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/*
* This file is part of ltrace.
* Copyright (C) 2011,2012 Petr Machata, Red Hat Inc.
* Copyright (C) 2010 Joe Damato
* Copyright (C) 1997,1998,1999,2001,2002,2003,2004,2007,2008,2009 Juan Cespedes
* Copyright (C) 2006 Paul Gilliam, IBM Corporation
* Copyright (C) 2006 Ian Wienand
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
/* glibc before 2.10, eglibc and uClibc all need _GNU_SOURCE defined
* for open_memstream to become visible. */
#define _GNU_SOURCE
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include "common.h"
#include "proc.h"
#include "library.h"
#include "type.h"
#include "value.h"
#include "value_dict.h"
#include "param.h"
#include "fetch.h"
#include "lens_default.h"
/* TODO FIXME XXX: include in common.h: */
extern struct timeval current_time_spent;
Dict *dict_opt_c = NULL;
static Process *current_proc = 0;
static size_t current_depth = 0;
static int current_column = 0;
static void
output_indent(struct Process *proc)
{
int d = options.indent * (proc->callstack_depth - 1);
current_column += fprintf(options.output, "%*s", d, "");
}
static void
begin_of_line(Process *proc, int is_func, int indent)
{
current_column = 0;
if (!proc) {
return;
}
if ((options.output != stderr) && (opt_p || options.follow)) {
current_column += fprintf(options.output, "%u ", proc->pid);
} else if (options.follow) {
current_column += fprintf(options.output, "[pid %u] ", proc->pid);
}
if (opt_r) {
struct timeval tv;
struct timezone tz;
static struct timeval old_tv = { 0, 0 };
struct timeval diff;
gettimeofday(&tv, &tz);
if (old_tv.tv_sec == 0 && old_tv.tv_usec == 0) {
old_tv.tv_sec = tv.tv_sec;
old_tv.tv_usec = tv.tv_usec;
}
diff.tv_sec = tv.tv_sec - old_tv.tv_sec;
if (tv.tv_usec >= old_tv.tv_usec) {
diff.tv_usec = tv.tv_usec - old_tv.tv_usec;
} else {
diff.tv_sec--;
diff.tv_usec = 1000000 + tv.tv_usec - old_tv.tv_usec;
}
old_tv.tv_sec = tv.tv_sec;
old_tv.tv_usec = tv.tv_usec;
current_column += fprintf(options.output, "%3lu.%06d ",
(unsigned long)diff.tv_sec,
(int)diff.tv_usec);
}
if (opt_t) {
struct timeval tv;
struct timezone tz;
gettimeofday(&tv, &tz);
if (opt_t > 2) {
current_column += fprintf(options.output, "%lu.%06d ",
(unsigned long)tv.tv_sec,
(int)tv.tv_usec);
} else if (opt_t > 1) {
struct tm *tmp = localtime(&tv.tv_sec);
current_column +=
fprintf(options.output, "%02d:%02d:%02d.%06d ",
tmp->tm_hour, tmp->tm_min, tmp->tm_sec,
(int)tv.tv_usec);
} else {
struct tm *tmp = localtime(&tv.tv_sec);
current_column += fprintf(options.output, "%02d:%02d:%02d ",
tmp->tm_hour, tmp->tm_min,
tmp->tm_sec);
}
}
if (opt_i) {
if (is_func)
current_column += fprintf(options.output, "[%p] ",
proc->return_addr);
else
current_column += fprintf(options.output, "[%p] ",
proc->instruction_pointer);
}
if (options.indent > 0 && indent) {
output_indent(proc);
}
}
static struct arg_type_info *
get_unknown_type(void)
{
static struct arg_type_info *info = NULL;
if (info == NULL) {
info = malloc(sizeof(*info));
if (info == NULL) {
report_global_error("malloc: %s", strerror(errno));
abort();
}
*info = *type_get_simple(ARGTYPE_LONG);
info->lens = &guess_lens;
}
return info;
}
/* The default prototype is: long X(long, long, long, long). */
static Function *
build_default_prototype(void)
{
Function *ret = malloc(sizeof(*ret));
size_t i = 0;
if (ret == NULL)
goto err;
memset(ret, 0, sizeof(*ret));
struct arg_type_info *unknown_type = get_unknown_type();
ret->return_info = unknown_type;
ret->own_return_info = 0;
ret->num_params = 4;
ret->params = malloc(sizeof(*ret->params) * ret->num_params);
if (ret->params == NULL)
goto err;
for (i = 0; i < ret->num_params; ++i)
param_init_type(&ret->params[i], unknown_type, 0);
return ret;
err:
report_global_error("malloc: %s", strerror(errno));
if (ret->params != NULL) {
while (i-- > 0)
param_destroy(&ret->params[i]);
free(ret->params);
}
free(ret);
return NULL;
}
static Function *
name2func(char const *name) {
Function *tmp;
const char *str1, *str2;
for (tmp = list_of_functions; tmp != NULL; tmp = tmp->next) {
str1 = tmp->name;
str2 = name;
if (!strcmp(str1, str2))
return tmp;
}
static Function *def = NULL;
if (def == NULL)
def = build_default_prototype();
return def;
}
void
output_line(struct Process *proc, const char *fmt, ...)
{
if (options.summary)
return;
if (current_proc != NULL) {
if (current_proc->callstack[current_depth].return_addr)
fprintf(options.output, " <unfinished ...>\n");
else
fprintf(options.output, " <no return ...>\n");
}
current_proc = NULL;
if (fmt == NULL)
return;
begin_of_line(proc, 0, 0);
va_list args;
va_start(args, fmt);
vfprintf(options.output, fmt, args);
fprintf(options.output, "\n");
va_end(args);
current_column = 0;
}
static void
tabto(int col) {
if (current_column < col) {
fprintf(options.output, "%*s", col - current_column, "");
}
}
static int
output_error(FILE *stream)
{
return fprintf(stream, "?");
}
static int
fetch_simple_param(enum tof type, Process *proc, struct fetch_context *context,
struct value_dict *arguments,
struct arg_type_info *info, int own,
struct value *valuep)
{
/* Arrays decay into pointers per C standard. We check for
* this here, because here we also capture arrays that come
* from parameter packs. */
if (info->type == ARGTYPE_ARRAY) {
struct arg_type_info *tmp = malloc(sizeof(*tmp));
if (tmp != NULL) {
type_init_pointer(tmp, info, own);
tmp->lens = info->lens;
info = tmp;
own = 1;
}
}
struct value value;
value_init(&value, proc, NULL, info, own);
if (fetch_arg_next(context, type, proc, info, &value) < 0)
return -1;
if (val_dict_push_next(arguments, &value) < 0) {
value_destroy(&value);
return -1;
}
if (valuep != NULL)
*valuep = value;
return 0;
}
static void
fetch_param_stop(struct value_dict *arguments, ssize_t *params_leftp)
{
if (*params_leftp == -1)
*params_leftp = val_dict_count(arguments);
}
static int
fetch_param_pack(enum tof type, Process *proc, struct fetch_context *context,
struct value_dict *arguments, struct param *param,
ssize_t *params_leftp)
{
struct param_enum *e = param_pack_init(param, arguments);
if (e == NULL)
return -1;
int ret = 0;
while (1) {
int insert_stop = 0;
struct arg_type_info *info = malloc(sizeof(*info));
if (info == NULL
|| param_pack_next(param, e, info, &insert_stop) < 0) {
fail:
free(info);
ret = -1;
break;
}
if (insert_stop)
fetch_param_stop(arguments, params_leftp);
if (info->type == ARGTYPE_VOID) {
type_destroy(info);
free(info);
break;
}
struct value val;
if (fetch_simple_param(type, proc, context, arguments,
info, 1, &val) < 0)
goto fail;
int stop = 0;
switch (param_pack_stop(param, e, &val)) {
case PPCB_ERR:
goto fail;
case PPCB_STOP:
stop = 1;
case PPCB_CONT:
break;
}
if (stop)
break;
}
param_pack_done(param, e);
return ret;
}
static int
fetch_one_param(enum tof type, Process *proc, struct fetch_context *context,
struct value_dict *arguments, struct param *param,
ssize_t *params_leftp)
{
switch (param->flavor) {
int rc;
case PARAM_FLAVOR_TYPE:
return fetch_simple_param(type, proc, context, arguments,
param->u.type.type, 0, NULL);
case PARAM_FLAVOR_PACK:
if (fetch_param_pack_start(context,
param->u.pack.ppflavor) < 0)
return -1;
rc = fetch_param_pack(type, proc, context, arguments,
param, params_leftp);
fetch_param_pack_end(context);
return rc;
case PARAM_FLAVOR_STOP:
fetch_param_stop(arguments, params_leftp);
return 0;
}
assert(!"Invalid param flavor!");
abort();
}
static int
fetch_params(enum tof type, Process *proc, struct fetch_context *context,
struct value_dict *arguments, Function *func, ssize_t *params_leftp)
{
size_t i;
for (i = 0; i < func->num_params; ++i)
if (fetch_one_param(type, proc, context, arguments,
&func->params[i], params_leftp) < 0)
return -1;
/* Implicit stop at the end of parameter list. */
fetch_param_stop(arguments, params_leftp);
return 0;
}
struct format_argument_data
{
struct value *value;
struct value_dict *arguments;
};
static int
format_argument_cb(FILE *stream, void *ptr)
{
struct format_argument_data *data = ptr;
int o = format_argument(stream, data->value, data->arguments);
if (o < 0)
o = output_error(stream);
return o;
}
static int
output_params(struct value_dict *arguments, size_t start, size_t end,
int *need_delimp)
{
size_t i;
for (i = start; i < end; ++i) {
struct value *value = val_dict_get_num(arguments, i);
if (value == NULL)
return -1;
struct format_argument_data data = { value, arguments };
int o = delim_output(options.output, need_delimp,
format_argument_cb, &data);
if (o < 0)
return -1;
current_column += o;
}
return 0;
}
void
output_left(enum tof type, struct Process *proc,
struct library_symbol *libsym)
{
const char *function_name = libsym->name;
Function *func;
if (options.summary) {
return;
}
if (current_proc) {
fprintf(options.output, " <unfinished ...>\n");
current_column = 0;
}
current_proc = proc;
current_depth = proc->callstack_depth;
begin_of_line(proc, type == LT_TOF_FUNCTION, 1);
if (!options.hide_caller && libsym->lib != NULL
&& libsym->plt_type != LS_TOPLT_NONE)
/* We don't terribly mind failing this. */
account_output(¤t_column,
fprintf(options.output, "%s->",
libsym->lib->soname));
const char *name = function_name;
#ifdef USE_DEMANGLE
if (options.demangle)
name = my_demangle(function_name);
#endif
if (account_output(¤t_column,
fprintf(options.output, "%s", name)) < 0)
return;
if (libsym->lib != NULL
&& libsym->lib->type != LT_LIBTYPE_MAIN
&& libsym->plt_type == LS_TOPLT_NONE
&& account_output(¤t_column,
fprintf(options.output, "@%s",
libsym->lib->soname)) < 0)
/* We do mind failing this though. */
return;
account_output(¤t_column, fprintf(options.output, "("));
func = name2func(function_name);
if (func == NULL) {
account_output(¤t_column, fprintf(options.output, "???"));
return;
}
struct fetch_context *context = fetch_arg_init(type, proc,
func->return_info);
struct value_dict *arguments = malloc(sizeof(*arguments));
if (arguments == NULL)
return;
val_dict_init(arguments);
ssize_t params_left = -1;
int need_delim = 0;
if (fetch_params(type, proc, context, arguments, func, ¶ms_left) < 0
|| output_params(arguments, 0, params_left, &need_delim) < 0) {
val_dict_destroy(arguments);
fetch_arg_done(context);
arguments = NULL;
context = NULL;
}
struct callstack_element *stel
= &proc->callstack[proc->callstack_depth - 1];
stel->fetch_context = context;
stel->arguments = arguments;
stel->out.params_left = params_left;
stel->out.need_delim = need_delim;
}
void
output_right(enum tof type, struct Process *proc, struct library_symbol *libsym)
{
const char *function_name = libsym->name;
Function *func = name2func(function_name);
if (func == NULL)
return;
if (options.summary) {
struct opt_c_struct *st;
if (!dict_opt_c) {
dict_opt_c =
dict_init(dict_key2hash_string,
dict_key_cmp_string);
}
st = dict_find_entry(dict_opt_c, function_name);
if (!st) {
char *na;
st = malloc(sizeof(struct opt_c_struct));
na = strdup(function_name);
if (!st || !na) {
perror("malloc()");
exit(1);
}
st->count = 0;
st->tv.tv_sec = st->tv.tv_usec = 0;
dict_enter(dict_opt_c, na, st);
}
if (st->tv.tv_usec + current_time_spent.tv_usec > 1000000) {
st->tv.tv_usec += current_time_spent.tv_usec - 1000000;
st->tv.tv_sec++;
} else {
st->tv.tv_usec += current_time_spent.tv_usec;
}
st->count++;
st->tv.tv_sec += current_time_spent.tv_sec;
// fprintf(options.output, "%s <%lu.%06d>\n", function_name,
// current_time_spent.tv_sec, (int)current_time_spent.tv_usec);
return;
}
if (current_proc && (current_proc != proc ||
current_depth != proc->callstack_depth)) {
fprintf(options.output, " <unfinished ...>\n");
current_proc = 0;
}
if (current_proc != proc) {
begin_of_line(proc, type == LT_TOF_FUNCTIONR, 1);
#ifdef USE_DEMANGLE
current_column +=
fprintf(options.output, "<... %s resumed> ",
options.demangle ? my_demangle(function_name) : function_name);
#else
current_column +=
fprintf(options.output, "<... %s resumed> ", function_name);
#endif
}
struct callstack_element *stel
= &proc->callstack[proc->callstack_depth - 1];
struct fetch_context *context = stel->fetch_context;
/* Fetch & enter into dictionary the retval first, so that
* other values can use it in expressions. */
struct value retval;
int own_retval = 0;
if (context != NULL) {
value_init(&retval, proc, NULL, func->return_info, 0);
own_retval = 1;
if (fetch_retval(context, type, proc, func->return_info,
&retval) < 0)
value_set_type(&retval, NULL, 0);
else if (stel->arguments != NULL
&& val_dict_push_named(stel->arguments, &retval,
"retval", 0) == 0)
own_retval = 0;
}
if (stel->arguments != NULL)
output_params(stel->arguments, stel->out.params_left,
val_dict_count(stel->arguments),
&stel->out.need_delim);
current_column += fprintf(options.output, ") ");
tabto(options.align - 1);
fprintf(options.output, "= ");
if (context != NULL && retval.type != NULL) {
struct format_argument_data data = { &retval, stel->arguments };
format_argument_cb(options.output, &data);
}
if (own_retval)
value_destroy(&retval);
if (opt_T) {
fprintf(options.output, " <%lu.%06d>",
(unsigned long)current_time_spent.tv_sec,
(int)current_time_spent.tv_usec);
}
fprintf(options.output, "\n");
#if defined(HAVE_LIBUNWIND)
if (options.bt_depth > 0) {
unw_cursor_t cursor;
unw_word_t ip, sp;
int unwind_depth = options.bt_depth;
char fn_name[100];
unw_init_remote(&cursor, proc->unwind_as, proc->unwind_priv);
while (unwind_depth) {
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
unw_get_proc_name(&cursor, fn_name, 100, NULL);
fprintf(options.output, "\t\t\t%s (ip = 0x%lx)\n", fn_name, (long) ip);
if (unw_step(&cursor) <= 0)
break;
unwind_depth--;
}
fprintf(options.output, "\n");
}
#endif /* defined(HAVE_LIBUNWIND) */
current_proc = 0;
current_column = 0;
}
int
delim_output(FILE *stream, int *need_delimp,
int (*writer)(FILE *stream, void *data),
void *data)
{
int o;
/* If we don't need a delimiter, then we don't need to go
* through a temporary stream. It's all the same whether
* WRITER emits anything or not. */
if (!*need_delimp) {
o = writer(stream, data);
} else {
char *buf;
size_t bufsz;
FILE *tmp = open_memstream(&buf, &bufsz);
o = writer(tmp, data);
fclose(tmp);
if (o > 0 && ((*need_delimp
&& account_output(&o, fprintf(stream, ", ")) < 0)
|| fwrite(buf, 1, bufsz, stream) != bufsz))
o = -1;
free(buf);
}
if (o < 0)
return -1;
*need_delimp = *need_delimp || o > 0;
return o;
}
int
account_output(int *countp, int c)
{
if (c > 0)
*countp += c;
return c;
}
static void
do_report(const char *filename, unsigned line_no, const char *severity,
const char *fmt, va_list args)
{
char buf[128];
vsnprintf(buf, sizeof(buf), fmt, args);
buf[sizeof(buf) - 1] = 0;
if (filename != NULL)
output_line(0, "%s:%d: %s: %s",
filename, line_no, severity, buf);
else
output_line(0, "%s: %s", severity, buf);
}
void
report_error(const char *filename, unsigned line_no, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_report(filename, line_no, "error", fmt, args);
va_end(args);
}
void
report_warning(const char *filename, unsigned line_no, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_report(filename, line_no, "warning", fmt, args);
va_end(args);
}
void
report_global_error(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_report(NULL, 0, "error", fmt, args);
va_end(args);
}
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