aboutsummaryrefslogtreecommitdiffstats
path: root/erts
diff options
context:
space:
mode:
Diffstat (limited to 'erts')
-rw-r--r--erts/emulator/beam/erl_db.c62
-rw-r--r--erts/etc/unix/etp-commands.in150
2 files changed, 182 insertions, 30 deletions
diff --git a/erts/emulator/beam/erl_db.c b/erts/emulator/beam/erl_db.c
index a5d67571e2..8f246ffa07 100644
--- a/erts/emulator/beam/erl_db.c
+++ b/erts/emulator/beam/erl_db.c
@@ -259,10 +259,11 @@ static void schedule_free_dbtable(DbTable* tb)
/*
* NON-SMP case: Caller is *not* allowed to access the *tb
* structure after this function has returned!
- * SMP case: Caller is allowed to access the *tb structure
- * until the bif has returned (we typically
- * need to unlock the table lock after this
- * function has returned).
+ * SMP case: Caller is allowed to access the *common* part of the *tb
+ * structure until the bif has returned (we typically need to
+ * unlock the table lock after this function has returned).
+ * Caller is *not* allowed to access the specialized part
+ * (hash or tree) of *tb after this function has returned.
*/
ASSERT(erts_refc_read(&tb->common.ref, 0) == 0);
erts_schedule_thr_prgr_later_cleanup_op(free_dbtable,
@@ -3279,34 +3280,37 @@ erts_db_process_exiting(Process *c_p, ErtsProcLocks c_p_locks)
}
erts_smp_rwmtx_runlock(mmtl);
if (tb) {
- int reds;
- DbFixation** pp;
+ int reds = 0;
db_lock(tb, LCK_WRITE_REC);
- #ifdef ERTS_SMP
- erts_smp_mtx_lock(&tb->common.fixlock);
- #endif
- reds = 10;
-
- for (pp = &tb->common.fixations; *pp != NULL;
- pp = &(*pp)->next) {
- if ((*pp)->pid == pid) {
- DbFixation* fix = *pp;
- erts_aint_t diff = -((erts_aint_t) fix->counter);
- erts_refc_add(&tb->common.ref,diff,0);
- *pp = fix->next;
- erts_db_free(ERTS_ALC_T_DB_FIXATION,
- tb, fix, sizeof(DbFixation));
- ERTS_ETS_MISC_MEM_ADD(-sizeof(DbFixation));
- break;
+ if (!(tb->common.status & DB_DELETE)) {
+ DbFixation** pp;
+
+ #ifdef ERTS_SMP
+ erts_smp_mtx_lock(&tb->common.fixlock);
+ #endif
+ reds = 10;
+
+ for (pp = &tb->common.fixations; *pp != NULL;
+ pp = &(*pp)->next) {
+ if ((*pp)->pid == pid) {
+ DbFixation* fix = *pp;
+ erts_aint_t diff = -((erts_aint_t) fix->counter);
+ erts_refc_add(&tb->common.ref,diff,0);
+ *pp = fix->next;
+ erts_db_free(ERTS_ALC_T_DB_FIXATION,
+ tb, fix, sizeof(DbFixation));
+ ERTS_ETS_MISC_MEM_ADD(-sizeof(DbFixation));
+ break;
+ }
+ }
+ #ifdef ERTS_SMP
+ erts_smp_mtx_unlock(&tb->common.fixlock);
+ #endif
+ if (!IS_FIXED(tb) && IS_HASH_TABLE(tb->common.status)) {
+ db_unfix_table_hash(&(tb->hash));
+ reds += 40;
}
- }
- #ifdef ERTS_SMP
- erts_smp_mtx_unlock(&tb->common.fixlock);
- #endif
- if (!IS_FIXED(tb) && IS_HASH_TABLE(tb->common.status)) {
- db_unfix_table_hash(&(tb->hash));
- reds += 40;
}
db_unlock(tb, LCK_WRITE_REC);
BUMP_REDS(c_p, reds);
diff --git a/erts/etc/unix/etp-commands.in b/erts/etc/unix/etp-commands.in
index 77777196a6..ed90e26024 100644
--- a/erts/etc/unix/etp-commands.in
+++ b/erts/etc/unix/etp-commands.in
@@ -1,7 +1,7 @@
#
# %CopyrightBegin%
#
-# Copyright Ericsson AB 2005-2012. All Rights Reserved.
+# Copyright Ericsson AB 2005-2014. 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
@@ -3258,6 +3258,154 @@ define etp-thr
end
############################################################################
+# erl_alloc_util (blocks and carriers)
+#
+
+define etp-block-size-1
+#
+# In: (Block_t*) in $arg0
+# Out: Byte size in $etp_blk_sz
+#
+ if ($arg0)->bhdr & 1
+ # Free block
+ set $etp_blk_sz = ($arg0)->bhdr & ~7
+ else
+ # Allocated block
+ if !$etp_MBC_ABLK_SZ_MASK
+ if etp_arch_bits == 64
+ set $etp_MBC_ABLK_OFFSET_SHIFT = (64 - 24)
+ else
+ set $etp_MBC_ABLK_OFFSET_SHIFT = (32 - 9)
+ end
+ set $etp_MBC_ABLK_SZ_MASK = ~(~0 << $etp_MBC_ABLK_OFFSET_SHIFT) & ~7
+ end
+ set $etp_blk_sz = ($arg0)->bhdr & $etp_MBC_ABLK_SZ_MASK
+ end
+end
+
+define etp-block2mbc-1
+#
+# In: (Block_t*) in $arg0
+# Out: (Carrier_t*) in $etp-mbc
+#
+ if (($arg0)->bhdr) & 1
+ # Free block
+ set $etp_mbc = ($arg0)->u.carrier
+ else
+ # Allocated block
+ if !$etp_MBC_ABLK_OFFSET_SHIFT
+ if etp_arch_bits == 64
+ set $etp_MBC_ABLK_OFFSET_SHIFT = (64 - 24)
+ else
+ set $etp_MBC_ABLK_OFFSET_SHIFT = (32 - 9)
+ end
+ end
+ set $etp_mbc = (Carrier_t*) ((((UWord)($arg0)) & (~0 << 18)) - ((($arg0)->bhdr >> $etp_MBC_ABLK_OFFSET_SHIFT) << 18))
+ end
+end
+
+define etp-block2mbc
+ etp-block2mbc-1 ((Block_t*)$arg0)
+ print $etp_mbc
+end
+
+document etp-block2mbc
+%---------------------------------------------------------------------------
+% Print pointer to multiblock carrier containing the argument (Block_t*)
+%---------------------------------------------------------------------------
+end
+
+define etp-block
+ etp-block-size-1 ((Block_t*)$arg0)
+ if ((Block_t*)$arg0)->bhdr & 1
+ printf "%#lx: FREE sz=%#x\n", ($arg0), $etp_blk_sz
+ else
+ printf "%#lx: ALLOCATED sz=%#x\n", ($arg0), $etp_blk_sz
+ end
+end
+
+document etp-block
+%---------------------------------------------------------------------------
+% Print memory block (Block_t*)
+%---------------------------------------------------------------------------
+end
+
+define etp-carrier-blocks
+ set $etp_crr = (Carrier_t*) $arg0
+ set $etp_alc = (Allctr_t*)($etp_crr->allctr.counter & ~7)
+ set $etp_blk = (Block_t*) ((char*)$etp_crr + $etp_alc->mbc_header_size)
+ set $etp_prev_blk = 0
+ set $etp_error_cnt = 0
+ set $etp_ablk_cnt = 0
+ set $etp_fblk_cnt = 0
+
+ if $argc == 2
+ set $etp_be_silent = $arg1
+ else
+ set $etp_be_silent = 0
+ end
+
+ while 1
+ if !$etp_be_silent
+ etp-block $etp_blk
+ else
+ etp-block-size-1 $etp_blk
+ end
+ etp-block2mbc-1 $etp_blk
+ if $etp_mbc != $etp_crr
+ printf "ERROR: Invalid carrier pointer %#lx in block at %#lx\n", $etp_mbc, $etp_blk
+ set $etp_error_cnt = $etp_error_cnt + 1
+ end
+ if $etp_prev_blk
+ if ($etp_prev_blk->bhdr & 1)
+ # Prev is FREE
+ if ($etp_blk->bhdr & 1)
+ printf "ERROR: Adjacent FREE blocks at %#lx and %#lx\n", $etp_prev_blk, $etp_blk
+ set $etp_error_cnt = $etp_error_cnt + 1
+ end
+ if !($etp_blk->bhdr & 2)
+ printf "ERROR: Missing PREV_FREE_BLK_HDR_FLG (2) in block at %#lx\n", $etp_blk
+ set $etp_error_cnt = $etp_error_cnt + 1
+ end
+ end
+ end
+ if $etp_blk->bhdr & 1
+ set $etp_fblk_cnt = $etp_fblk_cnt + 1
+ else
+ set $etp_ablk_cnt = $etp_ablk_cnt + 1
+ end
+ if $etp_blk->bhdr & 4
+ # Last block
+ loop_break
+ end
+ # All free blocks except the last have a footer
+ if ($etp_blk->bhdr & 1) && ((UWord*)((char*)$etp_blk + $etp_blk_sz))[-1] != $etp_blk_sz
+ printf "ERROR: Invalid footer of free block at %#lx\n", $etp_blk
+ end
+ set $etp_prev_blk = $etp_blk
+ set $etp_blk = (Block_t*) ((char*)$etp_blk + $etp_blk_sz)
+ end
+
+ if ((char*)$etp_blk + $etp_blk_sz) != ((char*)$etp_crr + ($etp_crr->chdr & ~7))
+ printf "ERROR: Last block not at end of carrier\n"
+ set $etp_error_cnt = $etp_error_cnt + 1
+ end
+ printf "Allocated blocks: %u\n", $etp_ablk_cnt
+ printf "Free blocks: %u\n", $etp_fblk_cnt
+ if $etp_error_cnt
+ printf "%u ERRORs reported above\n", $etp-error-cnt
+ end
+end
+
+document etp-carrier-blocks
+%---------------------------------------------------------------------------
+% Check and (maybe) print all memory blocks in carrier
+% Args: (Carrier_t*) [1=be_silent]
+%---------------------------------------------------------------------------
+end
+
+
+############################################################################
# Toolbox parameter handling
#
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 12:53:32 +0000