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