diff options
Diffstat (limited to 'runtime/sdt.h')
| -rw-r--r-- | runtime/sdt.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/runtime/sdt.h b/runtime/sdt.h new file mode 100644 index 00000000..9fe7b176 --- /dev/null +++ b/runtime/sdt.h @@ -0,0 +1,163 @@ +// Copyright (C) 2005-2009 Red Hat Inc. +// Copyright (C) 2006 Intel Corporation. +// +// This file is part of systemtap, and is free software. You can +// redistribute it and/or modify it under the terms of the GNU General +// Public License (GPL); either version 2, or (at your option) any +// later version. + +#include <string.h> + +#if _LP64 +#define STAP_PROBE_STRUCT_ARG(arg) \ + __uint64_t arg; +#else +#define STAP_PROBE_STRUCT_ARG(arg) \ + long arg __attribute__ ((aligned(8))); +#endif + +#define STAP_SENTINEL 0x31425250 + +#define STAP_PROBE_STRUCT(probe,type,argc) \ +struct _probe_ ## probe \ +{ \ + int probe_type; \ + char *probe_name; \ + STAP_PROBE_STRUCT_ARG (probe_arg); \ +}; \ +static char probe_name [strlen(#probe)+1] \ + __attribute__ ((section (".probes"))) \ + = #probe; \ +static volatile struct _probe_ ## probe _probe_ ## probe __attribute__ ((section (".probes"))) = {STAP_SENTINEL,&probe_name[0],argc}; + +#define STAP_CONCAT(a,b) a ## b +#define STAP_LABEL(p,n) \ + STAP_CONCAT(_probe_ ## p ## _, n) + +// The goto _probe_ prevents the label from "drifting" +#ifdef USE_STAP_PROBE +#define STAP_PROBE(provider,probe) \ + STAP_PROBE_STRUCT(probe,0,0) \ + _stap_probe_0 (_probe_ ## probe.probe_name); +#else +#define STAP_PROBE(provider,probe) \ +STAP_LABEL(probe,__LINE__): \ + asm volatile ("nop"); \ + STAP_PROBE_STRUCT(probe,1,(size_t)&& STAP_LABEL(probe,__LINE__)) \ + if (__builtin_expect(_probe_ ## probe.probe_type < 0, 0)) \ + goto STAP_LABEL(probe,__LINE__); +#endif + +#ifdef USE_STAP_PROBE +#define STAP_PROBE1(provider,probe,arg1) \ + STAP_PROBE_STRUCT(probe,0,1) \ + _stap_probe_1 (_probe_ ## probe.probe_name,(size_t)arg1); +#else +#define STAP_PROBE1(provider,probe,parm1) \ + {volatile typeof((parm1)) arg1 __attribute__ ((unused)) = parm1; \ +STAP_LABEL(probe,__LINE__): \ + asm volatile ("nop" :: "r"(arg1)); \ + STAP_PROBE_STRUCT(probe,1,(size_t)&& STAP_LABEL(probe,__LINE__)) \ + if (__builtin_expect(_probe_ ## probe.probe_type < 0, 0)) \ + goto STAP_LABEL(probe,__LINE__);} +#endif + +#ifdef USE_STAP_PROBE +#define STAP_PROBE2(provider,probe,arg1,arg2) \ + STAP_PROBE_STRUCT(probe,0,2) \ + _stap_probe_2 (_probe_ ## probe.probe_name,(size_t)arg1,(size_t)arg2); +#else +#define STAP_PROBE2(provider,probe,parm1,parm2) \ + {volatile typeof((parm1)) arg1 __attribute__ ((unused)) = parm1; \ + volatile typeof((parm2)) arg2 __attribute__ ((unused)) = parm2; \ +STAP_LABEL(probe,__LINE__): \ + asm volatile ("nop" :: "r"(arg1), "r"(arg2)); \ + STAP_PROBE_STRUCT(probe,1,(size_t)&& STAP_LABEL(probe,__LINE__)) \ + if (__builtin_expect(_probe_ ## probe.probe_type < 0, 0)) \ + goto STAP_LABEL(probe,__LINE__);} +#endif + +#ifdef USE_STAP_PROBE +#define STAP_PROBE3(provider,probe,arg1,arg2,arg3) \ + STAP_PROBE_STRUCT(probe,0,3) \ + _stap_probe_3 (_probe_ ## probe.probe_name,(size_t)arg1,(size_t)arg2,(size_t)arg3); +#else +#define STAP_PROBE3(provider,probe,parm1,parm2,parm3) \ + {volatile typeof((parm1)) arg1 __attribute__ ((unused)) = parm1; \ + volatile typeof((parm2)) arg2 __attribute__ ((unused)) = parm2; \ + volatile typeof((parm3)) arg3 __attribute__ ((unused)) = parm3; \ +STAP_LABEL(probe,__LINE__): \ + asm volatile ("nop" :: "r"(arg1), "r"(arg2), "r"(arg3)); \ + STAP_PROBE_STRUCT(probe,1,(size_t)&& STAP_LABEL(probe,__LINE__)) \ + if (__builtin_expect(_probe_ ## probe.probe_type < 0, 0)) \ + goto STAP_LABEL(probe,__LINE__);} +#endif + +#ifdef USE_STAP_PROBE +#define STAP_PROBE4(provider,probe,arg1,arg2,arg3,arg4) \ + STAP_PROBE_STRUCT(probe,0,4) \ + _stap_probe_4 (_probe_ ## probe.probe_name,(size_t)arg1,(size_t)arg2,(size_t)arg3,(size_t)arg4); +#else +#define STAP_PROBE4(provider,probe,parm1,parm2,parm3,parm4) \ + {volatile typeof((parm1)) arg1 __attribute__ ((unused)) = parm1; \ + volatile typeof((parm2)) arg2 __attribute__ ((unused)) = parm2; \ + volatile typeof((parm3)) arg3 __attribute__ ((unused)) = parm3; \ + volatile typeof((parm4)) arg4 __attribute__ ((unused)) = parm4; \ +STAP_LABEL(probe,__LINE__): \ + asm volatile ("nop" :: "r"(arg1), "r"(arg2), "r"(arg3), "r"(arg4)); \ + STAP_PROBE_STRUCT(probe,1,(size_t)&& STAP_LABEL(probe,__LINE__)) \ + if (__builtin_expect(_probe_ ## probe.probe_type < 0, 0)) \ + goto STAP_LABEL(probe,__LINE__);} +#endif + +#ifdef USE_STAP_PROBE +#define STAP_PROBE5(provider,probe,arg1,arg2,arg3,arg4,arg5) \ + STAP_PROBE_STRUCT(probe,0,5) \ + _stap_probe_5 (_probe_ ## probe.probe_name,(size_t)arg1,(size_t)arg2,(size_t)arg3,(size_t)arg4,(size_t)arg5); +#else +#define STAP_PROBE5(provider,probe,parm1,parm2,parm3,parm4,parm5) \ + {volatile typeof((parm1)) arg1 __attribute__ ((unused)) = parm1; \ + volatile typeof((parm2)) arg2 __attribute__ ((unused)) = parm2; \ + volatile typeof((parm3)) arg3 __attribute__ ((unused)) = parm3; \ + volatile typeof((parm4)) arg4 __attribute__ ((unused)) = parm4; \ + volatile typeof((parm5)) arg5 __attribute__ ((unused)) = parm5; \ +STAP_LABEL(probe,__LINE__): \ + asm volatile ("nop" :: "r"(arg1), "r"(arg2), "r"(arg3), "r"(arg4), "r"(arg5)); \ + STAP_PROBE_STRUCT(probe,1,(size_t)&& STAP_LABEL(probe,__LINE__)) \ + if (__builtin_expect(_probe_ ## probe.probe_type < 0, 0)) \ + goto STAP_LABEL(probe,__LINE__);} +#endif + +#ifdef USE_STAP_PROBE +#define STAP_PROBE6(provider,probe,arg1,arg2,arg3,arg4,arg5,arg6) \ + STAP_PROBE_STRUCT(probe,0,6) \ + _stap_probe_6 (_probe_ ## probe.probe_name,(size_t)arg1,(size_t)arg2,(size_t)arg3,(size_t)arg4,(size_t)arg5,(size_t)arg6); +#else +#define STAP_PROBE6(provider,probe,parm1,parm2,parm3,parm4,parm5,parm6) \ + {volatile typeof((parm1)) arg1 __attribute__ ((unused)) = parm1; \ + volatile typeof((parm2)) arg2 __attribute__ ((unused)) = parm2; \ + volatile typeof((parm3)) arg3 __attribute__ ((unused)) = parm3; \ + volatile typeof((parm4)) arg4 __attribute__ ((unused)) = parm4; \ + volatile typeof((parm5)) arg5 __attribute__ ((unused)) = parm5; \ + volatile typeof((parm6)) arg6 __attribute__ ((unused)) = parm6; \ +STAP_LABEL(probe,__LINE__): \ + asm volatile ("nop" :: "r"(arg1), "r"(arg2), "r"(arg3), "r"(arg4), "r"(arg5), "r"(arg6)); \ + STAP_PROBE_STRUCT(probe,1,(size_t)&& STAP_LABEL(probe,__LINE__)) \ + if (__builtin_expect(_probe_ ## probe.probe_type < 0, 0)) \ + goto STAP_LABEL(probe,__LINE__);} +#endif + +#define DTRACE_PROBE(provider,probe) \ +STAP_PROBE(provider,probe) +#define DTRACE_PROBE1(provider,probe,parm1) \ +STAP_PROBE1(provider,probe,parm1) +#define DTRACE_PROBE2(provider,probe,parm1,parm2) \ +STAP_PROBE2(provider,probe,parm1,parm2) +#define DTRACE_PROBE3(provider,probe,parm1,parm2,parm3) \ +STAP_PROBE3(provider,probe,parm1,parm2,parm3) +#define DTRACE_PROBE4(provider,probe,parm1,parm2,parm3,parm4) \ +STAP_PROBE4(provider,probe,parm1,parm2,parm3,parm4) +#define DTRACE_PROBE5(provider,probe,parm1,parm2,parm3,parm4,parm5) \ +STAP_PROBE4(provider,probe,parm1,parm2,parm3,parm4,parm5) +#define DTRACE_PROBE6(provider,probe,parm1,parm2,parm3,parm4,parm5,parm6) \ +STAP_PROBE4(provider,probe,parm1,parm2,parm3,parm4,parm5,parm6) |