tesseract/ccutil/globaloc.cpp

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/**********************************************************************
2017-07-03 05:35:47 +08:00
* File: errcode.cpp (Formerly error.c)
* Description: Generic error handler function
* Author: Ray Smith
* Created: Tue May 1 16:28:39 BST 1990
*
* (C) Copyright 1989, Hewlett-Packard Ltd.
** 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.
*
**********************************************************************/
#include <signal.h>
#ifdef __linux__
#include <sys/syscall.h> // For SYS_gettid.
#include <unistd.h> // For syscall itself.
#endif
#include "allheaders.h"
#include "errcode.h"
#include "tprintf.h"
// Size of thread-id array of pixes to keep in case of crash.
const int kMaxNumThreadPixes = 32768;
Pix* global_crash_pixes[kMaxNumThreadPixes];
void SavePixForCrash(int resolution, Pix* pix) {
#ifdef __linux__
#ifndef ANDROID
int thread_id = syscall(SYS_gettid) % kMaxNumThreadPixes;
#else
int thread_id = gettid() % kMaxNumThreadPixes;
#endif
pixDestroy(&global_crash_pixes[thread_id]);
if (pix != NULL) {
Pix* clone = pixClone(pix);
pixSetXRes(clone, resolution);
pixSetYRes(clone, resolution);
global_crash_pixes[thread_id] = clone;
}
#endif
}
// CALL ONLY from a signal handler! Writes a crash image to stderr.
void signal_exit(int signal_code) {
tprintf("Received signal %d!\n", signal_code);
#ifdef __linux__
#ifndef ANDROID
int thread_id = syscall(SYS_gettid) % kMaxNumThreadPixes;
#else
int thread_id = gettid() % kMaxNumThreadPixes;
#endif
if (global_crash_pixes[thread_id] != NULL) {
fprintf(stderr, "Crash caused by image with resolution %d\n",
pixGetYRes(global_crash_pixes[thread_id]));
fprintf(stderr, "<Cut here>\n");
pixWriteStreamPng(stderr, global_crash_pixes[thread_id], 0.0);
fprintf(stderr, "\n<End cut>\n");
}
// Raise an uncaught signal, so as to get a useful stack trace.
raise(SIGILL);
#else
abort();
#endif
}
void err_exit() {
ASSERT_HOST("Fatal error encountered!" == NULL);
}
void set_global_loc_code(int loc_code) {
// global_loc_code = loc_code;
}
void set_global_subloc_code(int loc_code) {
// global_subloc_code = loc_code;
}
void set_global_subsubloc_code(int loc_code) {
// global_subsubloc_code = loc_code;
}