/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1998-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*
*/
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#include "eidef.h"
#ifndef __WIN32__
# ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
# else
# ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
# endif
#endif
#include "eiext.h"
#include "putget.h"
#include "ei_printterm.h"
#include "ei_internal.h"
#include "show_msg.h"
#ifndef EISHOWBUF
#define EISHOWBUF 512
#endif
static void show_term(const char *termbuf, int *index, FILE *stream);
static void show_pid(FILE *stream, const erlang_pid *pid);
static void show_trace(FILE *stream, const erlang_trace *t);
static void show_msg(FILE *stream, int direction, const erlang_msg *msg,
const char *buf);
static void ei_efprint(FILE *stream, const char *termbuf);
static int ei_decode_skip_bignum(const char *buf, int *index, void *p);
static int printable_list_p(const uint8 *buf, int buflen);
/***************************************************************************
*
* Write trace information to stderr
*
***************************************************************************/
void ei_trace_printf(const char *name, int level, const char *format,...)
{
time_t now;
char *timestr;
char buf[2048];
int len;
va_list args;
va_start(args, format);
time(&now);
timestr = (char *)ctime(&now);
sprintf(buf, "%s: %.*s: ", name, (int) strlen(timestr)-1, timestr);
len = strlen(buf);
vsprintf(buf + len, format, args);
fprintf(stderr,"%s\r\n",buf);
va_end(args);
}
/***************************************************************************
*
* Debug printing of incoming and outgoing messages
*
***************************************************************************/
/*
* FIXME maybe this function should be rewritten to use ei_printterm instead
* (or the other way around)
*/
/*
* the new TT stuff has been added, but when these messages are shown
* they will look just like the non-tt ones for now.
*/
/*
* this should be long enough for longest atoms (256) but short enough for
* fprintf to handle all at once (a few kb probably).
*/
void ei_show_recmsg(FILE *stream, erlang_msg *msg, char *buf)
{
show_msg(stream, 0, msg, buf);
}
/* decode the buffer again before showing it */
int ei_show_sendmsg(FILE *stream, const char *header, const char *msgbuf)
{
erlang_msg msg;
const char *mbuf = NULL;
int index = 0;
int arity = 0;
int version = 0;
/* skip five bytes */
index = 5;
ei_decode_version(header,&index,&version);
ei_decode_tuple_header(header,&index,&arity);
ei_decode_long(header,&index,&msg.msgtype);
switch (msg.msgtype) {
case ERL_SEND:
if (ei_decode_atom_as(header,&index,msg.cookie,sizeof(msg.cookie),ERLANG_UTF8,NULL,NULL)
|| ei_decode_pid(header,&index,&msg.to)) return -1;
mbuf = msgbuf;
break;
case ERL_SEND_TT:
if (ei_decode_atom_as(header,&index,msg.cookie,sizeof(msg.cookie),ERLANG_UTF8,NULL,NULL)
|| ei_decode_pid(header,&index,&msg.to)
|| ei_decode_trace(header,&index,&msg.token)) return -1;
mbuf = msgbuf;
break;
case ERL_REG_SEND:
if (ei_decode_pid(header,&index,&msg.from)
|| ei_decode_atom_as(header,&index,msg.cookie,sizeof(msg.cookie),ERLANG_UTF8,NULL,NULL)
|| ei_decode_atom_as(header,&index,msg.toname,sizeof(msg.toname),ERLANG_UTF8,NULL,NULL)) return -1;
mbuf = msgbuf;
break;
case ERL_REG_SEND_TT:
if (ei_decode_pid(header,&index,&msg.from)
|| ei_decode_atom_as(header,&index,msg.cookie,sizeof(msg.cookie),ERLANG_UTF8,NULL,NULL)
|| ei_decode_atom_as(header,&index,msg.toname,sizeof(msg.toname),ERLANG_UTF8,NULL,NULL)
|| ei_decode_trace(header,&index,&msg.token)) return -1;
mbuf = msgbuf;
break;
case ERL_EXIT:
case ERL_EXIT2:
if (ei_decode_pid(header,&index,&msg.from)
|| ei_decode_pid(header,&index,&msg.to)) return -1;
mbuf = header+index;
case ERL_EXIT_TT:
case ERL_EXIT2_TT:
if (ei_decode_pid(header,&index,&msg.from)
|| ei_decode_pid(header,&index,&msg.to)
|| ei_decode_trace(header,&index,&msg.token)) return -1;
mbuf = header+index;
break;
case ERL_LINK:
case ERL_UNLINK:
case ERL_GROUP_LEADER:
if (ei_decode_pid(header,&index,&msg.from)
|| ei_decode_pid(header,&index,&msg.to)) return -1;
mbuf = header;
break;
default:
break;
}
show_msg(stream, 1, &msg, mbuf);
return 0;
}
/***************************************************************************
*
* Common function for ei_show_recmsg() and ei_show_sendmsg()
*
***************************************************************************/
static void show_msg(FILE *stream, int direction, const erlang_msg *msg,
const char *buf)
{
if (direction) fprintf(stream,"-> ");
else fprintf(stream,"<- ");
switch (msg->msgtype) {
case ERL_LINK:
fprintf(stream,"LINK From: ");
show_pid(stream,&msg->from);
fprintf(stream," To: ");
show_pid(stream,&msg->to);
break;
case ERL_SEND:
fprintf(stream,"SEND To: ");
show_pid(stream,&msg->to);
fprintf(stream,"\n ");
/* show the message */
ei_efprint(stream,buf);
break;
case ERL_EXIT:
fprintf(stream,"EXIT From: ");
show_pid(stream,&msg->from);
fprintf(stream," To: ");
show_pid(stream,&msg->to);
/* show the reason */
fprintf(stream,"\n Reason: ");
ei_efprint(stream,buf);
break;
case ERL_UNLINK:
fprintf(stream,"UNLINK From: ");
show_pid(stream,&msg->from);
fprintf(stream," To: ");
show_pid(stream,&msg->to);
break;
case ERL_REG_SEND:
fprintf(stream,"REG_SEND From: ");
show_pid(stream,&msg->from);
fprintf(stream," To: %s\n ",msg->toname);
/* show the message */
ei_efprint(stream,buf);
break;
case ERL_GROUP_LEADER:
fprintf(stream,"GROUP_LEADER From: ");
show_pid(stream,&msg->from);
fprintf(stream," To: ");
show_pid(stream,&msg->to);
break;
case ERL_EXIT2:
fprintf(stream,"EXIT2 From: ");
show_pid(stream,&msg->from);
fprintf(stream," To: ");
show_pid(stream,&msg->to);
/* show the reason */
fprintf(stream,"\n Reason: ");
ei_efprint(stream,buf);
break;
/* the new TT stuff below */
case ERL_EXIT_TT:
fprintf(stream,"EXIT_TT From: ");
show_pid(stream,&msg->from);
fprintf(stream," To: ");
show_pid(stream,&msg->to);
fprintf(stream,"\n ");
show_trace(stream,&msg->token);
/* show the reason */
fprintf(stream,"\n Reason: ");
ei_efprint(stream,buf);
break;
case ERL_EXIT2_TT:
fprintf(stream,"EXIT2_TT From: ");
show_pid(stream,&msg->from);
fprintf(stream," To: ");
show_pid(stream,&msg->to);
fprintf(stream,"\n ");
show_trace(stream,&msg->token);
/* show the reason */
fprintf(stream,"\n Reason: ");
ei_efprint(stream,buf);
break;
case ERL_SEND_TT:
fprintf(stream,"SEND_TT To: ");
show_pid(stream,&msg->to);
fprintf(stream,"\n ");
show_trace(stream,&msg->token);
fprintf(stream,"\n ");
/* show the message */
ei_efprint(stream,buf);
break;
case ERL_REG_SEND_TT:
fprintf(stream,"REG_SEND_TT From: ");
show_pid(stream,&msg->from);
fprintf(stream," To: %s\n ",msg->toname);
show_trace(stream,&msg->token);
fprintf(stream,"\n ");
/* show the message */
ei_efprint(stream,buf);
break;
default:
fprintf(stream,"Unknown message type: %ld",msg->msgtype);
}
fprintf(stream,"\n");
}
/***************************************************************************
*
* Print term to stream with fprintf
*
***************************************************************************/
static void ei_efprint(FILE *stream, const char *termbuf)
{
int index = 0;
show_term(termbuf,&index,stream);
}
static void show_term(const char *termbuf, int *index, FILE *stream)
{
int type;
char smallbuf[EISHOWBUF];
int version;
long num;
double fnum;
erlang_pid pid;
erlang_port port;
erlang_ref ref;
int i, len;
char *s;
ei_get_type_internal(termbuf,index,&type,&len);
switch (type) {
case ERL_VERSION_MAGIC:
/* just skip past this */
ei_decode_version(termbuf,index,&version);
show_term(termbuf,index,stream);
break;
case ERL_ATOM_EXT:
ei_decode_atom(termbuf,index,smallbuf);
fprintf(stream,"%s",smallbuf);
break;
case ERL_STRING_EXT:
/* strings can be much longer than EISHOWBUF */
if (len < EISHOWBUF) s = smallbuf;
else if (!(s = malloc(len+1))) break; /* FIXME just break if can't? */
ei_decode_string(termbuf,index,s);
if (printable_list_p((uint8 *)s,len)) {
/* just show it as it is */
fprintf(stream,"\"%s\"",s);
} else {
/* show it as a list instead */
fprintf(stream,"[");
for (i=0; i<len; i++) {
if (i > 0) fprintf(stream,", ");
fprintf(stream,"%d",s[i]);
}
fprintf(stream,"]");
}
/* did we allocate anything? */
if (s && (s != smallbuf)) free(s);
break;
/* FIXME add case using ei_decode_longlong */
case ERL_SMALL_BIG_EXT:
case ERL_SMALL_INTEGER_EXT:
case ERL_INTEGER_EXT:
if (ei_decode_long(termbuf,index,&num) == 0) {
fprintf(stream,"%ld",num);
} else {
ei_decode_skip_bignum(termbuf,index,NULL);
fprintf(stream,"#Bignum");
}
break;
case ERL_FLOAT_EXT:
case NEW_FLOAT_EXT:
ei_decode_double(termbuf,index,&fnum);
fprintf(stream,"%f",fnum);
break;
case ERL_PID_EXT:
ei_decode_pid(termbuf,index,&pid);
show_pid(stream,&pid);
break;
case ERL_SMALL_TUPLE_EXT:
case ERL_LARGE_TUPLE_EXT:
ei_decode_tuple_header(termbuf,index,&len);
fprintf(stream,"{");
for (i=0; i<len; i++) {
if (i > 0) fprintf(stream,", ");
show_term(termbuf,index,stream);
}
fprintf(stream,"}");
break;
case ERL_LIST_EXT:
ei_decode_list_header(termbuf,index,&len);
fprintf(stream,"[");
for (i=0; i<len; i++) {
if (i > 0) fprintf(stream,", ");
show_term(termbuf,index,stream);
}
/* get the empty list at the end */
ei_decode_list_header(termbuf,index,&len);
fprintf(stream,"]");
break;
case ERL_NIL_EXT:
ei_decode_list_header(termbuf,index,&len);
fprintf(stream,"[]");
break;
case ERL_REFERENCE_EXT:
case ERL_NEW_REFERENCE_EXT:
ei_decode_ref(termbuf,index,&ref);
fprintf(stream,"#Ref<%s",ref.node);
for (i = 0; i < ref.len; i++) {
fprintf(stream,".%u",ref.n[i]);
}
fprintf(stream,".%u>",ref.creation);
break;
case ERL_PORT_EXT:
ei_decode_port(termbuf,index,&port);
fprintf(stream,"#Port<%s.%u.%u>",port.node,port.id,port.creation);
break;
case ERL_BINARY_EXT:
ei_decode_binary(termbuf,index,NULL,&num);
fprintf(stream,"#Bin<%ld>",num);
break;
case ERL_LARGE_BIG_EXT:
/* doesn't actually decode - just skip over it */
/* FIXME if GMP, what to do here?? */
ei_decode_skip_bignum(termbuf,index,NULL);
fprintf(stream,"#Bignum");
break;
case ERL_FUN_EXT: {
char atom[MAXATOMLEN];
long idx;
long uniq;
const char* s = termbuf + *index, * s0 = s;
int n_free;
++s;
n_free = get32be(s);
*index += s - s0;
ei_decode_pid(termbuf, index, NULL); /* skip pid */
ei_decode_atom(termbuf, index, atom); /* get module, index, uniq */
ei_decode_long(termbuf, index, &idx);
ei_decode_long(termbuf, index, &uniq);
fprintf(stream,"#Fun<%s.%ld.%ld>", atom, idx, uniq);
for (i = 0; i < n_free; ++i) {
/* FIXME how to report error ?! */
if (ei_skip_term(termbuf, index) != 0)
fprintf(stderr,"<ERROR> show_msg: unknown type of term !");
}
break;
}
default:
fprintf(stream,"#Unknown<%d.%d>",type,len);
/* unfortunately we don't know how to skip over this type in
* the buffer if we don't even know what it is, so we return.
*/
return;
break;
}
}
/***************************************************************************
*
* this help function does the actual decoding of the
* terms and is used by both ei_efprint and ei_sprintt.
*
* termbuf contains the undecoded term.
* idx is the current position in termbuf.
* stream is print destination, e.g. a FILE*
*
***************************************************************************/
static void show_pid(FILE *stream, const erlang_pid *pid)
{
fprintf(stream,"#Pid<%s.%u.%u.%u>",
pid->node,pid->num,pid->serial,pid->creation);
}
static void show_trace(FILE *stream, const erlang_trace *t)
{
fprintf(stream,
"Trace: Label: %ld, Flags: 0x%lx serial: %ld, prev: %ld From: ",
t->label,t->flags,t->serial,t->prev);
show_pid(stream,&t->from);
}
/***************************************************************************
*
* Try do decide if a buffer only contains printable characters
*
***************************************************************************/
/* we only need to initialize some of these (after 32 everything printable) */
/* FIXME they are not!!!! We use isprint() for now but we could create a */
/* custom print function that escape some non printable like \t and \n */
#if 0
static int non_printable[256] = {
/* 1 2 3 */
/* 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 */
1,1,1,1,1,1,1,1,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
/* \b\t\n\v\f\r */
};
#endif
static int printable_list_p(const uint8 *buf, int buflen)
{
int i;
for (i=0; i<buflen; i++) if (!isprint(buf[i])) return 0;
/* is printable */
return 1;
}
/***************************************************************************
*
* Skip over bignums, we can't print them
*
***************************************************************************/
/* FIXME we can if bignum small enough or if we use Per's functions or
if we have compiled in gmp support */
/* this function doesn't do anything but skip over the number in the buffer */
/* it doesn't really belong here either... */
static int ei_decode_skip_bignum(const char *buf, int *index, void *p)
{
const char *s = buf + *index;
const char *s0 = s;
long n;
switch (get8(s)) {
case ERL_LARGE_BIG_EXT:
n = get32be(s);
s += n+1;
break;
default:
erl_errno = EIO;
return -1;
}
*index += s-s0;
return 0;
}
