From owner-cvs-all  Sun Dec 26 20:44: 8 1999
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From: John Polstra <jdp@FreeBSD.org>
Date: Sun, 26 Dec 1999 20:44:04 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/include dlfcn.h src/lib/libc/gen dllockinit.3
         Makefile.inc dlfcn.c src/libexec/rtld-elf lockdflt.c Makefile
         debug.h rtld.c rtld.h src/libexec/rtld-elf/alpha reloc.c
         src/libexec/rtld-elf/i386 reloc.c
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jdp         1999/12/26 20:44:04 PST

  Modified files:
    include              dlfcn.h 
    lib/libc/gen         Makefile.inc dlfcn.c 
    libexec/rtld-elf     Makefile debug.h rtld.c rtld.h 
    libexec/rtld-elf/alpha reloc.c 
    libexec/rtld-elf/i386 reloc.c 
  Added files:
    lib/libc/gen         dllockinit.3 
    libexec/rtld-elf     lockdflt.c 
  Log:
  Add a new function dllockinit() for registering thread locking
  functions to be used by the dynamic linker.  This can be called by
  threads packages at start-up time.  I will add the call to libc_r
  soon.
  
  Also add a default locking method that is used up until dllockinit()
  is called.  The default method works by blocking SIGVTALRM, SIGPROF,
  and SIGALRM in critical sections.  It is based on the observation
  that most user-space threads packages implement thread preemption
  with one of these signals (usually SIGVTALRM).
  
  The dynamic linker has never been reentrant, but it became less
  reentrant in revision 1.34 of "src/libexec/rtld-elf/rtld.c".
  Starting with that revision, multiple threads each doing lazy
  binding could interfere with each other.  The usual symptom was
  that a symbol was falsely reported as undefined at start-up time.
  It was rare but not unseen.  This commit fixes it.
  
  Revision  Changes    Path
  1.7       +8 -1      src/include/dlfcn.h
  1.57      +2 -2      src/lib/libc/gen/Makefile.inc
  1.6       +15 -1     src/lib/libc/gen/dlfcn.c
  1.9       +3 -3      src/libexec/rtld-elf/Makefile
  1.4       +10 -1     src/libexec/rtld-elf/debug.h
  1.40      +119 -17   src/libexec/rtld-elf/rtld.c
  1.13      +5 -1      src/libexec/rtld-elf/rtld.h
  1.9       +1 -10     src/libexec/rtld-elf/alpha/reloc.c
  1.5       +1 -10     src/libexec/rtld-elf/i386/reloc.c



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