libc_logging.cpp revision 97e31dedf056b07bcfcd46c49b60bf0798c60843
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 3218a206c81d9743481e364384affd43306911283dElliott Hughes#include <assert.h> 33eababde2141c7128155200b213e45291cd876e46Elliott Hughes#include <errno.h> 340d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes#include <fcntl.h> 358f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes#include <pthread.h> 365c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner#include <stdarg.h> 37eababde2141c7128155200b213e45291cd876e46Elliott Hughes#include <stddef.h> 388f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes#include <stdlib.h> 395c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner#include <string.h> 400d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes#include <sys/mman.h> 410336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#include <sys/socket.h> 420336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#include <sys/types.h> 430d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes#include <sys/uio.h> 440336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#include <sys/un.h> 450336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#include <time.h> 465c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner#include <unistd.h> 47eababde2141c7128155200b213e45291cd876e46Elliott Hughes 481728b2396591853345507a063ed6075dfd251706Elliott Hughesstatic pthread_mutex_t g_abort_msg_lock = PTHREAD_MUTEX_INITIALIZER; 495c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 500d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes__LIBC_HIDDEN__ abort_msg_t** __abort_message_ptr; // Accessible to __libc_init_common. 515c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 520d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes// Must be kept in sync with frameworks/base/core/java/android/util/EventLog.java. 530d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesenum AndroidEventLogType { 540d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes EVENT_TYPE_INT = 0, 550d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes EVENT_TYPE_LONG = 1, 560d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes EVENT_TYPE_STRING = 2, 570d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes EVENT_TYPE_LIST = 3, 5818a206c81d9743481e364384affd43306911283dElliott Hughes}; 595c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 600d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstruct BufferOutputStream { 610d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes public: 620d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes BufferOutputStream(char* buffer, size_t size) : total(0) { 630d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes buffer_ = buffer; 640d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes end_ = buffer + size - 1; 650d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes pos_ = buffer_; 660d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes pos_[0] = '\0'; 670d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 685c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 690d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes ~BufferOutputStream() { 700d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 710d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 720d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes void Send(const char* data, int len) { 7318a206c81d9743481e364384affd43306911283dElliott Hughes if (len < 0) { 740d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes len = strlen(data); 7518a206c81d9743481e364384affd43306911283dElliott Hughes } 765c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 775c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner while (len > 0) { 780d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int avail = end_ - pos_; 790d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (avail == 0) { 800d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes break; 810d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 820d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (avail > len) { 830d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes avail = len; 840d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 850d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes memcpy(pos_, data, avail); 860d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes pos_ += avail; 870d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes pos_[0] = '\0'; 880d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes len -= avail; 890d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes total += avail; 905c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 910d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 925c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 9318a206c81d9743481e364384affd43306911283dElliott Hughes int total; 945c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 950d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes private: 960d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char* buffer_; 970d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char* pos_; 980d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char* end_; 990d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes}; 1005c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1010d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstruct FdOutputStream { 1020d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes public: 1030d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes FdOutputStream(int fd) : total(0), fd_(fd) { 1041e980b6bc8315d00a07312b25486531247abd98cElliott Hughes } 1055c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1060d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes void Send(const char* data, int len) { 1070d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (len < 0) { 1080d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes len = strlen(data); 1090d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 1108f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 1110d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes while (len > 0) { 1120d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int rc = TEMP_FAILURE_RETRY(write(fd_, data, len)); 1130d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (rc == -1) { 1140d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes break; 1150d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 1160d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes data += rc; 1170d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes len -= rc; 1180d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes total += rc; 1195c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 1201e980b6bc8315d00a07312b25486531247abd98cElliott Hughes } 1215c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1220d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int total; 1235c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1240d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes private: 1250d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int fd_; 1260d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes}; 1275c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1285c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner/*** formatted output implementation 1295c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner ***/ 1305c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1315c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner/* Parse a decimal string from 'format + *ppos', 1325c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * return the value, and writes the new position past 1335c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * the decimal string in '*ppos' on exit. 1345c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * 1355c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * NOTE: Does *not* handle a sign prefix. 1365c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner */ 1370d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstatic unsigned parse_decimal(const char *format, int *ppos) { 1385c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner const char* p = format + *ppos; 1395c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner unsigned result = 0; 1405c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1415c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner for (;;) { 1425c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner int ch = *p; 1430336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn unsigned d = static_cast<unsigned>(ch - '0'); 1445c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1450d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (d >= 10U) { 1465c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 1470d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 1485c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 1495c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner result = result*10 + d; 1505c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner p++; 1515c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 1525c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner *ppos = p - format; 1535c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner return result; 1545c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner} 1555c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 156eababde2141c7128155200b213e45291cd876e46Elliott Hughes// Writes number 'value' in base 'base' into buffer 'buf' of size 'buf_size' bytes. 157eababde2141c7128155200b213e45291cd876e46Elliott Hughes// Assumes that buf_size > 0. 15841b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughesstatic void format_unsigned(char* buf, size_t buf_size, uint64_t value, int base, bool caps) { 159eababde2141c7128155200b213e45291cd876e46Elliott Hughes char* p = buf; 160eababde2141c7128155200b213e45291cd876e46Elliott Hughes char* end = buf + buf_size - 1; 161eababde2141c7128155200b213e45291cd876e46Elliott Hughes 162eababde2141c7128155200b213e45291cd876e46Elliott Hughes // Generate digit string in reverse order. 163eababde2141c7128155200b213e45291cd876e46Elliott Hughes while (value) { 164eababde2141c7128155200b213e45291cd876e46Elliott Hughes unsigned d = value % base; 165eababde2141c7128155200b213e45291cd876e46Elliott Hughes value /= base; 166eababde2141c7128155200b213e45291cd876e46Elliott Hughes if (p != end) { 167eababde2141c7128155200b213e45291cd876e46Elliott Hughes char ch; 168eababde2141c7128155200b213e45291cd876e46Elliott Hughes if (d < 10) { 169eababde2141c7128155200b213e45291cd876e46Elliott Hughes ch = '0' + d; 170eababde2141c7128155200b213e45291cd876e46Elliott Hughes } else { 171eababde2141c7128155200b213e45291cd876e46Elliott Hughes ch = (caps ? 'A' : 'a') + (d - 10); 172eababde2141c7128155200b213e45291cd876e46Elliott Hughes } 173eababde2141c7128155200b213e45291cd876e46Elliott Hughes *p++ = ch; 1745c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 175eababde2141c7128155200b213e45291cd876e46Elliott Hughes } 1765c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 177eababde2141c7128155200b213e45291cd876e46Elliott Hughes // Special case for 0. 178eababde2141c7128155200b213e45291cd876e46Elliott Hughes if (p == buf) { 179eababde2141c7128155200b213e45291cd876e46Elliott Hughes if (p != end) { 180eababde2141c7128155200b213e45291cd876e46Elliott Hughes *p++ = '0'; 1815c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 182eababde2141c7128155200b213e45291cd876e46Elliott Hughes } 183eababde2141c7128155200b213e45291cd876e46Elliott Hughes *p = '\0'; 184eababde2141c7128155200b213e45291cd876e46Elliott Hughes 185eababde2141c7128155200b213e45291cd876e46Elliott Hughes // Reverse digit string in-place. 186eababde2141c7128155200b213e45291cd876e46Elliott Hughes size_t length = p - buf; 187eababde2141c7128155200b213e45291cd876e46Elliott Hughes for (size_t i = 0, j = length - 1; i < j; ++i, --j) { 188eababde2141c7128155200b213e45291cd876e46Elliott Hughes char ch = buf[i]; 189eababde2141c7128155200b213e45291cd876e46Elliott Hughes buf[i] = buf[j]; 190eababde2141c7128155200b213e45291cd876e46Elliott Hughes buf[j] = ch; 191eababde2141c7128155200b213e45291cd876e46Elliott Hughes } 1925c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner} 1935c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 19441b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughesstatic void format_integer(char* buf, size_t buf_size, uint64_t value, char conversion) { 19541b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes // Decode the conversion specifier. 19641b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes int is_signed = (conversion == 'd' || conversion == 'i' || conversion == 'o'); 19741b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes int base = 10; 19841b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes if (conversion == 'x' || conversion == 'X') { 19941b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes base = 16; 20041b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes } else if (conversion == 'o') { 20141b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes base = 8; 20241b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes } 20341b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes bool caps = (conversion == 'X'); 2045c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 20541b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes if (is_signed && static_cast<int64_t>(value) < 0) { 20641b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes buf[0] = '-'; 20741b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes buf += 1; 20841b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes buf_size -= 1; 20941b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes value = static_cast<uint64_t>(-static_cast<int64_t>(value)); 21041b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes } 21141b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes format_unsigned(buf, buf_size, value, base, caps); 2125c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner} 2135c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2140d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughestemplate <typename Out> 2150d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstatic void SendRepeat(Out& o, char ch, int count) { 2160d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char pad[8]; 2170d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes memset(pad, ch, sizeof(pad)); 2180d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 2190d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes const int pad_size = static_cast<int>(sizeof(pad)); 2200d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes while (count > 0) { 2210d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int avail = count; 2220d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (avail > pad_size) { 2230d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes avail = pad_size; 2240d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 2250d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes o.Send(pad, avail); 2260d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes count -= avail; 2270d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 2280d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 2290d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 2305c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner/* Perform formatted output to an output target 'o' */ 2310d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughestemplate <typename Out> 2320d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstatic void out_vformat(Out& o, const char* format, va_list args) { 233ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int nn = 0; 2345c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2355c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner for (;;) { 236ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int mm; 237ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int padZero = 0; 238ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int padLeft = 0; 239ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden char sign = '\0'; 240ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int width = -1; 241ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int prec = -1; 242ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden size_t bytelen = sizeof(int); 243ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden int slen; 244ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden char buffer[32]; /* temporary buffer used to format numbers */ 245ec92af8fe5d28c74f3505932135b1b8f3fbaad00Andy McFadden 2465c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner char c; 2475c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2485c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* first, find all characters that are not 0 or '%' */ 2495c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* then send them to the output directly */ 2505c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner mm = nn; 2515c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner do { 2525c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[mm]; 2535c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (c == '\0' || c == '%') 2545c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 2555c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner mm++; 2565c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } while (1); 2575c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2585c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (mm > nn) { 2590d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes o.Send(format+nn, mm-nn); 2605c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner nn = mm; 2615c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2625c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2635c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* is this it ? then exit */ 2645c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (c == '\0') 2655c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 2665c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2675c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* nope, we are at a '%' modifier */ 2685c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner nn++; // skip it 2695c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2705c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* parse flags */ 2715c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner for (;;) { 2725c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 2735c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (c == '\0') { /* single trailing '%' ? */ 2745c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = '%'; 2750d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes o.Send(&c, 1); 2765c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner return; 2775c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2785c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner else if (c == '0') { 2795c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner padZero = 1; 2805c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner continue; 2815c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2825c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner else if (c == '-') { 2835c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner padLeft = 1; 2845c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner continue; 2855c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2865c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner else if (c == ' ' || c == '+') { 2875c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner sign = c; 2885c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner continue; 2895c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2905c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 2915c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2925c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 2935c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* parse field width */ 2945c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if ((c >= '0' && c <= '9')) { 2955c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner nn --; 2960336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn width = static_cast<int>(parse_decimal(format, &nn)); 2975c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 2985c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 2995c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3005c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* parse precision */ 3015c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (c == '.') { 3020336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn prec = static_cast<int>(parse_decimal(format, &nn)); 3035c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3045c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3055c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3065c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* length modifier */ 3075c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner switch (c) { 3085c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 'h': 3095c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(short); 3105c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (format[nn] == 'h') { 3115c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(char); 3125c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner nn += 1; 3135c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3145c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3155c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 3165c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 'l': 3175c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(long); 3185c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (format[nn] == 'l') { 3195c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(long long); 3205c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner nn += 1; 3215c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3225c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3235c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 3245c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 'z': 3255c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(size_t); 3265c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3275c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 3285c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 't': 3295c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner bytelen = sizeof(ptrdiff_t); 3305c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner c = format[nn++]; 3315c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner break; 3325c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner default: 3335c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner ; 3345c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3355c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3365c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* conversion specifier */ 33741b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes const char* str = buffer; 3385c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (c == 's') { 3395c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* string */ 3405c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner str = va_arg(args, const char*); 341239e7a0756fddf3698bf72cab10d7f382421090bElliott Hughes if (str == NULL) { 342239e7a0756fddf3698bf72cab10d7f382421090bElliott Hughes str = "(null)"; 343239e7a0756fddf3698bf72cab10d7f382421090bElliott Hughes } 3445c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } else if (c == 'c') { 3455c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* character */ 3465c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* NOTE: char is promoted to int when passed through the stack */ 3470336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn buffer[0] = static_cast<char>(va_arg(args, int)); 3485c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner buffer[1] = '\0'; 3495c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } else if (c == 'p') { 3500336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn uint64_t value = reinterpret_cast<uintptr_t>(va_arg(args, void*)); 3515c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner buffer[0] = '0'; 3525c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner buffer[1] = 'x'; 35341b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes format_integer(buffer + 2, sizeof(buffer) - 2, value, 'x'); 354885f3b9cad01b8158aadc55c159c17dbf34f622cChristopher Ferris } else if (c == 'd' || c == 'i' || c == 'o' || c == 'u' || c == 'x' || c == 'X') { 3555c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* integers - first read value from stack */ 3565c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner uint64_t value; 35741b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes int is_signed = (c == 'd' || c == 'i' || c == 'o'); 3585c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3595c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* NOTE: int8_t and int16_t are promoted to int when passed 3605c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * through the stack 3615c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner */ 3625c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner switch (bytelen) { 3630336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn case 1: value = static_cast<uint8_t>(va_arg(args, int)); break; 3640336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn case 2: value = static_cast<uint16_t>(va_arg(args, int)); break; 3655c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 4: value = va_arg(args, uint32_t); break; 3665c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner case 8: value = va_arg(args, uint64_t); break; 3675c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner default: return; /* should not happen */ 3685c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3695c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3705c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* sign extension, if needed */ 37141b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes if (is_signed) { 3725c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner int shift = 64 - 8*bytelen; 3730336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn value = static_cast<uint64_t>((static_cast<int64_t>(value << shift)) >> shift); 3745c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3755c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3765c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* format the number properly into our buffer */ 37741b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes format_integer(buffer, sizeof(buffer), value, c); 37841b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes } else if (c == '%') { 37941b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes buffer[0] = '%'; 38041b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes buffer[1] = '\0'; 38141b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes } else { 38241b3179c9ef03ebb447cac7f5e8405dce399cb17Elliott Hughes __assert(__FILE__, __LINE__, "conversion specifier unsupported"); 3835c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3845c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3855c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner /* if we are here, 'str' points to the content that must be 3865c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner * outputted. handle padding and alignment now */ 3875c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3885c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner slen = strlen(str); 3895c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 39018a206c81d9743481e364384affd43306911283dElliott Hughes if (sign != '\0' || prec != -1) { 39118a206c81d9743481e364384affd43306911283dElliott Hughes __assert(__FILE__, __LINE__, "sign/precision unsupported"); 39218a206c81d9743481e364384affd43306911283dElliott Hughes } 39318a206c81d9743481e364384affd43306911283dElliott Hughes 3945c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (slen < width && !padLeft) { 3955c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner char padChar = padZero ? '0' : ' '; 3960d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes SendRepeat(o, padChar, width - slen); 3975c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 3985c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 3990d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes o.Send(str, slen); 4005c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner 4015c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner if (slen < width && padLeft) { 4025c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner char padChar = padZero ? '0' : ' '; 4030d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes SendRepeat(o, padChar, width - slen); 4045c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 4055c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner } 4065c734644eebf8d01be1e86cbe20a111a5c5a2738David 'Digit' Turner} 4078f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 4080d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesint __libc_format_buffer(char* buffer, size_t buffer_size, const char* format, ...) { 4090d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes BufferOutputStream os(buffer, buffer_size); 4100d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_list args; 4110d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_start(args, format); 4120d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes out_vformat(os, format, args); 4130d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_end(args); 4140d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes return os.total; 4150d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 4160d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 4170d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesint __libc_format_fd(int fd, const char* format, ...) { 4180d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes FdOutputStream os(fd); 4190d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_list args; 4200d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_start(args, format); 4210d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes out_vformat(os, format, args); 4220d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_end(args); 4230d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes return os.total; 4240d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 4250d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 4260f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughesstatic int __libc_write_stderr(const char* tag, const char* msg) { 4270f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes int fd = TEMP_FAILURE_RETRY(open("/dev/stderr", O_CLOEXEC | O_WRONLY)); 4280f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes if (fd == -1) { 4290f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes return -1; 4300f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes } 4310f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes 4320f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes iovec vec[4]; 4330f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[0].iov_base = const_cast<char*>(tag); 4340f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[0].iov_len = strlen(tag); 4350f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[1].iov_base = const_cast<char*>(": "); 4360f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[1].iov_len = 2; 4370f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[2].iov_base = const_cast<char*>(msg); 4380f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[2].iov_len = strlen(msg) + 1; 4390f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[3].iov_base = const_cast<char*>("\n"); 4400f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes vec[3].iov_len = 1; 4410f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes 4420f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes int result = TEMP_FAILURE_RETRY(writev(fd, vec, 4)); 4430f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes close(fd); 4440f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes return result; 4450f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes} 4460f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes 4470336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#ifdef TARGET_USES_LOGD 4480336e35368aa161f1fed04ccde39553db4740b97Mark Salyzynstatic int __libc_open_log_socket() 4490336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn{ 4500336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // ToDo: Ideally we want this to fail if the gid of the current 4510336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // process is AID_LOGD, but will have to wait until we have 4520336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // registered this in private/android_filesystem_config.h. We have 4530336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // found that all logd crashes thus far have had no problem stuffing 4540336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // the UNIX domain socket and moving on so not critical *today*. 4550336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 456bae5b1dbd8dfe7318e208be917f4c9b9e8abced6Nick Kralevich int log_fd = TEMP_FAILURE_RETRY(socket(PF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0)); 4570336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn if (log_fd < 0) { 4580336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn return -1; 4590336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn } 4600336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4610336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn if (fcntl(log_fd, F_SETFL, O_NONBLOCK) == -1) { 4620336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn close(log_fd); 4630336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn return -1; 4640336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn } 4650336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4660336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn union { 4670336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn struct sockaddr addr; 4680336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn struct sockaddr_un addrUn; 4690336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn } u; 4700336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn memset(&u, 0, sizeof(u)); 4710336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn u.addrUn.sun_family = AF_UNIX; 4720336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn strlcpy(u.addrUn.sun_path, "/dev/socket/logdw", sizeof(u.addrUn.sun_path)); 4730336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4740336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn if (TEMP_FAILURE_RETRY(connect(log_fd, &u.addr, sizeof(u.addrUn))) != 0) { 4750336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn close(log_fd); 4760336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn return -1; 4770336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn } 4780336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4790336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn return log_fd; 4800336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn} 4819fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn 4829fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzynstruct log_time { // Wire format 4839fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn uint32_t tv_sec; 4849fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn uint32_t tv_nsec; 4859fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn}; 4860336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#endif 4870336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4880d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesstatic int __libc_write_log(int priority, const char* tag, const char* msg) { 4890336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#ifdef TARGET_USES_LOGD 4900336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn int main_log_fd = __libc_open_log_socket(); 4910336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4920336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn if (main_log_fd == -1) { 4930336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn // Try stderr instead. 4940336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn return __libc_write_stderr(tag, msg); 4950336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn } 4960336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 4978664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn iovec vec[6]; 498011101905d91b770893e8a2fb6c09552d1c63652Elliott Hughes char log_id = (priority == ANDROID_LOG_FATAL) ? LOG_ID_CRASH : LOG_ID_MAIN; 4990336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn vec[0].iov_base = &log_id; 5000336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn vec[0].iov_len = sizeof(log_id); 5018664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn uint16_t tid = gettid(); 5028664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[1].iov_base = &tid; 5038664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[1].iov_len = sizeof(tid); 5049fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn timespec ts; 5059fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn clock_gettime(CLOCK_REALTIME, &ts); 5069fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn log_time realtime_ts; 5079fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn realtime_ts.tv_sec = ts.tv_sec; 5089fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn realtime_ts.tv_nsec = ts.tv_nsec; 5098664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[2].iov_base = &realtime_ts; 5108664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[2].iov_len = sizeof(realtime_ts); 5118664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn 5128664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[3].iov_base = &priority; 5138664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[3].iov_len = 1; 5148664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[4].iov_base = const_cast<char*>(tag); 5158664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[4].iov_len = strlen(tag) + 1; 5168664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[5].iov_base = const_cast<char*>(msg); 5178664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[5].iov_len = strlen(msg) + 1; 5180336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#else 51917fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich int main_log_fd = TEMP_FAILURE_RETRY(open("/dev/log/main", O_CLOEXEC | O_WRONLY)); 5200d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (main_log_fd == -1) { 5210f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes if (errno == ENOTDIR) { 5220f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes // /dev/log isn't a directory? Maybe we're running on the host? Try stderr instead. 5230f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes return __libc_write_stderr(tag, msg); 5240f395b7ba056ccec3915737cfece81ca2161e980Elliott Hughes } 52517fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich return -1; 5260d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 5270d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 5280d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes iovec vec[3]; 5290d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes vec[0].iov_base = &priority; 5300d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes vec[0].iov_len = 1; 5310d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes vec[1].iov_base = const_cast<char*>(tag); 5320d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes vec[1].iov_len = strlen(tag) + 1; 5330d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes vec[2].iov_base = const_cast<char*>(msg); 5340d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes vec[2].iov_len = strlen(msg) + 1; 5350336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#endif 5360d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 5370336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn int result = TEMP_FAILURE_RETRY(writev(main_log_fd, vec, sizeof(vec) / sizeof(vec[0]))); 53817fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich close(main_log_fd); 53917fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich return result; 5400d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 5410d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 5420d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesint __libc_format_log_va_list(int priority, const char* tag, const char* format, va_list args) { 5430d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char buffer[1024]; 5440d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes BufferOutputStream os(buffer, sizeof(buffer)); 5450d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes out_vformat(os, format, args); 5460d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes return __libc_write_log(priority, tag, buffer); 5470d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 5480d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 5490d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughesint __libc_format_log(int priority, const char* tag, const char* format, ...) { 5500d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_list args; 5510d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_start(args, format); 5520d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes int result = __libc_format_log_va_list(priority, tag, format, args); 5530d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes va_end(args); 5540d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes return result; 5550d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 5568f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 5578f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughesstatic int __libc_android_log_event(int32_t tag, char type, const void* payload, size_t len) { 5580336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#ifdef TARGET_USES_LOGD 5598664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn iovec vec[6]; 5600336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn char log_id = LOG_ID_EVENTS; 5610336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn vec[0].iov_base = &log_id; 5620336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn vec[0].iov_len = sizeof(log_id); 5638664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn uint16_t tid = gettid(); 5648664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[1].iov_base = &tid; 5658664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[1].iov_len = sizeof(tid); 5669fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn timespec ts; 5679fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn clock_gettime(CLOCK_REALTIME, &ts); 5689fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn log_time realtime_ts; 5699fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn realtime_ts.tv_sec = ts.tv_sec; 5709fc76027f3e1e02193f3dd98063c55918e1b4066Mark Salyzyn realtime_ts.tv_nsec = ts.tv_nsec; 5718664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[2].iov_base = &realtime_ts; 5728664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[2].iov_len = sizeof(realtime_ts); 5738664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn 5748664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[3].iov_base = &tag; 5758664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[3].iov_len = sizeof(tag); 5768664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[4].iov_base = &type; 5778664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[4].iov_len = sizeof(type); 5788664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[5].iov_base = const_cast<void*>(payload); 5798664be583a4556e5ca132288e989d307d2df92ceMark Salyzyn vec[5].iov_len = len; 5800336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 5810336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn int event_log_fd = __libc_open_log_socket(); 5820336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#else 5830d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes iovec vec[3]; 5848f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[0].iov_base = &tag; 5858f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[0].iov_len = sizeof(tag); 5868f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[1].iov_base = &type; 5878f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[1].iov_len = sizeof(type); 5888f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[2].iov_base = const_cast<void*>(payload); 5898f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes vec[2].iov_len = len; 5908f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 59117fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich int event_log_fd = TEMP_FAILURE_RETRY(open("/dev/log/events", O_CLOEXEC | O_WRONLY)); 5920336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn#endif 5930336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn 5948f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes if (event_log_fd == -1) { 59517fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich return -1; 5968f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes } 5970336e35368aa161f1fed04ccde39553db4740b97Mark Salyzyn int result = TEMP_FAILURE_RETRY(writev(event_log_fd, vec, sizeof(vec) / sizeof(vec[0]))); 59817fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich close(event_log_fd); 59917fc25d20f4d61f7fc3dfb3de095719ada89e38bNick Kralevich return result; 6008f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes} 6018f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 6028f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughesvoid __libc_android_log_event_int(int32_t tag, int value) { 6038f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes __libc_android_log_event(tag, EVENT_TYPE_INT, &value, sizeof(value)); 6048f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes} 6058f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 6068f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughesvoid __libc_android_log_event_uid(int32_t tag) { 6078f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes __libc_android_log_event_int(tag, getuid()); 6088f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes} 6098f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes 610d1eda33f012e46083b91e087fb79d14a5ce70f0eElliott Hughesvoid __fortify_chk_fail(const char* msg, uint32_t tag) { 6118f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes if (tag != 0) { 6128f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes __libc_android_log_event_uid(tag); 6138f2a5a0b40fc82126c691d5c30131d908772aab7Elliott Hughes } 6140d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes __libc_fatal("FORTIFY_SOURCE: %s. Calling abort().", msg); 6150d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 6160d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 617c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughesstatic void __libc_fatal(const char* format, va_list args) { 6180d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes char msg[1024]; 6190d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes BufferOutputStream os(msg, sizeof(msg)); 6200d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes out_vformat(os, format, args); 6210d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 62212bf3bcdeeaa0dcdc7a4f4e4d11bc2fc3bf6bd7aDmitriy Ivanov // log to stderr for the benefit of "adb shell" users. 62397e31dedf056b07bcfcd46c49b60bf0798c60843Dan Albert struct iovec iov[2] = { 62497e31dedf056b07bcfcd46c49b60bf0798c60843Dan Albert {msg, strlen(msg)}, 62597e31dedf056b07bcfcd46c49b60bf0798c60843Dan Albert {const_cast<void*>(static_cast<const void*>("\n")), 1}, 62697e31dedf056b07bcfcd46c49b60bf0798c60843Dan Albert }; 62797e31dedf056b07bcfcd46c49b60bf0798c60843Dan Albert writev(2, iov, 2); 6280d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 6290d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes // Log to the log for the benefit of regular app developers (whose stdout and stderr are closed). 630c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes __libc_write_log(ANDROID_LOG_FATAL, "libc", msg); 6310d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 632c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes __android_set_abort_message(msg); 63361e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes} 63461e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes 63561e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughesvoid __libc_fatal_no_abort(const char* format, ...) { 63661e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes va_list args; 63761e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes va_start(args, format); 638c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes __libc_fatal(format, args); 63961e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes va_end(args); 64061e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes} 6410d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 64261e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughesvoid __libc_fatal(const char* format, ...) { 64361e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes va_list args; 64461e699a133a4807fe878a6cb0d7190d7c96e21f8Elliott Hughes va_start(args, format); 645c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes __libc_fatal(format, args); 6462e3b7108b5b3d3f3a4a0fb369016e854bcf92212Elliott Hughes va_end(args); 6472e3b7108b5b3d3f3a4a0fb369016e854bcf92212Elliott Hughes abort(); 6482e3b7108b5b3d3f3a4a0fb369016e854bcf92212Elliott Hughes} 6492e3b7108b5b3d3f3a4a0fb369016e854bcf92212Elliott Hughes 650c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughesvoid __android_set_abort_message(const char* msg) { 6511728b2396591853345507a063ed6075dfd251706Elliott Hughes ScopedPthreadMutexLocker locker(&g_abort_msg_lock); 652c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes 653c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes if (__abort_message_ptr == NULL) { 654c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes // We must have crashed _very_ early. 655c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes return; 656c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes } 657c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes 658c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes if (*__abort_message_ptr != NULL) { 659c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes // We already have an abort message. 660c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes // Assume that the first crash is the one most worth reporting. 661c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes return; 662c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes } 6630d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 6640d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes size_t size = sizeof(abort_msg_t) + strlen(msg) + 1; 6650d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes void* map = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); 6660d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes if (map == MAP_FAILED) { 6670d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes return; 6680d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 6690d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes 670c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes // TODO: if we stick to the current "one-shot" scheme, we can remove this code and 671c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes // stop storing the size. 672c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes if (*__abort_message_ptr != NULL) { 673c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes munmap(*__abort_message_ptr, (*__abort_message_ptr)->size); 6740d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes } 675c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes abort_msg_t* new_abort_message = reinterpret_cast<abort_msg_t*>(map); 676c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes new_abort_message->size = size; 677c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes strcpy(new_abort_message->msg, msg); 678c78368f04faa4ee17f546985809e7550f3f88636Elliott Hughes *__abort_message_ptr = new_abort_message; 6790d787c1fa18c6a1f29ef9840e28a68cf077be1deElliott Hughes} 680