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Colin Cross [Wed, 2 Jun 2010 02:24:33 +0000 (19:24 -0700)]
Merge "Add headers for new kernel drivers"
Colin Cross [Wed, 2 Jun 2010 00:45:50 +0000 (17:45 -0700)]
Add headers for new kernel drivers
Change-Id: I65e682cef2c20b12faa5e526e82e35ab3ca0c379
Andy McFadden [Tue, 1 Jun 2010 23:11:07 +0000 (16:11 -0700)]
am
fcd00ebb: Atomic/SMP update, part 3.
Andy McFadden [Fri, 28 May 2010 20:31:45 +0000 (13:31 -0700)]
Atomic/SMP update, part 3.
Update ARM atomic ops to use LDREX/STREX. Stripped out #if 0 chunk.
Insert explicit memory barriers in pthread and semaphore code.
For bug
2721865.
Change-Id: I0f153b797753a655702d8be41679273d1d5d6ae7
Andy McFadden [Fri, 21 May 2010 19:08:09 +0000 (12:08 -0700)]
am
4fdbadde: Atomic/SMP update.
Jing Yu [Fri, 21 May 2010 17:50:38 +0000 (10:50 -0700)]
Merge "Remove a gcc-4.5 compilation warning: bionic/libc/include/../include/stdlib.h: In function 'int grantpt(int)': bionic/libc/include/../include/stdlib.h:138:23: warning: parameter '__fd' set but not used [-Wunused-but-set-parameter]"
Jing Yu [Fri, 21 May 2010 03:25:48 +0000 (20:25 -0700)]
Remove a gcc-4.5 compilation warning:
bionic/libc/include/../include/stdlib.h: In function 'int grantpt(int)':
bionic/libc/include/../include/stdlib.h:138:23: warning: parameter '__fd' set but not used [-Wunused-but-set-parameter]
By adding __attribute((unused)) to __fd, the warning is gone, and this
attribute is compatible with gcc-4.4.0, gcc-4.3.1 gcc-4.2.1.
There is no any side effect.
Change-Id: Id9d2b0aeefdd9c37132da0f00c48387f7d897e83
Andy McFadden [Thu, 20 May 2010 05:38:07 +0000 (22:38 -0700)]
Atomic/SMP update.
Added an underscore to _ARM_HAVE_LDREX_STREX to make it match the others.
Added __ARM_HAVE_DMB and __ARM_HAVE_LDREXD when appropriate.
Fixed some typos.
Change-Id: I2f55febcff4aeb7de572a514fb2cd2f820dca27c
David 'Digit' Turner [Thu, 20 May 2010 17:55:45 +0000 (10:55 -0700)]
Add missing sysinfo() implementation (already declared in <sys/sysinfo.h>)
Change-Id: Ie9168238c3a8e77daab4f39939756d4c53d8af37
David 'Digit' Turner [Wed, 19 May 2010 22:12:26 +0000 (15:12 -0700)]
am
8a1d2cf1: (-s ours) Add pthread_rwlock_t implementation to the C library (DO NOT MERGE)
David 'Digit' Turner [Tue, 11 May 2010 23:39:22 +0000 (16:39 -0700)]
Add pthread_rwlock_t implementation to the C library (DO NOT MERGE)
Change-Id: I756d8c26afc37cd7b71117ddbaa02a2cb40fdecb
David 'Digit' Turner [Wed, 19 May 2010 18:39:16 +0000 (11:39 -0700)]
Add sincos() and sincosf() implementation.
This is a GLibc-compatibility patch required to simplify our
upcoming toolchain work/porting.
Change-Id: I615a20a449763f86b6e2b0e4f5ab43fb029ceb6d
The Android Open Source Project [Mon, 17 May 2010 22:03:01 +0000 (15:03 -0700)]
am
8e1ee7fd: merge from open-source master
The Android Open Source Project [Mon, 17 May 2010 17:22:35 +0000 (10:22 -0700)]
merge from open-source master
Change-Id: I5804d8850f2d4fb7b5d5c53d51e153f7ced9646e
André Goddard Rosa [Sun, 31 Jan 2010 00:46:25 +0000 (22:46 -0200)]
improve readability of stdio: fix indentation and remove trailing spaces
Change-Id: Ic51e58a7c75d20bf770dc0ebd7f97a338fbe0036
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
The Android Open Source Project [Fri, 14 May 2010 20:43:56 +0000 (13:43 -0700)]
am
fdf2454d: merge from open-source master
The Android Open Source Project [Fri, 14 May 2010 20:30:10 +0000 (13:30 -0700)]
merge from open-source master
Change-Id: I9c926a3cd680a96ece026cdec71c6e0fb0b7ad7c
David Turner [Fri, 14 May 2010 19:12:24 +0000 (12:12 -0700)]
Merge "Add declaration for sys_signame[] forgotten in change 12489"
The Android Open Source Project [Thu, 13 May 2010 21:46:26 +0000 (14:46 -0700)]
am
4aef0ae6: merge from open-source master
The Android Open Source Project [Thu, 13 May 2010 21:31:02 +0000 (14:31 -0700)]
merge from open-source master
Change-Id: I2be62bce462ee53fe9519f433523bd7a44a73d40
David 'Digit' Turner [Tue, 11 May 2010 23:39:22 +0000 (16:39 -0700)]
Add pthread_rwlock_t implementation to the C library
Change-Id: I14d0a112554756a7294a51fe88c1c408a16b5ff1
Matt Fischer [Mon, 11 Jan 2010 02:02:06 +0000 (10:02 +0800)]
Set SA_RESTORER in sigaction()
GDB looks for specific opcode sequences when trying to recognize a stack
frame as a signal trampoline. The sequences it looks for happen to be those
created when SA_RESTORER is set, since glibc always sets a restorer. This
patch does the same here, so that the trampolines can be correctly identified.
Change-Id: I0ac574a68818cb24d939c3527f3aaeb04b853d04
Jean-Baptiste Queru [Wed, 12 May 2010 17:10:41 +0000 (10:10 -0700)]
Jean-Baptiste Queru [Wed, 12 May 2010 17:05:59 +0000 (10:05 -0700)]
fix build
Change-Id: I243c98e20a250e0d40d481f16af481ff070219fd
The Android Open Source Project [Wed, 12 May 2010 16:51:35 +0000 (09:51 -0700)]
am
bb7928cc: merge from open-source master
The Android Open Source Project [Wed, 12 May 2010 16:22:50 +0000 (09:22 -0700)]
merge from open-source master
Change-Id: Iecfd2bd3069f70bbe508042cc249fcf7ff24800d
David 'Digit' Turner [Wed, 12 May 2010 01:16:14 +0000 (18:16 -0700)]
Merge "Fix setjmp()/longjmp() to save FP registers on ARMv7."
Jean-Baptiste Queru [Tue, 11 May 2010 17:43:56 +0000 (10:43 -0700)]
Merge "Sometimes the compiler is very right! Found bug in bessel routines for float."
David Turner [Tue, 11 May 2010 17:20:15 +0000 (10:20 -0700)]
Merge "Reduce compiler anxiety."
David Turner [Tue, 11 May 2010 17:17:00 +0000 (10:17 -0700)]
Merge "Added support for LD_PRELOAD"
David Turner [Mon, 10 May 2010 23:04:02 +0000 (16:04 -0700)]
Merge "stdio: simplify __fremovelock()"
Jean-Baptiste Queru [Mon, 10 May 2010 23:00:22 +0000 (16:00 -0700)]
Merge "Reversed order of const and static to hush warning from compiler."
André Goddard Rosa [Sun, 31 Jan 2010 00:45:07 +0000 (22:45 -0200)]
stdio: simplify __fremovelock()
... by removing extraneous NULL check, as free() already does it.
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Change-Id: I0445f35c7ad0a049a0e4aee1fbe002ed2f13b94b
Matt Fischer [Thu, 31 Dec 2009 18:09:10 +0000 (12:09 -0600)]
Added support for LD_PRELOAD
The LD_PRELOAD environment variable allows the user to specify a list of
libraries which should be unconditionally loaded before any others. This
makes possible some useful tricks, such as library interposers.
Change-Id: I433d775ab08ef63a5fbe7b21f87a5642954fc32f
David Turner [Mon, 10 May 2010 21:52:02 +0000 (14:52 -0700)]
Merge "string: tidy up strndup()"
Scott Turner [Sat, 16 Jan 2010 16:30:44 +0000 (11:30 -0500)]
Sometimes the compiler is very right! Found bug in bessel routines for float.
Original compiler error:
target arm C: libm <= bionic/libm/src/e_j0f.c
bionic/libm/src/e_j0f.c: In function 'j0f':
bionic/libm/src/e_j0f.c:66: warning: comparison between signed and unsigned integer expressions
bionic/libm/src/e_j0f.c: In function 'y0f':
bionic/libm/src/e_j0f.c:140: warning: comparison between signed and unsigned integer expressions
target arm C: libm <= bionic/libm/src/e_j1.c
It's subtle but ix is masked with 0x7f000000 so it can never ever have a value
greater than 0x80000000. So I switched to using the unmasked hx and added a
cast as a reward to the compiler for being right.
I checked the original routines that e_j0f.c was ported from (in e_j0.c) and
the double's don't use 0x80000000 so this issue didn't exist there.
Let that be a warning to those that just slap on casts to shut up the compiler,
sometimes it's sniffed out a bug for you. :-)
Similar fixes in the other functions.
Change-Id: I7a776e5d4721fc3a9e3bd89179b67e9af3a2ebfa
The Android Open Source Project [Mon, 3 May 2010 22:39:55 +0000 (15:39 -0700)]
am
f450fa5f: merge from open-source master
The Android Open Source Project [Mon, 3 May 2010 22:33:05 +0000 (15:33 -0700)]
merge from open-source master
Change-Id: If02d33af51017dbd85e91c79ac2e848eda6cf253
David Turner [Sat, 1 May 2010 22:31:39 +0000 (15:31 -0700)]
Merge "Fix log channel initialization at bionic/logd_write.c."
Jean-Baptiste Queru [Thu, 29 Apr 2010 15:01:50 +0000 (08:01 -0700)]
Merge "added headers for SuperH which automatically generate by update_all.py"
Yi Sun [Wed, 2 Dec 2009 08:08:14 +0000 (00:08 -0800)]
linker: fix the undefined weak symbols issue
I'm not sure if this is a correct fix or not.
Also need to find out why 1.6 does not have this issue.
Change-Id: If46c844834bda1e2cbf084a1a45a1832119b3ae3
André Goddard Rosa [Fri, 5 Feb 2010 18:03:09 +0000 (16:03 -0200)]
bionic: add missing NULL check from memory allocation on record_backtrace()
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Change-Id: I739c63c5a7344fff1775580044dc647edf246ebf
André Goddard Rosa [Sun, 31 Jan 2010 00:40:45 +0000 (22:40 -0200)]
stdio: simplify vasprintf()
... by removing unneeded NULL check, as free() already does it.
By the way, we don't need to set a stack variable back to NULL.
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Change-Id: Id90eb8f042b5c922c5ff139b11ff8366fb404566
André Goddard Rosa [Sun, 31 Jan 2010 00:39:00 +0000 (22:39 -0200)]
stdio: simplify asprintf()
... by removing unneeded NULL check, as free() already does it.
By the way, we don't need to set a stack variable back to NULL.
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Change-Id: Id1f72e872f73366dddcea4abc75885a3d9a318c6
André Goddard Rosa [Fri, 5 Feb 2010 20:32:52 +0000 (18:32 -0200)]
improve readability of stdlib: fix indentation and remove trailing spaces
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Change-Id: I7dd90a0816b5376ffc1de4499d56935e0bd574a1
The Android Open Source Project [Wed, 21 Apr 2010 16:24:08 +0000 (09:24 -0700)]
am
5ef5272b: merge from open-source master
The Android Open Source Project [Wed, 21 Apr 2010 16:10:08 +0000 (09:10 -0700)]
merge from open-source master
Change-Id: I518bb4ae9d7269957365561d4d609f22cde519db
The Android Open Source Project [Thu, 8 Apr 2010 18:23:30 +0000 (11:23 -0700)]
am
95faecef: merge from open-source master
The Android Open Source Project [Thu, 8 Apr 2010 18:11:53 +0000 (11:11 -0700)]
merge from open-source master
Change-Id: If77618a329fc7b497c44c2585e644bc50e7e1406
Matt Fischer [Thu, 31 Dec 2009 18:17:56 +0000 (12:17 -0600)]
Fixed support for RTLD_NEXT in dlsym()
The previous implementation of this flag was broken--it behaved identically
to RTLD_DEFAULT. This adds a proper implementation, which examines the address
of the calling function, and uses it to determine which library to use to begin
the symbol search process.
Change-Id: I2ad2b46363f68932af63a3828a22f9c7987eea67
San Mehat [Wed, 7 Apr 2010 06:48:03 +0000 (23:48 -0700)]
am
f1cd18bd: am
91638721: kernel_headers: Update rtnetlink/pkt_sched headers for 2.6.32
San Mehat [Wed, 7 Apr 2010 05:02:48 +0000 (22:02 -0700)]
am
91638721: kernel_headers: Update rtnetlink/pkt_sched headers for 2.6.32
Merge commit '
9163872132a3e92f986b1d684badb1dd4482ad8e' into froyo-plus-aosp
* commit '
9163872132a3e92f986b1d684badb1dd4482ad8e':
kernel_headers: Update rtnetlink/pkt_sched headers for 2.6.32
San Mehat [Wed, 7 Apr 2010 01:49:49 +0000 (18:49 -0700)]
kernel_headers: Update rtnetlink/pkt_sched headers for 2.6.32
For: For http://b/issue?id=
2576057
Change-Id: I553ca14974aaec4434e384979e0bb7007dcf6033
Signed-off-by: San Mehat <san@google.com>
Thorsten Glaser [Tue, 1 Dec 2009 14:12:01 +0000 (15:12 +0100)]
Add declaration for sys_signame[] forgotten in change 12489
The Android Open Source Project [Wed, 31 Mar 2010 21:40:08 +0000 (14:40 -0700)]
am
1d168621: merge from open-source master
The Android Open Source Project [Wed, 31 Mar 2010 21:40:06 +0000 (14:40 -0700)]
am
d0467251: merge from open-source master
The Android Open Source Project [Wed, 31 Mar 2010 21:32:53 +0000 (14:32 -0700)]
am
5ffedb22: merge from open-source master
The Android Open Source Project [Wed, 31 Mar 2010 21:24:25 +0000 (14:24 -0700)]
merge from open-source master
Change-Id: I950e9aca87cbb0c35099b1d53cff6378bd0f26f4
The Android Open Source Project [Wed, 31 Mar 2010 21:19:51 +0000 (14:19 -0700)]
merge from open-source master
Change-Id: I483fedf77d978b1c6e52d73eebc14f011bb9f809
The Android Open Source Project [Wed, 31 Mar 2010 21:15:30 +0000 (14:15 -0700)]
merge from open-source master
Change-Id: I076e0df8656fdf58c229cc9a168cd6d8e16b6d8e
André Goddard Rosa [Fri, 5 Feb 2010 18:01:05 +0000 (16:01 -0200)]
bionic: fix memory leak in get_malloc_leak_info() error path
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
David Turner [Tue, 30 Mar 2010 21:52:14 +0000 (14:52 -0700)]
Merge "bionic: clear only the part of the buffer which is not overwritten afterward"
David Turner [Mon, 29 Mar 2010 22:49:42 +0000 (15:49 -0700)]
Merge "linker: fix the undefined weak symbols issue"
Min-su, Kim [Tue, 19 Jan 2010 01:05:33 +0000 (10:05 +0900)]
linker: fix the undefined weak symbols issue
David Turner [Mon, 29 Mar 2010 22:05:47 +0000 (15:05 -0700)]
Merge changes Ibdc6e3c8,I9bcb91a2
* changes:
Correct generic memset implementation
Generic memcpy should define MEMCOPY before including bcopy.c
David Turner [Mon, 29 Mar 2010 21:40:05 +0000 (14:40 -0700)]
Merge "Atom optimized string and memory routines"
David 'Digit' Turner [Mon, 29 Mar 2010 20:03:55 +0000 (13:03 -0700)]
Merge "Update libthread_db for gdb-7.0"
The Android Open Source Project [Mon, 29 Mar 2010 18:01:59 +0000 (11:01 -0700)]
merge from open-source master
Change-Id: I96d2cd063f084fd17116bf7ee08fa7109a3c1ceb
André Goddard Rosa [Mon, 29 Mar 2010 00:32:36 +0000 (21:32 -0300)]
bionic: clear only the part of the buffer which is not overwritten afterward
Change-Id: I5ddd93f0557e5a7401460dc9fc8a55b330a79c3a
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
André Goddard Rosa [Mon, 29 Mar 2010 00:18:56 +0000 (21:18 -0300)]
stdlib: optimize bsearch()
... by checking most probable condition first (elements do differ)
Change-Id: I424eab9c32a6d9eb82b686ca04025ec8c9097035
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Bruce Beare [Thu, 4 Mar 2010 19:03:37 +0000 (11:03 -0800)]
Atom optimized string and memory routines
Change-Id: I27b68bb28551c75c9ac84bb9730e2cd8254d8991
Bruce Beare [Wed, 10 Mar 2010 23:52:42 +0000 (15:52 -0800)]
Android hack for size_t
Change-Id: I3c967fca60f542459dc17be84da47b3b6a26242b
David 'Digit' Turner [Thu, 25 Mar 2010 16:54:33 +0000 (09:54 -0700)]
Fix setjmp()/longjmp() to save FP registers on ARMv7.
Change-Id: I8ec684c8f8ca1ae58c8feb330b97d1e2b81caeef
Kenny Root [Thu, 25 Mar 2010 01:06:20 +0000 (18:06 -0700)]
Fix comparison of IPv6 prefixes
Typo assigned prefixlen1 twice instead of to the two different variables
for comparison and difference computation.
Change-Id: I6631b8269ca6aae264c8d7d414127b756838df96
David 'Digit' Turner [Fri, 19 Mar 2010 23:01:28 +0000 (16:01 -0700)]
Update libthread_db for gdb-7.0
Change-Id: If8fbcea1cf6d06fc465a22d73671e6ff6aa1f312
Dima Zavin [Tue, 9 Mar 2010 01:34:52 +0000 (17:34 -0800)]
libc: kernel: update msm_kgsl.h
Change-Id: I8cd5a186071892bdc2b2b29061dd6c1fd927c0f5
Signed-off-by: Dima Zavin <dima@android.com>
David 'Digit' Turner [Tue, 23 Mar 2010 12:30:55 +0000 (05:30 -0700)]
Fix typo that broke recursive mutexes implementation.
Change-Id: I832901604b487c6a50304c311b5ba135e153530d
David 'Digit' Turner [Sat, 20 Mar 2010 00:59:23 +0000 (17:59 -0700)]
pthread: Use private futexes by default in condition variables
Now that the system properly uses shared condvars when needed, we
can enable the use of private futexes for them too.
Change-Id: Icf8351fc0a2309f764cba45c65bc3af047720cdf
The Android Open Source Project [Mon, 22 Mar 2010 22:55:09 +0000 (15:55 -0700)]
merge from open-source master
Change-Id: I70266ee8c520b216773f267e46c8273d2334c31d
David 'Digit' Turner [Mon, 22 Mar 2010 22:45:32 +0000 (15:45 -0700)]
Merge "Fix strtod security bug."
David 'Digit' Turner [Fri, 19 Mar 2010 00:13:41 +0000 (17:13 -0700)]
Use private futexes for pthread_mutex_t.
This does not change the implementation of conditional variables
since we're waiting for other system components to properly use
pthread_condattr_init/setpshared before that.
Also remove an obsolete x86 source file.
Change-Id: Ia3e3fbac35b87a534fb04d4381c3c66b975bc8f7
David Turner [Thu, 18 Mar 2010 23:42:49 +0000 (16:42 -0700)]
Merge "bionic: on pthread_join(), avoid extra check in case we find the thread"
David Turner [Thu, 18 Mar 2010 23:35:42 +0000 (16:35 -0700)]
Merge "bionic: ftell() returns a long, not an int"
David 'Digit' Turner [Thu, 18 Mar 2010 21:07:42 +0000 (14:07 -0700)]
Add pthread_condattr_init/destroy/setpshared/getpshared
Note that this does not change the implementation of conditional variables
which still use shared futexes, independent on the flags being selected.
This will be fixed in a later patch, once our system is modified to use
pthread_condattr_setpshared(attr, PTHREAD_PROCESS_SHARED) properly.
Change-Id: I935de50964cd41f97a13dbfd6626d3407b0406c3
Matt Fischer [Thu, 31 Dec 2009 18:17:40 +0000 (12:17 -0600)]
Added support for dladdr()
dladdr() is a GNU extension function, which allows the caller to retrieve
symbol information for a specified memory address. It is useful for things
like generating backtrace information at runtime.
Change-Id: I3a1def1a6c9c666d93e1e97b7d260dfa5b9b79a9
David Turner [Wed, 17 Mar 2010 21:07:27 +0000 (14:07 -0700)]
Merge "x86 syscall system call implementation"
David Turner [Wed, 17 Mar 2010 21:00:20 +0000 (14:00 -0700)]
Merge "Fix pread()/pwrite() stubs"
David 'Digit' Turner [Wed, 17 Mar 2010 18:25:46 +0000 (11:25 -0700)]
Fix indentation in pthread mutex implementation.
This is preliminary work to simplify later changes to support
private futexes.
Change-Id: I06750936a93747a5e3f5a10228cbdc29e39c528c
David Turner [Wed, 17 Mar 2010 00:26:44 +0000 (17:26 -0700)]
Merge "bionic: remove unneeded variable from chk_realloc()"
David Turner [Wed, 17 Mar 2010 00:25:53 +0000 (17:25 -0700)]
Merge "bionic: equalize the <unknown> program name between ssp.c and libc_init_common.c"
David Turner [Wed, 17 Mar 2010 00:25:04 +0000 (17:25 -0700)]
Merge "improve readability of string: fix indentation and remove trailing spaces"
David Turner [Wed, 17 Mar 2010 00:21:52 +0000 (17:21 -0700)]
Merge "optimize delete/delete[] operators by removing unneeded branch"
Fabrice Di Meglio [Thu, 11 Mar 2010 22:47:47 +0000 (14:47 -0800)]
Revert "bionic: pthread: use private futexes by default for mutexes and condvars"
This reverts commit
ba9c6f0989ae94778ba2b9f597adc827c9dc81e8.
David 'Digit' Turner [Thu, 11 Mar 2010 00:44:08 +0000 (16:44 -0800)]
bionic: pthread: use private futexes by default for mutexes and condvars
Private futexes are a recent kernel addition: faster futexes that cannot be
shared between processes. This patch uses them by default, unless the PROCESS_SHARED
attribute flag is used when creating a mutex and/or conditional variable.
Also introduces pthread_condattr_init/destroy/setpshared/getpshared.
Change-Id: I3a0e2116f467072b046524cb5babc00e41057a53
Colin Cross [Thu, 11 Mar 2010 02:14:25 +0000 (18:14 -0800)]
Merge "Only use NEON memcpy if __ARM_NEON__ is defined"
Colin Cross [Wed, 10 Mar 2010 00:23:51 +0000 (16:23 -0800)]
Only use NEON memcpy if __ARM_NEON__ is defined
Change-Id: I32e6b9385d46efeec15dee8e395a82eef24ba3ea
David 'Digit' Turner [Thu, 4 Mar 2010 19:51:42 +0000 (11:51 -0800)]
Fix strtod security bug.
To avoid introducing NULL checks everytime a Bigint computation
is performed, introduce a special value (BIGINT_INVALID) and only
check for it when absolutely needed (which means when the code
needs to access the Bigint's internal structure fields).
Change-Id: Ie3954523b0985b6a8cb62340802d8dcf63cbf16f
David 'Digit' Turner [Tue, 9 Mar 2010 19:13:35 +0000 (11:13 -0800)]
Merge "Fix spurious DNS lookups in the C library."
Jean-Baptiste Queru [Tue, 9 Mar 2010 02:04:02 +0000 (18:04 -0800)]
Add an empty CleanSpec.mk
Change-Id: Id233ea6f854253776f57e64196e262c5a057e654
David 'Digit' Turner [Mon, 8 Mar 2010 23:13:04 +0000 (15:13 -0800)]
Fix spurious DNS lookups in the C library.
The problem was that the 'defdname' field of res_state structure
was not properly initialized in __res_vinit(). This field is used
to store the default domain name, which is normally build from
calling gethostname() (see line 549 of res_init.c).
Unfortunately, in the typical Android case, gethostname() returns
an error (the hostname is configured) and a random stack string is
used later to build the DNS search list (see lines 556+ in res_init.c)
For the sake of illustration, let's say the search list is set to
a random value like 'xWLK'.
The end result is that when trying to result an unknown domain name
(e.g. 'www.ptn'), the query fails then the resolver tries to make a
new query with the DNS search list path(s) appended (e.g. 'www.ptn.xWLK').
The patch simply initializes 'defdname' to an empty string to avoid
this when the net.dns.search system property is not set.
Also contains whitespace/formatting fixes