Commit Graph

474 Commits

Author SHA1 Message Date
Markus Armbruster
7b24626cd0 qapi-event: Eliminate global variable event_enum_value
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1442401589-24189-11-git-send-email-armbru@redhat.com>
2015-09-21 09:56:48 +02:00
Markus Armbruster
efd2eaa6c2 qapi: De-duplicate enum code generation
Duplicated in commit 21cd70d.  Yes, we can't import qapi-types, but
that's no excuse.  Move the helpers from qapi-types.py to qapi.py, and
replace the duplicates in qapi-event.py.

The generated event enumeration type's lookup table becomes
const-correct (see commit 2e4450f), and uses explicit indexes instead
of relying on order (see commit 912ae9c).

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1442401589-24189-10-git-send-email-armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-21 09:56:47 +02:00
Markus Armbruster
ee44602857 qapi-commands: Convert to QAPISchemaVisitor
Output unchanged apart from reordering and white-space.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1442401589-24189-9-git-send-email-armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
2015-09-21 09:56:47 +02:00
Markus Armbruster
441cbac0c7 qapi-visit: Convert to QAPISchemaVisitor, fixing bugs
Fixes flat unions to visit the base's base members (the previous
commit merely added them to the struct).  Same test case.

Patch's effect on visit_type_UserDefFlatUnion():

     static void visit_type_UserDefFlatUnion_fields(Visitor *m, UserDefFlatUnion **obj, Error **errp)
     {
         Error *err = NULL;

    +    visit_type_int(m, &(*obj)->integer, "integer", &err);
    +    if (err) {
    +        goto out;
    +    }
         visit_type_str(m, &(*obj)->string, "string", &err);
         if (err) {
             goto out;

Test cases updated for the bug fix.

Fixes alternates to generate a visitor for their implicit enumeration
type.  None of them are currently used, obviously.  Example:
block-core.json's BlockdevRef now generates
visit_type_BlockdevRefKind().

Code is generated in a different order now, and therefore has got a
few new forward declarations.  Doesn't matter.

The guard QAPI_VISIT_BUILTIN_VISITOR_DECL is renamed to
QAPI_VISIT_BUILTIN.

The previous commit's two ugly special cases exist here, too.  Mark
both TODO.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-21 09:56:40 +02:00
Markus Armbruster
2b162ccbe8 qapi-types: Convert to QAPISchemaVisitor, fixing flat unions
Fixes flat unions to get the base's base members.  Test case is from
commit 2fc0043, in qapi-schema-test.json:

    { 'union': 'UserDefFlatUnion',
      'base': 'UserDefUnionBase',
      'discriminator': 'enum1',
      'data': { 'value1' : 'UserDefA',
                'value2' : 'UserDefB',
                'value3' : 'UserDefB' } }

    { 'struct': 'UserDefUnionBase',
      'base': 'UserDefZero',
      'data': { 'string': 'str', 'enum1': 'EnumOne' } }

    { 'struct': 'UserDefZero',
      'data': { 'integer': 'int' } }

Patch's effect on UserDefFlatUnion:

     struct UserDefFlatUnion {
         /* Members inherited from UserDefUnionBase: */
    +    int64_t integer;
         char *string;
         EnumOne enum1;
         /* Own members: */
         union { /* union tag is @enum1 */
             void *data;
             UserDefA *value1;
             UserDefB *value2;
             UserDefB *value3;
         };
     };

Flat union visitors remain broken.  They'll be fixed next.

Code is generated in a different order now, but that doesn't matter.

The two guards QAPI_TYPES_BUILTIN_STRUCT_DECL and
QAPI_TYPES_BUILTIN_CLEANUP_DECL are replaced by just
QAPI_TYPES_BUILTIN.

Two ugly special cases for simple unions now stand out like sore
thumbs:

1. The type tag is named 'type' everywhere, except in generated C,
   where it's 'kind'.

2. QAPISchema lowers simple unions to semantically equivalent flat
   unions.  However, the C generated for a simple unions differs from
   the C generated for its equivalent flat union, and we therefore
   need special code to preserve that pointless difference for now.

Mark both TODO.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-21 09:53:16 +02:00
Markus Armbruster
3f7dc21bee qapi: New QAPISchemaVisitor
The visitor will help keeping the code generation code simple and
reasonably separated from QAPISchema details.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1442401589-24189-5-git-send-email-armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-21 09:32:42 +02:00
Markus Armbruster
f51d8c3db1 qapi: QAPISchema code generation helper methods
New methods c_name(), c_type(), c_null(), json_type(),
alternate_qtype().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1442401589-24189-4-git-send-email-armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-21 09:32:05 +02:00
Markus Armbruster
ac88219a6c qapi: New QAPISchema intermediate reperesentation
The QAPI code generators work with a syntax tree (nested dictionaries)
plus a few symbol tables (also dictionaries) on the side.

They have clearly outgrown these simple data structures.  There's lots
of rummaging around in dictionaries, and information is recomputed on
the fly.  For the work I'm going to do, I want more clearly defined
and more convenient interfaces.

Going forward, I also want less coupling between the back-ends and the
syntax tree, to make messing with the syntax easier.

Create a bunch of classes to represent QAPI schemata.

Have the QAPISchema initializer call the parser, then walk the syntax
tree to create the new internal representation, and finally perform
semantic analysis.

Shortcut: the semantic analysis still relies on existing check_exprs()
to do the actual semantic checking.  All this code needs to move into
the classes.  Mark as TODO.

Simple unions are lowered to flat unions.  Flat unions and structs are
represented as a more general object type.

Catching name collisions in generated code would be nice.  Mark as
TODO.

We generate array types eagerly, even though most of them aren't used.
Mark as TODO.

Nothing uses the new intermediate representation just yet, thus no
change to generated files.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-21 09:31:29 +02:00
Markus Armbruster
a4bcb2080d qapi: Rename class QAPISchema to QAPISchemaParser
I want to name a new class QAPISchema.

While there, make it a new-style class.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1442401589-24189-2-git-send-email-armbru@redhat.com>
2015-09-21 09:11:42 +02:00
Peter Maydell
1c9f03b81c * Linux header update and cleanup
* Support for HyperV crash report
 * Cleanup of target-specific HMP commands
 * Multiarch batch
 * Checkpatch fix for Perl 5.22
 * NBD fix
 * Revert incorrect commit 5243722376
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* Linux header update and cleanup
* Support for HyperV crash report
* Cleanup of target-specific HMP commands
* Multiarch batch
* Checkpatch fix for Perl 5.22
* NBD fix
* Revert incorrect commit 5243722376

# gpg: Signature made Wed 16 Sep 2015 16:39:01 BST using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"

* remotes/bonzini/tags/for-upstream: (24 commits)
  nbd: release exp->blk after all clients are closed
  checkpatch: Escape left braces in regex
  monitor: uninclude cpu_ldst
  include/exec: Move cputlb exec.c defs out
  cputlb: Change tlb_set_dirty() arg to cpu
  cputlb: move CPU_LOOP() for tlb_reset() to exec.c
  translate: move real_host_page setting to -common
  tcg: Move tci_tb_ptr to -common
  tcg: split tcg_op_defs to -common
  translate-all: Move tcg_handle_interrupt() to -common
  cpu-exec: Migrate some generic fns to cpu-exec-common
  qemu-char: Use g_new() & friends where that makes obvious sense
  monitor: added generation of documentation for hmp-commands-info.hx
  hmp-commands.hx: fix end of table info
  monitor: remove target-specific code from monitor.c
  hmp-commands-info: move info_cmds content out of monitor.c
  i386/kvm: Hyper-v crash msrs set/get'ers and migration
  kvm: Add kvm system event crash handler
  cpu: Add crash_occurred flag into CPUState
  target-i386: move asm-x86/hyperv.h to standard-headers
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-09-16 18:06:54 +01:00
Fam Zheng
04f2562f8e checkpatch: Escape left braces in regex
Latest perl now deprecates "{" literal in regex and print warnings like
"unescaped left brace in regex is deprecated".  Add escape to keep it
happy.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <1441969656-2640-1-git-send-email-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-16 17:33:33 +02:00
Paolo Bonzini
73aa529a48 target-i386: move asm-x86/hyperv.h to standard-headers
The Hyper-V definitions are an industry standard and can be used
from code that is not KVM-specific.

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-16 17:33:32 +02:00
Paolo Bonzini
eddb4de3cc update-linux-headers: copy standard-headers files one by one
cp_virtio is called for both the asm-s390/ and linux/ directories,
so it looks for pci_regs.h and input.h files in asm-s390/ too.  This
makes little sense.  In the next patch we will have the opposite
problem; we want to add asm-x86/hyperv.h, and there's also a
linux/hyperv.h file with unwanted dependencies on additional Linux
uapi headers.  We do not want to copy linux/hyperv.h.

The solution is to make cp_virtio (now renamed to cp_portable) copy
one file only, instead of using the "find" command, and call it multiple
times.  The new function is really just a reindentation of the old one.

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-16 17:33:32 +02:00
Paolo Bonzini
120758fba4 update Linux headers to 4.3-rc1
The update to 4.2 was reviewed by Michael S. Tsirkin and Cornelia
Huck.  The further update to 4.3-rc1 only touches KVM files.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-16 17:33:32 +02:00
Daniel P. Berrange
351d36e454 qapi: allow override of default enum prefix naming
The camel_to_upper() method applies some heuristics to turn
a mixed case type name into an all-uppercase name. This is
used for example, to generate enum constant name prefixes.

The heuristics don't also generate a satisfactory name
though. eg

  { 'enum': 'QCryptoTLSCredsEndpoint',
    'data': ['client', 'server']}

Results in Q_CRYPTOTLS_CREDS_ENDPOINT_CLIENT. This has
an undesirable _ after the initial Q and is missing an
_ between the CRYPTO & TLS strings.

Rather than try to add more and more heuristics to try
to cope with this, simply allow the QAPI schema to
specify the desired enum constant prefix explicitly.

eg

  { 'enum': 'QCryptoTLSCredsEndpoint',
    'prefix': 'QCRYPTO_TLS_CREDS_ENDPOINT',
    'data': ['client', 'server']}

Now gives the QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT name.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-09-15 10:59:28 +01:00
Markus Armbruster
2752e5bedb qapi: Fix cgen() for Python older than 2.7
A feature new in Python 2.7 crept into commit 77e703b: re.subn()'s
fifth argument.  Avoid that, use re.compile().

Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Message-id: 1441640755-23902-1-git-send-email-armbru@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-09-14 18:02:59 +01:00
Peter Maydell
a2aa09e181 * Support for jemalloc
* qemu_mutex_lock_iothread "No such process" fix
 * cutils: qemu_strto* wrappers
 * iohandler.c simplification
 * Many other fixes and misc patches.
 
 And some MTTCG work (with Emilio's fixes squashed):
 * Signal-free TCG kick
 * Removing spinlock in favor of QemuMutex
 * User-mode emulation multi-threading fixes/docs
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* Support for jemalloc
* qemu_mutex_lock_iothread "No such process" fix
* cutils: qemu_strto* wrappers
* iohandler.c simplification
* Many other fixes and misc patches.

And some MTTCG work (with Emilio's fixes squashed):
* Signal-free TCG kick
* Removing spinlock in favor of QemuMutex
* User-mode emulation multi-threading fixes/docs

# gpg: Signature made Thu 10 Sep 2015 09:03:07 BST using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"

* remotes/bonzini/tags/for-upstream: (44 commits)
  cutils: work around platform differences in strto{l,ul,ll,ull}
  cpu-exec: fix lock hierarchy for user-mode emulation
  exec: make mmap_lock/mmap_unlock globally available
  tcg: comment on which functions have to be called with mmap_lock held
  tcg: add memory barriers in page_find_alloc accesses
  remove unused spinlock.
  replace spinlock by QemuMutex.
  cpus: remove tcg_halt_cond and tcg_cpu_thread globals
  cpus: protect work list with work_mutex
  scripts/dump-guest-memory.py: fix after RAMBlock change
  configure: Add support for jemalloc
  add macro file for coccinelle
  configure: factor out adding disas configure
  vhost-scsi: fix wrong vhost-scsi firmware path
  checkpatch: remove tests that are not relevant outside the kernel
  checkpatch: adapt some tests to QEMU
  CODING_STYLE: update mixed declaration rules
  qmp: Add example usage of strto*l() qemu wrapper
  cutils: Add qemu_strtoull() wrapper
  cutils: Add qemu_strtoll() wrapper
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-09-14 16:13:16 +01:00
Peter Maydell
30c38c90bd scripts/qemu-gdb: Add brief comment describing usage
Add a brief comment describing how to use the debug support
from GDB.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1439574392-4403-5-git-send-email-peter.maydell@linaro.org
2015-09-11 17:14:50 +01:00
Peter Maydell
5e3c72d41e scripts/qemu-gdb: Silently pass through SIGUSR1
SIGUSR1 is QEMU's IPI signal, and it gets sent a lot, so is
best silently passed through to the guest without stopping.
Make qemu-gdb.py do this bit of configuration for the user.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1439574392-4403-4-git-send-email-peter.maydell@linaro.org
2015-09-11 17:14:50 +01:00
Peter Maydell
191590f09d scripts/qemu-gdb: Split CoroutineCommand into its own file
Split the implementation of CoroutineCommand into its own file.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1439574392-4403-3-git-send-email-peter.maydell@linaro.org
2015-09-11 17:14:49 +01:00
Peter Maydell
93b1b365dc scripts/qemu-gdb: Split MtreeCommand into its own module
As we add more commands to our Python gdb debugging support, it's
going to get unwieldy to have everything in a single file. Split
the implementation of the 'mtree' command from qemu-gdb.py into
its own module.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1439574392-4403-2-git-send-email-peter.maydell@linaro.org
2015-09-11 17:14:49 +01:00
Michael S. Tsirkin
0c71d41e2a scripts/dump-guest-memory.py: fix after RAMBlock change
commit 9b8424d573
    "exec: split length -> used_length/max_length"
changed field names in struct RAMBlock

It turns out that scripts/dump-guest-memory.py was
poking at this field, update it accordingly.

Cc: qemu-stable@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <1440666378-3152-1-git-send-email-mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-09 15:34:55 +02:00
Paolo Bonzini
3f7a899ff4 add macro file for coccinelle
Coccinelle chokes on some idioms from compiler.h and queue.h.
Extract those in a macro file, to be used with "--macro-file
scripts/cocci-macro-file.h".

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-09 15:34:55 +02:00
Paolo Bonzini
f1e155bbf8 checkpatch: remove tests that are not relevant outside the kernel
Fully removing Sparse support requires more invasive changes.  Only
remove the really kernel-specific parts such as address space names.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-09 15:34:55 +02:00
Paolo Bonzini
71c47b01ca checkpatch: adapt some tests to QEMU
Mostly change severity levels, but some tests can also be adjusted to refer
to QEMU APIs or data structures.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-09 15:34:55 +02:00
Peter Maydell
b597aa037d Monitor patches
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Merge remote-tracking branch 'remotes/armbru/tags/pull-monitor-2015-09-04' into staging

Monitor patches

# gpg: Signature made Fri 04 Sep 2015 12:40:11 BST using RSA key ID EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"

* remotes/armbru/tags/pull-monitor-2015-09-04:
  hmp: add info iothreads command
  qmp-shell: add documentation

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-09-04 17:37:50 +01:00
Markus Armbruster
c4f498fe85 qapi: Generators crash when --output-dir isn't given, fix
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:16 +02:00
Markus Armbruster
eddf817bd8 qapi: Simplify error reporting for array types
check_type() first checks and peels off the array type, then checks
the element type.  For two out of four error messages, it takes pains
to report errors for "array of T" instead of just T.  Odd.  Let's
examine the errors.

* Unknown element type, e.g.
  tests/qapi-schema/args-array-unknown.json:

      Member 'array' of 'data' for command 'oops' uses unknown type
      'array of NoSuchType'

  To make sense of this, you need to know that 'array of NoSuchType'
  refers to '[NoSuchType]'.  Easy enough.  However, simply reporting

      Member 'array' of 'data' for command 'oops' uses unknown type
      'NoSuchType'

  is at least as easy to understand.

* Element type's meta-type is inadmissible, e.g.
  tests/qapi-schema/returns-whitelist.json:

      'returns' for command 'no-way-this-will-get-whitelisted' cannot
      use built-in type 'array of int'

  'array of int' is technically not a built-in type, but that's
  pedantry.  However, simply reporting

      'returns' for command 'no-way-this-will-get-whitelisted' cannot
      use built-in type 'int'

  avoids the issue, and is at least as easy to understand.

* The remaining two errors are unreachable, because the array checking
  ensures that value is a string.

Thus, reporting some errors for "array of T" instead of just T works,
but doesn't really improve things.  Drop it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:16 +02:00
Markus Armbruster
c6b71e5ae7 qapi: Fix errors for non-string, non-dictionary members
Fixes the errors demonstrated by the previous commit.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:16 +02:00
Markus Armbruster
65fbe12545 qapi: Drop one of two "simple union must not have base" checks
The first check ensures the second one can't trigger.  Drop the first
one, because the second one is in a more logical place, and emits a
nicer error message.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:16 +02:00
Markus Armbruster
3a864e7c52 qapi: Generated code cleanup
Clean up white-space, brace placement, and superfluous #ifdef
QAPI_TYPES_BUILTIN_CLEANUP_DEF.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:16 +02:00
Markus Armbruster
3f99144cd9 qapi-commands: Drop useless initialization
In generated command handlers, the assignment to retval dominates its
only use.  Therefore, its initialization is useless.  Drop it.

Suggested-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:15 +02:00
Markus Armbruster
1f9a7a1a58 qapi-commands: Don't feed output of mcgen() to mcgen() again
Multiple passes through mcgen() is prone to produce unwanted blank
lines, which we then combat by sprinkling .rstrip() on top.  Just
don't do it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:15 +02:00
Markus Armbruster
e02bca281c qapi-commands: Inline gen_marshal_output_call()
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:15 +02:00
Markus Armbruster
8102307f51 qapi-commands: Fix gen_err_check(e) for e and e != 'local_err'
gen_err_check() hard-codes 'local_err' instead of substituting the
argument.  Currently harmless, since all callers pass either None or
'local_err'.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:15 +02:00
Markus Armbruster
9b090d42ae qapi: Command returning anonymous type doesn't work, outlaw
Reproducer: with

    { 'command': 'user_def_cmd4', 'returns': { 'a': 'int' } }

added to qapi-schema-test.json, qapi-commands.py dies when it tries to
generate the command handler function

    Traceback (most recent call last):
      File "/work/armbru/qemu/scripts/qapi-commands.py", line 359, in <module>
        ret = generate_command_decl(cmd['command'], arglist, ret_type) + "\n"
      File "/work/armbru/qemu/scripts/qapi-commands.py", line 29, in generate_command_decl
        ret_type=c_type(ret_type), name=c_name(name),
      File "/work/armbru/qemu/scripts/qapi.py", line 927, in c_type
        assert isinstance(value, str) and value != ""
    AssertionError

because the return type doesn't exist.

Simply outlaw this usage, and drop or dumb down test cases accordingly.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:15 +02:00
Markus Armbruster
315932b5ed qapi: Fix to reject union command and event arguments
A command's or event's 'data' must be a struct type, given either as a
dictionary, or as struct type name.

Commit dd883c6 tightened the checking there, but not enough: we still
accept 'union'.  Fix to reject it.

We may want to support union types there, but we'll have to extend
qapi-commands.py and qapi-events.py for it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:15 +02:00
Markus Armbruster
d90675fa4b qapi: Document flaws in checking of names
We don't actually enforce our "other than downstream extensions [...],
all names should begin with a letter" rule.  Add a FIXME.

We should reject names that differ only in '_' vs. '.'  vs. '-',
because they're liable to clash in generated C.  Add a FIXME.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:14 +02:00
Eric Blake
ca56a822dd qapi: Document shortcoming with union 'data' branch
Add a FIXME to remind us to fully audit whether removing the
'void *data' branch of each qapi union type can be done safely.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1438297637-26789-1-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-09-04 15:47:14 +02:00
Eric Blake
2f52e20597 qapi: Document that input visitor semantics are prone to leaks
Most functions that can return a pointer or set an Error ** value
are decent enough to guarantee a NULL return when reporting an error.
Not so with our generated qapi visitor functions.  If the caller
is not careful to clean up partially-allocated objects on error,
then the caller suffers a memory leak.

Properly fixing it is probably complex enough to save for a later
day, so merely document it for now.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1438295587-19069-1-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-09-04 15:47:14 +02:00
Markus Armbruster
40b3adec13 qapi-visit: Fix two name arguments passed to visitors
The generated code passes mangled schema names to visit_type_enum()
and union's visit_start_struct().  Fix it to pass the names
unadulterated, like we do everywhere else.

Only qapi-schema-test.json actually has names where this makes a
difference: enum __org.qemu_x-Enum, flat union __org.qemu_x-Union2,
simple union __org.qemu_x-Union1 and its implicit enum
__org.qemu_x-Union1Kind.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:14 +02:00
Markus Armbruster
8c07eddc61 qapi-visit: Replace list implicit_structs by set
Use set because that's what it is.  While there, rename to
implicit_structs_seen.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:14 +02:00
Markus Armbruster
8c3f8e7721 qapi-visit: Fix generated code when schema has forward refs
The visit_type_implicit_FOO() are generated on demand, right before
their first use.  Used by visit_type_STRUCT_fields() when STRUCT has
base FOO, and by visit_type_UNION() when flat UNION has member a FOO.

If the schema defines FOO after its first use as struct base or flat
union member, visit_type_implicit_FOO() calls
visit_type_implicit_FOO() before its definition, which doesn't
compile.

Rearrange qapi-schema-test.json to demonstrate the bug.

Fix by generating the necessary forward declaration.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:13 +02:00
Markus Armbruster
1e6c1616a9 qapi: Generate a nicer struct for flat unions
The struct generated for a flat union is weird: the members of its
base are at the end, except for the union tag, which is at the
beginning.

Example: qapi-schema-test.json has

    { 'struct': 'UserDefUnionBase',
      'data': { 'string': 'str', 'enum1': 'EnumOne' } }

    { 'union': 'UserDefFlatUnion',
      'base': 'UserDefUnionBase',
      'discriminator': 'enum1',
      'data': { 'value1' : 'UserDefA',
                'value2' : 'UserDefB',
                'value3' : 'UserDefB' } }

We generate:

    struct UserDefFlatUnion
    {
        EnumOne enum1;
        union {
            void *data;
            UserDefA *value1;
            UserDefB *value2;
            UserDefB *value3;
        };
        char *string;
    };

Change to put all base members at the beginning, unadulterated.  Not
only is this easier to understand, it also permits casting the flat
union to its base, if that should become useful.

We now generate:

    struct UserDefFlatUnion
    {
        /* Members inherited from UserDefUnionBase: */
        char *string;
        EnumOne enum1;
        /* Own members: */
        union { /* union tag is @enum1 */
            void *data;
            UserDefA *value1;
            UserDefB *value2;
            UserDefB *value3;
        };
    };

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:13 +02:00
Markus Armbruster
0f61af3eb3 qapi: Fix generated code when flat union has member 'kind'
A flat union's tag member gets renamed to 'kind' in the generated
code.  Breaks when another member named 'kind' exists.

Example, adapted from qapi-schema-test.json:

    { 'struct': 'UserDefUnionBase',
      'data': { 'kind': 'str', 'enum1': 'EnumOne' } }

We generate:

    struct UserDefFlatUnion
    {
        EnumOne kind;
        union {
            void *data;
            UserDefA *value1;
            UserDefB *value2;
            UserDefB *value3;
        };
        char *kind;
    };

Kill the silly rename.

Reported-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:13 +02:00
Markus Armbruster
5aa05d3f72 qapi: Drop unused and useless parameters and variables
gen_sync_call()'s parameter indent is useless: gen_sync_call() uses it
only as optional argument for push_indent() and pop_indent(), their
default is four, and gen_sync_call()'s only caller passes four.  Drop
the parameter.

gen_visitor_input_containers_decl()'s parameter obj is always
"QOBJECT(args)".  Use that, and drop the parameter.

Drop unused parameters of gen_marshal_output(),
gen_marshal_input_decl(), generate_visit_struct_body(),
generate_visit_list(), generate_visit_enum(), generate_declaration(),
generate_enum_declaration(), generate_decl_enum().

Drop unused variables in generate_event_enum_lookup(),
generate_enum_lookup(), generate_visit_struct_fields(), check_event().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:13 +02:00
Markus Armbruster
1cf47a15f1 qapi: Reject -p arguments that break qapi-event.py
qapi-event.py breaks when you ask for a funny prefix like '@'.
Protect it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:13 +02:00
Markus Armbruster
016a335bd8 qapi-event: Clean up how name of enum QAPIEvent is made
Use c_name() instead of ad hoc code.  Doesn't upcase the -p prefix,
which is an improvement in my book.  Unbreaks prefix containing '.',
but other funny characters remain broken.  To be fixed next.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:13 +02:00
Markus Armbruster
00dfc3b2c2 qapi: Simplify guardname()
The guards around built-in declarations lose their _H.  It never made
much sense anyway.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:13 +02:00
Markus Armbruster
77e703b861 qapi: Clean up cgen() and mcgen()
Commit 05dfb26 added eatspace stripping to mcgen().  Move it to
cgen(), just in case somebody gets tempted to use cgen() directly
instead of via mcgen().

cgen() indents blank lines.  No such lines get generated right now,
but fix it anyway.

We use triple-quoted strings for program text, like this:

    '''
    Program text
    any number of lines
    '''

Keeps the program text relatively readable, but puts an extra newline
at either end.  mcgen() "fixes" that by dropping the first and last
line outright.  Drop only the newlines.

This unmasks a bug in qapi-commands.py: four quotes instead of three.
Fix it up.

Output doesn't change

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-09-04 15:47:13 +02:00