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Move dtrace probe macros into separate header file

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The dtrace probe macros rely on the logging API. We can't make
the internal.h header include the virlog.h header though since
that'd be a circular include. Instead simply split the dtrace
probes into their own header file, since there's no compelling
reason for them to be in the main internal.h header.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrange 2014-02-27 13:41:11 +00:00
parent 3887c5d83b
commit b29275d928
13 changed files with 111 additions and 72 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
daemon/remote.c
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@ -52,6 +52,7 @@
#include "object_event.h" #include "object_event.h"
#include "domain_conf.h" #include "domain_conf.h"
#include "network_conf.h" #include "network_conf.h"
#include "virprobe.h"
#include "viraccessapicheck.h" #include "viraccessapicheck.h"
#define VIR_FROM_THIS VIR_FROM_RPC #define VIR_FROM_THIS VIR_FROM_RPC

72
src/internal.h
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@ -366,78 +366,6 @@
# define VIR_ROUND_UP(value, size) (VIR_DIV_UP(value, size) * (size)) # define VIR_ROUND_UP(value, size) (VIR_DIV_UP(value, size) * (size))
# if WITH_DTRACE_PROBES
# ifndef LIBVIRT_PROBES_H
# define LIBVIRT_PROBES_H
# include "libvirt_probes.h"
# endif /* LIBVIRT_PROBES_H */
/* Systemtap 1.2 headers have a bug where they cannot handle a
* variable declared with array type. Work around this by casting all
* arguments. This is some gross use of the preprocessor because
* PROBE is a var-arg macro, but it is better than the alternative of
* making all callers to PROBE have to be aware of the issues. And
* hopefully, if we ever add a call to PROBE with other than 9
* end arguments, you can figure out the pattern to extend this hack.
*/
# define VIR_COUNT_ARGS(...) VIR_ARG11(__VA_ARGS__, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1)
# define VIR_ARG11(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, ...) _11
# define VIR_ADD_CAST_EXPAND(a, b, ...) VIR_ADD_CAST_PASTE(a, b, __VA_ARGS__)
# define VIR_ADD_CAST_PASTE(a, b, ...) a##b(__VA_ARGS__)
/* The double cast is necessary to silence gcc warnings; any pointer
* can safely go to intptr_t and back to void *, which collapses
* arrays into pointers; while any integer can be widened to intptr_t
* then cast to void *. */
# define VIR_ADD_CAST(a) ((void *)(intptr_t)(a))
# define VIR_ADD_CAST1(a) \
VIR_ADD_CAST(a)
# define VIR_ADD_CAST2(a, b) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b)
# define VIR_ADD_CAST3(a, b, c) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c)
# define VIR_ADD_CAST4(a, b, c, d) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d)
# define VIR_ADD_CAST5(a, b, c, d, e) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d), VIR_ADD_CAST(e)
# define VIR_ADD_CAST6(a, b, c, d, e, f) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d), VIR_ADD_CAST(e), VIR_ADD_CAST(f)
# define VIR_ADD_CAST7(a, b, c, d, e, f, g) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d), VIR_ADD_CAST(e), VIR_ADD_CAST(f), \
VIR_ADD_CAST(g)
# define VIR_ADD_CAST8(a, b, c, d, e, f, g, h) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d), VIR_ADD_CAST(e), VIR_ADD_CAST(f), \
VIR_ADD_CAST(g), VIR_ADD_CAST(h)
# define VIR_ADD_CAST9(a, b, c, d, e, f, g, h, i) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d), VIR_ADD_CAST(e), VIR_ADD_CAST(f), \
VIR_ADD_CAST(g), VIR_ADD_CAST(h), VIR_ADD_CAST(i)
# define VIR_ADD_CASTS(...) \
VIR_ADD_CAST_EXPAND(VIR_ADD_CAST, VIR_COUNT_ARGS(__VA_ARGS__), \
__VA_ARGS__)
# define PROBE_EXPAND(NAME, ARGS) NAME(ARGS)
# define PROBE(NAME, FMT, ...) \
VIR_DEBUG_INT(VIR_LOG_FROM_TRACE, \
__FILE__, __LINE__, __func__, \
#NAME ": " FMT, __VA_ARGS__); \
if (LIBVIRT_ ## NAME ## _ENABLED()) { \
PROBE_EXPAND(LIBVIRT_ ## NAME, \
VIR_ADD_CASTS(__VA_ARGS__)); \
}
# else
# define PROBE(NAME, FMT, ...) \
VIR_DEBUG_INT(VIR_LOG_FROM_TRACE, \
__FILE__, __LINE__, __func__, \
#NAME ": " FMT, __VA_ARGS__);
# endif
/* Specific error values for use in forwarding programs such as /* Specific error values for use in forwarding programs such as
* virt-login-shell; these values match what GNU env does. */ * virt-login-shell; these values match what GNU env does. */
enum { enum {

1
src/qemu/qemu_monitor.c
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@ -40,6 +40,7 @@
#include "virfile.h" #include "virfile.h"
#include "virprocess.h" #include "virprocess.h"
#include "virobject.h" #include "virobject.h"
#include "virprobe.h"
#include "virstring.h" #include "virstring.h"
#ifdef WITH_DTRACE_PROBES #ifdef WITH_DTRACE_PROBES

1
src/qemu/qemu_monitor_json.c
View File

@ -41,6 +41,7 @@
#include "datatypes.h" #include "datatypes.h"
#include "virerror.h" #include "virerror.h"
#include "virjson.h" #include "virjson.h"
#include "virprobe.h"
#include "virstring.h" #include "virstring.h"
#include "cpu/cpu_x86.h" #include "cpu/cpu_x86.h"

1
src/qemu/qemu_monitor_text.c
View File

@ -40,6 +40,7 @@
#include "datatypes.h" #include "datatypes.h"
#include "virerror.h" #include "virerror.h"
#include "virbuffer.h" #include "virbuffer.h"
#include "virprobe.h"
#include "virstring.h" #include "virstring.h"
#ifdef WITH_DTRACE_PROBES #ifdef WITH_DTRACE_PROBES

1
src/rpc/virkeepalive.c
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@ -30,6 +30,7 @@
#include "virnetsocket.h" #include "virnetsocket.h"
#include "virkeepaliveprotocol.h" #include "virkeepaliveprotocol.h"
#include "virkeepalive.h" #include "virkeepalive.h"
#include "virprobe.h"
#define VIR_FROM_THIS VIR_FROM_RPC #define VIR_FROM_THIS VIR_FROM_RPC

1
src/rpc/virnetclient.c
View File

@ -36,6 +36,7 @@
#include "virlog.h" #include "virlog.h"
#include "virutil.h" #include "virutil.h"
#include "virerror.h" #include "virerror.h"
#include "virprobe.h"
#include "virstring.h" #include "virstring.h"
#define VIR_FROM_THIS VIR_FROM_RPC #define VIR_FROM_THIS VIR_FROM_RPC

1
src/rpc/virnetserverclient.c
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@ -35,6 +35,7 @@
#include "viralloc.h" #include "viralloc.h"
#include "virthread.h" #include "virthread.h"
#include "virkeepalive.h" #include "virkeepalive.h"
#include "virprobe.h"
#include "virstring.h" #include "virstring.h"
#include "virutil.h" #include "virutil.h"

1
src/rpc/virnetsocket.c
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@ -51,6 +51,7 @@
#include "virlog.h" #include "virlog.h"
#include "virfile.h" #include "virfile.h"
#include "virthread.h" #include "virthread.h"
#include "virprobe.h"
#include "virprocess.h" #include "virprocess.h"
#include "virstring.h" #include "virstring.h"
#include "passfd.h" #include "passfd.h"

1
src/rpc/virnettlscontext.c
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@ -39,6 +39,7 @@
#include "virfile.h" #include "virfile.h"
#include "virutil.h" #include "virutil.h"
#include "virlog.h" #include "virlog.h"
#include "virprobe.h"
#include "virthread.h" #include "virthread.h"
#include "configmake.h" #include "configmake.h"

1
src/util/vireventpoll.c
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@ -38,6 +38,7 @@
#include "virutil.h" #include "virutil.h"
#include "virfile.h" #include "virfile.h"
#include "virerror.h" #include "virerror.h"
#include "virprobe.h"
#include "virtime.h" #include "virtime.h"
#define EVENT_DEBUG(fmt, ...) VIR_DEBUG(fmt, __VA_ARGS__) #define EVENT_DEBUG(fmt, ...) VIR_DEBUG(fmt, __VA_ARGS__)

1
src/util/virobject.c
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@ -28,6 +28,7 @@
#include "viratomic.h" #include "viratomic.h"
#include "virerror.h" #include "virerror.h"
#include "virlog.h" #include "virlog.h"
#include "virprobe.h"
#include "virstring.h" #include "virstring.h"
#define VIR_FROM_THIS VIR_FROM_NONE #define VIR_FROM_THIS VIR_FROM_NONE

100
src/util/virprobe.h Normal file
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@ -0,0 +1,100 @@
/*
* virprobe.h: dynamic operation tracing
*
* Copyright (C) 2006-2014 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#ifndef __VIR_PROBE_H__
# define __VIR_PROBE_H__
# include "internal.h"
# include "virlog.h"
# if WITH_DTRACE_PROBES
# ifndef LIBVIRT_PROBES_H
# define LIBVIRT_PROBES_H
# include "libvirt_probes.h"
# endif /* LIBVIRT_PROBES_H */
/* Systemtap 1.2 headers have a bug where they cannot handle a
* variable declared with array type. Work around this by casting all
* arguments. This is some gross use of the preprocessor because
* PROBE is a var-arg macro, but it is better than the alternative of
* making all callers to PROBE have to be aware of the issues. And
* hopefully, if we ever add a call to PROBE with other than 9
* end arguments, you can figure out the pattern to extend this hack.
*/
# define VIR_COUNT_ARGS(...) VIR_ARG11(__VA_ARGS__, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1)
# define VIR_ARG11(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, ...) _11
# define VIR_ADD_CAST_EXPAND(a, b, ...) VIR_ADD_CAST_PASTE(a, b, __VA_ARGS__)
# define VIR_ADD_CAST_PASTE(a, b, ...) a##b(__VA_ARGS__)
/* The double cast is necessary to silence gcc warnings; any pointer
* can safely go to intptr_t and back to void *, which collapses
* arrays into pointers; while any integer can be widened to intptr_t
* then cast to void *. */
# define VIR_ADD_CAST(a) ((void *)(intptr_t)(a))
# define VIR_ADD_CAST1(a) \
VIR_ADD_CAST(a)
# define VIR_ADD_CAST2(a, b) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b)
# define VIR_ADD_CAST3(a, b, c) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c)
# define VIR_ADD_CAST4(a, b, c, d) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d)
# define VIR_ADD_CAST5(a, b, c, d, e) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d), VIR_ADD_CAST(e)
# define VIR_ADD_CAST6(a, b, c, d, e, f) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d), VIR_ADD_CAST(e), VIR_ADD_CAST(f)
# define VIR_ADD_CAST7(a, b, c, d, e, f, g) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d), VIR_ADD_CAST(e), VIR_ADD_CAST(f), \
VIR_ADD_CAST(g)
# define VIR_ADD_CAST8(a, b, c, d, e, f, g, h) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d), VIR_ADD_CAST(e), VIR_ADD_CAST(f), \
VIR_ADD_CAST(g), VIR_ADD_CAST(h)
# define VIR_ADD_CAST9(a, b, c, d, e, f, g, h, i) \
VIR_ADD_CAST(a), VIR_ADD_CAST(b), VIR_ADD_CAST(c), \
VIR_ADD_CAST(d), VIR_ADD_CAST(e), VIR_ADD_CAST(f), \
VIR_ADD_CAST(g), VIR_ADD_CAST(h), VIR_ADD_CAST(i)
# define VIR_ADD_CASTS(...) \
VIR_ADD_CAST_EXPAND(VIR_ADD_CAST, VIR_COUNT_ARGS(__VA_ARGS__), \
__VA_ARGS__)
# define PROBE_EXPAND(NAME, ARGS) NAME(ARGS)
# define PROBE(NAME, FMT, ...) \
VIR_DEBUG_INT(VIR_LOG_FROM_TRACE, \
NULL, __LINE__, __func__, \
#NAME ": " FMT, __VA_ARGS__); \
if (LIBVIRT_ ## NAME ## _ENABLED()) { \
PROBE_EXPAND(LIBVIRT_ ## NAME, \
VIR_ADD_CASTS(__VA_ARGS__)); \
}
# else
# define PROBE(NAME, FMT, ...) \
VIR_DEBUG_INT(VIR_LOG_FROM_TRACE, \
NULL, __LINE__, __func__, \
#NAME ": " FMT, __VA_ARGS__);
# endif
#endif /* __VIR_PROBE_H__ */