/* * %CopyrightBegin% * * Copyright Ericsson AB 1996-2011. 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 #define ERTS_DO_INCL_GLB_INLINE_FUNC_DEF #include "sys.h" #include "erl_vm.h" #include "global.h" #include "erl_process.h" #include "big.h" #include "bif.h" #include "erl_binary.h" #include "erl_bits.h" #include "packet_parser.h" #include "erl_gc.h" #define ERTS_WANT_DB_INTERNAL__ #include "erl_db.h" #include "erl_threads.h" #include "register.h" #include "dist.h" #include "erl_printf.h" #include "erl_threads.h" #include "erl_smp.h" #include "erl_time.h" #undef M_TRIM_THRESHOLD #undef M_TOP_PAD #undef M_MMAP_THRESHOLD #undef M_MMAP_MAX #if defined(__GLIBC__) && defined(HAVE_MALLOC_H) #include #endif #if !defined(HAVE_MALLOPT) #undef HAVE_MALLOPT #define HAVE_MALLOPT 0 #endif /* profile_scheduler mini message queue */ typedef struct { Uint scheduler_id; Uint no_schedulers; Uint Ms; Uint s; Uint us; Eterm state; } profile_sched_msg; typedef struct { profile_sched_msg msg[2]; Uint n; } profile_sched_msg_q; #ifdef ERTS_SMP static void dispatch_profile_msg_q(profile_sched_msg_q *psmq) { int i = 0; profile_sched_msg *msg = NULL; ASSERT(psmq != NULL); for (i = 0; i < psmq->n; i++) { msg = &(psmq->msg[i]); profile_scheduler_q(make_small(msg->scheduler_id), msg->state, am_undefined, msg->Ms, msg->s, msg->us); } } #endif Eterm* erts_heap_alloc(Process* p, Uint need, Uint xtra) { ErlHeapFragment* bp; Eterm* htop; Uint n; #if defined(DEBUG) || defined(CHECK_FOR_HOLES) Uint i; #endif #ifdef FORCE_HEAP_FRAGS if (p->space_verified && p->space_verified_from!=NULL && HEAP_TOP(p) >= p->space_verified_from && HEAP_TOP(p) + need <= p->space_verified_from + p->space_verified && HEAP_LIMIT(p) - HEAP_TOP(p) >= need) { Uint consumed = need + (HEAP_TOP(p) - p->space_verified_from); ASSERT(consumed <= p->space_verified); p->space_verified -= consumed; p->space_verified_from += consumed; HEAP_TOP(p) = p->space_verified_from; return HEAP_TOP(p) - need; } p->space_verified = 0; p->space_verified_from = NULL; #endif /* FORCE_HEAP_FRAGS */ n = need + xtra; bp = MBUF(p); if (bp != NULL && need <= (bp->alloc_size - bp->used_size)) { Eterm* ret = bp->mem + bp->used_size; bp->used_size += need; return ret; } #ifdef DEBUG n++; #endif bp = (ErlHeapFragment*) ERTS_HEAP_ALLOC(ERTS_ALC_T_HEAP_FRAG, ERTS_HEAP_FRAG_SIZE(n)); #if defined(DEBUG) || defined(CHECK_FOR_HOLES) for (i = 0; i < n; i++) { bp->mem[i] = ERTS_HOLE_MARKER; } #endif #ifdef DEBUG n--; #endif /* * When we have created a heap fragment, we are no longer allowed * to store anything more on the heap. */ htop = HEAP_TOP(p); if (htop < HEAP_LIMIT(p)) { *htop = make_pos_bignum_header(HEAP_LIMIT(p)-htop-1); HEAP_TOP(p) = HEAP_LIMIT(p); } bp->next = MBUF(p); MBUF(p) = bp; bp->alloc_size = n; bp->used_size = need; MBUF_SIZE(p) += n; bp->off_heap.first = NULL; bp->off_heap.overhead = 0; return bp->mem; } #ifdef CHECK_FOR_HOLES Eterm* erts_set_hole_marker(Eterm* ptr, Uint sz) { Eterm* p = ptr; int i; for (i = 0; i < sz; i++) { *p++ = ERTS_HOLE_MARKER; } return ptr; } #endif /* * Helper function for the ESTACK macros defined in global.h. */ void erl_grow_stack(Eterm** start, Eterm** sp, Eterm** end) { Uint old_size = (*end - *start); Uint new_size = old_size * 2; Uint sp_offs = *sp - *start; if (new_size > 2 * DEF_ESTACK_SIZE) { *start = erts_realloc(ERTS_ALC_T_ESTACK, (void *) *start, new_size*sizeof(Eterm)); } else { Eterm* new_ptr = erts_alloc(ERTS_ALC_T_ESTACK, new_size*sizeof(Eterm)); sys_memcpy(new_ptr, *start, old_size*sizeof(Eterm)); *start = new_ptr; } *end = *start + new_size; *sp = *start + sp_offs; } /* * Helper function for the ESTACK macros defined in global.h. */ void erl_grow_wstack(UWord** start, UWord** sp, UWord** end) { Uint old_size = (*end - *start); Uint new_size = old_size * 2; Uint sp_offs = *sp - *start; if (new_size > 2 * DEF_ESTACK_SIZE) { *start = erts_realloc(ERTS_ALC_T_ESTACK, (void *) *start, new_size*sizeof(UWord)); } else { UWord* new_ptr = erts_alloc(ERTS_ALC_T_ESTACK, new_size*sizeof(UWord)); sys_memcpy(new_ptr, *start, old_size*sizeof(UWord)); *start = new_ptr; } *end = *start + new_size; *sp = *start + sp_offs; } /* CTYPE macros */ #define LATIN1 #define IS_DIGIT(c) ((c) >= '0' && (c) <= '9') #ifdef LATIN1 #define IS_LOWER(c) (((c) >= 'a' && (c) <= 'z') \ || ((c) >= 128+95 && (c) <= 255 && (c) != 247)) #define IS_UPPER(c) (((c) >= 'A' && (c) <= 'Z') \ || ((c) >= 128+64 && (c) <= 128+94 && (c) != 247-32)) #else #define IS_LOWER(c) ((c) >= 'a' && (c) <= 'z') #define IS_UPPER(c) ((c) >= 'A' && (c) <= 'Z') #endif #define IS_ALNUM(c) (IS_DIGIT(c) || IS_LOWER(c) || IS_UPPER(c)) /* We don't include 160 (non-breaking space). */ #define IS_SPACE(c) (c == ' ' || c == '\n' || c == '\t' || c == '\r') #ifdef LATIN1 #define IS_CNTRL(c) ((c) < ' ' || (c) == 127 \ || ((c) >= 128 && (c) < 128+32)) #else /* Treat all non-ASCII as control characters */ #define IS_CNTRL(c) ((c) < ' ' || (c) >= 127) #endif #define IS_PRINT(c) (!IS_CNTRL(c)) /* * Calculate length of a list. * Returns -1 if not a proper list (i.e. not terminated with NIL) */ int list_length(Eterm list) { int i = 0; while(is_list(list)) { i++; list = CDR(list_val(list)); } if (is_not_nil(list)) { return -1; } return i; } Uint erts_fit_in_bits(Uint n) { Uint i; i = 0; while (n > 0) { i++; n >>= 1; } return i; } int erts_print(int to, void *arg, char *format, ...) { int res; va_list arg_list; va_start(arg_list, format); if (to < ERTS_PRINT_MIN) res = -EINVAL; else { switch (to) { case ERTS_PRINT_STDOUT: res = erts_vprintf(format, arg_list); break; case ERTS_PRINT_STDERR: res = erts_vfprintf(stderr, format, arg_list); break; case ERTS_PRINT_FILE: res = erts_vfprintf((FILE *) arg, format, arg_list); break; case ERTS_PRINT_SBUF: res = erts_vsprintf((char *) arg, format, arg_list); break; case ERTS_PRINT_SNBUF: res = erts_vsnprintf(((erts_print_sn_buf *) arg)->buf, ((erts_print_sn_buf *) arg)->size, format, arg_list); break; case ERTS_PRINT_DSBUF: res = erts_vdsprintf((erts_dsprintf_buf_t *) arg, format, arg_list); break; case ERTS_PRINT_INVALID: res = -EINVAL; break; default: res = erts_vfdprintf((int) to, format, arg_list); break; } } va_end(arg_list); return res; } int erts_putc(int to, void *arg, char c) { return erts_print(to, arg, "%c", c); } /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\ * Some Erlang term building utility functions (to be used when performance * * isn't critical). * * * * Add more functions like these here (and function prototypes in global.h) * * when needed. * * * \* */ Eterm erts_bld_atom(Uint **hpp, Uint *szp, char *str) { if (hpp) return am_atom_put(str, sys_strlen(str)); else return THE_NON_VALUE; } Eterm erts_bld_uint(Uint **hpp, Uint *szp, Uint ui) { Eterm res = THE_NON_VALUE; if (IS_USMALL(0, ui)) { if (hpp) res = make_small(ui); } else { if (szp) *szp += BIG_UINT_HEAP_SIZE; if (hpp) { res = uint_to_big(ui, *hpp); *hpp += BIG_UINT_HEAP_SIZE; } } return res; } /* * Erts_bld_uword is more or less similar to erts_bld_uint, but a pointer * can safely be passed. */ Eterm erts_bld_uword(Uint **hpp, Uint *szp, UWord uw) { Eterm res = THE_NON_VALUE; if (IS_USMALL(0, uw)) { if (hpp) res = make_small((Uint) uw); } else { if (szp) *szp += BIG_UWORD_HEAP_SIZE(uw); if (hpp) { res = uword_to_big(uw, *hpp); *hpp += BIG_UWORD_HEAP_SIZE(uw); } } return res; } Eterm erts_bld_uint64(Uint **hpp, Uint *szp, Uint64 ui64) { Eterm res = THE_NON_VALUE; if (IS_USMALL(0, ui64)) { if (hpp) res = make_small((Uint) ui64); } else { if (szp) *szp += ERTS_UINT64_HEAP_SIZE(ui64); if (hpp) res = erts_uint64_to_big(ui64, hpp); } return res; } Eterm erts_bld_sint64(Uint **hpp, Uint *szp, Sint64 si64) { Eterm res = THE_NON_VALUE; if (IS_SSMALL(si64)) { if (hpp) res = make_small((Sint) si64); } else { if (szp) *szp += ERTS_SINT64_HEAP_SIZE(si64); if (hpp) res = erts_sint64_to_big(si64, hpp); } return res; } Eterm erts_bld_cons(Uint **hpp, Uint *szp, Eterm car, Eterm cdr) { Eterm res = THE_NON_VALUE; if (szp) *szp += 2; if (hpp) { res = CONS(*hpp, car, cdr); *hpp += 2; } return res; } Eterm erts_bld_tuple(Uint **hpp, Uint *szp, Uint arity, ...) { Eterm res = THE_NON_VALUE; ASSERT(arity < (((Uint)1) << (sizeof(Uint)*8 - _HEADER_ARITY_OFFS))); if (szp) *szp += arity + 1; if (hpp) { res = make_tuple(*hpp); *((*hpp)++) = make_arityval(arity); if (arity > 0) { Uint i; va_list argp; va_start(argp, arity); for (i = 0; i < arity; i++) { *((*hpp)++) = va_arg(argp, Eterm); } va_end(argp); } } return res; } Eterm erts_bld_tuplev(Uint **hpp, Uint *szp, Uint arity, Eterm terms[]) { Eterm res = THE_NON_VALUE; /* * Note callers expect that 'terms' is *not* accessed if hpp == NULL. */ ASSERT(arity < (((Uint)1) << (sizeof(Uint)*8 - _HEADER_ARITY_OFFS))); if (szp) *szp += arity + 1; if (hpp) { res = make_tuple(*hpp); *((*hpp)++) = make_arityval(arity); if (arity > 0) { Uint i; for (i = 0; i < arity; i++) *((*hpp)++) = terms[i]; } } return res; } Eterm erts_bld_string_n(Uint **hpp, Uint *szp, const char *str, Sint len) { Eterm res = THE_NON_VALUE; Sint i = len; if (szp) *szp += len*2; if (hpp) { res = NIL; while (--i >= 0) { res = CONS(*hpp, make_small((byte) str[i]), res); *hpp += 2; } } return res; } Eterm erts_bld_list(Uint **hpp, Uint *szp, Sint length, Eterm terms[]) { Eterm list = THE_NON_VALUE; if (szp) *szp += 2*length; if (hpp) { Sint i = length; list = NIL; while (--i >= 0) { list = CONS(*hpp, terms[i], list); *hpp += 2; } } return list; } Eterm erts_bld_2tup_list(Uint **hpp, Uint *szp, Sint length, Eterm terms1[], Uint terms2[]) { Eterm res = THE_NON_VALUE; if (szp) *szp += 5*length; if (hpp) { Sint i = length; res = NIL; while (--i >= 0) { res = CONS(*hpp+3, TUPLE2(*hpp, terms1[i], terms2[i]), res); *hpp += 5; } } return res; } Eterm erts_bld_atom_uint_2tup_list(Uint **hpp, Uint *szp, Sint length, Eterm atoms[], Uint uints[]) { Sint i; Eterm res = THE_NON_VALUE; if (szp) { *szp += 5*length; i = length; while (--i >= 0) { if (!IS_USMALL(0, uints[i])) *szp += BIG_UINT_HEAP_SIZE; } } if (hpp) { i = length; res = NIL; while (--i >= 0) { Eterm ui; if (IS_USMALL(0, uints[i])) ui = make_small(uints[i]); else { ui = uint_to_big(uints[i], *hpp); *hpp += BIG_UINT_HEAP_SIZE; } res = CONS(*hpp+3, TUPLE2(*hpp, atoms[i], ui), res); *hpp += 5; } } return res; } Eterm erts_bld_atom_2uint_3tup_list(Uint **hpp, Uint *szp, Sint length, Eterm atoms[], Uint uints1[], Uint uints2[]) { Sint i; Eterm res = THE_NON_VALUE; if (szp) { *szp += 6*length; i = length; while (--i >= 0) { if (!IS_USMALL(0, uints1[i])) *szp += BIG_UINT_HEAP_SIZE; if (!IS_USMALL(0, uints2[i])) *szp += BIG_UINT_HEAP_SIZE; } } if (hpp) { i = length; res = NIL; while (--i >= 0) { Eterm ui1; Eterm ui2; if (IS_USMALL(0, uints1[i])) ui1 = make_small(uints1[i]); else { ui1 = uint_to_big(uints1[i], *hpp); *hpp += BIG_UINT_HEAP_SIZE; } if (IS_USMALL(0, uints2[i])) ui2 = make_small(uints2[i]); else { ui2 = uint_to_big(uints2[i], *hpp); *hpp += BIG_UINT_HEAP_SIZE; } res = CONS(*hpp+4, TUPLE3(*hpp, atoms[i], ui1, ui2), res); *hpp += 6; } } return res; } /* *\ * * \* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /* make a hash index from an erlang term */ /* ** There are three hash functions. ** make_broken_hash: the one used for backward compatibility ** is called from the bif erlang:hash/2. Should never be used ** as it a) hashes only a part of binaries, b) hashes bignums really poorly, ** c) hashes bignums differently on different endian processors and d) hashes ** small integers with different weights on different bytes. ** ** make_hash: A hash function that will give the same values for the same ** terms regardless of the internal representation. Small integers are ** hashed using the same algorithm as bignums and bignums are hashed ** independent of the CPU endianess. ** Make_hash also hashes pids, ports and references like 32 bit numbers ** (but with different constants). ** make_hash() is called from the bif erlang:phash/2 ** ** The idea behind the hash algorithm is to produce values suitable for ** linear dynamic hashing. We cannot choose the range at all while hashing ** (it's not even supplied to the hashing functions). The good old algorithm ** [H = H*C+X mod M, where H is the hash value, C is a "random" constant(or M), ** M is the range, preferably a prime, and X is each byte value] is therefore ** modified to: ** H = H*C+X mod 2^32, where C is a large prime. This gives acceptable ** "spreading" of the hashes, so that later modulo calculations also will give ** acceptable "spreading" in the range. ** We really need to hash on bytes, otherwise the ** upper bytes of a word will be less significant than the lower ones. That's ** not acceptable at all. For internal use one could maybe optimize by using ** another hash function, that is less strict but faster. That is, however, not ** implemented. ** ** Short semi-formal description of make_hash: ** ** In make_hash, the number N is treated like this: ** Abs(N) is hashed bytewise with the least significant byte, B(0), first. ** The number of bytes (J) to calculate hash on in N is ** (the number of _32_ bit words needed to store the unsigned ** value of abs(N)) * 4. ** X = FUNNY_NUMBER2 ** If N < 0, Y = FUNNY_NUMBER4 else Y = FUNNY_NUMBER3. ** The hash value is Y*h(J) mod 2^32 where h(J) is calculated like ** h(0) = ** h(i) = h(i-i)*X + B(i-1) ** The above should hold regardless of internal representation. ** Pids are hashed like small numbers but with differrent constants, as are ** ports. ** References are hashed like ports but only on the least significant byte. ** Binaries are hashed on all bytes (not on the 15 first as in ** make_broken_hash()). ** Bytes in lists (possibly text strings) use a simpler multiplication inlined ** in the handling of lists, that is an optimization. ** Everything else is like in the old hash (make_broken_hash()). ** ** make_hash2() is faster than make_hash, in particular for bignums ** and binaries, and produces better hash values. */ /* some prime numbers just above 2 ^ 28 */ #define FUNNY_NUMBER1 268440163 #define FUNNY_NUMBER2 268439161 #define FUNNY_NUMBER3 268435459 #define FUNNY_NUMBER4 268436141 #define FUNNY_NUMBER5 268438633 #define FUNNY_NUMBER6 268437017 #define FUNNY_NUMBER7 268438039 #define FUNNY_NUMBER8 268437511 #define FUNNY_NUMBER9 268439627 #define FUNNY_NUMBER10 268440479 #define FUNNY_NUMBER11 268440577 #define FUNNY_NUMBER12 268440581 static Uint32 hash_binary_bytes(Eterm bin, Uint sz, Uint32 hash) { byte* ptr; Uint bitoffs; Uint bitsize; ERTS_GET_BINARY_BYTES(bin, ptr, bitoffs, bitsize); if (bitoffs == 0) { while (sz--) { hash = hash*FUNNY_NUMBER1 + *ptr++; } if (bitsize > 0) { byte b = *ptr; b >>= 8 - bitsize; hash = (hash*FUNNY_NUMBER1 + b) * FUNNY_NUMBER12 + bitsize; } } else { Uint previous = *ptr++; Uint b; Uint lshift = bitoffs; Uint rshift = 8 - lshift; while (sz--) { b = (previous << lshift) & 0xFF; previous = *ptr++; b |= previous >> rshift; hash = hash*FUNNY_NUMBER1 + b; } if (bitsize > 0) { b = (previous << lshift) & 0xFF; previous = *ptr++; b |= previous >> rshift; b >>= 8 - bitsize; hash = (hash*FUNNY_NUMBER1 + b) * FUNNY_NUMBER12 + bitsize; } } return hash; } Uint32 make_hash(Eterm term_arg) { DECLARE_WSTACK(stack); Eterm term = term_arg; Eterm hash = 0; unsigned op; /* Must not collide with the real tag_val_def's: */ #define MAKE_HASH_TUPLE_OP 0x10 #define MAKE_HASH_FUN_OP 0x11 #define MAKE_HASH_CDR_PRE_OP 0x12 #define MAKE_HASH_CDR_POST_OP 0x13 /* ** Convenience macro for calculating a bytewise hash on an unsigned 32 bit ** integer. ** If the endianess is known, we could be smarter here, ** but that gives no significant speedup (on a sparc at least) */ #define UINT32_HASH_STEP(Expr, Prime1) \ do { \ Uint32 x = (Uint32) (Expr); \ hash = \ (((((hash)*(Prime1) + (x & 0xFF)) * (Prime1) + \ ((x >> 8) & 0xFF)) * (Prime1) + \ ((x >> 16) & 0xFF)) * (Prime1) + \ (x >> 24)); \ } while(0) #define UINT32_HASH_RET(Expr, Prime1, Prime2) \ UINT32_HASH_STEP(Expr, Prime1); \ hash = hash * (Prime2); \ break /* * Significant additions needed for real 64 bit port with larger fixnums. */ /* * Note, for the simple 64bit port, not utilizing the * larger word size this function will work without modification. */ tail_recur: op = tag_val_def(term); for (;;) { switch (op) { case NIL_DEF: hash = hash*FUNNY_NUMBER3 + 1; break; case ATOM_DEF: hash = hash*FUNNY_NUMBER1 + (atom_tab(atom_val(term))->slot.bucket.hvalue); break; case SMALL_DEF: { Sint y1 = signed_val(term); Uint y2 = y1 < 0 ? -(Uint)y1 : y1; UINT32_HASH_STEP(y2, FUNNY_NUMBER2); #if defined(ARCH_64) && !HALFWORD_HEAP if (y2 >> 32) UINT32_HASH_STEP(y2 >> 32, FUNNY_NUMBER2); #endif hash *= (y1 < 0 ? FUNNY_NUMBER4 : FUNNY_NUMBER3); break; } case BINARY_DEF: { Uint sz = binary_size(term); hash = hash_binary_bytes(term, sz, hash); hash = hash*FUNNY_NUMBER4 + sz; break; } case EXPORT_DEF: { Export* ep = *((Export **) (export_val(term) + 1)); hash = hash * FUNNY_NUMBER11 + ep->code[2]; hash = hash*FUNNY_NUMBER1 + (atom_tab(atom_val(ep->code[0]))->slot.bucket.hvalue); hash = hash*FUNNY_NUMBER1 + (atom_tab(atom_val(ep->code[1]))->slot.bucket.hvalue); break; } case FUN_DEF: { ErlFunThing* funp = (ErlFunThing *) fun_val(term); Uint num_free = funp->num_free; hash = hash * FUNNY_NUMBER10 + num_free; hash = hash*FUNNY_NUMBER1 + (atom_tab(atom_val(funp->fe->module))->slot.bucket.hvalue); hash = hash*FUNNY_NUMBER2 + funp->fe->old_index; hash = hash*FUNNY_NUMBER2 + funp->fe->old_uniq; if (num_free > 0) { if (num_free > 1) { WSTACK_PUSH3(stack, (UWord) &funp->env[1], (num_free-1), MAKE_HASH_FUN_OP); } term = funp->env[0]; goto tail_recur; } break; } case PID_DEF: UINT32_HASH_RET(internal_pid_number(term),FUNNY_NUMBER5,FUNNY_NUMBER6); case EXTERNAL_PID_DEF: UINT32_HASH_RET(external_pid_number(term),FUNNY_NUMBER5,FUNNY_NUMBER6); case PORT_DEF: UINT32_HASH_RET(internal_port_number(term),FUNNY_NUMBER9,FUNNY_NUMBER10); case EXTERNAL_PORT_DEF: UINT32_HASH_RET(external_port_number(term),FUNNY_NUMBER9,FUNNY_NUMBER10); case REF_DEF: UINT32_HASH_RET(internal_ref_numbers(term)[0],FUNNY_NUMBER9,FUNNY_NUMBER10); case EXTERNAL_REF_DEF: UINT32_HASH_RET(external_ref_numbers(term)[0],FUNNY_NUMBER9,FUNNY_NUMBER10); case FLOAT_DEF: { FloatDef ff; GET_DOUBLE(term, ff); hash = hash*FUNNY_NUMBER6 + (ff.fw[0] ^ ff.fw[1]); break; } case MAKE_HASH_CDR_PRE_OP: term = (Eterm) WSTACK_POP(stack); if (is_not_list(term)) { WSTACK_PUSH(stack, (UWord) MAKE_HASH_CDR_POST_OP); goto tail_recur; } /* fall through */ case LIST_DEF: { Eterm* list = list_val(term); while(is_byte(*list)) { /* Optimization for strings. ** Note that this hash is different from a 'small' hash, ** as multiplications on a Sparc is so slow. */ hash = hash*FUNNY_NUMBER2 + unsigned_val(*list); if (is_not_list(CDR(list))) { WSTACK_PUSH(stack, MAKE_HASH_CDR_POST_OP); term = CDR(list); goto tail_recur; } list = list_val(CDR(list)); } WSTACK_PUSH2(stack, CDR(list), MAKE_HASH_CDR_PRE_OP); term = CAR(list); goto tail_recur; } case MAKE_HASH_CDR_POST_OP: hash *= FUNNY_NUMBER8; break; case BIG_DEF: /* Note that this is the exact same thing as the hashing of smalls.*/ { Eterm* ptr = big_val(term); Uint n = BIG_SIZE(ptr); Uint k = n-1; ErtsDigit d; int is_neg = BIG_SIGN(ptr); Uint i; int j; for (i = 0; i < k; i++) { d = BIG_DIGIT(ptr, i); for(j = 0; j < sizeof(ErtsDigit); ++j) { hash = (hash*FUNNY_NUMBER2) + (d & 0xff); d >>= 8; } } d = BIG_DIGIT(ptr, k); k = sizeof(ErtsDigit); #if defined(ARCH_64) && !HALFWORD_HEAP if (!(d >> 32)) k /= 2; #endif for(j = 0; j < (int)k; ++j) { hash = (hash*FUNNY_NUMBER2) + (d & 0xff); d >>= 8; } hash *= is_neg ? FUNNY_NUMBER4 : FUNNY_NUMBER3; break; } case TUPLE_DEF: { Eterm* ptr = tuple_val(term); Uint arity = arityval(*ptr); WSTACK_PUSH3(stack, (UWord) arity, (UWord)(ptr+1), (UWord) arity); op = MAKE_HASH_TUPLE_OP; }/*fall through*/ case MAKE_HASH_TUPLE_OP: case MAKE_HASH_FUN_OP: { Uint i = (Uint) WSTACK_POP(stack); Eterm* ptr = (Eterm*) WSTACK_POP(stack); if (i != 0) { term = *ptr; WSTACK_PUSH3(stack, (UWord)(ptr+1), (UWord) i-1, (UWord) op); goto tail_recur; } if (op == MAKE_HASH_TUPLE_OP) { Uint32 arity = (Uint32) WSTACK_POP(stack); hash = hash*FUNNY_NUMBER9 + arity; } break; } default: erl_exit(1, "Invalid tag in make_hash(0x%X,0x%X)\n", term, op); return 0; } if (WSTACK_ISEMPTY(stack)) break; op = WSTACK_POP(stack); } DESTROY_WSTACK(stack); return hash; #undef UINT32_HASH_STEP #undef UINT32_HASH_RET } /* Hash function suggested by Bob Jenkins. */ #define MIX(a,b,c) \ do { \ a -= b; a -= c; a ^= (c>>13); \ b -= c; b -= a; b ^= (a<<8); \ c -= a; c -= b; c ^= (b>>13); \ a -= b; a -= c; a ^= (c>>12); \ b -= c; b -= a; b ^= (a<<16); \ c -= a; c -= b; c ^= (b>>5); \ a -= b; a -= c; a ^= (c>>3); \ b -= c; b -= a; b ^= (a<<10); \ c -= a; c -= b; c ^= (b>>15); \ } while(0) #define HCONST 0x9e3779b9UL /* the golden ratio; an arbitrary value */ Uint32 block_hash(byte *k, unsigned length, Uint32 initval) { Uint32 a,b,c; unsigned len; /* Set up the internal state */ len = length; a = b = HCONST; c = initval; /* the previous hash value */ while (len >= 12) { a += (k[0] +((Uint32)k[1]<<8) +((Uint32)k[2]<<16) +((Uint32)k[3]<<24)); b += (k[4] +((Uint32)k[5]<<8) +((Uint32)k[6]<<16) +((Uint32)k[7]<<24)); c += (k[8] +((Uint32)k[9]<<8) +((Uint32)k[10]<<16)+((Uint32)k[11]<<24)); MIX(a,b,c); k += 12; len -= 12; } c += length; switch(len) /* all the case statements fall through */ { case 11: c+=((Uint32)k[10]<<24); case 10: c+=((Uint32)k[9]<<16); case 9 : c+=((Uint32)k[8]<<8); /* the first byte of c is reserved for the length */ case 8 : b+=((Uint32)k[7]<<24); case 7 : b+=((Uint32)k[6]<<16); case 6 : b+=((Uint32)k[5]<<8); case 5 : b+=k[4]; case 4 : a+=((Uint32)k[3]<<24); case 3 : a+=((Uint32)k[2]<<16); case 2 : a+=((Uint32)k[1]<<8); case 1 : a+=k[0]; /* case 0: nothing left to add */ } MIX(a,b,c); return c; } Uint32 make_hash2(Eterm term) { Uint32 hash; DeclareTmpHeapNoproc(tmp_big,2); /* (HCONST * {2, ..., 14}) mod 2^32 */ #define HCONST_2 0x3c6ef372UL #define HCONST_3 0xdaa66d2bUL #define HCONST_4 0x78dde6e4UL #define HCONST_5 0x1715609dUL #define HCONST_6 0xb54cda56UL #define HCONST_7 0x5384540fUL #define HCONST_8 0xf1bbcdc8UL #define HCONST_9 0x8ff34781UL #define HCONST_10 0x2e2ac13aUL #define HCONST_11 0xcc623af3UL #define HCONST_12 0x6a99b4acUL #define HCONST_13 0x08d12e65UL #define HCONST_14 0xa708a81eUL #define HCONST_15 0x454021d7UL #define UINT32_HASH_2(Expr1, Expr2, AConst) \ do { \ Uint32 a,b; \ a = AConst + (Uint32) (Expr1); \ b = AConst + (Uint32) (Expr2); \ MIX(a,b,hash); \ } while(0) #define UINT32_HASH(Expr, AConst) UINT32_HASH_2(Expr, 0, AConst) #define SINT32_HASH(Expr, AConst) \ do { \ Sint32 y = (Sint32) (Expr); \ if (y < 0) { \ UINT32_HASH(-y, AConst); \ /* Negative numbers are unnecessarily mixed twice. */ \ } \ UINT32_HASH(y, AConst); \ } while(0) #define IS_SSMALL28(x) (((Uint) (((x) >> (28-1)) + 1)) < 2) /* Optimization. Simple cases before declaration of estack. */ if (primary_tag(term) == TAG_PRIMARY_IMMED1) { switch (term & _TAG_IMMED1_MASK) { case _TAG_IMMED1_IMMED2: switch (term & _TAG_IMMED2_MASK) { case _TAG_IMMED2_ATOM: /* Fast, but the poor hash value should be mixed. */ return atom_tab(atom_val(term))->slot.bucket.hvalue; } break; case _TAG_IMMED1_SMALL: { Sint x = signed_val(term); if (SMALL_BITS > 28 && !IS_SSMALL28(x)) { term = small_to_big(x, tmp_big); break; } hash = 0; SINT32_HASH(x, HCONST); return hash; } } }; { Eterm tmp; DECLARE_ESTACK(s); UseTmpHeapNoproc(2); hash = 0; for (;;) { switch (primary_tag(term)) { case TAG_PRIMARY_LIST: { int c = 0; Uint32 sh = 0; Eterm* ptr = list_val(term); while (is_byte(*ptr)) { /* Optimization for strings. */ sh = (sh << 8) + unsigned_val(*ptr); if (c == 3) { UINT32_HASH(sh, HCONST_4); c = sh = 0; } else { c++; } term = CDR(ptr); if (is_not_list(term)) break; ptr = list_val(term); } if (c > 0) UINT32_HASH(sh, HCONST_4); if (is_list(term)) { term = *ptr; tmp = *++ptr; ESTACK_PUSH(s, tmp); } } break; case TAG_PRIMARY_BOXED: { Eterm hdr = *boxed_val(term); ASSERT(is_header(hdr)); switch (hdr & _TAG_HEADER_MASK) { case ARITYVAL_SUBTAG: { int i; int arity = header_arity(hdr); Eterm* elem = tuple_val(term); UINT32_HASH(arity, HCONST_9); if (arity == 0) /* Empty tuple */ goto hash2_common; for (i = arity; i >= 2; i--) { tmp = elem[i]; ESTACK_PUSH(s, tmp); } term = elem[1]; } break; case EXPORT_SUBTAG: { Export* ep = *((Export **) (export_val(term) + 1)); UINT32_HASH_2 (ep->code[2], atom_tab(atom_val(ep->code[0]))->slot.bucket.hvalue, HCONST); UINT32_HASH (atom_tab(atom_val(ep->code[1]))->slot.bucket.hvalue, HCONST_14); goto hash2_common; } case FUN_SUBTAG: { ErlFunThing* funp = (ErlFunThing *) fun_val(term); Uint num_free = funp->num_free; UINT32_HASH_2 (num_free, atom_tab(atom_val(funp->fe->module))->slot.bucket.hvalue, HCONST); UINT32_HASH_2 (funp->fe->old_index, funp->fe->old_uniq, HCONST); if (num_free == 0) { goto hash2_common; } else { Eterm* bptr = funp->env + num_free - 1; while (num_free-- > 1) { term = *bptr--; ESTACK_PUSH(s, term); } term = *bptr; } } break; case REFC_BINARY_SUBTAG: case HEAP_BINARY_SUBTAG: case SUB_BINARY_SUBTAG: { byte* bptr; unsigned sz = binary_size(term); Uint32 con = HCONST_13 + hash; Uint bitoffs; Uint bitsize; ERTS_GET_BINARY_BYTES(term, bptr, bitoffs, bitsize); if (sz == 0 && bitsize == 0) { hash = con; } else { if (bitoffs == 0) { hash = block_hash(bptr, sz, con); if (bitsize > 0) { UINT32_HASH_2(bitsize, (bptr[sz] >> (8 - bitsize)), HCONST_15); } } else { byte* buf = (byte *) erts_alloc(ERTS_ALC_T_TMP, sz + (bitsize != 0)); erts_copy_bits(bptr, bitoffs, 1, buf, 0, 1, sz*8+bitsize); hash = block_hash(buf, sz, con); if (bitsize > 0) { UINT32_HASH_2(bitsize, (buf[sz] >> (8 - bitsize)), HCONST_15); } erts_free(ERTS_ALC_T_TMP, (void *) buf); } } goto hash2_common; } break; case POS_BIG_SUBTAG: case NEG_BIG_SUBTAG: { Eterm* ptr = big_val(term); Uint i = 0; Uint n = BIG_SIZE(ptr); Uint32 con = BIG_SIGN(ptr) ? HCONST_10 : HCONST_11; #if D_EXP == 16 do { Uint32 x, y; x = i < n ? BIG_DIGIT(ptr, i++) : 0; x += (Uint32)(i < n ? BIG_DIGIT(ptr, i++) : 0) << 16; y = i < n ? BIG_DIGIT(ptr, i++) : 0; y += (Uint32)(i < n ? BIG_DIGIT(ptr, i++) : 0) << 16; UINT32_HASH_2(x, y, con); } while (i < n); #elif D_EXP == 32 do { Uint32 x, y; x = i < n ? BIG_DIGIT(ptr, i++) : 0; y = i < n ? BIG_DIGIT(ptr, i++) : 0; UINT32_HASH_2(x, y, con); } while (i < n); #elif D_EXP == 64 do { Uint t; Uint32 x, y; t = i < n ? BIG_DIGIT(ptr, i++) : 0; x = t & 0xffffffff; y = t >> 32; UINT32_HASH_2(x, y, con); } while (i < n); #else #error "unsupported D_EXP size" #endif goto hash2_common; } break; case REF_SUBTAG: /* All parts of the ref should be hashed. */ UINT32_HASH(internal_ref_numbers(term)[0], HCONST_7); goto hash2_common; break; case EXTERNAL_REF_SUBTAG: /* All parts of the ref should be hashed. */ UINT32_HASH(external_ref_numbers(term)[0], HCONST_7); goto hash2_common; break; case EXTERNAL_PID_SUBTAG: /* Only 15 bits are hashed. */ UINT32_HASH(external_pid_number(term), HCONST_5); goto hash2_common; case EXTERNAL_PORT_SUBTAG: /* Only 15 bits are hashed. */ UINT32_HASH(external_port_number(term), HCONST_6); goto hash2_common; case FLOAT_SUBTAG: { FloatDef ff; GET_DOUBLE(term, ff); #if defined(WORDS_BIGENDIAN) UINT32_HASH_2(ff.fw[0], ff.fw[1], HCONST_12); #else UINT32_HASH_2(ff.fw[1], ff.fw[0], HCONST_12); #endif goto hash2_common; } break; default: erl_exit(1, "Invalid tag in make_hash2(0x%X)\n", term); } } break; case TAG_PRIMARY_IMMED1: switch (term & _TAG_IMMED1_MASK) { case _TAG_IMMED1_PID: /* Only 15 bits are hashed. */ UINT32_HASH(internal_pid_number(term), HCONST_5); goto hash2_common; case _TAG_IMMED1_PORT: /* Only 15 bits are hashed. */ UINT32_HASH(internal_port_number(term), HCONST_6); goto hash2_common; case _TAG_IMMED1_IMMED2: switch (term & _TAG_IMMED2_MASK) { case _TAG_IMMED2_ATOM: if (hash == 0) /* Fast, but the poor hash value should be mixed. */ hash = atom_tab(atom_val(term))->slot.bucket.hvalue; else UINT32_HASH(atom_tab(atom_val(term))->slot.bucket.hvalue, HCONST_3); goto hash2_common; case _TAG_IMMED2_NIL: if (hash == 0) hash = 3468870702UL; else UINT32_HASH(NIL_DEF, HCONST_2); goto hash2_common; default: erl_exit(1, "Invalid tag in make_hash2(0x%X)\n", term); } case _TAG_IMMED1_SMALL: { Sint x = signed_val(term); if (SMALL_BITS > 28 && !IS_SSMALL28(x)) { term = small_to_big(x, tmp_big); break; } SINT32_HASH(x, HCONST); goto hash2_common; } } break; default: erl_exit(1, "Invalid tag in make_hash2(0x%X)\n", term); hash2_common: if (ESTACK_ISEMPTY(s)) { DESTROY_ESTACK(s); UnUseTmpHeapNoproc(2); return hash; } term = ESTACK_POP(s); } } } #undef UINT32_HASH_2 #undef UINT32_HASH #undef SINT32_HASH } #undef HCONST #undef MIX Uint32 make_broken_hash(Eterm term) { Uint32 hash = 0; DECLARE_WSTACK(stack); unsigned op; tail_recur: op = tag_val_def(term); for (;;) { switch (op) { case NIL_DEF: hash = hash*FUNNY_NUMBER3 + 1; break; case ATOM_DEF: hash = hash*FUNNY_NUMBER1 + (atom_tab(atom_val(term))->slot.bucket.hvalue); break; case SMALL_DEF: #if defined(ARCH_64) && !HALFWORD_HEAP { Sint y1 = signed_val(term); Uint y2 = y1 < 0 ? -(Uint)y1 : y1; Uint32 y3 = (Uint32) (y2 >> 32); int arity = 1; #if defined(WORDS_BIGENDIAN) if (!IS_SSMALL28(y1)) { /* like a bignum */ Uint32 y4 = (Uint32) y2; hash = hash*FUNNY_NUMBER2 + ((y4 << 16) | (y4 >> 16)); if (y3) { hash = hash*FUNNY_NUMBER2 + ((y3 << 16) | (y3 >> 16)); arity++; } hash = hash * (y1 < 0 ? FUNNY_NUMBER3 : FUNNY_NUMBER2) + arity; } else { hash = hash*FUNNY_NUMBER2 + (((Uint) y1) & 0xfffffff); } #else if (!IS_SSMALL28(y1)) { /* like a bignum */ hash = hash*FUNNY_NUMBER2 + ((Uint32) y2); if (y3) { hash = hash*FUNNY_NUMBER2 + y3; arity++; } hash = hash * (y1 < 0 ? FUNNY_NUMBER3 : FUNNY_NUMBER2) + arity; } else { hash = hash*FUNNY_NUMBER2 + (((Uint) y1) & 0xfffffff); } #endif } #else hash = hash*FUNNY_NUMBER2 + unsigned_val(term); #endif break; case BINARY_DEF: { size_t sz = binary_size(term); size_t i = (sz < 15) ? sz : 15; hash = hash_binary_bytes(term, i, hash); hash = hash*FUNNY_NUMBER4 + sz; break; } case EXPORT_DEF: { Export* ep = *((Export **) (export_val(term) + 1)); hash = hash * FUNNY_NUMBER11 + ep->code[2]; hash = hash*FUNNY_NUMBER1 + (atom_tab(atom_val(ep->code[0]))->slot.bucket.hvalue); hash = hash*FUNNY_NUMBER1 + (atom_tab(atom_val(ep->code[1]))->slot.bucket.hvalue); break; } case FUN_DEF: { ErlFunThing* funp = (ErlFunThing *) fun_val(term); Uint num_free = funp->num_free; hash = hash * FUNNY_NUMBER10 + num_free; hash = hash*FUNNY_NUMBER1 + (atom_tab(atom_val(funp->fe->module))->slot.bucket.hvalue); hash = hash*FUNNY_NUMBER2 + funp->fe->old_index; hash = hash*FUNNY_NUMBER2 + funp->fe->old_uniq; if (num_free > 0) { if (num_free > 1) { WSTACK_PUSH3(stack, (UWord) &funp->env[1], (num_free-1), MAKE_HASH_FUN_OP); } term = funp->env[0]; goto tail_recur; } break; } case PID_DEF: hash = hash*FUNNY_NUMBER5 + internal_pid_number(term); break; case EXTERNAL_PID_DEF: hash = hash*FUNNY_NUMBER5 + external_pid_number(term); break; case PORT_DEF: hash = hash*FUNNY_NUMBER9 + internal_port_number(term); break; case EXTERNAL_PORT_DEF: hash = hash*FUNNY_NUMBER9 + external_port_number(term); break; case REF_DEF: hash = hash*FUNNY_NUMBER9 + internal_ref_numbers(term)[0]; break; case EXTERNAL_REF_DEF: hash = hash*FUNNY_NUMBER9 + external_ref_numbers(term)[0]; break; case FLOAT_DEF: { FloatDef ff; GET_DOUBLE(term, ff); hash = hash*FUNNY_NUMBER6 + (ff.fw[0] ^ ff.fw[1]); } break; case MAKE_HASH_CDR_PRE_OP: term = (Eterm) WSTACK_POP(stack); if (is_not_list(term)) { WSTACK_PUSH(stack, (UWord) MAKE_HASH_CDR_POST_OP); goto tail_recur; } /*fall through*/ case LIST_DEF: { Eterm* list = list_val(term); WSTACK_PUSH2(stack, (UWord) CDR(list), (UWord) MAKE_HASH_CDR_PRE_OP); term = CAR(list); goto tail_recur; } case MAKE_HASH_CDR_POST_OP: hash *= FUNNY_NUMBER8; break; case BIG_DEF: { Eterm* ptr = big_val(term); int is_neg = BIG_SIGN(ptr); Uint arity = BIG_ARITY(ptr); Uint i = arity; ptr++; #if D_EXP == 16 /* hash over 32 bit LE */ while(i--) { hash = hash*FUNNY_NUMBER2 + *ptr++; } #elif D_EXP == 32 #if defined(WORDS_BIGENDIAN) while(i--) { Uint d = *ptr++; hash = hash*FUNNY_NUMBER2 + ((d << 16) | (d >> 16)); } #else while(i--) { hash = hash*FUNNY_NUMBER2 + *ptr++; } #endif #elif D_EXP == 64 { Uint32 h = 0, l; #if defined(WORDS_BIGENDIAN) while(i--) { Uint d = *ptr++; l = d & 0xffffffff; h = d >> 32; hash = hash*FUNNY_NUMBER2 + ((l << 16) | (l >> 16)); if (h || i) hash = hash*FUNNY_NUMBER2 + ((h << 16) | (h >> 16)); } #else while(i--) { Uint d = *ptr++; l = d & 0xffffffff; h = d >> 32; hash = hash*FUNNY_NUMBER2 + l; if (h || i) hash = hash*FUNNY_NUMBER2 + h; } #endif /* adjust arity to match 32 bit mode */ arity = (arity << 1) - (h == 0); } #else #error "unsupported D_EXP size" #endif hash = hash * (is_neg ? FUNNY_NUMBER3 : FUNNY_NUMBER2) + arity; } break; case TUPLE_DEF: { Eterm* ptr = tuple_val(term); Uint arity = arityval(*ptr); WSTACK_PUSH3(stack, (UWord) arity, (UWord) (ptr+1), (UWord) arity); op = MAKE_HASH_TUPLE_OP; }/*fall through*/ case MAKE_HASH_TUPLE_OP: case MAKE_HASH_FUN_OP: { Uint i = (Uint) WSTACK_POP(stack); Eterm* ptr = (Eterm*) WSTACK_POP(stack); if (i != 0) { term = *ptr; WSTACK_PUSH3(stack, (UWord)(ptr+1), (UWord) i-1, (UWord) op); goto tail_recur; } if (op == MAKE_HASH_TUPLE_OP) { Uint32 arity = (UWord) WSTACK_POP(stack); hash = hash*FUNNY_NUMBER9 + arity; } break; } default: erl_exit(1, "Invalid tag in make_broken_hash\n"); return 0; } if (WSTACK_ISEMPTY(stack)) break; op = (Uint) WSTACK_POP(stack); } DESTROY_WSTACK(stack); return hash; #undef MAKE_HASH_TUPLE_OP #undef MAKE_HASH_FUN_OP #undef MAKE_HASH_CDR_PRE_OP #undef MAKE_HASH_CDR_POST_OP } static int do_send_to_logger(Eterm tag, Eterm gleader, char *buf, int len) { /* error_logger ! {notify,{info_msg,gleader,{emulator,"~s~n",[]}}} | {notify,{error,gleader,{emulator,"~s~n",[]}}} | {notify,{warning_msg,gleader,{emulator,"~s~n",[}]}} */ Eterm* hp; Uint sz; Uint gl_sz; Eterm gl; Eterm list,plist,format,tuple1,tuple2,tuple3; ErlOffHeap *ohp; ErlHeapFragment *bp = NULL; #if !defined(ERTS_SMP) Process *p; #endif ASSERT(is_atom(tag)); if (len <= 0) { return -1; } #ifndef ERTS_SMP if ( #ifdef USE_THREADS !erts_get_scheduler_data() || /* Must be scheduler thread */ #endif (p = erts_whereis_process(NULL, 0, am_error_logger, 0, 0)) == NULL || p->status == P_RUNNING) { /* buf *always* points to a null terminated string */ erts_fprintf(stderr, "(no error logger present) %T: \"%s\"\n", tag, buf); return 0; } /* So we have an error logger, lets build the message */ #endif gl_sz = IS_CONST(gleader) ? 0 : size_object(gleader); sz = len * 2 /* message list */+ 2 /* cons surrounding message list */ + gl_sz + 3 /*outer 2-tuple*/ + 4 /* middle 3-tuple */ + 4 /*inner 3-tuple */ + 8 /* "~s~n" */; #ifndef ERTS_SMP if (sz <= HeapWordsLeft(p)) { ohp = &MSO(p); hp = HEAP_TOP(p); HEAP_TOP(p) += sz; } else { #endif bp = new_message_buffer(sz); ohp = &bp->off_heap; hp = bp->mem; #ifndef ERTS_SMP } #endif gl = (is_nil(gleader) ? am_noproc : (IS_CONST(gleader) ? gleader : copy_struct(gleader,gl_sz,&hp,ohp))); list = buf_to_intlist(&hp, buf, len, NIL); plist = CONS(hp,list,NIL); hp += 2; format = buf_to_intlist(&hp, "~s~n", 4, NIL); tuple1 = TUPLE3(hp, am_emulator, format, plist); hp += 4; tuple2 = TUPLE3(hp, tag, gl, tuple1); hp += 4; tuple3 = TUPLE2(hp, am_notify, tuple2); #ifdef HARDDEBUG erts_fprintf(stderr, "%T\n", tuple3); #endif #ifdef ERTS_SMP { Eterm from = erts_get_current_pid(); if (is_not_internal_pid(from)) from = NIL; erts_queue_error_logger_message(from, tuple3, bp); } #else erts_queue_message(p, NULL /* only used for smp build */, bp, tuple3, NIL); #endif return 0; } static ERTS_INLINE int send_info_to_logger(Eterm gleader, char *buf, int len) { return do_send_to_logger(am_info_msg, gleader, buf, len); } static ERTS_INLINE int send_warning_to_logger(Eterm gleader, char *buf, int len) { Eterm tag; switch (erts_error_logger_warnings) { case am_info: tag = am_info_msg; break; case am_warning: tag = am_warning_msg; break; default: tag = am_error; break; } return do_send_to_logger(tag, gleader, buf, len); } static ERTS_INLINE int send_error_to_logger(Eterm gleader, char *buf, int len) { return do_send_to_logger(am_error, gleader, buf, len); } #define LOGGER_DSBUF_INC_SZ 256 static erts_dsprintf_buf_t * grow_logger_dsbuf(erts_dsprintf_buf_t *dsbufp, size_t need) { size_t size; size_t free_size = dsbufp->size - dsbufp->str_len; ASSERT(dsbufp && dsbufp->str); if (need <= free_size) return dsbufp; size = need - free_size + LOGGER_DSBUF_INC_SZ; size = (((size + LOGGER_DSBUF_INC_SZ - 1) / LOGGER_DSBUF_INC_SZ) * LOGGER_DSBUF_INC_SZ); size += dsbufp->size; ASSERT(dsbufp->str_len + need <= size); dsbufp->str = (char *) erts_realloc(ERTS_ALC_T_LOGGER_DSBUF, (void *) dsbufp->str, size); dsbufp->size = size; return dsbufp; } erts_dsprintf_buf_t * erts_create_logger_dsbuf(void) { erts_dsprintf_buf_t init = ERTS_DSPRINTF_BUF_INITER(grow_logger_dsbuf); erts_dsprintf_buf_t *dsbufp = erts_alloc(ERTS_ALC_T_LOGGER_DSBUF, sizeof(erts_dsprintf_buf_t)); sys_memcpy((void *) dsbufp, (void *) &init, sizeof(erts_dsprintf_buf_t)); dsbufp->str = (char *) erts_alloc(ERTS_ALC_T_LOGGER_DSBUF, LOGGER_DSBUF_INC_SZ); dsbufp->str[0] = '\0'; dsbufp->size = LOGGER_DSBUF_INC_SZ; return dsbufp; } static ERTS_INLINE void destroy_logger_dsbuf(erts_dsprintf_buf_t *dsbufp) { ASSERT(dsbufp && dsbufp->str); erts_free(ERTS_ALC_T_LOGGER_DSBUF, (void *) dsbufp->str); erts_free(ERTS_ALC_T_LOGGER_DSBUF, (void *) dsbufp); } int erts_send_info_to_logger(Eterm gleader, erts_dsprintf_buf_t *dsbufp) { int res; res = send_info_to_logger(gleader, dsbufp->str, dsbufp->str_len); destroy_logger_dsbuf(dsbufp); return res; } int erts_send_warning_to_logger(Eterm gleader, erts_dsprintf_buf_t *dsbufp) { int res; res = send_warning_to_logger(gleader, dsbufp->str, dsbufp->str_len); destroy_logger_dsbuf(dsbufp); return res; } int erts_send_error_to_logger(Eterm gleader, erts_dsprintf_buf_t *dsbufp) { int res; res = send_error_to_logger(gleader, dsbufp->str, dsbufp->str_len); destroy_logger_dsbuf(dsbufp); return res; } int erts_send_info_to_logger_str(Eterm gleader, char *str) { return send_info_to_logger(gleader, str, sys_strlen(str)); } int erts_send_warning_to_logger_str(Eterm gleader, char *str) { return send_warning_to_logger(gleader, str, sys_strlen(str)); } int erts_send_error_to_logger_str(Eterm gleader, char *str) { return send_error_to_logger(gleader, str, sys_strlen(str)); } int erts_send_info_to_logger_nogl(erts_dsprintf_buf_t *dsbuf) { return erts_send_info_to_logger(NIL, dsbuf); } int erts_send_warning_to_logger_nogl(erts_dsprintf_buf_t *dsbuf) { return erts_send_warning_to_logger(NIL, dsbuf); } int erts_send_error_to_logger_nogl(erts_dsprintf_buf_t *dsbuf) { return erts_send_error_to_logger(NIL, dsbuf); } int erts_send_info_to_logger_str_nogl(char *str) { return erts_send_info_to_logger_str(NIL, str); } int erts_send_warning_to_logger_str_nogl(char *str) { return erts_send_warning_to_logger_str(NIL, str); } int erts_send_error_to_logger_str_nogl(char *str) { return erts_send_error_to_logger_str(NIL, str); } #define TMP_DSBUF_INC_SZ 256 static erts_dsprintf_buf_t * grow_tmp_dsbuf(erts_dsprintf_buf_t *dsbufp, size_t need) { size_t size; size_t free_size = dsbufp->size - dsbufp->str_len; ASSERT(dsbufp); if (need <= free_size) return dsbufp; size = need - free_size + TMP_DSBUF_INC_SZ; size = ((size + TMP_DSBUF_INC_SZ - 1)/TMP_DSBUF_INC_SZ)*TMP_DSBUF_INC_SZ; size += dsbufp->size; ASSERT(dsbufp->str_len + need <= size); dsbufp->str = (char *) erts_realloc(ERTS_ALC_T_TMP_DSBUF, (void *) dsbufp->str, size); dsbufp->size = size; return dsbufp; } erts_dsprintf_buf_t * erts_create_tmp_dsbuf(Uint size) { Uint init_size = size ? size : TMP_DSBUF_INC_SZ; erts_dsprintf_buf_t init = ERTS_DSPRINTF_BUF_INITER(grow_tmp_dsbuf); erts_dsprintf_buf_t *dsbufp = erts_alloc(ERTS_ALC_T_TMP_DSBUF, sizeof(erts_dsprintf_buf_t)); sys_memcpy((void *) dsbufp, (void *) &init, sizeof(erts_dsprintf_buf_t)); dsbufp->str = (char *) erts_alloc(ERTS_ALC_T_TMP_DSBUF, init_size); dsbufp->str[0] = '\0'; dsbufp->size = init_size; return dsbufp; } void erts_destroy_tmp_dsbuf(erts_dsprintf_buf_t *dsbufp) { if (dsbufp->str) erts_free(ERTS_ALC_T_TMP_DSBUF, (void *) dsbufp->str); erts_free(ERTS_ALC_T_TMP_DSBUF, (void *) dsbufp); } /* eq and cmp are written as separate functions a eq is a little faster */ /* * Test for equality of two terms. * Returns 0 if not equal, or a non-zero value otherwise. */ #if HALFWORD_HEAP int eq_rel(Eterm a, Eterm* a_base, Eterm b, Eterm* b_base) #else int eq(Eterm a, Eterm b) #endif { DECLARE_WSTACK(stack); Sint sz; Eterm* aa; Eterm* bb; tailrecur: if (is_same(a, a_base, b, b_base)) goto pop_next; tailrecur_ne: switch (primary_tag(a)) { case TAG_PRIMARY_LIST: if (is_list(b)) { Eterm* aval = list_val_rel(a, a_base); Eterm* bval = list_val_rel(b, b_base); while (1) { Eterm atmp = CAR(aval); Eterm btmp = CAR(bval); if (!is_same(atmp,a_base,btmp,b_base)) { WSTACK_PUSH2(stack,(UWord) CDR(bval),(UWord) CDR(aval)); a = atmp; b = btmp; goto tailrecur_ne; } atmp = CDR(aval); btmp = CDR(bval); if (is_same(atmp,a_base,btmp,b_base)) { goto pop_next; } if (is_not_list(atmp) || is_not_list(btmp)) { a = atmp; b = btmp; goto tailrecur_ne; } aval = list_val_rel(atmp, a_base); bval = list_val_rel(btmp, b_base); } } break; /* not equal */ case TAG_PRIMARY_BOXED: { Eterm hdr = *boxed_val_rel(a,a_base); switch (hdr & _TAG_HEADER_MASK) { case ARITYVAL_SUBTAG: { aa = tuple_val_rel(a, a_base); if (!is_boxed(b) || *boxed_val_rel(b,b_base) != *aa) goto not_equal; bb = tuple_val_rel(b,b_base); if ((sz = arityval(*aa)) == 0) goto pop_next; ++aa; ++bb; goto term_array; } case REFC_BINARY_SUBTAG: case HEAP_BINARY_SUBTAG: case SUB_BINARY_SUBTAG: { byte* a_ptr; byte* b_ptr; size_t a_size; size_t b_size; Uint a_bitsize; Uint b_bitsize; Uint a_bitoffs; Uint b_bitoffs; if (!is_binary_rel(b,b_base)) { goto not_equal; } a_size = binary_size_rel(a,a_base); b_size = binary_size_rel(b,b_base); if (a_size != b_size) { goto not_equal; } ERTS_GET_BINARY_BYTES_REL(a, a_ptr, a_bitoffs, a_bitsize, a_base); ERTS_GET_BINARY_BYTES_REL(b, b_ptr, b_bitoffs, b_bitsize, b_base); if ((a_bitsize | b_bitsize | a_bitoffs | b_bitoffs) == 0) { if (sys_memcmp(a_ptr, b_ptr, a_size) == 0) goto pop_next; } else if (a_bitsize == b_bitsize) { if (erts_cmp_bits(a_ptr, a_bitoffs, b_ptr, b_bitoffs, (a_size << 3) + a_bitsize) == 0) goto pop_next; } break; /* not equal */ } case EXPORT_SUBTAG: { if (is_export_rel(b,b_base)) { Export* a_exp = *((Export **) (export_val_rel(a,a_base) + 1)); Export* b_exp = *((Export **) (export_val_rel(b,b_base) + 1)); if (a_exp == b_exp) goto pop_next; } break; /* not equal */ } case FUN_SUBTAG: { ErlFunThing* f1; ErlFunThing* f2; if (!is_fun_rel(b,b_base)) goto not_equal; f1 = (ErlFunThing *) fun_val_rel(a,a_base); f2 = (ErlFunThing *) fun_val_rel(b,b_base); if (f1->fe->module != f2->fe->module || f1->fe->old_index != f2->fe->old_index || f1->fe->old_uniq != f2->fe->old_uniq || f1->num_free != f2->num_free) { goto not_equal; } if ((sz = f1->num_free) == 0) goto pop_next; aa = f1->env; bb = f2->env; goto term_array; } case EXTERNAL_PID_SUBTAG: case EXTERNAL_PORT_SUBTAG: { ExternalThing *ap; ExternalThing *bp; if(!is_external_rel(b,b_base)) goto not_equal; ap = external_thing_ptr_rel(a,a_base); bp = external_thing_ptr_rel(b,b_base); if(ap->header == bp->header && ap->node == bp->node) { ASSERT(1 == external_data_words_rel(a,a_base)); ASSERT(1 == external_data_words_rel(b,b_base)); if (ap->data.ui[0] == bp->data.ui[0]) goto pop_next; } break; /* not equal */ } case EXTERNAL_REF_SUBTAG: { /* * Observe! * When comparing refs we need to compare ref numbers * (32-bit words) *not* ref data words. */ Uint32 *anum; Uint32 *bnum; Uint common_len; Uint alen; Uint blen; Uint i; ExternalThing* athing; ExternalThing* bthing; if(!is_external_ref_rel(b,b_base)) goto not_equal; athing = external_thing_ptr_rel(a,a_base); bthing = external_thing_ptr_rel(b,b_base); if(athing->node != bthing->node) goto not_equal; anum = external_thing_ref_numbers(athing); bnum = external_thing_ref_numbers(bthing); alen = external_thing_ref_no_of_numbers(athing); blen = external_thing_ref_no_of_numbers(bthing); goto ref_common; case REF_SUBTAG: if (!is_internal_ref_rel(b,b_base)) goto not_equal; { RefThing* athing = ref_thing_ptr_rel(a,a_base); RefThing* bthing = ref_thing_ptr_rel(b,b_base); alen = internal_thing_ref_no_of_numbers(athing); blen = internal_thing_ref_no_of_numbers(bthing); anum = internal_thing_ref_numbers(athing); bnum = internal_thing_ref_numbers(bthing); } ref_common: ASSERT(alen > 0 && blen > 0); if (anum[0] != bnum[0]) goto not_equal; if (alen == 3 && blen == 3) { /* Most refs are of length 3 */ if (anum[1] == bnum[1] && anum[2] == bnum[2]) { goto pop_next; } else { goto not_equal; } } common_len = alen; if (blen < alen) common_len = blen; for (i = 1; i < common_len; i++) if (anum[i] != bnum[i]) goto not_equal; if(alen != blen) { if (alen > blen) { for (i = common_len; i < alen; i++) if (anum[i] != 0) goto not_equal; } else { for (i = common_len; i < blen; i++) if (bnum[i] != 0) goto not_equal; } } goto pop_next; } case POS_BIG_SUBTAG: case NEG_BIG_SUBTAG: { int i; if (!is_big_rel(b,b_base)) goto not_equal; aa = big_val_rel(a,a_base); bb = big_val_rel(b,b_base); if (*aa != *bb) goto not_equal; i = BIG_ARITY(aa); while(i--) { if (*++aa != *++bb) goto not_equal; } goto pop_next; } case FLOAT_SUBTAG: { FloatDef af; FloatDef bf; if (is_float_rel(b,b_base)) { GET_DOUBLE_REL(a, af, a_base); GET_DOUBLE_REL(b, bf, b_base); if (af.fd == bf.fd) goto pop_next; } break; /* not equal */ } } break; } } goto not_equal; term_array: /* arrays in 'aa' and 'bb', length in 'sz' */ ASSERT(sz != 0); { Eterm* ap = aa; Eterm* bp = bb; Sint i = sz; for (;;) { if (!is_same(*ap,a_base,*bp,b_base)) break; if (--i == 0) goto pop_next; ++ap; ++bp; } a = *ap; b = *bp; if (is_both_immed(a,b)) { goto not_equal; } if (i > 1) { /* push the rest */ WSTACK_PUSH3(stack, i-1, (UWord)(bp+1), ((UWord)(ap+1)) | TAG_PRIMARY_HEADER); /* We (ab)use TAG_PRIMARY_HEADER to recognize a term_array */ } goto tailrecur_ne; } pop_next: if (!WSTACK_ISEMPTY(stack)) { UWord something = WSTACK_POP(stack); if (primary_tag((Eterm) something) == TAG_PRIMARY_HEADER) { /* a term_array */ aa = (Eterm*) something; bb = (Eterm*) WSTACK_POP(stack); sz = WSTACK_POP(stack); goto term_array; } a = something; b = WSTACK_POP(stack); goto tailrecur; } DESTROY_WSTACK(stack); return 1; not_equal: DESTROY_WSTACK(stack); return 0; } /* * Lexically compare two strings of bytes (string s1 length l1 and s2 l2). * * s1 < s2 return -1 * s1 = s2 return 0 * s1 > s2 return +1 */ static int cmpbytes(byte *s1, int l1, byte *s2, int l2) { int i; i = 0; while((i < l1) && (i < l2)) { if (s1[i] < s2[i]) return(-1); if (s1[i] > s2[i]) return(1); i++; } if (l1 < l2) return(-1); if (l1 > l2) return(1); return(0); } /* * Compare objects. * Returns 0 if equal, a negative value if a < b, or a positive number a > b. * * According to the Erlang Standard, types are orderered as follows: * numbers < (characters) < atoms < refs < funs < ports < pids < * tuples < [] < conses < binaries. * * Note that characters are currently not implemented. * */ #define float_comp(x,y) (((x)<(y)) ? -1 : (((x)==(y)) ? 0 : 1)) static int cmp_atoms(Eterm a, Eterm b) { Atom *aa = atom_tab(atom_val(a)); Atom *bb = atom_tab(atom_val(b)); int diff = aa->ord0 - bb->ord0; if (diff) return diff; return cmpbytes(aa->name+3, aa->len-3, bb->name+3, bb->len-3); } #if HALFWORD_HEAP Sint cmp_rel(Eterm a, Eterm* a_base, Eterm b, Eterm* b_base) #else Sint cmp(Eterm a, Eterm b) #endif { DECLARE_WSTACK(stack); Eterm* aa; Eterm* bb; int i; Sint j; int a_tag; int b_tag; ErlNode *anode; ErlNode *bnode; Uint adata; Uint bdata; Uint alen; Uint blen; Uint32 *anum; Uint32 *bnum; #define RETURN_NEQ(cmp) { j=(cmp); ASSERT(j != 0); goto not_equal; } #define ON_CMP_GOTO(cmp) if ((j=(cmp)) == 0) goto pop_next; else goto not_equal #undef CMP_NODES #define CMP_NODES(AN, BN) \ do { \ if((AN) != (BN)) { \ if((AN)->sysname != (BN)->sysname) \ RETURN_NEQ(cmp_atoms((AN)->sysname, (BN)->sysname)); \ ASSERT((AN)->creation != (BN)->creation); \ RETURN_NEQ(((AN)->creation < (BN)->creation) ? -1 : 1); \ } \ } while (0) tailrecur: if (is_same(a,a_base,b,b_base)) { /* Equal values or pointers. */ goto pop_next; } tailrecur_ne: /* deal with majority (?) cases by brute-force */ if (is_atom(a)) { if (is_atom(b)) { ON_CMP_GOTO(cmp_atoms(a, b)); } } else if (is_both_small(a, b)) { ON_CMP_GOTO(signed_val(a) - signed_val(b)); } /* * Take care of cases where the types are the same. */ a_tag = 42; /* Suppress warning */ switch (primary_tag(a)) { case TAG_PRIMARY_IMMED1: switch ((a & _TAG_IMMED1_MASK) >> _TAG_PRIMARY_SIZE) { case (_TAG_IMMED1_PORT >> _TAG_PRIMARY_SIZE): if (is_internal_port(b)) { bnode = erts_this_node; bdata = internal_port_data(b); } else if (is_external_port_rel(b,b_base)) { bnode = external_port_node_rel(b,b_base); bdata = external_port_data_rel(b,b_base); } else { a_tag = PORT_DEF; goto mixed_types; } anode = erts_this_node; adata = internal_port_data(a); port_common: CMP_NODES(anode, bnode); ON_CMP_GOTO((Sint)(adata - bdata)); case (_TAG_IMMED1_PID >> _TAG_PRIMARY_SIZE): if (is_internal_pid(b)) { bnode = erts_this_node; bdata = internal_pid_data(b); } else if (is_external_pid_rel(b,b_base)) { bnode = external_pid_node_rel(b,b_base); bdata = external_pid_data_rel(b,b_base); } else { a_tag = PID_DEF; goto mixed_types; } anode = erts_this_node; adata = internal_pid_data(a); pid_common: if (adata != bdata) { RETURN_NEQ(adata < bdata ? -1 : 1); } CMP_NODES(anode, bnode); goto pop_next; case (_TAG_IMMED1_SMALL >> _TAG_PRIMARY_SIZE): a_tag = SMALL_DEF; goto mixed_types; case (_TAG_IMMED1_IMMED2 >> _TAG_PRIMARY_SIZE): { switch ((a & _TAG_IMMED2_MASK) >> _TAG_IMMED1_SIZE) { case (_TAG_IMMED2_ATOM >> _TAG_IMMED1_SIZE): a_tag = ATOM_DEF; goto mixed_types; case (_TAG_IMMED2_NIL >> _TAG_IMMED1_SIZE): a_tag = NIL_DEF; goto mixed_types; } } } case TAG_PRIMARY_LIST: if (is_not_list(b)) { a_tag = LIST_DEF; goto mixed_types; } aa = list_val_rel(a,a_base); bb = list_val_rel(b,b_base); while (1) { Eterm atmp = CAR(aa); Eterm btmp = CAR(bb); if (!is_same(atmp,a_base,btmp,b_base)) { WSTACK_PUSH2(stack,(UWord) CDR(bb),(UWord) CDR(aa)); a = atmp; b = btmp; goto tailrecur_ne; } atmp = CDR(aa); btmp = CDR(bb); if (is_same(atmp,a_base,btmp,b_base)) { goto pop_next; } if (is_not_list(atmp) || is_not_list(btmp)) { a = atmp; b = btmp; goto tailrecur_ne; } aa = list_val_rel(atmp,a_base); bb = list_val_rel(btmp,b_base); } case TAG_PRIMARY_BOXED: { Eterm ahdr = *boxed_val_rel(a,a_base); switch ((ahdr & _TAG_HEADER_MASK) >> _TAG_PRIMARY_SIZE) { case (_TAG_HEADER_ARITYVAL >> _TAG_PRIMARY_SIZE): if (!is_tuple_rel(b,b_base)) { a_tag = TUPLE_DEF; goto mixed_types; } aa = tuple_val_rel(a,a_base); bb = tuple_val_rel(b,b_base); /* compare the arities */ i = arityval(ahdr); /* get the arity*/ if (i != arityval(*bb)) { RETURN_NEQ((int)(i - arityval(*bb))); } if (i == 0) { goto pop_next; } ++aa; ++bb; goto term_array; case (_TAG_HEADER_FLOAT >> _TAG_PRIMARY_SIZE): if (!is_float_rel(b,b_base)) { a_tag = FLOAT_DEF; goto mixed_types; } else { FloatDef af; FloatDef bf; GET_DOUBLE_REL(a, af, a_base); GET_DOUBLE_REL(b, bf, b_base); ON_CMP_GOTO(float_comp(af.fd, bf.fd)); } case (_TAG_HEADER_POS_BIG >> _TAG_PRIMARY_SIZE): case (_TAG_HEADER_NEG_BIG >> _TAG_PRIMARY_SIZE): if (!is_big_rel(b,b_base)) { a_tag = BIG_DEF; goto mixed_types; } ON_CMP_GOTO(big_comp(rterm2wterm(a,a_base), rterm2wterm(b,b_base))); case (_TAG_HEADER_EXPORT >> _TAG_PRIMARY_SIZE): if (!is_export_rel(b,b_base)) { a_tag = EXPORT_DEF; goto mixed_types; } else { Export* a_exp = *((Export **) (export_val_rel(a,a_base) + 1)); Export* b_exp = *((Export **) (export_val_rel(b,b_base) + 1)); if ((j = cmp_atoms(a_exp->code[0], b_exp->code[0])) != 0) { RETURN_NEQ(j); } if ((j = cmp_atoms(a_exp->code[1], b_exp->code[1])) != 0) { RETURN_NEQ(j); } ON_CMP_GOTO((Sint) a_exp->code[2] - (Sint) b_exp->code[2]); } break; case (_TAG_HEADER_FUN >> _TAG_PRIMARY_SIZE): if (!is_fun_rel(b,b_base)) { a_tag = FUN_DEF; goto mixed_types; } else { ErlFunThing* f1 = (ErlFunThing *) fun_val_rel(a,a_base); ErlFunThing* f2 = (ErlFunThing *) fun_val_rel(b,b_base); Sint diff; diff = cmpbytes(atom_tab(atom_val(f1->fe->module))->name, atom_tab(atom_val(f1->fe->module))->len, atom_tab(atom_val(f2->fe->module))->name, atom_tab(atom_val(f2->fe->module))->len); if (diff != 0) { RETURN_NEQ(diff); } diff = f1->fe->old_index - f2->fe->old_index; if (diff != 0) { RETURN_NEQ(diff); } diff = f1->fe->old_uniq - f2->fe->old_uniq; if (diff != 0) { RETURN_NEQ(diff); } diff = f1->num_free - f2->num_free; if (diff != 0) { RETURN_NEQ(diff); } i = f1->num_free; if (i == 0) goto pop_next; aa = f1->env; bb = f2->env; goto term_array; } case (_TAG_HEADER_EXTERNAL_PID >> _TAG_PRIMARY_SIZE): if (is_internal_pid(b)) { bnode = erts_this_node; bdata = internal_pid_data(b); } else if (is_external_pid_rel(b,b_base)) { bnode = external_pid_node_rel(b,b_base); bdata = external_pid_data_rel(b,b_base); } else { a_tag = EXTERNAL_PID_DEF; goto mixed_types; } anode = external_pid_node_rel(a,a_base); adata = external_pid_data_rel(a,a_base); goto pid_common; case (_TAG_HEADER_EXTERNAL_PORT >> _TAG_PRIMARY_SIZE): if (is_internal_port(b)) { bnode = erts_this_node; bdata = internal_port_data(b); } else if (is_external_port_rel(b,b_base)) { bnode = external_port_node_rel(b,b_base); bdata = external_port_data_rel(b,b_base); } else { a_tag = EXTERNAL_PORT_DEF; goto mixed_types; } anode = external_port_node_rel(a,a_base); adata = external_port_data_rel(a,a_base); goto port_common; case (_TAG_HEADER_REF >> _TAG_PRIMARY_SIZE): /* * Note! When comparing refs we need to compare ref numbers * (32-bit words), *not* ref data words. */ if (is_internal_ref_rel(b,b_base)) { RefThing* bthing = ref_thing_ptr_rel(b,b_base); bnode = erts_this_node; bnum = internal_thing_ref_numbers(bthing); blen = internal_thing_ref_no_of_numbers(bthing); } else if(is_external_ref_rel(b,b_base)) { ExternalThing* bthing = external_thing_ptr_rel(b,b_base); bnode = bthing->node; bnum = external_thing_ref_numbers(bthing); blen = external_thing_ref_no_of_numbers(bthing); } else { a_tag = REF_DEF; goto mixed_types; } { RefThing* athing = ref_thing_ptr_rel(a,a_base); anode = erts_this_node; anum = internal_thing_ref_numbers(athing); alen = internal_thing_ref_no_of_numbers(athing); } ref_common: CMP_NODES(anode, bnode); ASSERT(alen > 0 && blen > 0); if (alen != blen) { if (alen > blen) { do { if (anum[alen - 1] != 0) RETURN_NEQ(1); alen--; } while (alen > blen); } else { do { if (bnum[blen - 1] != 0) RETURN_NEQ(-1); blen--; } while (alen < blen); } } ASSERT(alen == blen); for (i = (Sint) alen - 1; i >= 0; i--) if (anum[i] != bnum[i]) RETURN_NEQ((Sint32) (anum[i] - bnum[i])); goto pop_next; case (_TAG_HEADER_EXTERNAL_REF >> _TAG_PRIMARY_SIZE): if (is_internal_ref_rel(b,b_base)) { RefThing* bthing = ref_thing_ptr_rel(b,b_base); bnode = erts_this_node; bnum = internal_thing_ref_numbers(bthing); blen = internal_thing_ref_no_of_numbers(bthing); } else if (is_external_ref_rel(b,b_base)) { ExternalThing* bthing = external_thing_ptr_rel(b,b_base); bnode = bthing->node; bnum = external_thing_ref_numbers(bthing); blen = external_thing_ref_no_of_numbers(bthing); } else { a_tag = EXTERNAL_REF_DEF; goto mixed_types; } { ExternalThing* athing = external_thing_ptr_rel(a,a_base); anode = athing->node; anum = external_thing_ref_numbers(athing); alen = external_thing_ref_no_of_numbers(athing); } goto ref_common; default: /* Must be a binary */ ASSERT(is_binary_rel(a,a_base)); if (!is_binary_rel(b,b_base)) { a_tag = BINARY_DEF; goto mixed_types; } else { Uint a_size = binary_size_rel(a,a_base); Uint b_size = binary_size_rel(b,b_base); Uint a_bitsize; Uint b_bitsize; Uint a_bitoffs; Uint b_bitoffs; Uint min_size; int cmp; byte* a_ptr; byte* b_ptr; ERTS_GET_BINARY_BYTES_REL(a, a_ptr, a_bitoffs, a_bitsize, a_base); ERTS_GET_BINARY_BYTES_REL(b, b_ptr, b_bitoffs, b_bitsize, b_base); if ((a_bitsize | b_bitsize | a_bitoffs | b_bitoffs) == 0) { min_size = (a_size < b_size) ? a_size : b_size; if ((cmp = sys_memcmp(a_ptr, b_ptr, min_size)) != 0) { RETURN_NEQ(cmp); } } else { a_size = (a_size << 3) + a_bitsize; b_size = (b_size << 3) + b_bitsize; min_size = (a_size < b_size) ? a_size : b_size; if ((cmp = erts_cmp_bits(a_ptr,a_bitoffs, b_ptr,b_bitoffs,min_size)) != 0) { RETURN_NEQ(cmp); } } ON_CMP_GOTO((Sint)(a_size - b_size)); } } } } /* * Take care of the case that the tags are different. */ mixed_types: { FloatDef f1, f2; Eterm big; #if HEAP_ON_C_STACK Eterm big_buf[2]; /* If HEAP_ON_C_STACK */ #else Eterm *big_buf = erts_get_scheduler_data()->cmp_tmp_heap; #endif #if HALFWORD_HEAP Wterm aw = is_immed(a) ? a : rterm2wterm(a,a_base); Wterm bw = is_immed(b) ? b : rterm2wterm(b,b_base); #else Eterm aw = a; Eterm bw = b; #endif b_tag = tag_val_def(bw); switch(_NUMBER_CODE(a_tag, b_tag)) { case SMALL_BIG: big = small_to_big(signed_val(a), big_buf); j = big_comp(big, bw); break; case SMALL_FLOAT: f1.fd = signed_val(a); GET_DOUBLE(bw, f2); j = float_comp(f1.fd, f2.fd); break; case BIG_SMALL: big = small_to_big(signed_val(b), big_buf); j = big_comp(aw, big); break; case BIG_FLOAT: if (big_to_double(aw, &f1.fd) < 0) { j = big_sign(a) ? -1 : 1; } else { GET_DOUBLE(bw, f2); j = float_comp(f1.fd, f2.fd); } break; case FLOAT_SMALL: GET_DOUBLE(aw, f1); f2.fd = signed_val(b); j = float_comp(f1.fd, f2.fd); break; case FLOAT_BIG: if (big_to_double(bw, &f2.fd) < 0) { j = big_sign(b) ? 1 : -1; } else { GET_DOUBLE(aw, f1); j = float_comp(f1.fd, f2.fd); } break; default: j = b_tag - a_tag; } } if (j == 0) { goto pop_next; } else { goto not_equal; } term_array: /* arrays in 'aa' and 'bb', length in 'i' */ ASSERT(i>0); while (--i) { a = *aa++; b = *bb++; if (!is_same(a,a_base, b,b_base)) { if (is_atom(a) && is_atom(b)) { if ((j = cmp_atoms(a, b)) != 0) { goto not_equal; } } else if (is_both_small(a, b)) { if ((j = signed_val(a)-signed_val(b)) != 0) { goto not_equal; } } else { /* (ab)Use TAG_PRIMARY_HEADER to recognize a term_array */ WSTACK_PUSH3(stack, i, (UWord)bb, (UWord)aa | TAG_PRIMARY_HEADER); goto tailrecur_ne; } } } a = *aa; b = *bb; goto tailrecur; pop_next: if (!WSTACK_ISEMPTY(stack)) { UWord something = WSTACK_POP(stack); if (primary_tag((Eterm) something) == TAG_PRIMARY_HEADER) { /* a term_array */ aa = (Eterm*) something; bb = (Eterm*) WSTACK_POP(stack); i = WSTACK_POP(stack); goto term_array; } a = (Eterm) something; b = (Eterm) WSTACK_POP(stack); goto tailrecur; } DESTROY_WSTACK(stack); return 0; not_equal: DESTROY_ESTACK(stack); return j; #undef CMP_NODES } Eterm store_external_or_ref_(Uint **hpp, ErlOffHeap* oh, Eterm ns) { Uint i; Uint size; Uint *from_hp; Uint *to_hp = *hpp; ASSERT(is_external(ns) || is_internal_ref(ns)); if(is_external(ns)) { from_hp = external_val(ns); size = thing_arityval(*from_hp) + 1; *hpp += size; for(i = 0; i < size; i++) to_hp[i] = from_hp[i]; erts_refc_inc(&((ExternalThing *) to_hp)->node->refc, 2); ((struct erl_off_heap_header*) to_hp)->next = oh->first; oh->first = (struct erl_off_heap_header*) to_hp; return make_external(to_hp); } /* Internal ref */ from_hp = internal_ref_val(ns); size = thing_arityval(*from_hp) + 1; *hpp += size; for(i = 0; i < size; i++) to_hp[i] = from_hp[i]; return make_internal_ref(to_hp); } Eterm store_external_or_ref_in_proc_(Process *proc, Eterm ns) { Uint sz; Uint *hp; ASSERT(is_external(ns) || is_internal_ref(ns)); sz = NC_HEAP_SIZE(ns); ASSERT(sz > 0); hp = HAlloc(proc, sz); return store_external_or_ref_(&hp, &MSO(proc), ns); } void bin_write(int to, void *to_arg, byte* buf, int sz) { int i; for (i=0;is[sizeof(buf->s)-1]; int sign = 0; *p-- = '\0'; /* null terminate */ if (n == 0) *p-- = '0'; else if (n < 0) { sign = 1; n = -n; } while (n != 0) { *p-- = (n % 10) + '0'; n /= 10; } if (sign) *p-- = '-'; return p+1; } /* Build a list of integers in some safe memory area ** Memory must be pre allocated prio call 2*len in size ** hp is a pointer to the "heap" pointer on return ** this pointer is updated to point after the list */ Eterm buf_to_intlist(Eterm** hpp, char *buf, int len, Eterm tail) { Eterm* hp = *hpp; buf += (len-1); while(len > 0) { tail = CONS(hp, make_small((byte)*buf), tail); hp += 2; buf--; len--; } *hpp = hp; return tail; } /* ** Write io list in to a buffer. ** ** An iolist is defined as: ** ** iohead ::= Binary ** | Byte (i.e integer in range [0..255] ** | iolist ** ; ** ** iotail ::= [] ** | Binary (added by tony) ** | iolist ** ; ** ** iolist ::= [] ** | Binary ** | [ iohead | iotail] ** ; ** ** Return remaining bytes in buffer on success ** -1 on overflow ** -2 on type error (including that result would not be a whole number of bytes) */ int io_list_to_buf(Eterm obj, char* buf, int len) { Eterm* objp; DECLARE_ESTACK(s); goto L_again; while (!ESTACK_ISEMPTY(s)) { obj = ESTACK_POP(s); L_again: if (is_list(obj)) { L_iter_list: objp = list_val(obj); obj = CAR(objp); if (is_byte(obj)) { if (len == 0) { goto L_overflow; } *buf++ = unsigned_val(obj); len--; } else if (is_binary(obj)) { byte* bptr; size_t size = binary_size(obj); Uint bitsize; Uint bitoffs; Uint num_bits; if (len < size) { goto L_overflow; } ERTS_GET_BINARY_BYTES(obj, bptr, bitoffs, bitsize); if (bitsize != 0) { goto L_type_error; } num_bits = 8*size; copy_binary_to_buffer(buf, 0, bptr, bitoffs, num_bits); buf += size; len -= size; } else if (is_list(obj)) { ESTACK_PUSH(s, CDR(objp)); goto L_iter_list; /* on head */ } else if (is_not_nil(obj)) { goto L_type_error; } obj = CDR(objp); if (is_list(obj)) { goto L_iter_list; /* on tail */ } else if (is_binary(obj)) { byte* bptr; size_t size = binary_size(obj); Uint bitsize; Uint bitoffs; Uint num_bits; if (len < size) { goto L_overflow; } ERTS_GET_BINARY_BYTES(obj, bptr, bitoffs, bitsize); if (bitsize != 0) { goto L_type_error; } num_bits = 8*size; copy_binary_to_buffer(buf, 0, bptr, bitoffs, num_bits); buf += size; len -= size; } else if (is_not_nil(obj)) { goto L_type_error; } } else if (is_binary(obj)) { byte* bptr; size_t size = binary_size(obj); Uint bitsize; Uint bitoffs; Uint num_bits; if (len < size) { goto L_overflow; } ERTS_GET_BINARY_BYTES(obj, bptr, bitoffs, bitsize); if (bitsize != 0) { goto L_type_error; } num_bits = 8*size; copy_binary_to_buffer(buf, 0, bptr, bitoffs, num_bits); buf += size; len -= size; } else if (is_not_nil(obj)) { goto L_type_error; } } DESTROY_ESTACK(s); return len; L_type_error: DESTROY_ESTACK(s); return -2; L_overflow: DESTROY_ESTACK(s); return -1; } /* * Return 0 if successful, and non-zero if unsuccessful. */ int erts_iolist_size(Eterm obj, Uint* sizep) { Eterm* objp; Uint size = 0; DECLARE_ESTACK(s); goto L_again; #define SAFE_ADD(Var, Val) \ do { \ Uint valvar = (Val); \ Var += valvar; \ if (Var < valvar) { \ goto L_overflow_error; \ } \ } while (0) while (!ESTACK_ISEMPTY(s)) { obj = ESTACK_POP(s); L_again: if (is_list(obj)) { L_iter_list: objp = list_val(obj); /* Head */ obj = CAR(objp); if (is_byte(obj)) { size++; if (size == 0) { goto L_overflow_error; } } else if (is_binary(obj) && binary_bitsize(obj) == 0) { SAFE_ADD(size, binary_size(obj)); } else if (is_list(obj)) { ESTACK_PUSH(s, CDR(objp)); goto L_iter_list; /* on head */ } else if (is_not_nil(obj)) { goto L_type_error; } /* Tail */ obj = CDR(objp); if (is_list(obj)) goto L_iter_list; /* on tail */ else if (is_binary(obj) && binary_bitsize(obj) == 0) { SAFE_ADD(size, binary_size(obj)); } else if (is_not_nil(obj)) { goto L_type_error; } } else if (is_binary(obj) && binary_bitsize(obj) == 0) { /* Tail was binary */ SAFE_ADD(size, binary_size(obj)); } else if (is_not_nil(obj)) { goto L_type_error; } } #undef SAFE_ADD DESTROY_ESTACK(s); *sizep = size; return ERTS_IOLIST_OK; L_overflow_error: DESTROY_ESTACK(s); return ERTS_IOLIST_OVERFLOW; L_type_error: DESTROY_ESTACK(s); return ERTS_IOLIST_TYPE; } /* return 0 if item is not a non-empty flat list of bytes */ int is_string(Eterm list) { int len = 0; while(is_list(list)) { Eterm* consp = list_val(list); Eterm hd = CAR(consp); if (!is_byte(hd)) return 0; len++; list = CDR(consp); } if (is_nil(list)) return len; return 0; } #ifdef ERTS_SMP /* * Process and Port timers in smp case */ ERTS_SCHED_PREF_PRE_ALLOC_IMPL(ptimer_pre, ErtsSmpPTimer, 1000) #define ERTS_PTMR_FLGS_ALLCD_SIZE \ 2 #define ERTS_PTMR_FLGS_ALLCD_MASK \ ((((Uint32) 1) << ERTS_PTMR_FLGS_ALLCD_SIZE) - 1) #define ERTS_PTMR_FLGS_PREALLCD ((Uint32) 1) #define ERTS_PTMR_FLGS_SLALLCD ((Uint32) 2) #define ERTS_PTMR_FLGS_LLALLCD ((Uint32) 3) #define ERTS_PTMR_FLG_CANCELLED (((Uint32) 1) << (ERTS_PTMR_FLGS_ALLCD_SIZE+0)) static void init_ptimers(void) { init_ptimer_pre_alloc(); } static ERTS_INLINE void free_ptimer(ErtsSmpPTimer *ptimer) { switch (ptimer->timer.flags & ERTS_PTMR_FLGS_ALLCD_MASK) { case ERTS_PTMR_FLGS_PREALLCD: (void) ptimer_pre_free(ptimer); break; case ERTS_PTMR_FLGS_SLALLCD: erts_free(ERTS_ALC_T_SL_PTIMER, (void *) ptimer); break; case ERTS_PTMR_FLGS_LLALLCD: erts_free(ERTS_ALC_T_LL_PTIMER, (void *) ptimer); break; default: erl_exit(ERTS_ABORT_EXIT, "Internal error: Bad ptimer alloc type\n"); break; } } /* Callback for process timeout cancelled */ static void ptimer_cancelled(ErtsSmpPTimer *ptimer) { free_ptimer(ptimer); } /* Callback for process timeout */ static void ptimer_timeout(ErtsSmpPTimer *ptimer) { if (is_internal_pid(ptimer->timer.id)) { Process *p; p = erts_pid2proc_opt(NULL, 0, ptimer->timer.id, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS, ERTS_P2P_FLG_ALLOW_OTHER_X); if (p) { if (!p->is_exiting && !(ptimer->timer.flags & ERTS_PTMR_FLG_CANCELLED)) { ASSERT(*ptimer->timer.timer_ref == ptimer); *ptimer->timer.timer_ref = NULL; (*ptimer->timer.timeout_func)(p); } erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); } } else { Port *p; ASSERT(is_internal_port(ptimer->timer.id)); p = erts_id2port_sflgs(ptimer->timer.id, NULL, 0, ERTS_PORT_SFLGS_DEAD); if (p) { if (!(ptimer->timer.flags & ERTS_PTMR_FLG_CANCELLED)) { ASSERT(*ptimer->timer.timer_ref == ptimer); *ptimer->timer.timer_ref = NULL; (*ptimer->timer.timeout_func)(p); } erts_port_release(p); } } free_ptimer(ptimer); } void erts_create_smp_ptimer(ErtsSmpPTimer **timer_ref, Eterm id, ErlTimeoutProc timeout_func, Uint timeout) { ErtsSmpPTimer *res = ptimer_pre_alloc(); if (res) res->timer.flags = ERTS_PTMR_FLGS_PREALLCD; else { if (timeout < ERTS_ALC_MIN_LONG_LIVED_TIME) { res = erts_alloc(ERTS_ALC_T_SL_PTIMER, sizeof(ErtsSmpPTimer)); res->timer.flags = ERTS_PTMR_FLGS_SLALLCD; } else { res = erts_alloc(ERTS_ALC_T_LL_PTIMER, sizeof(ErtsSmpPTimer)); res->timer.flags = ERTS_PTMR_FLGS_LLALLCD; } } res->timer.timeout_func = timeout_func; res->timer.timer_ref = timer_ref; res->timer.id = id; res->timer.tm.active = 0; /* MUST be initalized */ ASSERT(!*timer_ref); *timer_ref = res; erts_set_timer(&res->timer.tm, (ErlTimeoutProc) ptimer_timeout, (ErlCancelProc) ptimer_cancelled, (void*) res, timeout); } void erts_cancel_smp_ptimer(ErtsSmpPTimer *ptimer) { if (ptimer) { ASSERT(*ptimer->timer.timer_ref == ptimer); *ptimer->timer.timer_ref = NULL; ptimer->timer.flags |= ERTS_PTMR_FLG_CANCELLED; erts_cancel_timer(&ptimer->timer.tm); } } #endif static Sint trim_threshold; static Sint top_pad; static Sint mmap_threshold; static Sint mmap_max; Uint tot_bin_allocated; void erts_init_utils(void) { #ifdef ERTS_SMP init_ptimers(); #endif } void erts_init_utils_mem(void) { trim_threshold = -1; top_pad = -1; mmap_threshold = -1; mmap_max = -1; } int sys_alloc_opt(int opt, int value) { #if HAVE_MALLOPT Sint m_opt; Sint *curr_val; switch(opt) { case SYS_ALLOC_OPT_TRIM_THRESHOLD: #ifdef M_TRIM_THRESHOLD m_opt = M_TRIM_THRESHOLD; curr_val = &trim_threshold; break; #else return 0; #endif case SYS_ALLOC_OPT_TOP_PAD: #ifdef M_TOP_PAD m_opt = M_TOP_PAD; curr_val = &top_pad; break; #else return 0; #endif case SYS_ALLOC_OPT_MMAP_THRESHOLD: #ifdef M_MMAP_THRESHOLD m_opt = M_MMAP_THRESHOLD; curr_val = &mmap_threshold; break; #else return 0; #endif case SYS_ALLOC_OPT_MMAP_MAX: #ifdef M_MMAP_MAX m_opt = M_MMAP_MAX; curr_val = &mmap_max; break; #else return 0; #endif default: return 0; } if(mallopt(m_opt, value)) { *curr_val = (Sint) value; return 1; } #endif /* #if HAVE_MALLOPT */ return 0; } void sys_alloc_stat(SysAllocStat *sasp) { sasp->trim_threshold = trim_threshold; sasp->top_pad = top_pad; sasp->mmap_threshold = mmap_threshold; sasp->mmap_max = mmap_max; } #ifdef ERTS_SMP /* Local system block state */ struct { int emergency; long emergency_timeout; erts_smp_cnd_t watchdog_cnd; erts_smp_tid_t watchdog_tid; int threads_to_block; int have_blocker; erts_smp_tid_t blocker_tid; int recursive_block; Uint32 allowed_activities; erts_smp_tsd_key_t blockable_key; erts_smp_mtx_t mtx; erts_smp_cnd_t cnd; #ifdef ERTS_ENABLE_LOCK_CHECK int activity_changing; int checking; #endif } system_block_state; /* Global system block state */ erts_system_block_state_t erts_system_block_state; static ERTS_INLINE int is_blockable_thread(void) { return erts_smp_tsd_get(system_block_state.blockable_key) != NULL; } static ERTS_INLINE int is_blocker(void) { return (system_block_state.have_blocker && erts_smp_equal_tids(system_block_state.blocker_tid, erts_smp_thr_self())); } #ifdef ERTS_ENABLE_LOCK_CHECK int erts_lc_is_blocking(void) { int res; erts_smp_mtx_lock(&system_block_state.mtx); res = erts_smp_pending_system_block() && is_blocker(); erts_smp_mtx_unlock(&system_block_state.mtx); return res; } #endif static ERTS_INLINE void block_me(void (*prepare)(void *), void (*resume)(void *), void *arg, int mtx_locked, int want_to_block, int update_act_changing, profile_sched_msg_q *psmq) { if (prepare) (*prepare)(arg); /* Locks might be held... */ if (!mtx_locked) erts_smp_mtx_lock(&system_block_state.mtx); if (erts_smp_pending_system_block() && !is_blocker()) { int is_blockable = is_blockable_thread(); ASSERT(is_blockable); if (is_blockable) system_block_state.threads_to_block--; if (erts_system_profile_flags.scheduler && psmq) { ErtsSchedulerData *esdp = erts_get_scheduler_data(); if (esdp) { profile_sched_msg *msg = NULL; ASSERT(psmq->n < 2); msg = &((psmq->msg)[psmq->n]); msg->scheduler_id = esdp->no; get_now(&(msg->Ms), &(msg->s), &(msg->us)); msg->no_schedulers = 0; msg->state = am_inactive; psmq->n++; } } #ifdef ERTS_ENABLE_LOCK_CHECK if (update_act_changing) system_block_state.activity_changing--; #endif erts_smp_cnd_broadcast(&system_block_state.cnd); do { erts_smp_cnd_wait(&system_block_state.cnd, &system_block_state.mtx); } while (erts_smp_pending_system_block() && !(want_to_block && !system_block_state.have_blocker)); #ifdef ERTS_ENABLE_LOCK_CHECK if (update_act_changing) system_block_state.activity_changing++; #endif if (erts_system_profile_flags.scheduler && psmq) { ErtsSchedulerData *esdp = erts_get_scheduler_data(); if (esdp) { profile_sched_msg *msg = NULL; ASSERT(psmq->n < 2); msg = &((psmq->msg)[psmq->n]); msg->scheduler_id = esdp->no; get_now(&(msg->Ms), &(msg->s), &(msg->us)); msg->no_schedulers = 0; msg->state = am_active; psmq->n++; } } if (is_blockable) system_block_state.threads_to_block++; } if (!mtx_locked) erts_smp_mtx_unlock(&system_block_state.mtx); if (resume) (*resume)(arg); } void erts_block_me(void (*prepare)(void *), void (*resume)(void *), void *arg) { profile_sched_msg_q psmq; psmq.n = 0; if (prepare) (*prepare)(arg); #ifdef ERTS_ENABLE_LOCK_CHECK erts_lc_check_exact(NULL, 0); /* No locks should be locked */ #endif block_me(NULL, NULL, NULL, 0, 0, 0, &psmq); if (erts_system_profile_flags.scheduler && psmq.n > 0) dispatch_profile_msg_q(&psmq); if (resume) (*resume)(arg); } void erts_register_blockable_thread(void) { profile_sched_msg_q psmq; psmq.n = 0; if (!is_blockable_thread()) { erts_smp_mtx_lock(&system_block_state.mtx); system_block_state.threads_to_block++; erts_smp_tsd_set(system_block_state.blockable_key, (void *) &erts_system_block_state); /* Someone might be waiting for us to block... */ if (erts_smp_pending_system_block()) block_me(NULL, NULL, NULL, 1, 0, 0, &psmq); erts_smp_mtx_unlock(&system_block_state.mtx); if (erts_system_profile_flags.scheduler && psmq.n > 0) dispatch_profile_msg_q(&psmq); } } void erts_unregister_blockable_thread(void) { if (is_blockable_thread()) { erts_smp_mtx_lock(&system_block_state.mtx); system_block_state.threads_to_block--; ASSERT(system_block_state.threads_to_block >= 0); erts_smp_tsd_set(system_block_state.blockable_key, NULL); /* Someone might be waiting for us to block... */ if (erts_smp_pending_system_block()) erts_smp_cnd_broadcast(&system_block_state.cnd); erts_smp_mtx_unlock(&system_block_state.mtx); } } void erts_note_activity_begin(erts_activity_t activity) { erts_smp_mtx_lock(&system_block_state.mtx); if (erts_smp_pending_system_block()) { Uint32 broadcast = 0; switch (activity) { case ERTS_ACTIVITY_GC: broadcast = (system_block_state.allowed_activities & ERTS_BS_FLG_ALLOW_GC); break; case ERTS_ACTIVITY_IO: broadcast = (system_block_state.allowed_activities & ERTS_BS_FLG_ALLOW_IO); break; case ERTS_ACTIVITY_WAIT: broadcast = 1; break; default: abort(); break; } if (broadcast) erts_smp_cnd_broadcast(&system_block_state.cnd); } erts_smp_mtx_unlock(&system_block_state.mtx); } void erts_check_block(erts_activity_t old_activity, erts_activity_t new_activity, int locked, void (*prepare)(void *), void (*resume)(void *), void *arg) { int do_block; profile_sched_msg_q psmq; psmq.n = 0; if (!locked && prepare) (*prepare)(arg); erts_smp_mtx_lock(&system_block_state.mtx); /* First check if it is ok to block... */ if (!locked) do_block = 1; else { switch (old_activity) { case ERTS_ACTIVITY_UNDEFINED: do_block = 0; break; case ERTS_ACTIVITY_GC: do_block = (system_block_state.allowed_activities & ERTS_BS_FLG_ALLOW_GC); break; case ERTS_ACTIVITY_IO: do_block = (system_block_state.allowed_activities & ERTS_BS_FLG_ALLOW_IO); break; case ERTS_ACTIVITY_WAIT: /* You are not allowed to leave activity waiting * without supplying the possibility to block * unlocked. */ erts_set_activity_error(ERTS_ACT_ERR_LEAVE_WAIT_UNLOCKED, __FILE__, __LINE__); do_block = 0; break; default: erts_set_activity_error(ERTS_ACT_ERR_LEAVE_UNKNOWN_ACTIVITY, __FILE__, __LINE__); do_block = 0; break; } } if (do_block) { /* ... then check if it is necessary to block... */ switch (new_activity) { case ERTS_ACTIVITY_UNDEFINED: do_block = 1; break; case ERTS_ACTIVITY_GC: do_block = !(system_block_state.allowed_activities & ERTS_BS_FLG_ALLOW_GC); break; case ERTS_ACTIVITY_IO: do_block = !(system_block_state.allowed_activities & ERTS_BS_FLG_ALLOW_IO); break; case ERTS_ACTIVITY_WAIT: /* No need to block if we are going to wait */ do_block = 0; break; default: erts_set_activity_error(ERTS_ACT_ERR_ENTER_UNKNOWN_ACTIVITY, __FILE__, __LINE__); break; } } if (do_block) { #ifdef ERTS_ENABLE_LOCK_CHECK if (!locked) { /* Only system_block_state.mtx should be held */ erts_lc_check_exact(&system_block_state.mtx.lc, 1); } #endif block_me(NULL, NULL, NULL, 1, 0, 1, &psmq); } erts_smp_mtx_unlock(&system_block_state.mtx); if (erts_system_profile_flags.scheduler && psmq.n > 0) dispatch_profile_msg_q(&psmq); if (!locked && resume) (*resume)(arg); } void erts_set_activity_error(erts_activity_error_t error, char *file, int line) { switch (error) { case ERTS_ACT_ERR_LEAVE_WAIT_UNLOCKED: erl_exit(1, "%s:%d: Fatal error: Leaving activity waiting without " "supplying the possibility to block unlocked.", file, line); break; case ERTS_ACT_ERR_LEAVE_UNKNOWN_ACTIVITY: erl_exit(1, "%s:%d: Fatal error: Leaving unknown activity.", file, line); break; case ERTS_ACT_ERR_ENTER_UNKNOWN_ACTIVITY: erl_exit(1, "%s:%d: Fatal error: Leaving unknown activity.", file, line); break; default: erl_exit(1, "%s:%d: Internal error in erts_smp_set_activity()", file, line); break; } } static ERTS_INLINE erts_aint32_t threads_not_under_control(void) { erts_aint32_t res = system_block_state.threads_to_block; /* Waiting is always an allowed activity... */ res -= erts_smp_atomic32_read(&erts_system_block_state.in_activity.wait); if (system_block_state.allowed_activities & ERTS_BS_FLG_ALLOW_GC) res -= erts_smp_atomic32_read(&erts_system_block_state.in_activity.gc); if (system_block_state.allowed_activities & ERTS_BS_FLG_ALLOW_IO) res -= erts_smp_atomic32_read(&erts_system_block_state.in_activity.io); if (res < 0) { ASSERT(0); return 0; } return res; } /* * erts_block_system() blocks all threads registered as blockable. * It doesn't return until either all threads have blocked (0 is returned) * or it has timed out (ETIMEDOUT) is returned. * * If allowed activities == 0, blocked threads will release all locks * before blocking. * * If allowed_activities is != 0, erts_block_system() will allow blockable * threads to continue executing as long as they are doing an allowed * activity. When they are done with the allowed activity they will block, * *but* they will block holding locks. Therefore, the thread calling * erts_block_system() must *not* try to aquire any locks that might be * held by blocked threads holding locks from allowed activities. * * Currently allowed_activities are: * * ERTS_BS_FLG_ALLOW_GC Thread continues with garbage * collection and blocks with * main process lock on current * process locked. * * ERTS_BS_FLG_ALLOW_IO Thread continues with I/O */ void erts_block_system(Uint32 allowed_activities) { int do_block; profile_sched_msg_q psmq; psmq.n = 0; #ifdef ERTS_ENABLE_LOCK_CHECK erts_lc_check_exact(NULL, 0); /* No locks should be locked */ #endif erts_smp_mtx_lock(&system_block_state.mtx); do_block = erts_smp_pending_system_block(); if (do_block && system_block_state.have_blocker && erts_smp_equal_tids(system_block_state.blocker_tid, erts_smp_thr_self())) { ASSERT(system_block_state.recursive_block >= 0); system_block_state.recursive_block++; /* You are not allowed to restrict allowed activites in a recursive block! */ ERTS_SMP_LC_ASSERT((system_block_state.allowed_activities & ~allowed_activities) == 0); } else { erts_smp_atomic32_inc(&erts_system_block_state.do_block); /* Someone else might be waiting for us to block... */ if (do_block) { do_block_me: block_me(NULL, NULL, NULL, 1, 1, 0, &psmq); } ASSERT(!system_block_state.have_blocker); system_block_state.have_blocker = 1; system_block_state.blocker_tid = erts_smp_thr_self(); system_block_state.allowed_activities = allowed_activities; if (is_blockable_thread()) system_block_state.threads_to_block--; while (threads_not_under_control() && !system_block_state.emergency) erts_smp_cnd_wait(&system_block_state.cnd, &system_block_state.mtx); if (system_block_state.emergency) { system_block_state.have_blocker = 0; goto do_block_me; } } erts_smp_mtx_unlock(&system_block_state.mtx); if (erts_system_profile_flags.scheduler && psmq.n > 0 ) dispatch_profile_msg_q(&psmq); } /* * erts_emergency_block_system() should only be called when we are * about to write a crash dump... */ int erts_emergency_block_system(long timeout, Uint32 allowed_activities) { int res = 0; long another_blocker; erts_smp_mtx_lock(&system_block_state.mtx); if (system_block_state.emergency) { /* Argh... */ res = EINVAL; goto done; } another_blocker = erts_smp_pending_system_block(); system_block_state.emergency = 1; erts_smp_atomic32_inc(&erts_system_block_state.do_block); if (another_blocker) { if (is_blocker()) { erts_smp_atomic32_dec(&erts_system_block_state.do_block); res = 0; goto done; } /* kick the other blocker */ erts_smp_cnd_broadcast(&system_block_state.cnd); while (system_block_state.have_blocker) erts_smp_cnd_wait(&system_block_state.cnd, &system_block_state.mtx); } ASSERT(!system_block_state.have_blocker); system_block_state.have_blocker = 1; system_block_state.blocker_tid = erts_smp_thr_self(); system_block_state.allowed_activities = allowed_activities; if (is_blockable_thread()) system_block_state.threads_to_block--; if (timeout < 0) { while (threads_not_under_control()) erts_smp_cnd_wait(&system_block_state.cnd, &system_block_state.mtx); } else { system_block_state.emergency_timeout = timeout; erts_smp_cnd_signal(&system_block_state.watchdog_cnd); while (system_block_state.emergency_timeout >= 0 && threads_not_under_control()) { erts_smp_cnd_wait(&system_block_state.cnd, &system_block_state.mtx); } } done: erts_smp_mtx_unlock(&system_block_state.mtx); return res; } void erts_release_system(void) { long do_block; profile_sched_msg_q psmq; psmq.n = 0; #ifdef ERTS_ENABLE_LOCK_CHECK erts_lc_check_exact(NULL, 0); /* No locks should be locked */ #endif erts_smp_mtx_lock(&system_block_state.mtx); ASSERT(is_blocker()); ASSERT(system_block_state.recursive_block >= 0); if (system_block_state.recursive_block) system_block_state.recursive_block--; else { do_block = erts_smp_atomic32_dectest(&erts_system_block_state.do_block); system_block_state.have_blocker = 0; if (is_blockable_thread()) system_block_state.threads_to_block++; else do_block = 0; /* Someone else might be waiting for us to block... */ if (do_block) block_me(NULL, NULL, NULL, 1, 0, 0, &psmq); else erts_smp_cnd_broadcast(&system_block_state.cnd); } erts_smp_mtx_unlock(&system_block_state.mtx); if (erts_system_profile_flags.scheduler && psmq.n > 0) dispatch_profile_msg_q(&psmq); } #ifdef ERTS_ENABLE_LOCK_CHECK void erts_lc_activity_change_begin(void) { erts_smp_mtx_lock(&system_block_state.mtx); system_block_state.activity_changing++; erts_smp_mtx_unlock(&system_block_state.mtx); } void erts_lc_activity_change_end(void) { erts_smp_mtx_lock(&system_block_state.mtx); system_block_state.activity_changing--; if (system_block_state.checking && !system_block_state.activity_changing) erts_smp_cnd_broadcast(&system_block_state.cnd); erts_smp_mtx_unlock(&system_block_state.mtx); } #endif int erts_is_system_blocked(erts_activity_t allowed_activities) { int blkd; erts_smp_mtx_lock(&system_block_state.mtx); blkd = (erts_smp_pending_system_block() && system_block_state.have_blocker && erts_smp_equal_tids(system_block_state.blocker_tid, erts_smp_thr_self()) && !(system_block_state.allowed_activities & ~allowed_activities)); #ifdef ERTS_ENABLE_LOCK_CHECK if (blkd) { system_block_state.checking = 1; while (system_block_state.activity_changing) erts_smp_cnd_wait(&system_block_state.cnd, &system_block_state.mtx); system_block_state.checking = 0; blkd = !threads_not_under_control(); } #endif erts_smp_mtx_unlock(&system_block_state.mtx); return blkd; } static void * emergency_watchdog(void *unused) { erts_smp_mtx_lock(&system_block_state.mtx); while (1) { long timeout; while (system_block_state.emergency_timeout < 0) erts_smp_cnd_wait(&system_block_state.watchdog_cnd, &system_block_state.mtx); timeout = system_block_state.emergency_timeout; erts_smp_mtx_unlock(&system_block_state.mtx); if (erts_disable_tolerant_timeofday) erts_milli_sleep(timeout); else { SysTimeval to; erts_get_timeval(&to); to.tv_sec += timeout / 1000; to.tv_usec += timeout % 1000; while (1) { SysTimeval curr; erts_milli_sleep(timeout); erts_get_timeval(&curr); if (curr.tv_sec > to.tv_sec || (curr.tv_sec == to.tv_sec && curr.tv_usec >= to.tv_usec)) { break; } timeout = (to.tv_sec - curr.tv_sec)*1000; timeout += (to.tv_usec - curr.tv_usec)/1000; } } erts_smp_mtx_lock(&system_block_state.mtx); system_block_state.emergency_timeout = -1; erts_smp_cnd_broadcast(&system_block_state.cnd); } erts_smp_mtx_unlock(&system_block_state.mtx); return NULL; } void erts_system_block_init(void) { erts_smp_thr_opts_t thr_opts = ERTS_SMP_THR_OPTS_DEFAULT_INITER; /* Local state... */ system_block_state.emergency = 0; system_block_state.emergency_timeout = -1; erts_smp_cnd_init(&system_block_state.watchdog_cnd); system_block_state.threads_to_block = 0; system_block_state.have_blocker = 0; /* system_block_state.block_tid */ system_block_state.recursive_block = 0; system_block_state.allowed_activities = 0; erts_smp_tsd_key_create(&system_block_state.blockable_key); erts_smp_mtx_init(&system_block_state.mtx, "system_block"); erts_smp_cnd_init(&system_block_state.cnd); #ifdef ERTS_ENABLE_LOCK_CHECK system_block_state.activity_changing = 0; system_block_state.checking = 0; #endif thr_opts.suggested_stack_size = 8; erts_smp_thr_create(&system_block_state.watchdog_tid, emergency_watchdog, NULL, &thr_opts); /* Global state... */ erts_smp_atomic32_init(&erts_system_block_state.do_block, 0); erts_smp_atomic32_init(&erts_system_block_state.in_activity.wait, 0); erts_smp_atomic32_init(&erts_system_block_state.in_activity.gc, 0); erts_smp_atomic32_init(&erts_system_block_state.in_activity.io, 0); /* Make sure blockable threads unregister when exiting... */ erts_smp_install_exit_handler(erts_unregister_blockable_thread); } #endif /* #ifdef ERTS_SMP */ char * erts_read_env(char *key) { size_t value_len = 256; char *value = erts_alloc(ERTS_ALC_T_TMP, value_len); int res; while (1) { res = erts_sys_getenv(key, value, &value_len); if (res <= 0) break; value = erts_realloc(ERTS_ALC_T_TMP, value, value_len); } if (res != 0) { erts_free(ERTS_ALC_T_TMP, value); return NULL; } return value; } void erts_free_read_env(void *value) { if (value) erts_free(ERTS_ALC_T_TMP, value); } int erts_write_env(char *key, char *value) { int ix, res; size_t key_len = sys_strlen(key), value_len = sys_strlen(value); char *key_value = erts_alloc_fnf(ERTS_ALC_T_TMP, key_len + 1 + value_len + 1); if (!key_value) { errno = ENOMEM; return -1; } sys_memcpy((void *) key_value, (void *) key, key_len); ix = key_len; key_value[ix++] = '='; sys_memcpy((void *) key_value, (void *) value, value_len); ix += value_len; key_value[ix] = '\0'; res = erts_sys_putenv(key_value, key_len); erts_free(ERTS_ALC_T_TMP, key_value); return res; } /* * To be used to silence unused result warnings, but do not abuse it. */ void erts_silence_warn_unused_result(long unused) { } #ifdef DEBUG /* * Handy functions when using a debugger - don't use in the code! */ void upp(buf,sz) byte* buf; int sz; { bin_write(ERTS_PRINT_STDERR,NULL,buf,sz); } void pat(Eterm atom) { upp(atom_tab(atom_val(atom))->name, atom_tab(atom_val(atom))->len); } void pinfo() { process_info(ERTS_PRINT_STDOUT, NULL); } void pp(p) Process *p; { if(p) print_process_info(ERTS_PRINT_STDERR, NULL, p); } void ppi(Eterm pid) { pp(erts_pid2proc_unlocked(pid)); } void td(Eterm x) { erts_fprintf(stderr, "%T\n", x); } void ps(Process* p, Eterm* stop) { Eterm* sp = STACK_START(p) - 1; if (stop <= STACK_END(p)) { stop = STACK_END(p) + 1; } while(sp >= stop) { erts_printf("%p: %.75T\n", sp, *sp); sp--; } } #endif