1 Bionic ChangeLog: 2 ----------------- 3 4 Differences between current and Android 2.3: 5 6 - <android/api-level.h>: Added new header to define __ANDROID_API__ to 7 a constant integer corresponding to the native API level. This header 8 also exists in the NDK's platform headers. 9 10 - <sys/cdefs.h>: Include <android/api-level.h> 11 12 - <time.h>: Add timegm(), timelocal(), time2posix() and posix2time() 13 14 - <sched.h>: Add sched_getcpu(), sched_getaffinity(), sched_setaffinity(), 15 cpu_set_t and related macros (e.g. CPU_SETSIZE, CPU_ZERO, CPU_SET, ...) 16 17 - <unistd.h>: Add ftruncate64(). 18 19 - <signal.h>: Changed the definition of SIGRTMAX to 64. However, note that 20 sigset_t is only 32-bit and cannot deal with real-time signals. 21 22 ------------------------------------------------------------------------------- 23 Differences between Android 2.3 and Android 2.2: 24 25 - <pthread.h>: Add reader/writer locks implementation. Add sanity 26 checking to pthread_mutex_destroy() (e.g. a locked mutex will return 27 EBUSY). 28 29 - <semaphore.h>: Use private futexes for semaphore implementation, 30 unless your set 'pshared' to non-0 when calling sem_init(). 31 32 Also fixed a bug in sem_post() to make it wake up all waiting 33 threads, instead of one. As a consequence, the maximum semaphore 34 value is now reduced to 0x3fffffff. 35 36 - <math.h>: Added sincos(), sincosf() and sincosl() (GLibc compatibility). 37 38 - <sys/sysinfo.h>: Added missing sysinfo() system call implementation 39 (the function was already declared in the header though). 40 41 - sysconf() didn't work for some arguments due to a small bug in the 42 /proc line parser. 43 44 - <termio.h>: added missing header (just includes <termios.h>) 45 46 - <unistd.h>: add missing declaration for truncate(). The implementation 47 was already here since Android 1.5. 48 49 modify implementation of alarm() to return 0 in case of error (i.e. 50 if a value larger than 0x7fffffff seconds is passed to it). This 51 makes the implementation compliant with the GLibc behaviour. 52 53 - <wchar.h>: small fixes to really support wchar_t in Bionic (not there yet). 54 55 the size of wchar_t is still 32-bit (decided by the compiler) 56 57 WCHAR_MIN: changed from 0 to INT_MIN 58 WCHAR_MAX: changed from 255 to INT_MAX 59 60 wcpcpy(), wcpncpy(), wcscat(), wcschr(), wcscmp(), 61 wcscpy(), wcscspn(), wcsdup(), wcslcat(), wcslcpy(), 62 wcslen(), wcsncat(), wcsncmp(), wcsncpy(), wcsnlen(), 63 wcspbrk(), wcsrchr(), wcsrchr(), wcsspn(), wcsstr(), 64 wcstok(), wcswidth(), wmemchr(), wmemcmp(), wmemcpy(), 65 wmemmove(), wmemset(): Added proper implementations. 66 67 wcscasecmp(), wcsncasecmp(): Added implementation limited 68 to ASCII codes for lower/upper. 69 70 wcscoll(): added dummy implementation that calls wcscmp() 71 wcsxfrm(): added dummy implementation that calls wcsncpy() 72 73 NOTE: Technically, this breaks the ABI, but we never claimed to support 74 wchar_t anyway. The wchar_t support is still *NOT* official at this 75 point. We need better multi-byte support code, and wprintf/wscanf 76 stuff too. 77 78 - <inttypes.h>: add missing declarations for strntoimax abd strntoumax. 79 80 - <stdlib.h>: add missing declarations for drand48() and erand48(). 81 82 - clearerr(): fix broken implementation. 83 84 - Feature test macros like _POSIX_C_SOURCE / _XOPEN_SOURCE / _C99_SOURCE 85 are now handled correctly by our C library headers (see <sys/cdefs.h>) 86 87 - <sys/select.h>: add missing declaration for pselect() 88 89 - <sys/vfs.h>: fixed implementation of fstatfs() (also fixes fpathconf() 90 which uses it). 91 92 - Added an implementation of pthread_atfork() 93 94 - <dlfcn.h>: fixed dlopen() implementation to support dlopen(NULL, ...). 95 This allows one to look at the dynamic symbols exported by an executable. 96 97 - <private/bionic_tls.h>: use kernel helper functions for static versions 98 of the C library. This is necessary because we don't know where the corresponding 99 machine code is going to run, and the optimization for __get_tls() might 100 not match the features of the target device where we run a static executable 101 linked to the C library. This fixes one of the bug that explains why gdbserver 102 didn't work well with threads. 103 104 ------------------------------------------------------------------------------- 105 Differences between Android 2.2. and Android 2.1: 106 107 - Support FP register save/load in setjmp()/longjmp() on ARMv7 builds. 108 109 - Add support for SH-4 CPU architecture ! 110 111 - __atomic_swap(): use LDREX/STREX CPU instructions on ARMv6 and higher. 112 113 - <arpa/telnet.h>: New header (declarations only, no implementation). 114 115 - <err.h>: New header + implementation. GLibc compatibility. 116 117 - <warn.h>: New header + implementation. GLibc compatibility. 118 119 - <fts.h>: New header + implementation. 120 121 - <mntent.h>: Add missing <stdio.h> include. 122 123 - <regex.h>: New header + implementation. 124 125 - <signal.h>: Added killpg() 126 127 - <stdint.h>: Allow 64-bit type declarations on C99 builds. 128 129 - <stdio.h>: Add fdprintf() and vfdprintf(). Note that GLibc provides 130 the confusing 'dprintf' and 'vdprintf()' functions instead. 131 132 - <stdlib.h>: Fix ptsname_r(): the return type is int instead of char*. 133 The mistake comes from a GLibc man page bug (the man page listed a return 134 type of char*, while the implementation used int. Fixed in late 2009 only). 135 The Bionic implementation was incorrect. Technically, this is an ABI 136 breakage, but code that used this function probably never worked or 137 compiled properly anyway. 138 139 - <strings.h>: Add missing <sys/types.h> include. 140 141 - <sys/queue.h>: Added new header (no implementation - macro templates). 142 143 - <sys/resource.h>: Add rlim_t proper definition. 144 145 - <time64.h>: Add missing C++ header inclusion guards. 146 147 - <unistd.h>: Add getusershell(), setusershell() and endusershell(), though 148 implementation are bogus. GLibc compatibility. 149 150 - <wchar.h>: Add mbstowcs() and wcstombs() 151 152 - add clone() implementation for ARM (x86 and SH-4 not working yet). 153 154 - <sys/epoll.h>: <sys/system_properties.h>: Add missing C++ inclusion guards 155 156 - fix getpwnam() and getpwgrp() to accept "app_0" as a valid user name. 157 158 - fix sem_trywait() to return -1 and set errno to EAGAIN, instead of 159 returning EAGAIN directly. 160 161 - fix sem_post() to wake up multiple threads when called rapidly in 162 succession. 163 164 - DNS: partial implementation of RFC3484 (rule 1, 2, 5, 6, 8, 10 and 165 modified rule 9), for better address selection/sorting. 166 In the process, removed code that was previously used for "sortlist" 167 in /etc/resolv.conf. (resolv.conf is already ignored, so the latter 168 is a no-op for actual functionality.) 169 170 - fix pthread_sigmask() to properly return an error code without touching 171 errno. Previous implementation returned -1 on error, setting errno, which 172 is not Posix compliant. 173 174 - add sigaltstack() implementation for ARM. 175 176 - <time.h>: Properly implement the 'timezone' and 'daylight' global variables 177 (they were not defined previously, though declared in the header). 178 179 - <time.h>: Fix timezone management implementation to properly update 180 'tm_gmtoff' field in 'struct tm' structure. 181 182 - DNS: get rid of spurious random DNS queries when trying to resolve 183 an unknown domain name. Due to an initialization bug, a random DNS search 184 list was generated for each thread if net.dns.search is not defined. 185 186 - <pthread.h>: Add pthread_condattr_init/destroy/setpshared/getpshared functions 187 to enable proper shared conditional variable initialization. 188 189 Modify the pthread_mutex_t and pthread_cond_t implementation to use private 190 futexes for performance reasons. Mutexes and Condvars are no longer shareable 191 between processes by default anymore, unless you use PTHREAD_PROCESS_SHARED 192 with pthread_mutexattr_setpshared() and/or pthread_condattr_setpshared(). 193 194 ------------------------------------------------------------------------------- 195 Differences between Android 2.1 and 2.0.1: 196 197 - zoneinfo: updated data tables to version 2009s 198 199 200 ------------------------------------------------------------------------------- 201 Differences between Android 2.0.1 and 2.0: 202 203 - abort(): ARM-specific hack to preserve the 'lr' register when abort() 204 is called (GCC does not preserve it by default since it thinks that 205 abort() never returns). This improves stack traces considerably. 206 207 208 ------------------------------------------------------------------------------- 209 Differences between Android 2.0 and 1.6: 210 211 - memcmp(), memcpy(): ARMv7 optimized versions. 212 213 - pthread_mutexattr_setpshared(): implementation will not return ENOTSUP 214 if PTHREAD_PROCESS_SHARED is used, because our Mutex implementation can 215 work across multiple processes. 216 217 *HOWEVER* it does not use "robust futexes" which means that held mutexes 218 *are not* automatically released by the kernel when the owner process 219 crashes or exits. This is only done to simplify communication between 220 two always-live system processes, DO NOT USE THIS IN APPLICATIONS ! 221 222 - pthread_mutex_lock_timeout_np(): New Android-specific function to 223 perform a timed lock (). In case of timeout, it returns EBUSY. 224 225 - pthread_cond_timedwait_monotonic_np(): Same as pthread_cond_timedwait() 226 but uses the monotonic clock(). Android-specific. 227 228 - pthread_cond_timedwait_relative_np(): Same as pthread_cond_timedwait() 229 but uses a relative timeout instead. Android-specific. 230 231 - <netinet/in.h>: Now includes <netinet/in6.h>. 232 233 - <netinet/in6.h>: Added IPV6_JOIN_GROUP, IPV6_LEAVE_GROUP, IN6ADDR_ANY_INIT 234 and ipv6mr_interface definitions. 235 236 - <time.h>: 237 * Add missing tzset() declaration. 238 * Add Android-specific strftime_tz(). 239 240 - getaddrinfo(): 241 Only perform IPv6 lookup for AF_UNSPEC if we have IPv6 connectivity. 242 This saves one DNS query per lookup on non-IPv6 systems. 243 244 - mktime(): Fix an infinite loop problen that appeared when switching to 245 GCC 4.4.0. 246 247 - strftime(): fix incorrect handling of dates > 2038 due to 64-bit issue 248 in original code. 249 250 ------------------------------------------------------------------------------- 251 Differences between Android 1.6 and 1.5: 252 253 - C runtime: Fix runtime initialization to be called before any static C++ 254 constructors. This allows these to use pthread functions properly. 255 256 - __aeabi_atexit(): Fix implementation to properly call C++ static destructors 257 when the program exits (or when a shared library is unloaded). 258 259 - <sys/stat.h>: added GLibc compatibility macros definitions: 260 261 #define st_atimensec st_atime_nsec 262 #define st_mtimensec st_mtime_nsec 263 #define st_ctimensec st_ctime_nsec 264 265 - getaddrinfo(): implementation will now allow numeric ports if ai_socktype is 266 set to ANY. This is to match the GLibc behaviour. 267 268 - getservent(): and getservent_r() incorrectly returned the port in host-endian 269 order in the s_port field. It now returns it in big-endian order. 270 271 - DNS: Allow underscore in the middle of DNS labels. While not really 272 standard, this extension is needed for some VPN configurations and is 273 supported by other operating systems. 274 275 - DNS: Support for DNS domain search lists through the new net.dns.search 276 system property. The corresponding value must be a space-separated list of 277 domain suffixes. 278
