libc_logging.cpp revision 42084a265329538a9e696e41971fb5d6abe3c14f
15c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner/* 25c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * Copyright (C) 2010 The Android Open Source Project 35c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * All rights reserved. 45c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * 55c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * Redistribution and use in source and binary forms, with or without 65c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * modification, are permitted provided that the following conditions 75c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * are met: 85c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * * Redistributions of source code must retain the above copyright 95c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * notice, this list of conditions and the following disclaimer. 105c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * * Redistributions in binary form must reproduce the above copyright 115c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * notice, this list of conditions and the following disclaimer in 125c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * the documentation and/or other materials provided with the 135c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * distribution. 145c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * 155c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 165c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 175c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 185c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 195c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 205c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 215c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 225c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 235c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 245c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 255c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 265c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * SUCH DAMAGE. 275c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner */ 285c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 29eb847bc8666842a3cfc9c06e8458ad1abebebaf0Elliott Hughes#include "../private/libc_logging.h" // Relative path so we can #include this .cpp file for testing. 30eb847bc8666842a3cfc9c06e8458ad1abebebaf0Elliott Hughes#include "../private/ScopedPthreadMutexLocker.h" 31eababde2141c7128155200b213e45291cd876e46Elliott Hughes 32ce6b1abbb1da797e716d8ec03da4e3b6304fd11dDan Albert#include <android/set_abort_message.h> 3318a206c81d9743481e364384affd43306911283dElliott Hughes#include <assert.h> 34eababde2141c7128155200b213e45291cd876e46Elliott Hughes#include <errno.h> 350d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes#include <fcntl.h> 368f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes#include <pthread.h> 375c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner#include <stdarg.h> 38eababde2141c7128155200b213e45291cd876e46Elliott Hughes#include <stddef.h> 398f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes#include <stdlib.h> 405c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner#include <string.h> 410d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes#include <sys/mman.h> 420336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#include <sys/socket.h> 430336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#include <sys/types.h> 440d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes#include <sys/uio.h> 450336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#include <sys/un.h> 460336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#include <time.h> 475c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner#include <unistd.h> 48eababde2141c7128155200b213e45291cd876e46Elliott Hughes 491728b2396591853345507a063ed6075dfd251706Elliott Hughesstatic pthread_mutex_t g_abort_msg_lock = PTHREAD_MUTEX_INITIALIZER; 505c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 510d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes__LIBC_HIDDEN__ abort_msg_t** __abort_message_ptr; // Accessible to __libc_init_common. 525c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 530d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes// Must be kept in sync with frameworks/base/core/java/android/util/EventLog.java. 540d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesenum AndroidEventLogType { 550d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes EVENT_TYPE_INT = 0, 560d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes EVENT_TYPE_LONG = 1, 570d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes EVENT_TYPE_STRING = 2, 580d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes EVENT_TYPE_LIST = 3, 5918a206c81d9743481e364384affd43306911283dElliott Hughes}; 605c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 610d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstruct BufferOutputStream { 620d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes public: 630d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes BufferOutputStream(char* buffer, size_t size) : total(0) { 640d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes buffer_ = buffer; 650d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes end_ = buffer + size - 1; 660d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes pos_ = buffer_; 670d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes pos_[0] = '\0'; 680d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 695c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 700d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes ~BufferOutputStream() { 710d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 720d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 730d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes void Send(const char* data, int len) { 7418a206c81d9743481e364384affd43306911283dElliott Hughes if (len < 0) { 750d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes len = strlen(data); 7618a206c81d9743481e364384affd43306911283dElliott Hughes } 775c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 78416d7ddaff0946d480b6aa945a741b3eeaca5569Elliott Hughes total += len; 79416d7ddaff0946d480b6aa945a741b3eeaca5569Elliott Hughes 805c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner while (len > 0) { 810d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int avail = end_ - pos_; 820d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (avail == 0) { 83416d7ddaff0946d480b6aa945a741b3eeaca5569Elliott Hughes return; 840d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 850d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (avail > len) { 860d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes avail = len; 870d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 880d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes memcpy(pos_, data, avail); 890d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes pos_ += avail; 900d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes pos_[0] = '\0'; 910d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes len -= avail; 925c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 930d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 945c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 95416d7ddaff0946d480b6aa945a741b3eeaca5569Elliott Hughes size_t total; 965c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 970d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes private: 980d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char* buffer_; 990d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char* pos_; 1000d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char* end_; 1010d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes}; 1025c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1030d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstruct FdOutputStream { 1040d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes public: 1050d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes FdOutputStream(int fd) : total(0), fd_(fd) { 1061e980b6bc8315d00a07312b25486531247abd98cElliott Hughes } 1075c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1080d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes void Send(const char* data, int len) { 1090d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (len < 0) { 1100d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes len = strlen(data); 1110d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 1128f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 113416d7ddaff0946d480b6aa945a741b3eeaca5569Elliott Hughes total += len; 114416d7ddaff0946d480b6aa945a741b3eeaca5569Elliott Hughes 1150d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes while (len > 0) { 1160d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int rc = TEMP_FAILURE_RETRY(write(fd_, data, len)); 1170d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (rc == -1) { 118416d7ddaff0946d480b6aa945a741b3eeaca5569Elliott Hughes return; 1190d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 1200d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes data += rc; 1210d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes len -= rc; 1225c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 1231e980b6bc8315d00a07312b25486531247abd98cElliott Hughes } 1245c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 125416d7ddaff0946d480b6aa945a741b3eeaca5569Elliott Hughes size_t total; 1265c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1270d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes private: 1280d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int fd_; 1290d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes}; 1305c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1315c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner/*** formatted output implementation 1325c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner ***/ 1335c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1345c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner/* Parse a decimal string from 'format + *ppos', 1355c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * return the value, and writes the new position past 1365c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * the decimal string in '*ppos' on exit. 1375c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * 1385c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * NOTE: Does *not* handle a sign prefix. 1395c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner */ 1400d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstatic unsigned parse_decimal(const char *format, int *ppos) { 1415c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner const char* p = format + *ppos; 1425c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner unsigned result = 0; 1435c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1445c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner for (;;) { 1455c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner int ch = *p; 1460336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn unsigned d = static_cast<unsigned>(ch - '0'); 1475c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1480d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (d >= 10U) { 1495c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 1500d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 1515c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1525c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner result = result*10 + d; 1535c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner p++; 1545c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 1555c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner *ppos = p - format; 1565c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner return result; 1575c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner} 1585c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 159eababde2141c7128155200b213e45291cd876e46Elliott Hughes// Writes number 'value' in base 'base' into buffer 'buf' of size 'buf_size' bytes. 160eababde2141c7128155200b213e45291cd876e46Elliott Hughes// Assumes that buf_size > 0. 16141b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughesstatic void format_unsigned(char* buf, size_t buf_size, uint64_t value, int base, bool caps) { 162eababde2141c7128155200b213e45291cd876e46Elliott Hughes char* p = buf; 163eababde2141c7128155200b213e45291cd876e46Elliott Hughes char* end = buf + buf_size - 1; 164eababde2141c7128155200b213e45291cd876e46Elliott Hughes 165eababde2141c7128155200b213e45291cd876e46Elliott Hughes // Generate digit string in reverse order. 166eababde2141c7128155200b213e45291cd876e46Elliott Hughes while (value) { 167eababde2141c7128155200b213e45291cd876e46Elliott Hughes unsigned d = value % base; 168eababde2141c7128155200b213e45291cd876e46Elliott Hughes value /= base; 169eababde2141c7128155200b213e45291cd876e46Elliott Hughes if (p != end) { 170eababde2141c7128155200b213e45291cd876e46Elliott Hughes char ch; 171eababde2141c7128155200b213e45291cd876e46Elliott Hughes if (d < 10) { 172eababde2141c7128155200b213e45291cd876e46Elliott Hughes ch = '0' + d; 173eababde2141c7128155200b213e45291cd876e46Elliott Hughes } else { 174eababde2141c7128155200b213e45291cd876e46Elliott Hughes ch = (caps ? 'A' : 'a') + (d - 10); 175eababde2141c7128155200b213e45291cd876e46Elliott Hughes } 176eababde2141c7128155200b213e45291cd876e46Elliott Hughes *p++ = ch; 1775c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 178eababde2141c7128155200b213e45291cd876e46Elliott Hughes } 1795c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 180eababde2141c7128155200b213e45291cd876e46Elliott Hughes // Special case for 0. 181eababde2141c7128155200b213e45291cd876e46Elliott Hughes if (p == buf) { 182eababde2141c7128155200b213e45291cd876e46Elliott Hughes if (p != end) { 183eababde2141c7128155200b213e45291cd876e46Elliott Hughes *p++ = '0'; 1845c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 185eababde2141c7128155200b213e45291cd876e46Elliott Hughes } 186eababde2141c7128155200b213e45291cd876e46Elliott Hughes *p = '\0'; 187eababde2141c7128155200b213e45291cd876e46Elliott Hughes 188eababde2141c7128155200b213e45291cd876e46Elliott Hughes // Reverse digit string in-place. 189eababde2141c7128155200b213e45291cd876e46Elliott Hughes size_t length = p - buf; 190eababde2141c7128155200b213e45291cd876e46Elliott Hughes for (size_t i = 0, j = length - 1; i < j; ++i, --j) { 191eababde2141c7128155200b213e45291cd876e46Elliott Hughes char ch = buf[i]; 192eababde2141c7128155200b213e45291cd876e46Elliott Hughes buf[i] = buf[j]; 193eababde2141c7128155200b213e45291cd876e46Elliott Hughes buf[j] = ch; 194eababde2141c7128155200b213e45291cd876e46Elliott Hughes } 1955c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner} 1965c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 19741b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughesstatic void format_integer(char* buf, size_t buf_size, uint64_t value, char conversion) { 19841b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes // Decode the conversion specifier. 19941b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes int is_signed = (conversion == 'd' || conversion == 'i' || conversion == 'o'); 20041b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes int base = 10; 20141b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes if (conversion == 'x' || conversion == 'X') { 20241b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes base = 16; 20341b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes } else if (conversion == 'o') { 20441b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes base = 8; 20541b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes } 20641b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes bool caps = (conversion == 'X'); 2075c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 20841b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes if (is_signed && static_cast<int64_t>(value) < 0) { 20941b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes buf[0] = '-'; 21041b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes buf += 1; 21141b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes buf_size -= 1; 21241b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes value = static_cast<uint64_t>(-static_cast<int64_t>(value)); 21341b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes } 21441b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes format_unsigned(buf, buf_size, value, base, caps); 2155c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner} 2165c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2170d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughestemplate <typename Out> 2180d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstatic void SendRepeat(Out& o, char ch, int count) { 2190d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char pad[8]; 2200d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes memset(pad, ch, sizeof(pad)); 2210d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 2220d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes const int pad_size = static_cast<int>(sizeof(pad)); 2230d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes while (count > 0) { 2240d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int avail = count; 2250d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (avail > pad_size) { 2260d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes avail = pad_size; 2270d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 2280d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes o.Send(pad, avail); 2290d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes count -= avail; 2300d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 2310d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 2320d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 2335c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner/* Perform formatted output to an output target 'o' */ 2340d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughestemplate <typename Out> 2350d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstatic void out_vformat(Out& o, const char* format, va_list args) { 236ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int nn = 0; 2375c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2385c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner for (;;) { 239ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int mm; 240ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int padZero = 0; 241ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int padLeft = 0; 242ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden char sign = '\0'; 243ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int width = -1; 244ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int prec = -1; 245ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden size_t bytelen = sizeof(int); 246ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int slen; 247ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden char buffer[32]; /* temporary buffer used to format numbers */ 248ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden 2495c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner char c; 2505c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2515c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* first, find all characters that are not 0 or '%' */ 2525c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* then send them to the output directly */ 2535c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner mm = nn; 2545c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner do { 2555c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[mm]; 2565c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (c == '\0' || c == '%') 2575c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 2585c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner mm++; 2595c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } while (1); 2605c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2615c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (mm > nn) { 2620d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes o.Send(format+nn, mm-nn); 2635c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner nn = mm; 2645c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2655c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2665c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* is this it ? then exit */ 2675c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (c == '\0') 2685c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 2695c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2705c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* nope, we are at a '%' modifier */ 2715c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner nn++; // skip it 2725c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2735c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* parse flags */ 2745c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner for (;;) { 2755c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 2765c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (c == '\0') { /* single trailing '%' ? */ 2775c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = '%'; 2780d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes o.Send(&c, 1); 2795c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner return; 2805c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2815c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner else if (c == '0') { 2825c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner padZero = 1; 2835c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner continue; 2845c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2855c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner else if (c == '-') { 2865c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner padLeft = 1; 2875c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner continue; 2885c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2895c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner else if (c == ' ' || c == '+') { 2905c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner sign = c; 2915c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner continue; 2925c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2935c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 2945c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2955c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2965c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* parse field width */ 2975c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if ((c >= '0' && c <= '9')) { 2985c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner nn --; 2990336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn width = static_cast<int>(parse_decimal(format, &nn)); 3005c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3015c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3025c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3035c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* parse precision */ 3045c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (c == '.') { 3050336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn prec = static_cast<int>(parse_decimal(format, &nn)); 3065c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3075c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3085c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3095c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* length modifier */ 3105c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner switch (c) { 3115c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 'h': 3125c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(short); 3135c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (format[nn] == 'h') { 3145c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(char); 3155c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner nn += 1; 3165c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3175c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3185c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 3195c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 'l': 3205c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(long); 3215c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (format[nn] == 'l') { 3225c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(long long); 3235c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner nn += 1; 3245c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3255c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3265c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 3275c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 'z': 3285c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(size_t); 3295c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3305c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 3315c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 't': 3325c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(ptrdiff_t); 3335c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3345c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 3355c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner default: 3365c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner ; 3375c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3385c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3395c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* conversion specifier */ 34041b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes const char* str = buffer; 3415c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (c == 's') { 3425c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* string */ 3435c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner str = va_arg(args, const char*); 344239e7a0756fddf3698bf72cab10d7f382421090bElliott Hughes if (str == NULL) { 345239e7a0756fddf3698bf72cab10d7f382421090bElliott Hughes str = "(null)"; 346239e7a0756fddf3698bf72cab10d7f382421090bElliott Hughes } 3475c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } else if (c == 'c') { 3485c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* character */ 3495c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* NOTE: char is promoted to int when passed through the stack */ 3500336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn buffer[0] = static_cast<char>(va_arg(args, int)); 3515c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner buffer[1] = '\0'; 3525c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } else if (c == 'p') { 3530336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn uint64_t value = reinterpret_cast<uintptr_t>(va_arg(args, void*)); 3545c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner buffer[0] = '0'; 3555c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner buffer[1] = 'x'; 35641b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes format_integer(buffer + 2, sizeof(buffer) - 2, value, 'x'); 357885f3b9cad01b8158aadc55c159c17dbf34f622cChristopher Ferris } else if (c == 'd' || c == 'i' || c == 'o' || c == 'u' || c == 'x' || c == 'X') { 3585c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* integers - first read value from stack */ 3595c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner uint64_t value; 36041b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes int is_signed = (c == 'd' || c == 'i' || c == 'o'); 3615c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3625c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* NOTE: int8_t and int16_t are promoted to int when passed 3635c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * through the stack 3645c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner */ 3655c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner switch (bytelen) { 3660336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn case 1: value = static_cast<uint8_t>(va_arg(args, int)); break; 3670336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn case 2: value = static_cast<uint16_t>(va_arg(args, int)); break; 3685c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 4: value = va_arg(args, uint32_t); break; 3695c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 8: value = va_arg(args, uint64_t); break; 3705c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner default: return; /* should not happen */ 3715c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3725c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3735c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* sign extension, if needed */ 37441b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes if (is_signed) { 3755c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner int shift = 64 - 8*bytelen; 3760336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn value = static_cast<uint64_t>((static_cast<int64_t>(value << shift)) >> shift); 3775c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3785c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3795c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* format the number properly into our buffer */ 38041b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes format_integer(buffer, sizeof(buffer), value, c); 38141b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes } else if (c == '%') { 38241b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes buffer[0] = '%'; 38341b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes buffer[1] = '\0'; 38441b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes } else { 38541b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes __assert(__FILE__, __LINE__, "conversion specifier unsupported"); 3865c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3875c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3885c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* if we are here, 'str' points to the content that must be 3895c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * outputted. handle padding and alignment now */ 3905c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3915c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner slen = strlen(str); 3925c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 39318a206c81d9743481e364384affd43306911283dElliott Hughes if (sign != '\0' || prec != -1) { 39418a206c81d9743481e364384affd43306911283dElliott Hughes __assert(__FILE__, __LINE__, "sign/precision unsupported"); 39518a206c81d9743481e364384affd43306911283dElliott Hughes } 39618a206c81d9743481e364384affd43306911283dElliott Hughes 3975c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (slen < width && !padLeft) { 3985c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner char padChar = padZero ? '0' : ' '; 3990d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes SendRepeat(o, padChar, width - slen); 4005c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 4015c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 4020d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes o.Send(str, slen); 4035c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 4045c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (slen < width && padLeft) { 4055c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner char padChar = padZero ? '0' : ' '; 4060d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes SendRepeat(o, padChar, width - slen); 4075c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 4085c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 4095c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner} 4108f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 4110d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesint __libc_format_buffer(char* buffer, size_t buffer_size, const char* format, ...) { 4120d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes BufferOutputStream os(buffer, buffer_size); 4130d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_list args; 4140d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_start(args, format); 4150d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes out_vformat(os, format, args); 4160d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_end(args); 4170d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes return os.total; 4180d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 4190d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 4200d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesint __libc_format_fd(int fd, const char* format, ...) { 4210d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes FdOutputStream os(fd); 4220d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_list args; 4230d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_start(args, format); 4240d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes out_vformat(os, format, args); 4250d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_end(args); 4260d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes return os.total; 4270d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 4280d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 4290f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughesstatic int __libc_write_stderr(const char* tag, const char* msg) { 4300f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes int fd = TEMP_FAILURE_RETRY(open("/dev/stderr", O_CLOEXEC | O_WRONLY)); 4310f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes if (fd == -1) { 4320f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes return -1; 4330f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes } 4340f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes 4350f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes iovec vec[4]; 4360f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[0].iov_base = const_cast<char*>(tag); 4370f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[0].iov_len = strlen(tag); 4380f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[1].iov_base = const_cast<char*>(": "); 4390f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[1].iov_len = 2; 4400f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[2].iov_base = const_cast<char*>(msg); 44142084a265329538a9e696e41971fb5d6abe3c14fElliott Hughes vec[2].iov_len = strlen(msg); 4420f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[3].iov_base = const_cast<char*>("\n"); 4430f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[3].iov_len = 1; 4440f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes 4450f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes int result = TEMP_FAILURE_RETRY(writev(fd, vec, 4)); 4460f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes close(fd); 4470f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes return result; 4480f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes} 4490f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes 4500336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#ifdef TARGET_USES_LOGD 45142084a265329538a9e696e41971fb5d6abe3c14fElliott Hughesstatic int __libc_open_log_socket() { 4520336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // ToDo: Ideally we want this to fail if the gid of the current 4530336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // process is AID_LOGD, but will have to wait until we have 4540336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // registered this in private/android_filesystem_config.h. We have 4550336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // found that all logd crashes thus far have had no problem stuffing 4560336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // the UNIX domain socket and moving on so not critical *today*. 4570336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 458bae5b1dbd8dfe7318e208be917f4c9b9e8abced6Nick Kralevich int log_fd = TEMP_FAILURE_RETRY(socket(PF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0)); 4590336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn if (log_fd < 0) { 4600336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn return -1; 4610336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn } 4620336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4630336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn if (fcntl(log_fd, F_SETFL, O_NONBLOCK) == -1) { 4640336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn close(log_fd); 4650336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn return -1; 4660336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn } 4670336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4680336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn union { 4690336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn struct sockaddr addr; 4700336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn struct sockaddr_un addrUn; 4710336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn } u; 4720336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn memset(&u, 0, sizeof(u)); 4730336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn u.addrUn.sun_family = AF_UNIX; 4740336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn strlcpy(u.addrUn.sun_path, "/dev/socket/logdw", sizeof(u.addrUn.sun_path)); 4750336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4760336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn if (TEMP_FAILURE_RETRY(connect(log_fd, &u.addr, sizeof(u.addrUn))) != 0) { 4770336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn close(log_fd); 4780336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn return -1; 4790336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn } 4800336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4810336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn return log_fd; 4820336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn} 4839fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn 4849fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzynstruct log_time { // Wire format 4859fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn uint32_t tv_sec; 4869fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn uint32_t tv_nsec; 4879fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn}; 4880336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#endif 4890336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4900d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstatic int __libc_write_log(int priority, const char* tag, const char* msg) { 4910336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#ifdef TARGET_USES_LOGD 4920336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn int main_log_fd = __libc_open_log_socket(); 4930336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn if (main_log_fd == -1) { 4940336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // Try stderr instead. 4950336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn return __libc_write_stderr(tag, msg); 4960336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn } 4970336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4988664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn iovec vec[6]; 499011101905d91b770893e8a2fb6c09552d1c63652Elliott Hughes char log_id = (priority == ANDROID_LOG_FATAL) ? LOG_ID_CRASH : LOG_ID_MAIN; 5000336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn vec[0].iov_base = &log_id; 5010336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn vec[0].iov_len = sizeof(log_id); 5028664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn uint16_t tid = gettid(); 5038664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[1].iov_base = &tid; 5048664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[1].iov_len = sizeof(tid); 5059fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn timespec ts; 5069fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn clock_gettime(CLOCK_REALTIME, &ts); 5079fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn log_time realtime_ts; 5089fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn realtime_ts.tv_sec = ts.tv_sec; 5099fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn realtime_ts.tv_nsec = ts.tv_nsec; 5108664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[2].iov_base = &realtime_ts; 5118664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[2].iov_len = sizeof(realtime_ts); 5128664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn 5138664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[3].iov_base = &priority; 5148664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[3].iov_len = 1; 5158664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[4].iov_base = const_cast<char*>(tag); 51642084a265329538a9e696e41971fb5d6abe3c14fElliott Hughes vec[4].iov_len = strlen(tag); 5178664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[5].iov_base = const_cast<char*>(msg); 51842084a265329538a9e696e41971fb5d6abe3c14fElliott Hughes vec[5].iov_len = strlen(msg); 5190336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#else 52017fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich int main_log_fd = TEMP_FAILURE_RETRY(open("/dev/log/main", O_CLOEXEC | O_WRONLY)); 5210d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (main_log_fd == -1) { 5220f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes if (errno == ENOTDIR) { 5230f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes // /dev/log isn't a directory? Maybe we're running on the host? Try stderr instead. 5240f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes return __libc_write_stderr(tag, msg); 5250f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes } 52617fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich return -1; 5270d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 5280d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 5290d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes iovec vec[3]; 5300d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes vec[0].iov_base = &priority; 5310d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes vec[0].iov_len = 1; 5320d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes vec[1].iov_base = const_cast<char*>(tag); 53342084a265329538a9e696e41971fb5d6abe3c14fElliott Hughes vec[1].iov_len = strlen(tag); 5340d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes vec[2].iov_base = const_cast<char*>(msg); 53542084a265329538a9e696e41971fb5d6abe3c14fElliott Hughes vec[2].iov_len = strlen(msg); 5360336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#endif 5370d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 5380336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn int result = TEMP_FAILURE_RETRY(writev(main_log_fd, vec, sizeof(vec) / sizeof(vec[0]))); 53917fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich close(main_log_fd); 54017fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich return result; 5410d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 5420d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 5430d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesint __libc_format_log_va_list(int priority, const char* tag, const char* format, va_list args) { 5440d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char buffer[1024]; 5450d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes BufferOutputStream os(buffer, sizeof(buffer)); 5460d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes out_vformat(os, format, args); 5470d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes return __libc_write_log(priority, tag, buffer); 5480d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 5490d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 5500d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesint __libc_format_log(int priority, const char* tag, const char* format, ...) { 5510d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_list args; 5520d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_start(args, format); 5530d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int result = __libc_format_log_va_list(priority, tag, format, args); 5540d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_end(args); 5550d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes return result; 5560d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 5578f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 5588f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughesstatic int __libc_android_log_event(int32_t tag, char type, const void* payload, size_t len) { 5590336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#ifdef TARGET_USES_LOGD 5608664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn iovec vec[6]; 5610336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn char log_id = LOG_ID_EVENTS; 5620336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn vec[0].iov_base = &log_id; 5630336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn vec[0].iov_len = sizeof(log_id); 5648664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn uint16_t tid = gettid(); 5658664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[1].iov_base = &tid; 5668664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[1].iov_len = sizeof(tid); 5679fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn timespec ts; 5689fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn clock_gettime(CLOCK_REALTIME, &ts); 5699fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn log_time realtime_ts; 5709fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn realtime_ts.tv_sec = ts.tv_sec; 5719fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn realtime_ts.tv_nsec = ts.tv_nsec; 5728664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[2].iov_base = &realtime_ts; 5738664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[2].iov_len = sizeof(realtime_ts); 5748664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn 5758664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[3].iov_base = &tag; 5768664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[3].iov_len = sizeof(tag); 5778664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[4].iov_base = &type; 5788664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[4].iov_len = sizeof(type); 5798664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[5].iov_base = const_cast<void*>(payload); 5808664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[5].iov_len = len; 5810336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 5820336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn int event_log_fd = __libc_open_log_socket(); 5830336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#else 5840d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes iovec vec[3]; 5858f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[0].iov_base = &tag; 5868f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[0].iov_len = sizeof(tag); 5878f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[1].iov_base = &type; 5888f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[1].iov_len = sizeof(type); 5898f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[2].iov_base = const_cast<void*>(payload); 5908f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[2].iov_len = len; 5918f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 59217fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich int event_log_fd = TEMP_FAILURE_RETRY(open("/dev/log/events", O_CLOEXEC | O_WRONLY)); 5930336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#endif 5940336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 5958f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes if (event_log_fd == -1) { 59617fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich return -1; 5978f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes } 5980336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn int result = TEMP_FAILURE_RETRY(writev(event_log_fd, vec, sizeof(vec) / sizeof(vec[0]))); 59917fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich close(event_log_fd); 60017fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich return result; 6018f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes} 6028f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 6038f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughesvoid __libc_android_log_event_int(int32_t tag, int value) { 6048f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes __libc_android_log_event(tag, EVENT_TYPE_INT, &value, sizeof(value)); 6058f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes} 6068f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 6078f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughesvoid __libc_android_log_event_uid(int32_t tag) { 6088f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes __libc_android_log_event_int(tag, getuid()); 6098f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes} 6108f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 611d1eda33f012e46083b91e087fb79d14a5ce70f0eElliott Hughesvoid __fortify_chk_fail(const char* msg, uint32_t tag) { 6128f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes if (tag != 0) { 6138f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes __libc_android_log_event_uid(tag); 6148f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes } 61542084a265329538a9e696e41971fb5d6abe3c14fElliott Hughes __libc_fatal("FORTIFY: %s", msg); 6160d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 6170d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 618c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughesstatic void __libc_fatal(const char* format, va_list args) { 6190d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char msg[1024]; 6200d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes BufferOutputStream os(msg, sizeof(msg)); 6210d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes out_vformat(os, format, args); 6220d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 62342084a265329538a9e696e41971fb5d6abe3c14fElliott Hughes // Log to stderr for the benefit of "adb shell" users. 62497e31dedf056b07bcfcd46c49b60bf0798c60843Dan Albert struct iovec iov[2] = { 62542084a265329538a9e696e41971fb5d6abe3c14fElliott Hughes { msg, os.total }, 62642084a265329538a9e696e41971fb5d6abe3c14fElliott Hughes { const_cast<char*>("\n"), 1 }, 62797e31dedf056b07bcfcd46c49b60bf0798c60843Dan Albert }; 62842084a265329538a9e696e41971fb5d6abe3c14fElliott Hughes TEMP_FAILURE_RETRY(writev(2, iov, 2)); 6290d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 6300d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes // Log to the log for the benefit of regular app developers (whose stdout and stderr are closed). 631c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes __libc_write_log(ANDROID_LOG_FATAL, "libc", msg); 6320d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 633ce6b1abbb1da797e716d8ec03da4e3b6304fd11dDan Albert android_set_abort_message(msg); 63461e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes} 63561e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes 63661e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughesvoid __libc_fatal_no_abort(const char* format, ...) { 63761e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes va_list args; 63861e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes va_start(args, format); 639c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes __libc_fatal(format, args); 64061e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes va_end(args); 64161e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes} 6420d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 64361e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughesvoid __libc_fatal(const char* format, ...) { 64461e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes va_list args; 64561e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes va_start(args, format); 646c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes __libc_fatal(format, args); 6472e3b7108b5b3d3f3a4a0fb369016e854bcf92212Elliott Hughes va_end(args); 6482e3b7108b5b3d3f3a4a0fb369016e854bcf92212Elliott Hughes abort(); 6492e3b7108b5b3d3f3a4a0fb369016e854bcf92212Elliott Hughes} 6502e3b7108b5b3d3f3a4a0fb369016e854bcf92212Elliott Hughes 651ce6b1abbb1da797e716d8ec03da4e3b6304fd11dDan Albertvoid android_set_abort_message(const char* msg) { 6521728b2396591853345507a063ed6075dfd251706Elliott Hughes ScopedPthreadMutexLocker locker(&g_abort_msg_lock); 653c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes 654c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes if (__abort_message_ptr == NULL) { 655c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes // We must have crashed _very_ early. 656c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes return; 657c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes } 658c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes 659c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes if (*__abort_message_ptr != NULL) { 660c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes // We already have an abort message. 661c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes // Assume that the first crash is the one most worth reporting. 662c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes return; 663c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes } 6640d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 6650d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes size_t size = sizeof(abort_msg_t) + strlen(msg) + 1; 6660d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes void* map = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); 6670d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (map == MAP_FAILED) { 6680d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes return; 6690d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 6700d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 671c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes // TODO: if we stick to the current "one-shot" scheme, we can remove this code and 672c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes // stop storing the size. 673c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes if (*__abort_message_ptr != NULL) { 674c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes munmap(*__abort_message_ptr, (*__abort_message_ptr)->size); 6750d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 676c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes abort_msg_t* new_abort_message = reinterpret_cast<abort_msg_t*>(map); 677c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes new_abort_message->size = size; 678c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes strcpy(new_abort_message->msg, msg); 679c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes *__abort_message_ptr = new_abort_message; 6800d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 681