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dtracy: get rid of DTName struct, support more than three parts in a probe name, wildcard matching

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This commit is contained in:
aiju 2018-12-13 10:42:49 +00:00
parent dae5a44111
commit c7304ea03c
9 changed files with 207 additions and 111 deletions
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23
sys/include/dtracy.h
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@ -18,7 +18,6 @@ enum {
};
#define DTANIL ((u32int)-1)
typedef struct DTName DTName;
typedef struct DTProbe DTProbe;
typedef struct DTExprState DTExprState;
typedef struct DTAct DTAct;
@ -32,12 +31,6 @@ typedef struct DTAgg DTAgg;
typedef struct DTBuf DTBuf;
typedef struct DTTrigInfo DTTrigInfo;
struct DTName {
char *provider;
char *function;
char *name;
};
/*
we assign all pairs (probe,action-group) (called an enabling or DTEnab) a unique ID called EPID.
we could also use probe IDs and action group IDs but using a single 32-bit ID for both is more flexible/efficient.
@ -55,7 +48,7 @@ struct DTEnab {
/* probes are never freed */
struct DTProbe {
int nenable;
DTName;
char *name;
DTEnab enablist;
DTProvider *prov;
void *aux; /* for the provider */
@ -65,17 +58,16 @@ struct DTProbe {
struct DTProvider {
char *name;
/*
provide() is called when the user asks for a probe that doesn't exist.
provide() is called when the user first uses a provider.
provide() should call dtpnew() to create probes.
it can use the DTName as a hint or just create all probes that it knows about.
the provider has to ensure not to create the same probe multiple times.
*/
void (*provide)(DTProvider *, DTName);
void (*provide)(DTProvider *);
int (*enable)(DTProbe *); /* enable the probe. return >= 0 for success and < 0 for failure */
void (*disable)(DTProbe *); /* disable the probe */
/* for the library, not the provider */
DTProbe *probes;
int provided;
};
/*
@ -246,8 +238,9 @@ void dtinit(int);
void dtsync(void);
/* probe functions */
DTProbe *dtpnew(DTName, DTProvider *, void *aux);
int dtpmatch(DTName, DTProbe ***);
DTProbe *dtpnew(char *, DTProvider *, void *aux);
int dtpmatch(char *, DTProbe ***);
int dtplist(DTProbe ***);
void dtptrigger(DTProbe *, int, DTTrigInfo *);
/* expression functions */
@ -269,7 +262,7 @@ void dtclfree(DTClause *);
/* chan functions */
DTChan *dtcnew(void);
void dtcfree(DTChan *);
int dtcaddgr(DTChan *, DTName, DTActGr *);
int dtcaddgr(DTChan *, char *, DTActGr *);
int dtcaddcl(DTChan *, DTClause *);
int dtcread(DTChan *, void *, int);
int dtcaggread(DTChan *, void *, int);