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-rw-r--r--runtime/sdt.h146
1 files changed, 47 insertions, 99 deletions
diff --git a/runtime/sdt.h b/runtime/sdt.h
index 905074ad..f09d4346 100644
--- a/runtime/sdt.h
+++ b/runtime/sdt.h
@@ -18,7 +18,9 @@
#define STAP_SENTINEL 0x31425250
-#define STAP_PROBE_STRUCT(probe,type,argc) \
+// g++ 4.3.2 doesn't emit DW_TAG_label
+#ifdef __cplusplus
+#define STAP_PROBE_STRUCT(probe,argc) \
struct _probe_ ## probe \
{ \
int probe_type; \
@@ -29,92 +31,68 @@ static char probe ## _ ## probe_name [strlen(#probe)+1] \
__attribute__ ((section (".probes"))) \
= #probe; \
static volatile struct _probe_ ## probe _probe_ ## probe __attribute__ ((section (".probes"))) = {STAP_SENTINEL,(size_t)& probe ## _ ## probe_name[0],argc};
+#else
+#define STAP_PROBE_STRUCT(probe,argc)
+#endif
+
+#ifdef __cplusplus
+#define STAP_LABEL_REF(probe) \
+ if (__builtin_expect(_probe_ ## probe.probe_type < 0, 0)) \
+ goto STAP_LABEL(probe,__LINE__);
+#else
+#define STAP_LABEL_REF(probe) \
+ volatile static int sentinel_ ## probe = 0; \
+ if (__builtin_expect(sentinel_ ## probe < 0, 0)) \
+ goto STAP_LABEL(probe,__LINE__);
+#endif
#define STAP_CONCAT(a,b) a ## b
#define STAP_LABEL(p,n) \
STAP_CONCAT(_stapprobe1_ ## 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__): \
+ { \
+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
+ STAP_PROBE_STRUCT(probe,(size_t)&& STAP_LABEL(probe,__LINE__)) \
+ STAP_LABEL_REF(probe) \
+}
-#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" :: "g"(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
+ asm volatile ("nop /* %0 */" :: "g"( arg1)); \
+ STAP_PROBE_STRUCT(probe,(size_t)&& STAP_LABEL(probe,__LINE__)) \
+ STAP_LABEL_REF(probe);}
-#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" :: "g"(arg1), "g"(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
+ asm volatile ("nop /* %0 %1 */" :: "g"(arg1), "g"(arg2)); \
+ STAP_PROBE_STRUCT(probe,(size_t)&& STAP_LABEL(probe,__LINE__)) \
+ STAP_LABEL_REF(probe);}
-#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" :: "g"(arg1), "g"(arg2), "g"(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
+ asm volatile ("nop /* %0 %1 %2 */" :: "g"(arg1), "g"(arg2), "g"(arg3)); \
+ STAP_PROBE_STRUCT(probe,(size_t)&& STAP_LABEL(probe,__LINE__)) \
+ STAP_LABEL_REF(probe);}
-#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" :: "g"(arg1), "g"(arg2), "g"(arg3), "g"(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
+ asm volatile ("nop /* %0 %1 %2 %3 */" :: "g"(arg1), "g"(arg2), "g"(arg3), "g"(arg4)); \
+ STAP_PROBE_STRUCT(probe,(size_t)&& STAP_LABEL(probe,__LINE__)) \
+ STAP_LABEL_REF(probe);}
-#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; \
@@ -122,17 +100,10 @@ STAP_LABEL(probe,__LINE__): \
volatile typeof((parm4)) arg4 __attribute__ ((unused)) = parm4; \
volatile typeof((parm5)) arg5 __attribute__ ((unused)) = parm5; \
STAP_LABEL(probe,__LINE__): \
- asm volatile ("nop" :: "g"(arg1), "g"(arg2), "g"(arg3), "g"(arg4), "g"(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
+ asm volatile ("nop /* %0 %1 %2 %3 %4 */" :: "g"(arg1), "g"(arg2), "g"(arg3), "g"(arg4), "g"(arg5)); \
+ STAP_PROBE_STRUCT(probe,(size_t)&& STAP_LABEL(probe,__LINE__)) \
+ STAP_LABEL_REF(probe);}
-#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; \
@@ -142,16 +113,9 @@ STAP_LABEL(probe,__LINE__): \
volatile typeof((parm6)) arg6 __attribute__ ((unused)) = parm6; \
STAP_LABEL(probe,__LINE__): \
asm volatile ("nop" :: "g"(arg1), "g"(arg2), "g"(arg3), "g"(arg4), "g"(arg5), "g"(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
+ STAP_PROBE_STRUCT(probe,(size_t)&& STAP_LABEL(probe,__LINE__)) \
+ STAP_LABEL_REF(probe);}
-#ifdef USE_STAP_PROBE
-#define STAP_PROBE7(provider,probe,arg1,arg2,arg3,arg4,arg5,arg6,arg7) \
- STAP_PROBE_STRUCT(probe,0,7) \
- _stap_probe_7 (_probe_ ## probe.probe_name,(size_t)arg1,(size_t)arg2,(size_t)arg3,(size_t)arg4,(size_t)arg5,(size_t)arg6,(size_t)arg7);
-#else
#define STAP_PROBE7(provider,probe,parm1,parm2,parm3,parm4,parm5,parm6,parm7) \
{volatile typeof((parm1)) arg1 __attribute__ ((unused)) = parm1; \
volatile typeof((parm2)) arg2 __attribute__ ((unused)) = parm2; \
@@ -162,16 +126,9 @@ STAP_LABEL(probe,__LINE__): \
volatile typeof((parm7)) arg7 __attribute__ ((unused)) = parm7; \
STAP_LABEL(probe,__LINE__): \
asm volatile ("nop" :: "g"(arg1), "g"(arg2), "g"(arg3), "g"(arg4), "g"(arg5), "g"(arg6), "g"(arg7)); \
- 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
+ STAP_PROBE_STRUCT(probe,(size_t)&& STAP_LABEL(probe,__LINE__)) \
+ STAP_LABEL_REF(probe);}
-#ifdef USE_STAP_PROBE
-#define STAP_PROBE8(provider,probe,arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8) \
- STAP_PROBE_STRUCT(probe,0,8) \
- _stap_probe_8 (_probe_ ## probe.probe_name,(size_t)arg1,(size_t)arg2,(size_t)arg3,(size_t)arg4,(size_t)arg5,(size_t)arg6,(size_t)arg7,(size_t)arg8);
-#else
#define STAP_PROBE8(provider,probe,parm1,parm2,parm3,parm4,parm5,parm6,parm7,parm8) \
{volatile typeof((parm1)) arg1 __attribute__ ((unused)) = parm1; \
volatile typeof((parm2)) arg2 __attribute__ ((unused)) = parm2; \
@@ -183,16 +140,9 @@ STAP_LABEL(probe,__LINE__): \
volatile typeof((parm8)) arg8 __attribute__ ((unused)) = parm8; \
STAP_LABEL(probe,__LINE__): \
asm volatile ("nop" :: "g"(arg1), "g"(arg2), "g"(arg3), "g"(arg4), "g"(arg5), "g"(arg6), "g"(arg7), "g"(arg8)); \
- 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
+ STAP_PROBE_STRUCT(probe,(size_t)&& STAP_LABEL(probe,__LINE__)) \
+ STAP_LABEL_REF(probe);}
-#ifdef USE_STAP_PROBE
-#define STAP_PROBE9(provider,probe,arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8,arg9) \
- STAP_PROBE_STRUCT(probe,0,9) \
- _stap_probe_9 (_probe_ ## probe.probe_name,(size_t)arg1,(size_t)arg2,(size_t)arg3,(size_t)arg4,(size_t)arg5,(size_t)arg6,(size_t)arg7,(size_t)arg8,(size_t)arg9);
-#else
#define STAP_PROBE9(provider,probe,parm1,parm2,parm3,parm4,parm5,parm6,parm7,parm8,parm9) \
{volatile typeof((parm1)) arg1 __attribute__ ((unused)) = parm1; \
volatile typeof((parm2)) arg2 __attribute__ ((unused)) = parm2; \
@@ -202,15 +152,13 @@ STAP_LABEL(probe,__LINE__): \
volatile typeof((parm6)) arg6 __attribute__ ((unused)) = parm6; \
volatile typeof((parm7)) arg7 __attribute__ ((unused)) = parm7; \
volatile typeof((parm8)) arg8 __attribute__ ((unused)) = parm8; \
- volatile typeof((parm9)) arg9 __attribute__ ((unused)) = parm9; \
+ volatile typeof((parm9)) arg9 __attribute__ ((unused() = parm9; \
STAP_LABEL(probe,__LINE__): \
asm volatile ("nop" :: "g"(arg1), "g"(arg2), "g"(arg3), "g"(arg4), "g"(arg5), "g"(arg6), "g"(arg7), "g"(arg8), "g"(arg9)); \
- 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
+ STAP_PROBE_STRUCT(probe,(size_t)&& STAP_LABEL(probe,__LINE__)) \
+ STAP_LABEL_REF(probe);}
-#define DTRACE_PROBE(provider,probe) \
+#define DTRACE_PROBE(__LINE__) \
STAP_PROBE(provider,probe)
#define DTRACE_PROBE1(provider,probe,parm1) \
STAP_PROBE1(provider,probe,parm1)
generated by cgit (git 2.34.1) at 2025-08-04 22:17:22 +0000