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331722 |
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29-Mar-2018 |
eadler |
Revert r330897:
This was intended to be a non-functional change. It wasn't. The commit message was thus wrong. In addition it broke arm, and merged crypto related code.
Revert with prejudice.
This revert skips files touched in r316370 since that commit was since MFCed. This revert also skips files that require $FreeBSD$ property changes.
Thank you to those who helped me get out of this mess including but not limited to gonzo, kevans, rgrimes.
Requested by: gjb (re)
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330897 |
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14-Mar-2018 |
eadler |
Partial merge of the SPDX changes
These changes are incomplete but are making it difficult to determine what other changes can/should be merged.
No objections from: pfg
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302408 |
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07-Jul-2016 |
gjb |
Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle. Prune svn:mergeinfo from the new branch, as nothing has been merged here.
Additional commits post-branch will follow.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation |
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277490 |
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21-Jan-2015 |
andrew |
Merge all the copies of _tcb_ctor and _tcb_dtor.
The amd64, i386, and sparc64 versions were identical, with the one difference where the former two used inline asm instead of _tcb_get. I have compared the function before and after replacing the asm with _tcb_get and found the object files to be identical.
The arm, mips, and powerpc versions were almost identical. The only difference was the powerpc version used an alignment of 1 where arm and mips used 16. As this is an increase in alignment is will be safe.
Along with this arm, mips, and powerpc all passed, when initial was true, the value returned from _tcb_get as the first argument to _rtld_allocate_tls. This would then return this pointer back to the caller. We can remove these extra calls by checking if initial is set and setting the thread control block directly. As this is what the sparc64 code does we can use it directly.
As after these observations all the architectures can now have identical code we can merge them into a common file.
Differential Revision: https://reviews.freebsd.org/D1556 Reviewed by: kib Sponsored by: The FreeBSD Foundation
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228536 |
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15-Dec-2011 |
dim |
The TCB_GET32() and TCB_GET64() macros in the i386 and amd64-specific versions of pthread_md.h have a special case of dereferencing a null pointer. Clang warns about this with:
In file included from lib/libthr/arch/i386/i386/pthread_md.c:36: lib/libthr/arch/i386/include/pthread_md.h:96:10: error: indirection of non-volatile null pointer will be deleted, not trap [-Werror,-Wnull-dereference] return (TCB_GET32(tcb_self)); ^~~~~~~~~~~~~~~~~~~ lib/libthr/arch/i386/include/pthread_md.h:73:13: note: expanded from: : "m" (*(u_int *)(__tcb_offset(name)))); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ lib/libthr/arch/i386/include/pthread_md.h:96:10: note: consider using __builtin_trap() or qualifying pointer with 'volatile'
Since this indirection is done relative to the fs or gs segment, to retrieve thread-specific data, it is an exception to the rule.
Therefore, add a volatile qualifier to tell the compiler we really want to dereference a zero address.
MFC after: 1 week
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177853 |
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02-Apr-2008 |
davidxu |
Replace function _umtx_op with _umtx_op_err, the later function directly returns errno, because errno can be mucked by user's signal handler and most of pthread api heavily depends on errno to be correct, this change should improve stability of the thread library.
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165241 |
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15-Dec-2006 |
davidxu |
- Remove variable _thr_scope_system, all threads are system scope. - Rename _thr_smp_cpus to boolean variable _thr_is_smp. - Define CPU_SPINWAIT macro for each arch, only X86 supports it.
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157462 |
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04-Apr-2006 |
davidxu |
Remove declaration of _thr_initial from MD header file, it is no longer needed.
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157461 |
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04-Apr-2006 |
davidxu |
Simplify _get_curthread() and _tcb_ctor because libc and rtld now already allocate thread pointer space in tls block for initial thread. Only i386 and amd64 have been done, others still have to be tested.
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151836 |
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29-Oct-2005 |
davidxu |
Kill unused variable declaration.
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145578 |
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26-Apr-2005 |
davidxu |
Remove COMPAT_32BIT, it is no longer needed.
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145437 |
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23-Apr-2005 |
davidxu |
Now libthr only uses GDT based tls on i386. using LDT can only increase clock cycles and has 8191 threads limitation.
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145040 |
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13-Apr-2005 |
peter |
Adapt the libpthread patch for using i386_set_gsbase() to libthr.
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144518 |
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01-Apr-2005 |
davidxu |
Import my recent 1:1 threading working. some features improved includes: 1. fast simple type mutex. 2. __thread tls works. 3. asynchronous cancellation works ( using signal ). 4. thread synchronization is fully based on umtx, mainly, condition variable and other synchronization objects were rewritten by using umtx directly. those objects can be shared between processes via shared memory, it has to change ABI which does not happen yet. 5. default stack size is increased to 1M on 32 bits platform, 2M for 64 bits platform. As the result, some mysql super-smack benchmarks show performance is improved massivly.
Okayed by: jeff, mtm, rwatson, scottl
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