CHANGES.TXT revision 50ace4fec5e8cb5afcbc656a4556fa528adfd760
1Bionic ChangeLog: 2----------------- 3 4Differences between current and Android 2.2: 5 6- <pthread.h>: Add reader/writer locks implementation. 7 8- <semaphore.h>: Use private futexes for semaphore implementation, 9 unless your set 'pshared' to non-0 when calling sem_init(). 10 11- <math.h>: Added sincos(), sincosf() and sincosl() (GLibc compatibility). 12 13- <sys/sysinfo.h>: Added missing sysinfo() system call implementation 14 (the function was already declared in the header though). 15 16- sysconf() didn't work for some arguments due to a small bug in the 17 /proc line parser. 18 19- <termio.h>: added missing header (just includes <termios.h>) 20 21- <unistd.h>: add missing declaration for truncate(). The implementation 22 was already here since Android 1.5. 23 24- <wchar.h>: small fixes to really support wchar_t in Bionic (not there yet). 25 26 the size of wchar_t is still 32-bit (decided by the compiler) 27 28 WCHAR_MIN: changed from 0 to INT_MIN 29 WCHAR_MAX: changed from 255 to INT_MAX 30 31 wcpcpy(), wcpncpy(), wcscat(), wcschr(), wcscmp(), 32 wcscpy(), wcscspn(), wcsdup(), wcslcat(), wcslcpy(), 33 wcslen(), wcsncat(), wcsncmp(), wcsncpy(), wcsnlen(), 34 wcspbrk(), wcsrchr(), wcsrchr(), wcsspn(), wcsstr(), 35 wcstok(), wcswidth(), wmemchr(), wmemcmp(), wmemcpy(), 36 wmemmove(), wmemset(): Added proper implementations. 37 38 wcscasecmp(), wcsncasecmp(): Added implementation limited 39 to ASCII codes for lower/upper. 40 41 wcscoll(): added dummy implementation that calls wcscmp() 42 wcsxfrm(): added dummy implementation that calls wcsncpy() 43 44 NOTE: Technically, this breaks the ABI, but we never claimed to support 45 wchar_t anyway. The wchar_t support is still *NOT* official at this 46 point. We need better multi-byte support code, and wprintf/wscanf 47 stuff too. 48 49- <inttypes.h>: add missing declarations for strntoimax abd strntoumax. 50 51- <stdlib.h>: add missing declarations for drand48() and erand48(). 52 53- clearerr(): fix broken implementation. 54 55- Feature test macros like _POSIX_C_SOURCE / _XOPEN_SOURCE / _C99_SOURCE 56 are now handled correctly by our C library headers (see <sys/cdefs.h>) 57 58- <sys/select.h>: add missing declaration for pselect() 59 60- 61 62------------------------------------------------------------------------------- 63Differences between Android 2.2. and Android 2.1: 64 65- Support FP register save/load in setjmp()/longjmp() on ARMv7 builds. 66 67- Add support for SH-4 CPU architecture ! 68 69- __atomic_swap(): use LDREX/STREX CPU instructions on ARMv6 and higher. 70 71- <arpa/telnet.h>: New header (declarations only, no implementation). 72 73- <err.h>: New header + implementation. GLibc compatibility. 74 75- <warn.h>: New header + implementation. GLibc compatibility. 76 77- <fts.h>: New header + implementation. 78 79- <mntent.h>: Add missing <stdio.h> include. 80 81- <regex.h>: New header + implementation. 82 83- <signal.h>: Added killpg() 84 85- <stdint.h>: Allow 64-bit type declarations on C99 builds. 86 87- <stdio.h>: Add fdprintf() and vfdprintf(). Note that GLibc provides 88 the confusing 'dprintf' and 'vdprintf()' functions instead. 89 90- <stdlib.h>: Fix ptsname_r(): the return type is int instead of char*. 91 The mistake comes from a GLibc man page bug (the man page listed a return 92 type of char*, while the implementation used int. Fixed in late 2009 only). 93 The Bionic implementation was incorrect. Technically, this is an ABI 94 breakage, but code that used this function probably never worked or 95 compiled properly anyway. 96 97- <strings.h>: Add missing <sys/types.h> include. 98 99- <sys/queue.h>: Added new header (no implementation - macro templates). 100 101- <sys/resource.h>: Add rlim_t proper definition. 102 103- <time64.h>: Add missing C++ header inclusion guards. 104 105- <unistd.h>: Add getusershell(), setusershell() and endusershell(), though 106 implementation are bogus. GLibc compatibility. 107 108- <wchar.h>: Add mbstowcs() and wcstombs() 109 110- add clone() implementation for ARM (x86 and SH-4 not working yet). 111 112- <sys/epoll.h>: <sys/system_properties.h>: Add missing C++ inclusion guards 113 114- fix getpwnam() and getpwgrp() to accept "app_0" as a valid user name. 115 116- fix sem_trywait() to return -1 and set errno to EAGAIN, instead of 117 returning EAGAIN directly. 118 119- fix sem_post() to wake up multiple threads when called rapidly in 120 succession. 121 122- DNS: partial implementation of RFC3484 (rule 1, 2, 5, 6, 8, 10 and 123 modified rule 9), for better address selection/sorting. 124 In the process, removed code that was previously used for "sortlist" 125 in /etc/resolv.conf. (resolv.conf is already ignored, so the latter 126 is a no-op for actual functionality.) 127 128- fix pthread_sigmask() to properly return an error code without touching 129 errno. Previous implementation returned -1 on error, setting errno, which 130 is not Posix compliant. 131 132- add sigaltstack() implementation for ARM. 133 134- <time.h>: Properly implement the 'timezone' and 'daylight' global variables 135 (they were not defined previously, though declared in the header). 136 137- <time.h>: Fix timezone management implementation to properly update 138 'tm_gmtoff' field in 'struct tm' structure. 139 140- DNS: get rid of spurious random DNS queries when trying to resolve 141 an unknown domain name. Due to an initialization bug, a random DNS search 142 list was generated for each thread if net.dns.search is not defined. 143 144- <pthread.h>: Add pthread_condattr_init/destroy/setpshared/getpshared functions 145 to enable proper shared conditional variable initialization. 146 147 Modify the pthread_mutex_t and pthread_cond_t implementation to use private 148 futexes for performance reasons. Mutexes and Condvars are no longer shareable 149 between processes by default anymore, unless you use PTHREAD_PROCESS_SHARED 150 with pthread_mutexattr_setpshared() and/or pthread_condattr_setpshared(). 151 152------------------------------------------------------------------------------- 153Differences between Android 2.1 and 2.0.1: 154 155- zoneinfo: updated data tables to version 2009s 156 157 158------------------------------------------------------------------------------- 159Differences between Android 2.0.1 and 2.0: 160 161- abort(): ARM-specific hack to preserve the 'lr' register when abort() 162 is called (GCC does not preserve it by default since it thinks that 163 abort() never returns). This improves stack traces considerably. 164 165 166------------------------------------------------------------------------------- 167Differences between Android 2.0 and 1.6: 168 169- memcmp(), memcpy(): ARMv7 optimized versions. 170 171- pthread_mutexattr_setpshared(): implementation will not return ENOTSUP 172 if PTHREAD_PROCESS_SHARED is used, because our Mutex implementation can 173 work across multiple processes. 174 175 *HOWEVER* it does not use "robust futexes" which means that held mutexes 176 *are not* automatically released by the kernel when the owner process 177 crashes or exits. This is only done to simplify communication between 178 two always-live system processes, DO NOT USE THIS IN APPLICATIONS ! 179 180- pthread_mutex_lock_timeout_np(): New Android-specific function to 181 perform a timed lock (). In case of timeout, it returns EBUSY. 182 183- pthread_cond_timedwait_monotonic_np(): Same as pthread_cond_timedwait() 184 but uses the monotonic clock(). Android-specific. 185 186- pthread_cond_timedwait_relative_np(): Same as pthread_cond_timedwait() 187 but uses a relative timeout instead. Android-specific. 188 189- <netinet/in.h>: Now includes <netinet/in6.h>. 190 191- <netinet/in6.h>: Added IPV6_JOIN_GROUP, IPV6_LEAVE_GROUP, IN6ADDR_ANY_INIT 192 and ipv6mr_interface definitions. 193 194- <time.h>: 195 * Add missing tzset() declaration. 196 * Add Android-specific strftime_tz(). 197 198- getaddrinfo(): 199 Only perform IPv6 lookup for AF_UNSPEC if we have IPv6 connectivity. 200 This saves one DNS query per lookup on non-IPv6 systems. 201 202- mktime(): Fix an infinite loop problen that appeared when switching to 203 GCC 4.4.0. 204 205- strftime(): fix incorrect handling of dates > 2038 due to 64-bit issue 206 in original code. 207 208------------------------------------------------------------------------------- 209Differences between Android 1.6 and 1.5: 210 211- C runtime: Fix runtime initialization to be called before any static C++ 212 constructors. This allows these to use pthread functions properly. 213 214- __aeabi_atexit(): Fix implementation to properly call C++ static destructors 215 when the program exits (or when a shared library is unloaded). 216 217- <sys/stat.h>: added GLibc compatibility macros definitions: 218 219 #define st_atimensec st_atime_nsec 220 #define st_mtimensec st_mtime_nsec 221 #define st_ctimensec st_ctime_nsec 222 223- getaddrinfo(): implementation will now allow numeric ports if ai_socktype is 224 set to ANY. This is to match the GLibc behaviour. 225 226- getservent(): and getservent_r() incorrectly returned the port in host-endian 227 order in the s_port field. It now returns it in big-endian order. 228 229- DNS: Allow underscore in the middle of DNS labels. While not really 230 standard, this extension is needed for some VPN configurations and is 231 supported by other operating systems. 232 233- DNS: Support for DNS domain search lists through the new net.dns.search 234 system property. The corresponding value must be a space-separated list of 235 domain suffixes. 236