review.googlesource.com/51500
Reviewed-by: Zach Anderson <zra@google.com>
To pass a CWD to a child through launchpad, simply set
the PWD environment variable, and the child will open
their CWD relative to their root handle when they initialize.
Change-Id: I24cd01c05e705c5a0ec2dfbaae4dbe8de42d7ed4
Reviewed-on: https://dart-review.googlesource.com/15421
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Zach Anderson <zra@google.com>
Shortly, the zx_port_queue and zx_port_wait system calls will take
pointers to zx_port_packet_t instead of void. They currently take void
as the last vestiges of the ports v1 and v2 compatibility story.
All callers are passing actual pointers to zx_port_packet_t, so there
is no real code change.
Change-Id: I8f61791846c7693d70edc8c37c1973e8637949bb
Reviewed-on: https://dart-review.googlesource.com/9796
Reviewed-by: Zach Anderson <zra@google.com>
These were left out of order by the mechanical changes that were part
of Fuchsia's Magenta->Zircon rename.
Change-Id: I41c81eb889c6076ffe82102018721e5abc74e7ac
Reviewed-on: https://dart-review.googlesource.com/6165
Reviewed-by: Zach Anderson <zra@google.com>
Fuchsia requires the ability to sandbox Isolates w.r.t. file IO.
When a new Isolate starts, Fuchsia will pass the Isolate an object
called a namespace. We can translate the namespace object into a
file descriptor suitable for passing to the *at() family of
POSIX file system calls. The file system calls will then
have visibility only into the specified namespace.
We also plumb Namespaces through on all the other platforms as well to
make the change easier to test and so that in the future we can
implement e.g. per-isolate cwds.
This change adds a new internal class to dart:io called _Namespace,
which is implemented in a patch file. See:
sdk/lib/io/namespace_impl.dart
runtime/bin/namespace_patch.dart
The embedder can set up a non-default namespace by calling
_Namespace._setupNamespace during Isolate setup.
Instances of _Namespace have a native field that holds a pointer
to a native Namespace object. See:
runtime/bin/namespace.h
Calls from e.g. file_impl.dart are now also passed a
_Namespace object. The implementations in e.g. file.cc and
file_linux.cc then extract the namespace, and use it to compute a
file descriptor and path suitable for passing to e.g. openat().
related US-313
R=asiva@google.com, rmacnak@google.com
Review-Url: https://codereview.chromium.org/3007703002 .
This CL rewrites the EventHandler on Fuchsia to use
the low-level ports system call API instead of the
epoll() emulation in musl. This will allow the
Magenta team to remove the epoll() emulation and
the deprecated system call API it is based on.
The new ports API doesn't provide epoll()-like
edge-triggering that clients of the EventHandler
expect. Therefore, this CL emulates it by adding
a level of indirection through a new "IOHandle"
object, which the socket code now uses instead
of file descriptors. This is similar to what we do
on Windows. See the comment at the top of
eventhandler_fuchsia.cc for more details.
Fuchsia issue US-251
R=asiva@google.com
Review-Url: https://codereview.chromium.org/2910853002 .
process_fuchsia.cc has the ability to drain stdout, stderr, and exit
status from a child process. It was using epoll to multiplex these
streams which worked but required complicated emulation in libc which
we'd like to unwind as well as some tricky locking. This replaces the
epoll with a direct mx_object_wait_many() call that waits on the
Magenta handles backing the streams.
R=zra@google.com
Review-Url: https://codereview.chromium.org/2903373003 .
Like HOST_ARCH_*, HOST_OS_* describes the OS the VM is running on, which may be different from the OS the VM is generating code for during AOT compilation.
Currently we conflate the two when emitting AOT as assembly, and we get away with it because Flutter only uses assembly for targeting iOS and one can only target iOS from a Mac, but we expect to use assembly for Android as well so native tools can unwind Dart frames.
R=zra@google.com
Review-Url: https://codereview.chromium.org/2750843003 .
Now, failing to allocate a buffer for stderr or stdout will generate
an ENOMEM OSError exception.
Also previously, read() returning an error would cause buffers for
stderr and stdout to leak. After this change, they'll be reclaimed.
R=asiva@google.com
Review-Url: https://codereview.chromium.org/2596543002 .
This CL adds targets to the GN build that build the standalone Dart VM
without the observatory, and with dart:io enabled but with most of the
functionality stubbed out as UNIMPLEMENTED(). It also adds a simple
eventhandler for Fuchsia for implementing Timers.
R=asiva@google.com, johnmccutchan@google.com
Review URL: https://codereview.chromium.org/2168193002 .
Adam Barth