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Add callchain parsing to -lpmc.

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Sponsored by:	FreeBSD Foundation and Google Inc.
This commit is contained in:
jkoshy 2007-12-03 11:15:46 +00:00
parent 8304a663db
commit 86277bac23
2 changed files with 36 additions and 4 deletions
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25
lib/libpmc/pmclog.c
View File

@ -1,7 +1,11 @@
/*-
* Copyright (c) 2005-2006 Joseph Koshy
* Copyright (c) 2005-2007 Joseph Koshy
* Copyright (c) 2007 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by A. Joseph Koshy under
* sponsorship from the FreeBSD Foundation and Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@ -270,7 +274,7 @@ pmclog_get_event(void *cookie, char **data, ssize_t *len,
struct pmclog_ev *ev)
{
int evlen, pathlen;
uint32_t h, *le;
uint32_t h, *le, npc;
enum pmclog_parser_state e;
struct pmclog_parse_state *ps;
@ -310,7 +314,22 @@ pmclog_get_event(void *cookie, char **data, ssize_t *len,
goto error; \
} while (0)
#define PMCLOG_GET_CALLCHAIN_SIZE(SZ,E) do { \
(SZ) = ((E) - offsetof(struct pmclog_callchain, pl_pc)) \
/ sizeof(uintfptr_t); \
} while (0);
switch (ev->pl_type = PMCLOG_HEADER_TO_TYPE(h)) {
case PMCLOG_TYPE_CALLCHAIN:
PMCLOG_READ32(le,ev->pl_u.pl_cc.pl_pid);
PMCLOG_READ32(le,ev->pl_u.pl_cc.pl_pmcid);
PMCLOG_READ32(le,ev->pl_u.pl_cc.pl_cpuflags);
PMCLOG_GET_CALLCHAIN_SIZE(ev->pl_u.pl_cc.pl_npc,evlen);
for (npc = 0; npc < ev->pl_u.pl_cc.pl_npc; npc++)
PMCLOG_READADDR(le,ev->pl_u.pl_cc.pl_pc[npc]);
for (;npc < PMC_CALLCHAIN_DEPTH_MAX; npc++)
ev->pl_u.pl_cc.pl_pc[npc] = (uintfptr_t) 0;
break;
case PMCLOG_TYPE_CLOSELOG:
case PMCLOG_TYPE_DROPNOTIFY:
/* nothing to do */
@ -387,7 +406,7 @@ pmclog_get_event(void *cookie, char **data, ssize_t *len,
default: /* unknown record type */
ps->ps_state = PL_STATE_ERROR;
ev->pl_state = PMCLOG_ERROR;
return -1;
return (-1);
}
ev->pl_offset = (ps->ps_offset += evlen);

15
lib/libpmc/pmclog.h
View File

@ -1,7 +1,11 @@
/*-
* Copyright (c) 2005-2006 Joseph Koshy
* Copyright (c) 2005-2007 Joseph Koshy
* Copyright (c) 2007 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by A. Joseph Koshy under
* sponsorship from the FreeBSD Foundation and Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@ -38,6 +42,14 @@ enum pmclog_state {
PMCLOG_ERROR
};
struct pmclog_ev_callchain {
uint32_t pl_pid;
uint32_t pl_pmcid;
uint32_t pl_cpuflags;
uint32_t pl_npc;
uintfptr_t pl_pc[PMC_CALLCHAIN_DEPTH_MAX];
};
struct pmclog_ev_dropnotify {
};
@ -125,6 +137,7 @@ struct pmclog_ev {
struct timespec pl_ts; /* log entry timestamp */
enum pmclog_type pl_type; /* type of log entry */
union { /* log entry data */
struct pmclog_ev_callchain pl_cc;
struct pmclog_ev_closelog pl_cl;
struct pmclog_ev_dropnotify pl_dn;
struct pmclog_ev_initialize pl_i;