/
beam_bp.c
1361 lines (1175 loc) · 34 KB
/
beam_bp.c
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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2000-2010. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "sys.h"
#include "erl_vm.h"
#include "global.h"
#include "erl_process.h"
#include "beam_load.h"
#include "bif.h"
#include "error.h"
#include "erl_binary.h"
#include "beam_bp.h"
#include "erl_term.h"
/* *************************************************************************
** Macros
*/
/*
** Memory allocation macros
*/
/* Breakpoint data */
#define Alloc(SZ) erts_alloc(ERTS_ALC_T_BPD, (SZ))
#define ReAlloc(P, SIZ) erts_realloc(ERTS_ALC_T_BPD, (P), (SZ))
#define Free(P) erts_free(ERTS_ALC_T_BPD, (P))
/*
** Doubly linked ring macros
*/
#define BpInit(a,i) \
do { \
(a)->orig_instr = (i); \
(a)->next = (a); \
(a)->prev = (a); \
} while (0)
#define BpSpliceNext(a,b) \
do { \
register BpData *c = (a), *d = (b), *e; \
e = c->next->prev; \
c->next->prev = d->next->prev; \
d->next->prev = e; \
e = c->next; \
c->next = d->next; \
d->next = e; \
} while (0)
#define BpSplicePrev(a,b) \
do { \
register BpData *c = (a), *d = (b), *e; \
e = c->prev->next; \
c->prev->next = d->prev->next; \
d->prev->next = e; \
e = c->prev; \
c->prev = d->prev; \
d->prev = e; \
} while (0)
#ifdef DEBUG
# define BpSingleton(a) ((a)->next == (a) && (a)->prev == (a))
#else
# define BpSingleton(a) ((a)->next == (a))
#endif
#define BpInitAndSpliceNext(a,i,b) \
do { \
(a)->orig_instr = (i); \
(a)->prev = (b); \
(b)->next->prev = (a); \
(a)->next = (b)->next; \
(b)->next = (a); \
} while (0)
#define BpInitAndSplicePrev(a,i,b) \
do { \
(a)->orig_instr = (i); \
(a)->next = (b); \
(b)->prev->next = (a); \
(a)->prev = (b)->prev; \
(b)->prev = (a); \
} while (0)
/* *************************************************************************
** Local prototypes
*/
/*
** Helpers
*/
static int set_break(Eterm mfa[3], int specified,
Binary *match_spec, BeamInstr break_op,
enum erts_break_op count_op, Eterm tracer_pid);
static int set_module_break(Module *modp, Eterm mfa[3], int specified,
Binary *match_spec, BeamInstr break_op,
enum erts_break_op count_op, Eterm tracer_pid);
static int set_function_break(Module *modp, BeamInstr *pc,
Binary *match_spec, BeamInstr break_op,
enum erts_break_op count_op, Eterm tracer_pid);
static int clear_break(Eterm mfa[3], int specified,
BeamInstr break_op);
static int clear_module_break(Module *modp, Eterm mfa[3], int specified,
BeamInstr break_op);
static int clear_function_break(Module *modp, BeamInstr *pc,
BeamInstr break_op);
static BpData *is_break(BeamInstr *pc, BeamInstr break_op);
static BpData *get_break(Process *p, BeamInstr *pc, BeamInstr break_op);
/* bp_hash */
#define BP_TIME_ADD(pi0, pi1) \
do { \
Uint r; \
(pi0)->count += (pi1)->count; \
(pi0)->s_time += (pi1)->s_time; \
(pi0)->us_time += (pi1)->us_time; \
r = (pi0)->us_time / 1000000; \
(pi0)->s_time += r; \
(pi0)->us_time = (pi0)->us_time % 1000000; \
} while(0)
static void bp_hash_init(bp_time_hash_t *hash, Uint n);
static void bp_hash_rehash(bp_time_hash_t *hash, Uint n);
static ERTS_INLINE bp_data_time_item_t * bp_hash_get(bp_time_hash_t *hash, bp_data_time_item_t *sitem);
static ERTS_INLINE bp_data_time_item_t * bp_hash_put(bp_time_hash_t *hash, bp_data_time_item_t *sitem);
static void bp_hash_delete(bp_time_hash_t *hash);
/* *************************************************************************
** External interfaces
*/
erts_smp_spinlock_t erts_bp_lock;
void
erts_bp_init(void) {
erts_smp_spinlock_init(&erts_bp_lock, "breakpoints");
}
int
erts_set_trace_break(Eterm mfa[3], int specified, Binary *match_spec,
Eterm tracer_pid) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return set_break(mfa, specified, match_spec,
(BeamInstr) BeamOp(op_i_trace_breakpoint), 0, tracer_pid);
}
int
erts_set_mtrace_break(Eterm mfa[3], int specified, Binary *match_spec,
Eterm tracer_pid) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return set_break(mfa, specified, match_spec,
(BeamInstr) BeamOp(op_i_mtrace_breakpoint), 0, tracer_pid);
}
void
erts_set_mtrace_bif(BeamInstr *pc, Binary *match_spec, Eterm tracer_pid) {
BpDataTrace *bdt;
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
bdt = (BpDataTrace *) pc[-4];
if (bdt) {
MatchSetUnref(bdt->match_spec);
MatchSetRef(match_spec);
bdt->match_spec = match_spec;
bdt->tracer_pid = tracer_pid;
} else {
bdt = Alloc(sizeof(BpDataTrace));
BpInit((BpData *) bdt, 0);
MatchSetRef(match_spec);
bdt->match_spec = match_spec;
bdt->tracer_pid = tracer_pid;
pc[-4] = (BeamInstr) bdt;
}
}
int
erts_set_debug_break(Eterm mfa[3], int specified) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return set_break(mfa, specified, NULL,
(BeamInstr) BeamOp(op_i_debug_breakpoint), 0, NIL);
}
int
erts_set_count_break(Eterm mfa[3], int specified, enum erts_break_op count_op) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return set_break(mfa, specified, NULL,
(BeamInstr) BeamOp(op_i_count_breakpoint), count_op, NIL);
}
int
erts_set_time_break(Eterm mfa[3], int specified, enum erts_break_op count_op) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return set_break(mfa, specified, NULL,
(BeamInstr) BeamOp(op_i_time_breakpoint), count_op, NIL);
}
int
erts_clear_trace_break(Eterm mfa[3], int specified) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return clear_break(mfa, specified,
(BeamInstr) BeamOp(op_i_trace_breakpoint));
}
int
erts_clear_mtrace_break(Eterm mfa[3], int specified) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return clear_break(mfa, specified,
(BeamInstr) BeamOp(op_i_mtrace_breakpoint));
}
void
erts_clear_mtrace_bif(BeamInstr *pc) {
BpDataTrace *bdt;
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
bdt = (BpDataTrace *) pc[-4];
if (bdt) {
if (bdt->match_spec) {
MatchSetUnref(bdt->match_spec);
}
Free(bdt);
}
pc[-4] = (BeamInstr) NULL;
}
int
erts_clear_debug_break(Eterm mfa[3], int specified) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return clear_break(mfa, specified,
(BeamInstr) BeamOp(op_i_debug_breakpoint));
}
int
erts_clear_count_break(Eterm mfa[3], int specified) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return clear_break(mfa, specified,
(BeamInstr) BeamOp(op_i_count_breakpoint));
}
int
erts_clear_time_break(Eterm mfa[3], int specified) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return clear_break(mfa, specified,
(BeamInstr) BeamOp(op_i_time_breakpoint));
}
int
erts_clear_break(Eterm mfa[3], int specified) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
return clear_break(mfa, specified, 0);
}
int
erts_clear_module_break(Module *modp) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
ASSERT(modp);
return clear_module_break(modp, NULL, 0, 0);
}
int
erts_clear_function_break(Module *modp, BeamInstr *pc) {
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
ASSERT(modp);
return clear_function_break(modp, pc, 0);
}
/*
* SMP NOTE: Process p may have become exiting on return!
*/
BeamInstr
erts_trace_break(Process *p, BeamInstr *pc, Eterm *args,
Uint32 *ret_flags, Eterm *tracer_pid) {
Eterm tpid1, tpid2;
BpData **bds = (BpData **) (pc)[-4];
BpDataTrace *bdt = NULL;
ASSERT(bds);
ASSERT(pc[-5] == (BeamInstr) BeamOp(op_i_func_info_IaaI));
bdt = (BpDataTrace *) bds[bp_sched2ix_proc(p)];
ASSERT(bdt);
bdt = (BpDataTrace *) bdt->next;
ASSERT(bdt);
ASSERT(ret_flags);
ASSERT(tracer_pid);
ErtsSmpBPLock(bdt);
tpid1 = tpid2 = bdt->tracer_pid;
ErtsSmpBPUnlock(bdt);
*ret_flags = erts_call_trace(p, pc-3/*mfa*/, bdt->match_spec, args,
1, &tpid2);
*tracer_pid = tpid2;
if (tpid1 != tpid2) {
ErtsSmpBPLock(bdt);
bdt->tracer_pid = tpid2;
ErtsSmpBPUnlock(bdt);
}
bds[bp_sched2ix_proc(p)] = (BpData *) bdt;
return bdt->orig_instr;
}
/*
* SMP NOTE: Process p may have become exiting on return!
*/
Uint32
erts_bif_mtrace(Process *p, BeamInstr *pc, Eterm *args, int local,
Eterm *tracer_pid) {
BpData **bds = (BpData **) (pc)[-4];
BpDataTrace *bdt = NULL;
ASSERT(tracer_pid);
if (bds) {
Eterm tpid1, tpid2;
Uint32 flags;
bdt = (BpDataTrace *)bds[bp_sched2ix_proc(p)];
ErtsSmpBPLock(bdt);
tpid1 = tpid2 = bdt->tracer_pid;
ErtsSmpBPUnlock(bdt);
flags = erts_call_trace(p, pc-3/*mfa*/, bdt->match_spec, args,
local, &tpid2);
*tracer_pid = tpid2;
if (tpid1 != tpid2) {
ErtsSmpBPLock(bdt);
bdt->tracer_pid = tpid2;
ErtsSmpBPUnlock(bdt);
}
return flags;
}
*tracer_pid = NIL;
return 0;
}
int
erts_is_trace_break(BeamInstr *pc, Binary **match_spec_ret, Eterm *tracer_pid_ret) {
BpDataTrace *bdt =
(BpDataTrace *) is_break(pc, (BeamInstr) BeamOp(op_i_trace_breakpoint));
if (bdt) {
if (match_spec_ret) {
*match_spec_ret = bdt->match_spec;
}
if (tracer_pid_ret) {
ErtsSmpBPLock(bdt);
*tracer_pid_ret = bdt->tracer_pid;
ErtsSmpBPUnlock(bdt);
}
return !0;
}
return 0;
}
int
erts_is_mtrace_break(BeamInstr *pc, Binary **match_spec_ret, Eterm *tracer_pid_ret) {
BpDataTrace *bdt =
(BpDataTrace *) is_break(pc, (BeamInstr) BeamOp(op_i_mtrace_breakpoint));
if (bdt) {
if (match_spec_ret) {
*match_spec_ret = bdt->match_spec;
}
if (tracer_pid_ret) {
ErtsSmpBPLock(bdt);
*tracer_pid_ret = bdt->tracer_pid;
ErtsSmpBPUnlock(bdt);
}
return !0;
}
return 0;
}
int
erts_is_mtrace_bif(BeamInstr *pc, Binary **match_spec_ret, Eterm *tracer_pid_ret) {
BpDataTrace *bdt = (BpDataTrace *) pc[-4];
if (bdt) {
if (match_spec_ret) {
*match_spec_ret = bdt->match_spec;
}
if (tracer_pid_ret) {
ErtsSmpBPLock(bdt);
*tracer_pid_ret = bdt->tracer_pid;
ErtsSmpBPUnlock(bdt);
}
return !0;
}
return 0;
}
int
erts_is_native_break(BeamInstr *pc) {
#ifdef HIPE
ASSERT(pc[-5] == (BeamInstr) BeamOp(op_i_func_info_IaaI));
return pc[0] == (BeamInstr) BeamOp(op_hipe_trap_call)
|| pc[0] == (BeamInstr) BeamOp(op_hipe_trap_call_closure);
#else
return 0;
#endif
}
int
erts_is_count_break(BeamInstr *pc, Sint *count_ret) {
BpDataCount *bdc =
(BpDataCount *) is_break(pc, (BeamInstr) BeamOp(op_i_count_breakpoint));
if (bdc) {
if (count_ret) {
ErtsSmpBPLock(bdc);
*count_ret = bdc->count;
ErtsSmpBPUnlock(bdc);
}
return !0;
}
return 0;
}
int erts_is_time_break(Process *p, BeamInstr *pc, Eterm *retval) {
BpDataTime *bdt = (BpDataTime *) is_break(pc, (BeamInstr) BeamOp(op_i_time_breakpoint));
Uint i, ix;
bp_time_hash_t hash;
Uint size;
Eterm *hp, t;
bp_data_time_item_t *item = NULL;
if (bdt) {
if (retval) {
/* collect all hashes to one hash */
bp_hash_init(&hash, 64);
/* foreach threadspecific hash */
for (i = 0; i < bdt->n; i++) {
bp_data_time_item_t *sitem;
/* foreach hash bucket not NIL*/
for(ix = 0; ix < bdt->hash[i].n; ix++) {
item = &(bdt->hash[i].item[ix]);
if (item->pid != NIL) {
sitem = bp_hash_get(&hash, item);
if (sitem) {
BP_TIME_ADD(sitem, item);
} else {
bp_hash_put(&hash, item);
}
}
}
}
*retval = NIL;
if (hash.used > 0) {
size = (5 + 2)*hash.used;
hp = HAlloc(p, size);
for(ix = 0; ix < hash.n; ix++) {
item = &(hash.item[ix]);
if (item->pid != NIL) {
t = TUPLE4(hp, item->pid,
make_small(item->count),
make_small(item->s_time),
make_small(item->us_time));
hp += 5;
*retval = CONS(hp, t, *retval); hp += 2;
}
}
}
bp_hash_delete(&hash);
}
return !0;
}
return 0;
}
BeamInstr *
erts_find_local_func(Eterm mfa[3]) {
Module *modp;
BeamInstr** code_base;
BeamInstr* code_ptr;
Uint i,n;
if ((modp = erts_get_module(mfa[0])) == NULL)
return NULL;
if ((code_base = (BeamInstr **) modp->code) == NULL)
return NULL;
n = (BeamInstr) code_base[MI_NUM_FUNCTIONS];
for (i = 0; i < n; ++i) {
code_ptr = code_base[MI_FUNCTIONS+i];
ASSERT(((BeamInstr) BeamOp(op_i_func_info_IaaI)) == code_ptr[0]);
ASSERT(mfa[0] == ((Eterm) code_ptr[2]));
if (mfa[1] == ((Eterm) code_ptr[3]) &&
((BeamInstr) mfa[2]) == code_ptr[4]) {
return code_ptr + 5;
}
}
return NULL;
}
/* bp_hash */
ERTS_INLINE Uint bp_sched2ix() {
#ifdef ERTS_SMP
ErtsSchedulerData *esdp;
esdp = erts_get_scheduler_data();
return esdp->no - 1;
#else
return 0;
#endif
}
static void bp_hash_init(bp_time_hash_t *hash, Uint n) {
Uint size = sizeof(bp_data_time_item_t)*n;
Uint i;
hash->n = n;
hash->used = 0;
hash->item = (bp_data_time_item_t *)Alloc(size);
sys_memzero(hash->item, size);
for(i = 0; i < n; ++i) {
hash->item[i].pid = NIL;
}
}
static void bp_hash_rehash(bp_time_hash_t *hash, Uint n) {
bp_data_time_item_t *item = NULL;
Uint size = sizeof(bp_data_time_item_t)*n;
Uint ix;
Uint hval;
item = (bp_data_time_item_t *)Alloc(size);
sys_memzero(item, size);
for( ix = 0; ix < n; ++ix) {
item[ix].pid = NIL;
}
/* rehash, old hash -> new hash */
for( ix = 0; ix < hash->n; ix++) {
if (hash->item[ix].pid != NIL) {
hval = ((hash->item[ix].pid) >> 4) % n; /* new n */
while (item[hval].pid != NIL) {
hval = (hval + 1) % n;
}
item[hval].pid = hash->item[ix].pid;
item[hval].count = hash->item[ix].count;
item[hval].s_time = hash->item[ix].s_time;
item[hval].us_time = hash->item[ix].us_time;
}
}
Free(hash->item);
hash->n = n;
hash->item = item;
}
static ERTS_INLINE bp_data_time_item_t * bp_hash_get(bp_time_hash_t *hash, bp_data_time_item_t *sitem) {
Eterm pid = sitem->pid;
Uint hval = (pid >> 4) % hash->n;
bp_data_time_item_t *item = NULL;
item = hash->item;
while (item[hval].pid != pid) {
if (item[hval].pid == NIL) return NULL;
hval = (hval + 1) % hash->n;
}
return &(item[hval]);
}
static ERTS_INLINE bp_data_time_item_t * bp_hash_put(bp_time_hash_t *hash, bp_data_time_item_t* sitem) {
Uint hval = (sitem->pid >> 4) % hash->n;
float r = 0.0;
bp_data_time_item_t *item;
/* make sure that the hash is not saturated */
/* if saturated, rehash it */
r = hash->used / (float) hash->n;
if (r > 0.7f) {
bp_hash_rehash(hash, hash->n * 2);
}
/* find free slot */
item = hash->item;
while (item[hval].pid != NIL) {
hval = (hval + 1) % hash->n;
}
item = &(hash->item[hval]);
item->pid = sitem->pid;
item->s_time = sitem->s_time;
item->us_time = sitem->us_time;
item->count = sitem->count;
hash->used++;
return item;
}
static void bp_hash_delete(bp_time_hash_t *hash) {
hash->n = 0;
hash->used = 0;
Free(hash->item);
hash->item = NULL;
}
static void bp_time_diff(bp_data_time_item_t *item, /* out */
process_breakpoint_time_t *pbt, /* in */
Uint ms, Uint s, Uint us) {
int dms,ds,dus;
dms = ms - pbt->ms;
ds = s - pbt->s;
dus = us - pbt->us;
/* get_sys_now may return zero difftime,
* this is ok.
*/
ASSERT(dms >= 0 || ds >= 0 || dus >= 0);
if (dus < 0) {
dus += 1000000;
ds -= 1;
}
if (ds < 0) {
ds += 1000000;
}
item->s_time = ds;
item->us_time = dus;
}
void erts_schedule_time_break(Process *p, Uint schedule) {
Uint ms, s, us;
process_breakpoint_time_t *pbt = NULL;
bp_data_time_item_t sitem, *item = NULL;
bp_time_hash_t *h = NULL;
BpDataTime *pbdt = NULL;
ASSERT(p);
pbt = ERTS_PROC_GET_CALL_TIME(p);
if (pbt) {
switch(schedule) {
case ERTS_BP_CALL_TIME_SCHEDULE_EXITING :
break;
case ERTS_BP_CALL_TIME_SCHEDULE_OUT :
/* When a process is scheduled _out_,
* timestamp it and add its delta to
* the previous breakpoint.
*/
pbdt = (BpDataTime *) get_break(p, pbt->pc, (BeamInstr) BeamOp(op_i_time_breakpoint));
if (pbdt) {
get_sys_now(&ms,&s,&us);
bp_time_diff(&sitem, pbt, ms, s, us);
sitem.pid = p->id;
sitem.count = 0;
h = &(pbdt->hash[bp_sched2ix_proc(p)]);
ASSERT(h);
ASSERT(h->item);
item = bp_hash_get(h, &sitem);
if (!item) {
item = bp_hash_put(h, &sitem);
} else {
BP_TIME_ADD(item, &sitem);
}
}
break;
case ERTS_BP_CALL_TIME_SCHEDULE_IN :
/* When a process is scheduled _in_,
* timestamp it and remove the previous
* timestamp in the psd.
*/
get_sys_now(&ms,&s,&us);
pbt->ms = ms;
pbt->s = s;
pbt->us = us;
break;
default :
ASSERT(0);
/* will never happen */
break;
}
} /* pbt */
}
/* call_time breakpoint
* Accumulated times are added to the previous bp,
* not the current one. The current one is saved
* for future reference.
* The previous breakpoint is stored in the process it self, the psd.
* We do not need to store in a stack frame.
* There is no need for locking, each thread has its own
* area in each bp to save data.
* Since we need to diffrentiate between processes for each bp,
* every bp has a hash (per thread) to process-bp statistics.
* - egil
*/
void erts_trace_time_break(Process *p, BeamInstr *pc, BpDataTime *bdt, Uint type) {
Uint ms,s,us;
process_breakpoint_time_t *pbt = NULL;
bp_data_time_item_t sitem, *item = NULL;
bp_time_hash_t *h = NULL;
BpDataTime *pbdt = NULL;
ASSERT(p);
ASSERT(p->status == P_RUNNING);
/* get previous timestamp and breakpoint
* from the process psd */
pbt = ERTS_PROC_GET_CALL_TIME(p);
get_sys_now(&ms,&s,&us);
switch(type) {
/* get pbt
* timestamp = t0
* lookup bdt from code
* set ts0 to pbt
* add call count here?
*/
case ERTS_BP_CALL_TIME_CALL:
case ERTS_BP_CALL_TIME_TAIL_CALL:
if (pbt) {
ASSERT(pbt->pc);
/* add time to previous code */
bp_time_diff(&sitem, pbt, ms, s, us);
sitem.pid = p->id;
sitem.count = 0;
/* previous breakpoint */
pbdt = (BpDataTime *) get_break(p, pbt->pc, (BeamInstr) BeamOp(op_i_time_breakpoint));
/* if null then the breakpoint was removed */
if (pbdt) {
h = &(pbdt->hash[bp_sched2ix_proc(p)]);
ASSERT(h);
ASSERT(h->item);
item = bp_hash_get(h, &sitem);
if (!item) {
item = bp_hash_put(h, &sitem);
} else {
BP_TIME_ADD(item, &sitem);
}
}
} else {
/* first call of process to instrumented function */
pbt = Alloc(sizeof(process_breakpoint_time_t));
(void *) ERTS_PROC_SET_CALL_TIME(p, ERTS_PROC_LOCK_MAIN, pbt);
}
/* add count to this code */
sitem.pid = p->id;
sitem.count = 1;
sitem.s_time = 0;
sitem.us_time = 0;
/* this breakpoint */
ASSERT(bdt);
h = &(bdt->hash[bp_sched2ix_proc(p)]);
ASSERT(h);
ASSERT(h->item);
item = bp_hash_get(h, &sitem);
if (!item) {
item = bp_hash_put(h, &sitem);
} else {
BP_TIME_ADD(item, &sitem);
}
pbt->pc = pc;
pbt->ms = ms;
pbt->s = s;
pbt->us = us;
break;
case ERTS_BP_CALL_TIME_RETURN:
/* get pbt
* lookup bdt from code
* timestamp = t1
* get ts0 from pbt
* get item from bdt->hash[bp_hash(p->id)]
* ack diff (t1, t0) to item
*/
if(pbt) {
/* might have been removed due to
* trace_pattern(false)
*/
ASSERT(pbt->pc);
bp_time_diff(&sitem, pbt, ms, s, us);
sitem.pid = p->id;
sitem.count = 0;
/* previous breakpoint */
pbdt = (BpDataTime *) get_break(p, pbt->pc, (BeamInstr) BeamOp(op_i_time_breakpoint));
/* beware, the trace_pattern might have been removed */
if (pbdt) {
h = &(pbdt->hash[bp_sched2ix_proc(p)]);
ASSERT(h);
ASSERT(h->item);
item = bp_hash_get(h, &sitem);
if (!item) {
item = bp_hash_put(h, &sitem);
} else {
BP_TIME_ADD(item, &sitem);
}
}
pbt->pc = pc;
pbt->ms = ms;
pbt->s = s;
pbt->us = us;
}
break;
default :
ASSERT(0);
/* will never happen */
break;
}
}
/* *************************************************************************
** Local helpers
*/
static int set_break(Eterm mfa[3], int specified,
Binary *match_spec, BeamInstr break_op,
enum erts_break_op count_op, Eterm tracer_pid)
{
Module *modp;
int num_processed = 0;
if (!specified) {
/* Find and process all modules in the system... */
int current;
int last = module_code_size();
for (current = 0; current < last; current++) {
modp = module_code(current);
ASSERT(modp != NULL);
num_processed +=
set_module_break(modp, mfa, specified,
match_spec, break_op, count_op,
tracer_pid);
}
} else {
/* Process a single module */
if ((modp = erts_get_module(mfa[0])) != NULL) {
num_processed +=
set_module_break(modp, mfa, specified,
match_spec, break_op, count_op,
tracer_pid);
}
}
return num_processed;
}
static int set_module_break(Module *modp, Eterm mfa[3], int specified,
Binary *match_spec, BeamInstr break_op,
enum erts_break_op count_op, Eterm tracer_pid) {
BeamInstr** code_base;
BeamInstr* code_ptr;
int num_processed = 0;
Uint i,n;
ASSERT(break_op);
ASSERT(modp);
code_base = (BeamInstr **) modp->code;
if (code_base == NULL) {
return 0;
}
n = (BeamInstr) code_base[MI_NUM_FUNCTIONS];
for (i = 0; i < n; ++i) {
code_ptr = code_base[MI_FUNCTIONS+i];
ASSERT(code_ptr[0] == (BeamInstr) BeamOp(op_i_func_info_IaaI));
if ((specified < 2 || mfa[1] == ((Eterm) code_ptr[3])) &&
(specified < 3 || ((int) mfa[2]) == ((int) code_ptr[4]))) {
BeamInstr *pc = code_ptr+5;
num_processed +=
set_function_break(modp, pc, match_spec,
break_op, count_op, tracer_pid);
}
}
return num_processed;
}
static int set_function_break(Module *modp, BeamInstr *pc,
Binary *match_spec, BeamInstr break_op,
enum erts_break_op count_op, Eterm tracer_pid) {
BpData *bd, **r, ***rs;
size_t size;
Uint ix = 0;
BeamInstr **code_base = (BeamInstr **)modp->code;
ASSERT(code_base);
ASSERT(code_base <= (BeamInstr **)pc);
ASSERT((BeamInstr **)pc < code_base + (modp->code_length/sizeof(BeamInstr *)));
/*
* Currently no trace support for native code.
*/
if (erts_is_native_break(pc)) {
return 0;
}
/* Do not allow two breakpoints of the same kind */
if ( (bd = is_break(pc, break_op))) {
if (break_op == (BeamInstr) BeamOp(op_i_trace_breakpoint)
|| break_op == (BeamInstr) BeamOp(op_i_mtrace_breakpoint)) {
BpDataTrace *bdt = (BpDataTrace *) bd;
Binary *old_match_spec;
/* Update match spec and tracer */
MatchSetRef(match_spec);
ErtsSmpBPLock(bdt);
old_match_spec = bdt->match_spec;
bdt->match_spec = match_spec;
bdt->tracer_pid = tracer_pid;
ErtsSmpBPUnlock(bdt);
MatchSetUnref(old_match_spec);
} else {
ASSERT(! match_spec);
ASSERT(is_nil(tracer_pid));
if (break_op == (BeamInstr) BeamOp(op_i_count_breakpoint)) {
BpDataCount *bdc = (BpDataCount *) bd;
ErtsSmpBPLock(bdc);
if (count_op == erts_break_stop) {
if (bdc->count >= 0) {
bdc->count = -bdc->count-1; /* Stop call counter */
}
} else {
bdc->count = 0; /* Reset call counter */
}
ErtsSmpBPUnlock(bdc);
} else if (break_op == (Uint) BeamOp(op_i_time_breakpoint)) {
BpDataTime *bdt = (BpDataTime *) bd;
Uint i = 0;
ERTS_SMP_LC_ASSERT(erts_smp_is_system_blocked(0));
if (count_op == erts_break_stop) {
bdt->pause = 1;
} else {
bdt->pause = 0;
for (i = 0; i < bdt->n; i++) {
bp_hash_delete(&(bdt->hash[i]));