Commit graph

44 commits

Author SHA1 Message Date
Lioncash 14653b00db
qobject: let object_property_get_str() use new API 2018-03-20 11:25:30 -04:00
Max Reitz 275b2ac328
qapi: Replace qobject_to_X(o) by qobject_to(X, o)
This patch was generated using the following Coccinelle script:

@@
expression Obj;
@@
(
- qobject_to_qnum(Obj)
+ qobject_to(QNum, Obj)
|
- qobject_to_qstring(Obj)
+ qobject_to(QString, Obj)
|
- qobject_to_qdict(Obj)
+ qobject_to(QDict, Obj)
|
- qobject_to_qlist(Obj)
+ qobject_to(QList, Obj)
|
- qobject_to_qbool(Obj)
+ qobject_to(QBool, Obj)
)

and a bit of manual fix-up for overly long lines and three places in
tests/check-qjson.c that Coccinelle did not find.

Backports commit 7dc847ebba953db90853d15f140c20eef74d4fb2 from qemu
2018-03-20 10:55:57 -04:00
Paolo Bonzini 37117a74ed
qom: introduce object_class_get_list_sorted
Unify half a dozen copies of very similar code (the only difference being
whether comparisons were case-sensitive) and use it also in Tricore,
which did not do any sorting of CPU model names.

Backports commit 47c66009ab793241e8210b3018c77a9ce9506aa8 from qemu
2018-03-17 19:16:25 -04:00
Eduardo Habkost 46e1c5482b
machine: Set MachineClass::name automatically
Now all TYPE_MACHINE subclasses use MACHINE_TYPE_NAME to generate the
class name. So instead of requiring each subclass to set
MachineClass::name manually, we can now set it automatically at the
TYPE_MACHINE class_base_init() function.

Backports commit 98cec76a7076c4a38e16f1a9de170a7942b3be54 from qemu
2018-03-11 14:38:58 -04:00
Markus Armbruster 3277400723
qapi: Move qapi-schema.json to qapi/, rename generated files
Move qapi-schema.json to qapi/, so it's next to its modules, and all
files get generated to qapi/, not just the ones generated for modules.

Consistently name the generated files qapi-MODULE.EXT:
qmp-commands.[ch] become qapi-commands.[ch], qapi-event.[ch] become
qapi-events.[ch], and qmp-introspect.[ch] become qapi-introspect.[ch].
This gets rid of the temporary hacks in scripts/qapi/commands.py,
scripts/qapi/events.py, and scripts/qapi/common.py.

Backports commit eb815e248f50cde9ab86eddd57eca5019b71ca78 from qemu
2018-03-09 11:35:11 -05:00
Markus Armbruster 5500a5e912
Include less of the generated modular QAPI headers
In my "build everything" tree, a change to the types in
qapi-schema.json triggers a recompile of about 4800 out of 5100
objects.

The previous commit split up qmp-commands.h, qmp-event.h, qmp-visit.h,
qapi-types.h. Each of these headers still includes all its shards.
Reduce compile time by including just the shards we actually need.

To illustrate the benefits: adding a type to qapi/migration.json now
recompiles some 2300 instead of 4800 objects. The next commit will
improve it further.

Backports commit 9af2398977a78d37bf184d6ff6bd04c72bfbf006 from qemu
2018-03-09 10:06:19 -05:00
Markus Armbruster 801dbfce3d
Include qapi/qmp/qobject.h exactly where needed
Backports commit 5ee9d2fe9e1e15d6e4a112220da3ad8a3512819b from qemu
2018-03-08 08:48:27 -05:00
Igor Mammedov c97583fc42
qom: introduce type_register_static_array()
it will help to remove code duplication of registration
static types in places that have open coded loop to
perform batch type registering.

Backports commit aa04c9d20704fa5b9ab239d5111adbcce5f49808 from qemu
2018-03-05 03:49:50 -05:00
Peter Xu 0741c3880a
qom: provide root container for internal objs
We have object_get_objects_root() to keep user created objects, however
no place for objects that will be used internally. Create such a
container for internal objects.

Backports commit 7c47c4ead75d0b733ee8f2f51fd1de0644cc1308 from qemu
2018-03-05 01:16:50 -05:00
Eduardo Habkost 570c064065
qom: Fix ambiguous path detection when ambiguous=NULL
object_resolve_path*() ambiguous path detection breaks when
ambiguous==NULL and the object tree have 3 objects of the same type and
only 2 of them are under the same parent. e.g.:

/container/obj1 (TYPE_FOO)
/container/obj2 (TYPE_FOO)
/obj2 (TYPE_FOO)

With the above tree, object_resolve_path_type("", TYPE_FOO, NULL) will
incorrectly return /obj2, because the search inside "/container" will
return NULL, and the match at "/obj2" won't be detected as ambiguous.

Fix that by always calling object_resolve_partial_path() with a non-NULL
ambiguous parameter.

Backports commit ebcc479eee740937e70a94a468effcf2126a572b from qemu
2018-03-03 22:49:21 -05:00
Igor Mammedov fe4152c6a5
qom: enforce readonly nature of link's check callback
link's check callback is supposed to verify/permit setting it,
however currently nothing restricts it from misusing it
and modifying target object from within.
Make sure that readonly semantics are checked by compiler
to prevent callback's misuse.

Backports commit 8f5d58ef2c92d7b82d9a6eeefd7c8854a183ba4a from qemu
2018-03-03 22:17:20 -05:00
Marc-André Lureau ca25248ecd
object: add uint property setter/getter
Backports commit 3152779cd63ba41331ef41659406f65b03e7911a from qemu
2018-03-03 18:43:17 -05:00
Marc-André Lureau dd77730d49
qapi: merge QInt and QFloat in QNum
We would like to use a same QObject type to represent numbers, whether
they are int, uint, or floats. Getters will allow some compatibility
between the various types if the number fits other representations.

Add a few more tests while at it.

Backports commit 01b2ffcedd94ad7b42bc870e4c6936c87ad03429 from qemu
2018-03-03 18:16:28 -05:00
Marc-André Lureau c4e0911f95
object: fix potential leak in getters
If the property is not of the requested type, the getters will leak a
QObject.

Backports commit 560f19f162529d691619ac69ed032321c7f5f1fb from qemu
2018-03-03 17:22:32 -05:00
Alex Bennée 12d7e946a1
qom/object: update class cache atomically
The idiom CPU_GET_CLASS(cpu) is fairly extensively used in various
threads and trips of ThreadSanitizer due to the fact it updates
obj->class->object_cast_cache behind the scenes. As this is just a
fast-path cache there is no need to lock updates.

However to ensure defined C11 behaviour across threads we need to use
the plain atomic_read/set primitives and keep the sanitizer happy.

Backports commit b6b3ccfda015dcd5ab50f70c189ee5cc6c622e91 from qemu
2018-02-26 05:06:40 -05:00
Eric Blake e88a7e260b
string-input-visitor: Favor new visit_free() function
Now that we have a polymorphic visit_free(), we no longer need
string_input_visitor_cleanup(); which in turn means we no longer
need to return a subtype from string_input_visitor_new() nor a
public upcast function.

Backports commit 7a0525c7be6b38d32d586e3fd12e7377ded21faa from qemu
2018-02-25 01:08:04 -05:00
Bharata B Rao 851dec945d
qom: API to get instance_size of a type
Add an API object_type_get_size(const char *typename) that returns the
instance_size of the give typename.

Backports commit 3f97b53a682d2595747c926c00d78b9d406f1be0 from qemu
2018-02-24 19:00:16 -05:00
Veronia Bahaa bafc81b1d3
util: move declarations out of qemu-common.h
Move declarations out of qemu-common.h for functions declared in
utils/ files: e.g. include/qemu/path.h for utils/path.c.
Move inline functions out of qemu-common.h and into new files (e.g.
include/qemu/bcd.h)

Backports commit f348b6d1a53e5271cf1c9f9acc4646b4b98c1771 from qemu
2018-02-22 09:25:48 -05:00
Markus Armbruster 06668850e3
include/qemu/osdep.h: Don't include qapi/error.h
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the
Error typedef. Since then, we've moved to include qemu/osdep.h
everywhere. Its file comment explains: "To avoid getting into
possible circular include dependencies, this file should not include
any other QEMU headers, with the exceptions of config-host.h,
compiler.h, os-posix.h and os-win32.h, all of which are doing a
similar job to this file and are under similar constraints."
qapi/error.h doesn't do a similar job, and it doesn't adhere to
similar constraints: it includes qapi-types.h. That's in excess of
100KiB of crap most .c files don't actually need.

Add the typedef to qemu/typedefs.h, and include that instead of
qapi/error.h. Include qapi/error.h in .c files that need it and don't
get it now. Include qapi-types.h in qom/object.h for uint16List.

Update scripts/clean-includes accordingly. Update it further to match
reality: replace config.h by config-target.h, add sysemu/os-posix.h,
sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h
comment quoted above similarly.

This reduces the number of objects depending on qapi/error.h from "all
of them" to less than a third. Unfortunately, the number depending on
qapi-types.h shrinks only a little. More work is needed for that one.

Backports commit da34e65cb4025728566d6504a99916f6e7e1dd6a from qemu
2018-02-21 23:08:18 -05:00
Daniel P. Berrange eddfb13c2c
qom: Change object property iterator API contract
Currently the ObjectProperty iterator API works as follows:

ObjectPropertyIterator *iter;

iter = object_property_iter_init(obj);
while ((prop = object_property_iter_next(iter))) {
...
}
object_property_iter_free(iter);

This has the benefit that the ObjectPropertyIterator struct
can be opaque, but has the downside that callers need to
explicitly call a free function. It is also not in keeping
with iterator style used elsewhere in QEMU/GLib2.

This patch changes the API to use stack allocation instead:

ObjectPropertyIterator iter;

object_property_iter_init(&iter, obj);
while ((prop = object_property_iter_next(&iter))) {
...
}

Backports commit 7746abd8e9ee9db20c0b0fdb19504f163ba3cbea from qemu
2018-02-21 21:03:58 -05:00
Daniel P. Berrange b97ab59f08
qom: Allow properties to be registered against classes
When there are many instances of a given class, registering
properties against the instance is wasteful of resources. The
majority of objects have a statically defined list of possible
properties, so most of the properties are easily registerable
against the class. Only those properties which are conditionally
registered at runtime need be recorded against the klass.

Registering properties against classes also makes it possible
to provide static introspection of QOM - currently introspection
is only possible after creating an instance of a class, which
severely limits its usefulness.

This impl only supports simple scalar properties. It does not
attempt to allow child object / link object properties against
the class. There are ways to support those too, but it would
make this patch more complicated, so it is left as an exercise
for the future.

There is no equivalent to object_property_del() provided, since
classes must be immutable once they are defined.

Backports commit 16bf7f522a2ff68993f80631ed86254c71eaf5d4 from qemu
2018-02-21 21:00:56 -05:00
Pavel Fedin 825bc2fb04
qom: Replace object property list with GHashTable
ARM GICv3 systems with large number of CPUs create lots of IRQ pins. Since
every pin is represented as a property, number of these properties becomes
very large. Every property add first makes sure there's no duplicates.
Traversing the list becomes very slow, therefore QEMU initialization takes
significant time (several seconds for e. g. 16 CPUs).

This patch replaces list with GHashTable, making lookup very fast. The only
drawback is that object_child_foreach() and object_child_foreach_recursive()
cannot add or remove properties during traversal, since GHashTableIter does
not have modify-safe version. However, the code seems not to modify objects
via these functions.

Backports commit b604a854e843505007c59d68112c654556102a20 from qemu
2018-02-21 13:35:10 -05:00
Eric Blake 9ec25b4673
qom: Swap 'name' next to visitor in ObjectPropertyAccessor
Similar to the previous patch, it's nice to have all functions
in the tree that involve a visitor and a name for conversion to
or from QAPI to consistently stick the 'name' parameter next
to the Visitor parameter.

Done by manually changing include/qom/object.h and qom/object.c,
then running this Coccinelle script and touching up the fallout
(Coccinelle insisted on adding some trailing whitespace).

@ rule1 @
identifier fn;
typedef Object, Visitor, Error;
identifier obj, v, opaque, name, errp;
@@
void fn
- (Object *obj, Visitor *v, void *opaque, const char *name,
+ (Object *obj, Visitor *v, const char *name, void *opaque,
Error **errp) { ... }

@@
identifier rule1.fn;
expression obj, v, opaque, name, errp;
@@
fn(obj, v,
- opaque, name,
+ name, opaque,
errp)

Backports commit d7bce9999df85c56c8cb1fcffd944d51bff8ff48 from qemu
2018-02-19 23:14:37 -05:00
Eric Blake 5dd5646a9a
qapi: Swap visit_* arguments for consistent 'name' placement
JSON uses "name":value, but many of our visitor interfaces were
called with visit_type_FOO(v, &value, name, errp). This can be
a bit confusing to have to mentally swap the parameter order to
match JSON order. It's particularly bad for visit_start_struct(),
where the 'name' parameter is smack in the middle of the
otherwise-related group of 'obj, kind, size' parameters! It's
time to do a global swap of the parameter ordering, so that the
'name' parameter is always immediately after the Visitor argument.

Additional reason in favor of the swap: the existing include/qjson.h
prefers listing 'name' first in json_prop_*(), and I have plans to
unify that file with the qapi visitors; listing 'name' first in
qapi will minimize churn to the (admittedly few) qjson.h clients.

Later patches will then fix docs, object.h, visitor-impl.h, and
those clients to match.

Done by first patching scripts/qapi*.py by hand to make generated
files do what I want, then by running the following Coccinelle
script to affect the rest of the code base:
$ spatch --sp-file script `git grep -l '\bvisit_' -- '**/*.[ch]'`
I then had to apply some touchups (Coccinelle insisted on TAB
indentation in visitor.h, and botched the signature of
visit_type_enum() by rewriting 'const char *const strings[]' to
the syntactically invalid 'const char*const[] strings'). The
movement of parameters is sufficient to provoke compiler errors
if any callers were missed.

// Part 1: Swap declaration order
@@
type TV, TErr, TObj, T1, T2;
identifier OBJ, ARG1, ARG2;
@@
void visit_start_struct
-(TV v, TObj OBJ, T1 ARG1, const char *name, T2 ARG2, TErr errp)
+(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp)
{ ... }

@@
type bool, TV, T1;
identifier ARG1;
@@
bool visit_optional
-(TV v, T1 ARG1, const char *name)
+(TV v, const char *name, T1 ARG1)
{ ... }

@@
type TV, TErr, TObj, T1;
identifier OBJ, ARG1;
@@
void visit_get_next_type
-(TV v, TObj OBJ, T1 ARG1, const char *name, TErr errp)
+(TV v, const char *name, TObj OBJ, T1 ARG1, TErr errp)
{ ... }

@@
type TV, TErr, TObj, T1, T2;
identifier OBJ, ARG1, ARG2;
@@
void visit_type_enum
-(TV v, TObj OBJ, T1 ARG1, T2 ARG2, const char *name, TErr errp)
+(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp)
{ ... }

@@
type TV, TErr, TObj;
identifier OBJ;
identifier VISIT_TYPE =~ "^visit_type_";
@@
void VISIT_TYPE
-(TV v, TObj OBJ, const char *name, TErr errp)
+(TV v, const char *name, TObj OBJ, TErr errp)
{ ... }

// Part 2: swap caller order
@@
expression V, NAME, OBJ, ARG1, ARG2, ERR;
identifier VISIT_TYPE =~ "^visit_type_";
@@
(
-visit_start_struct(V, OBJ, ARG1, NAME, ARG2, ERR)
+visit_start_struct(V, NAME, OBJ, ARG1, ARG2, ERR)
|
-visit_optional(V, ARG1, NAME)
+visit_optional(V, NAME, ARG1)
|
-visit_get_next_type(V, OBJ, ARG1, NAME, ERR)
+visit_get_next_type(V, NAME, OBJ, ARG1, ERR)
|
-visit_type_enum(V, OBJ, ARG1, ARG2, NAME, ERR)
+visit_type_enum(V, NAME, OBJ, ARG1, ARG2, ERR)
|
-VISIT_TYPE(V, OBJ, NAME, ERR)
+VISIT_TYPE(V, NAME, OBJ, ERR)
)

Backports commit 51e72bc1dd6ace6e91d675f41a1f09bd00ab8043 from qemu
2018-02-19 22:45:07 -05:00
Eric Blake 4e9c5e4d52
qapi: Consistent generated code: prefer visitor 'v'
We had some pointless differences in the generated code for visit,
command marshalling, and events; unifying them makes it easier for
future patches to consolidate to common helper functions.
This is one patch of a series to clean up these differences.

This patch names the local visitor variable 'v' rather than 'm'.
Related objects, such as 'QapiDeallocVisitor', are also named by
their initials instead of an unrelated leading m.

No change in semantics to the generated code.

Backports commit f8b7f1a8eafa9f565ebecfe409e8741d38cd786b from qemu
2018-02-19 18:21:53 -05:00
Peter Maydell 728aabd4c3
qom: Clean up includes
Clean up includes so that osdep.h is included first and headers
which it implies are not included manually.

This commit was created with scripts/clean-includes.

Backports commit 9bbc853bd4fc6e4cbdbfc8d52eab0730d3ba94ba from qemu
2018-02-19 01:31:35 -05:00
Daniel P. Berrange 3ba8959dfd
qom: Introduce ObjectPropertyIterator struct for iteration
Some users of QOM need to be able to iterate over properties
defined against an object instance. Currently they are just
directly using the QTAIL macros against the object properties
data structure.

This is bad because it exposes them to changes in the data
structure used to store properties, as well as changes in
functionality such as ability to register properties against
the class.

This provides an ObjectPropertyIterator struct which will
insulate the callers from the particular data structure
used to store properties. It can be used thus

ObjectProperty *prop;
ObjectPropertyIterator *iter;

iter = object_property_iter_init(obj);
while ((prop = object_property_iter_next(iter))) {
... do something with prop ...
}
object_property_iter_free(iter);

Backports commit a00c94824126901168bca5b89147f9e334a49e87 from qemu
2018-02-17 18:39:00 -05:00
Eric Blake 085a89bef5
error: More error_setg() usage
A few uses of error_set(ERROR_CLASS_GENERIC_ERROR) were missed in
c6bd8c706, or have snuck in since. Nuke them.

Backports commit 455b0fde8c38a0794743e2e7c1a40018b7bee9f6 from qemu
2018-02-17 18:04:00 -05:00
Cao jin 73c55b2eb3
qom/object: fix 2 comment typos
Also change the misleading definition of macro OBJECT_CLASS_CHECK

Backports commit b30d80546421c6ea919096b596887f496c80af0a from qemu
2018-02-17 15:38:14 -05:00
Peter Crosthwaite a249923d4d
qom: Add recursive version of object_child_for_each
Useful for iterating through an entire QOM subtree.

Backports commit d714b8de7747f20fe42e5716d1d44f91e2b891f4 from qemu
2018-02-17 15:23:35 -05:00
Markus Armbruster 1b38f5208f
qom: Fix invalid error check in property_get_str()
When a function returns a null pointer on error and only on error, you
can do

if (!foo(foos, errp)) {
... handle error ...
}

instead of the more cumbersome

Error *err = NULL;

if (!foo(foos, &err)) {
error_propagate(errp, err);
... handle error ...
}

A StringProperty's getter, however, may return null on success! We
then fail to call visit_type_str().

Screwed up in 6a146eb, v1.1.

Fails tests/qom-test in my current, heavily hacked QAPI branch. No
reproducer for master known (but I didn't look hard).

Backports commit a479b21c111a87a50203a7413c4e5ec419fc88dd from qemu
2018-02-17 15:23:24 -05:00
Eduardo Habkost a439a8c701
qom: strdup() target property name on object_property_add_alias()
With this, object_property_add_alias() callers can safely free the
target property name, like what already happens with the 'name' argument
to all object_property_add*() functions.

Backports commit 1590d266d96b3f9b42443d6388dfc38f527ac2d8 from qemu
2018-02-17 15:23:19 -05:00
Markus Armbruster 76c16a46c7
qerror: Clean up QERR_ macros to expand into a single string
These macros expand into error class enumeration constant, comma,
string. Unclean. Has been that way since commit 13f59ae.

The error class is always ERROR_CLASS_GENERIC_ERROR since the previous
commit.

* Prepend every use of a QERR_ macro by ERROR_CLASS_GENERIC_ERROR, and
delete it from the QERR_ macro. No change after preprocessing.

* Rewrite error_set(ERROR_CLASS_GENERIC_ERROR, ...) into
error_setg(...). Again, no change after preprocessing.

Backports commit c6bd8c706a799eb0fece99f468aaa22b818036f3 from qemu
2018-02-17 15:23:09 -05:00
Markus Armbruster 349447b324
qerror: Eliminate QERR_DEVICE_NOT_FOUND
Error classes other than ERROR_CLASS_GENERIC_ERROR should not be used
in new code. Hiding them in QERR_ macros makes new uses hard to spot.
Fortunately, there's just one such macro left. Eliminate it with this
coccinelle semantic patch:

@@
expression EP, E;
@@
-error_set(EP, QERR_DEVICE_NOT_FOUND, E)
+error_set(EP, ERROR_CLASS_DEVICE_NOT_FOUND, "Device '%s' not found", E)

Backports commit 75158ebbe259f0bd8bf435e8f4827a43ec89c877 from qemu
2018-02-17 15:23:09 -05:00
Eric Blake d544d83348
qobject: Use 'bool' for qbool
We require a C99 compiler, so let's use 'bool' instead of 'int'
when dealing with boolean values. There are few enough clients
to fix them all in one pass.

Backports commit fc48ffc39ed1060856475e4320d5896f26c945e8 from qemu
2018-02-17 15:23:09 -05:00
Andreas Färber 15b820e72b
qom: Fix object_property_add_alias() with [*]
Commit 8074264 (qom: Add description field in ObjectProperty struct)
introduced property descriptions and copied them for alias properties.

Instead of using the caller-supplied property name, use the returned
property name for setting the description. This avoids an Error when
setting a property description for a property with literal "[*]" that
doesn't exist due to automatic property naming in object_property_add().

Backports commit a18bb417e954ceea0a30b46c38b0d58c3a7ca6a1 from qemu
2018-02-12 16:33:58 -05:00
xorstream 770c5616e2 Automated leading tab to spaces conversion. 2017-01-21 12:28:22 +11:00
xorstream 1aeaf5c40d This code should now build the x86_x64-softmmu part 2. 2017-01-19 22:50:28 +11:00
Chris Eagle fccbcfd4c2 revert to use of g_free to make future qemu integrations easier (#695)
* revert to use of g_free to make future qemu integrations easier

* bracing
2016-12-21 22:28:36 +08:00
Chris Eagle e46545f722 remove glib dependency by provide compatible replacements 2016-12-18 14:56:58 -08:00
Fish ad7ae63e92 Remove unmapped/freed memory regions from the object property list.
This commit fixes the following issues:
- Any unmapped/free'd memory regions (MemoryRegion instances) are not
  removed from the object property linked list of its owner (which is
  always qdev_get_machine(uc)). This issue makes adding new memory
  mapping by calling mem_map() or mem_map_ptr() slower as more and more
  memory pages are mapped and unmapped - yes, even if those memory pages
  are unmapped, they still impact the speed of future memory page
  mappings due to this issue.
- FlatView is not reconstructed after a memory region is freed during
  unmapping, which leads to a use-after-free the next time a new memory
  region is mapped in address_space_update_topology().
2016-10-20 03:48:58 -07:00
Nguyen Anh Quynh 2f297bdd3a handle some errors properly so avoid exit() during initialization. this fixes issue #237 2015-11-12 01:43:41 +08:00
Nguyen Anh Quynh b66a323b19 do not free MemoryRegion in memory_unmap() because it will be unref later in memory_region_unref(). this fixes issue #202 2015-10-28 01:26:59 +08:00
Nguyen Anh Quynh 344d016104 import 2015-08-21 15:04:50 +08:00