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authorEric Andersen <andersen@codepoet.org>2001-11-24 10:17:24 +0000
committerEric Andersen <andersen@codepoet.org>2001-11-24 10:17:24 +0000
commitdfb5fe2dee1b64c57c3df7fc4c0ecb7ad0450730 (patch)
treecc3db9a916b8d9821f142b97a3200bad61c3975e /docs/threads.txt
parent1df709beaf6f88e7906d427be4f0c7dcf12e8a55 (diff)
Move the FAQ. Add a docs dir. Add in a report on thread support.
-Erik
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+uClibc thread-safety analysis
+By Steve Thayer <sthayer@coactive.com>
+with updates by Erik Andersen <andersee@debian.org>
+
+Introduction:
+
+The purpose of this document is to identify the things that need to be done
+to the uClibc C library in order to make it thread-safe. The goal is to be
+able to use a pthreads thread implementation under uClinux, using the uClibc
+C library. To help identify the things that require changing, I used David R.
+Butenhof's book Programming With POSIX Threads, the source code for the
+glibc 2.1.3 C library, and the source code for the C library included in the
+Proventhreads distribution.
+
+References:
+
+Butenhof, David R., Programming With POSIX Threads, Addison Wesley Longman, Inc., Reading, MA, ISBN 0-201-63392-2, 1997.
+
+
+The GNU C library is available from the Free Software Foundation
+http://www.gnu.org/software/libc/libc.html
+
+Proventhreads is part of the Inferno Operating system.
+http://www.vitanuova.com/inferno/index.html
+
+
+1. Stdio:
+
+1.1 Buffer access mutexes
+
+ The following functions are required in order to protect shared
+ I/O buffers from being accessed by more than one thread at a time.
+ None of these functions are currently implemented in the uClibc
+ library, so they must be added.
+
+ flockfile <required> <---
+ ftrylockfile <required> <---
+ funlockfile <required> <---
+
+1.2 Functions that must use buffer access mutexes, according to Butenhof
+
+ The following functions are identified by Butenhof as needing to use
+ buffer access mutexes. This does not represent all functions that
+ need to use the mutexes.
+
+ getc <mutex required> <---
+ getchar <mutex required> <---
+ putc <mutex required> <---
+ putchar <mutex required> <---
+
+1.3 Functions from glibc (libio) that use buffer access mutexes
+
+ The following functions are functions found in glibc that currently
+ use the buffer access mutexes. Comments in brackets represent
+ status of uClibc with regard to these functions. Most of these
+ functions aren't even supported under uClibc, so no work is required.
+ The rest may require the access mutex. (These must be analyzed on a
+ case-by-case basis.)
+
+ clearerr <mutex required> <---
+ feof <mutex required> <---
+ ferror <mutex required> <---
+ fputc <mutex required> <---
+ fputwc <not supported>
+ freopen <mutex required> <---
+ freopen64 <not supported>
+ fseek <mutex required> <---
+ fseeko <not supported>
+ fseeko64 <not supported>
+ ftello <not supported>
+ ftello64 <not supported>
+ fwide <not supported>
+ getc <macro for fgetc>
+ getchar <macro for fgetc>
+ getwc <not supported>
+ getwchar <not supported>
+ iofclose <not supported>
+ iofflush <not supported>
+ iofgetpos <not supported>
+ iofgetpos64 <not supported>
+ iofgets <not supported>
+ iofgetws <not supported>
+ iofputs <not supported>
+ iofputws <not supported>
+ iofread <not supported>
+ iofsetpos <not supported>
+ iofsetpos64 <not supported>
+ ioftell <not supported>
+ iofwrite <not supported>
+ iogetdelim <not supported>
+ iogets <not supported>
+ ioputs <not supported>
+ ioseekoff <not supported>
+ ioseekpos <not supported>
+ iosetbuffer <not supported>
+ iosetvbuf <not supported>
+ ioungetc <not supported>
+ ioungetwc <not supported>
+ oldiofclose <not supported>
+ oldiofgetpos <not supported>
+ oldiofgetpos64 <not supported>
+ oldiofsetpos <not supported>
+ oldiofsetpos64 <not supported>
+ peekc <not supported>
+ putc <macro for fputc>
+ putchar <macro for fputc>
+ putwc <not supported>
+ putwchar <not supported>
+ rewind <mutex required> <---
+
+1.4 Functions from Proventhreads that use buffer access mutexes
+
+ See description above. This applies only to the C library included
+ in the proventhreads distribution.
+
+ clearerr <mutex required> <---
+ fclose <mutex required> <---
+ fflush <mutex required> <---
+ fgetc <mutex required> <---
+ __getc <not supported>
+ fgetline <not supported>
+ fgetpos <mutex required> <---
+ fgets <mutex required> <---
+ fpurge <not supported>
+ fputc <mutex required> <---
+ __putc <not supported>
+ fputs <mutex required> <---
+ fread <mutex required> <---
+ freopen <mutex required> <---
+ fscanf <mutex required> <---
+ fseek <mutex required> <---
+ ftell <mutex required> <---
+ fwalk <not supported>
+ fwrite <mutex required> <---
+ getc <macro for fgetc>
+ getchar <mutex required> <---
+ putc <macro for fputc>
+ putchar <mutex required> <---
+ puts <mutex required> <---
+ putw <not supported>
+ refill <not supported>
+ rewind <mutex required> <---
+ scanf <mutex required> <---
+ setvbuf <mutex required> <---
+ ungetc <mutex required> <---
+ vfprintf <mutex required> <---
+ vscanf <mutex required> <---
+
+1.5 Unlocked buffer access
+
+ These functions get used in situations where speed is important,
+ and locking isn't necessary, or for use in a section of code that
+ is already locked. For example, a for-loop that makes multiple calls
+ to getc could make an exlicit call to flockfile outside the loop, and
+ then use getc_unlocked within the loop for speed. That way, the lock
+ only needs to be grabbed and released once, rather than for each call.
+
+ getc_unlocked <required> <---
+ getchar_unlocked <required> <---
+ putc_unlocked <required> <---
+ putchar_unlocked <required> <---
+
+1.6 Additional unlocked calls made in glibc
+
+ These are additional functions (not mentioned by Butenhof) that the
+ glibc library uses for unlocked buffer access. Though not strictly
+ necessary, these may be nice to have in uClibc.
+
+ fileno_unlocked <desired> <---
+ clearerr_unlocked <desired> <---
+ feof_unlocked <desired> <---
+ ferror_unlocked <desired> <---
+ fputc_unlocked <desired> <---
+ fgetc_unlocked <desired> <---
+ fflush_unlocked <desired> <---
+ fread_unlocked <desired> <---
+ fwrite_unlocked <desired> <---
+ fgets_unlocked <desired> <---
+ fputs_unlocked <desired> <---
+
+1.7 Additional unlocked calls made in Proventhreads
+
+ Proventhreads only provides the four unlocked function calls above.
+
+ <none>
+
+
+2. Thread-safe functions:
+
+ There are some functions in the C library standard that are
+ simply not thread-safe and cannot be thread-safe using their
+ current interface. For example, any function that returns a
+ pointer to static data, or requires static context between
+ calls. To resolve this problem, new functions were added to
+ the standard that perform the same basic task, but use a new
+ interface that does not require static data. These functions
+ share their name with the old unsafe functions, but have an
+ "_r" appended to the name. By definition, these functions are
+ reentrant and thread-safe. It is important to note that these
+ functions to do not depend on <pthread.h> and can be used even
+ if threading is not supported.
+
+2.1 User and terminal identification:
+
+ getlogin_r <implemented>
+ ctermid <implemented> (1)
+ ttyname_r <required> <---
+
+ 1. ctermid is a special case. The signature has not changed, but a
+ requirement has been added that its parameter point to a structure
+ of exactly L_ctermid bytes.
+
+2.2 Directory searching
+
+ readdir_r <required> <---
+
+2.3 String token
+
+ strtok_r <implemented>
+
+2.4 Time representation
+
+ asctime_r <implemented>
+ ctime_r <implemented>
+ gmtime_r <implemented>
+ localtime_r <implemented>
+
+2.5 Random number generation
+
+ rand_r <required> <---
+
+2.6 Group and user database
+
+ getgrgid_r <required> <---
+ getgrnam_r <required> <---
+ getpwuid_r <implemented>
+ getpwnam_r <implemented>
+
+2.7 Additional thread-safe functions implemented by glibc
+
+ The following is a list of additional functions implemented by glibc
+ that also provide thread-safe functionality. Most of these functions
+ are not supported by uClibc, so there is no need to implement the
+ thread-safe version. Those that do apply, but have not been
+ implemented yet are highlighted.
+
+ __fgetpwent_r <not supported>
+ fgetpwent_r <implemented>
+ __ttyname_r <not supported>
+ getttyname_r <not supported>
+ __getmntent_r <not supported>
+ getmntent_r <desired> <---
+ ecvt_r <not supported>
+ fcvt_r <not supported>
+ qecvt_r <not supported>
+ qfcvt_r <not supported>
+ hcreate_r <not supported>
+ hdestroy_r <not supported>
+ hsearch_r <not supported>
+ __getspent_r <not supported>
+ getspent_r <not supported>
+ __getspnam_r <not supported>
+ getspnam_r <not supported>
+ __sgetspent_r <not supported>
+ sgetspent_r <not supported>
+ __fgetspent_r <not supported>
+ fgetspent_r <not supported>
+ __gethostbyaddr_r <not supported>
+ gethostbyaddr_r <desired> <---
+ __gethostbyname2_r <not supported>
+ gethostbyname2_r <not supported>
+ __gethostbyname_r <not supported>
+ gethostbyname_r <desired> <---
+ __gethostent_r <not supported
+ gethostent_r <not supported>
+ __getnetbyaddr_r <not supported>
+ getnetbyaddr_r <desired> <---
+ __getnetent_r <not supported>
+ getnetent_r <desired> <---
+ __getnetbyname_r <not supported>
+ getnetbyname_r <desired> <---
+ __getprotobynumber_r <not supported>
+ getprotobynumber_r <desired> <---
+ __getprotoent_r <not supported>
+ getprotoent_r <desired> <---
+ __getprotobyname_r <not supported>
+ getprotobyname_r <desired> <---
+ __getservbyname_r <not supported>
+ getservbyname_r <desired> <---
+ __getservbyport_r <not supported>
+ getservbyport_r <desired> <---
+ __getservent_r <not supported>
+ getservent_r <desired> <---
+ __getrpcent_r <not supported>
+ getrpcent_r <desired> <---
+ __getrpcbyname_r <not supported>
+ getrpcbyname_r <desired> <---
+ __getrpcbynumber_r <not supported>
+ getrpcbynumber_r <desired> <---
+ ether_aton_r <not supported>
+ ether_ntoa_r <not supported>
+ __getnetgrent_r <not supported>
+ __internal_getnetgrent_r <not supported>
+ getnetgrent_r <not supported>
+ __getaliasent_r <not supported>
+ getaliasent_r <not supported>
+ __getaliasbyname_r <not supported>
+ getaliasbyname_r <not supported>
+ __nscd_getpwnam_r <not supported>
+ __nscd_getpwuid_r <not supported>
+ nscd_getpw_r <not supported>
+ __nscd_getgrgid_r <not supported>
+ __nscd_getgrnam_r <not supported>
+ nscd_getgr_r <not supported>
+ __nscd_gethostbyaddr_r <not supported>
+ __nscd_gethostbyname2_r <not supported>
+ __nscd_gethostbyname_r <not supported>
+ nscd_gethst_r <not supported>
+ __getutent_r <desired> <---
+ getutent_r <desired> <---
+ getutent_r_unknown <not supported>
+ getutid_r_unknown <not supported>
+ getutline_r_unknown <not supported>
+ __getutid_r <not supported>
+ getutid_r <desired> <---
+ __getutline_r <not supported>
+ getutline_r <required> <---
+ getutent_r_file <not supported>
+ getutid_r_file <not supported>
+ getutline_r_file <not supported>
+ internal_getut_r <not supported>
+ getutent_r_daemon <not supported>
+ getutid_r_daemon <not supported>
+ getutline_r_daemon <not supported>
+ __ptsname_r <not supported>
+ ptsname_r <not supported>
+
+
+2.8 Additional thread-safe functions implemented by Proventhreads
+
+ See description above. This applies only to the C library included
+ in the proventhreads distribution.
+
+ inet_ntoa_r <desired> <---
+ gethostbyaddr_r <desired> <---
+ gethostbyname_r <desired> <---
+ gethostent_r <not supported>
+ getnetbyaddr_r <desired> <---
+ getnetbyname_r <desired> <---
+ getnetent_r <desired> <---
+ getprotobynumber_r <desired> <---
+ getprotoent_r <desired> <---
+ getprotobyname_r <desired> <---
+ getservbyname_r <desired> <---
+ getservbyport_r <desired> <---
+ getservent_r <desired> <---
+
+
+3. List of functions in uClibc that use static data structures
+
+ The following is a list of static data structures found in uClibc,
+ and the functions that use them. In most cases, static data is not
+ thread-safe, since multiple threads can access the same data at the
+ same time. This is an attempt to identify all of the static data that
+ is not considered thread-safe. Some of these problems will get
+ resolved by the changes outlines above.
+
+ crypt/crypt.c:
+
+ static struct crypt_data __crypt_data;
+
+ crypt <crypt_r implemented>
+ setkey <setkey_r implemented>
+ encrypt <encrypt_r implemented>
+
+ --------------------------------------------------------------------
+
+ crypt/md5.c:
+
+ static unsigned char PADDING[64] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ inet/addr.c:
+
+ static char buf[16];
+
+ inet_ntoa <inet_ntoa_r not implemented> <---
+
+ --------------------------------------------------------------------
+
+ inet/getnetent.c:
+
+ static FILE *netf = NULL;
+ static char line[BUFSIZ+1];
+ static struct netent net;
+ static char *net_aliases[MAXALIASES];
+
+ setnetent <fix required> <---
+ endnetent <fix required> <---
+ getnetent <getnetent_r required> <---
+
+ NOTE: setnetent and endnetent are not implemented in glibc.
+ Proventhreads uses pthread mutexes to protect this static data.
+
+ --------------------------------------------------------------------
+
+ inet/getproto.c:
+
+ static FILE *protof = NULL;
+ static char line[BUFSIZ+1];
+ static struct protoent proto;
+ static char *proto_aliases[MAXALIASES];
+ static int proto_stayopen;
+
+ setprotoent <fix required> <---
+ endprotoent <fix required> <---
+ getprotoent <getprotoent_r required> <---
+ getprotobyname <getprotobyname_r required> <---
+ getprotobynumber <getprotobynumber required> <---
+
+ NOTE: setprotoent and endprotoent are not implemented in glibc.
+ Proventhreads uses pthread mutexes to protect this static data.
+
+ --------------------------------------------------------------------
+
+ inet/getservice.c:
+
+ static FILE *servf = NULL;
+ static char line[BUFSIZ+1];
+ static struct servent serv;
+ static char *serv_aliases[MAXALIASES];
+ static int serv_stayopen;
+
+ setservent <fix required> <---
+ endservent <fix required> <---
+ getservent <getservent_r required> <---
+ getservbyname <getservbyname_r required> <---
+ getservbyport <getservbyport_r required> <---
+
+ NOTE: setservent and endservent are not implemented in glibc.
+ Proventhreads uses pthread mutexes to protect this static data.
+
+ --------------------------------------------------------------------
+
+ net/resolv.c:
+
+ static int id = 1;
+ static int ns = 0;
+
+ dns_lookup <fix required> <---
+
+ NOTE: dns_lookup is not implemented by glibc or Proventhreads.
+
+ static struct hostent h;
+ static char namebuf[256];
+ static struct in_addr in;
+ static struct in_addr *addr_list[2];
+
+ gethostbyname <gethostbyname_r required> <---
+
+ static struct hostent h;
+ static char namebuf[256];
+ static struct in_addr in;
+ static struct in_addr *addr_list[2];
+
+ gethostbyaddr <gethostbyaddr_r required> <---
+
+ static struct hostent h;
+ static struct in_addr in;
+ static struct in_addr *addr_list[2];
+ static char line[80];
+
+ read_etc_hosts <fix required> <---
+
+ NOTE: dns_lookup is not implemented by glibc or Proventhreads.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/auth_none.c:
+
+ static struct auth_ops ops
+ static struct authnone_private
+
+ authnone_create <fix required> <---
+ authnone_marshal <fix required> <---
+
+ NOTE: This file makes a lot of use of this static variable and
+ also a global allocated authentication structure. Care should
+ be taken in fixing this to make it thread-safe.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/auth_unix.c:
+
+ static struct auth_ops auth_unix_ops
+
+ authunix_create <fix required> <---
+ marshal_new_auth <fix required> <---
+
+ NOTE: This file makes a lot of use of this static variable and
+ also a global allocated authentication structure. Care should
+ be taken in fixing this to make it thread-safe.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/bindresvport.c:
+
+ static short port;
+
+ bindresvport <fix required> <---
+
+ --------------------------------------------------------------------
+
+ inet/rpc/clnt_perror.c:
+
+ static char *buf;
+ static struct rpc_errtab rpc_errlist[]
+ static struct auth_errtab auth_errlist[]
+
+ NOTE: These static structures all have #if 0 around them, so they
+ do not get compiled in. Hopefully, we don't have to worry about
+ them right now, but prehaps a comment should be added to the code
+ indicating that it is not thread-safe.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/clnt_raw.c:
+
+ static struct clntraw_private
+ static struct clnt_ops client_ops
+
+ clntraw_create <fix required> <---
+ clntraw_call <fix required> <---
+ clntraw_freeres <fix required> <---
+
+ NOTE: This file makes a lot of use of these static variables and
+ also a global allocated client structure. Care should
+ be taken in fixing this to make it thread-safe.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/clnt_simple.c:
+
+ static struct callrpc_private
+
+ callrpc <fix required> <---
+
+ --------------------------------------------------------------------
+
+ inet/rpc/clnt_tcp.c:
+
+ static struct clnt_ops tcp_ops
+
+ clnttcp_create
+
+ NOTE: This static structure is just a group of function pointers.
+ It could probably be made const, but this might affect the function
+ signature. This should be investigated further.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/clnt_udp.c:
+
+ static struct clnt_ops udp_ops
+
+ clntudp_bufcreate
+
+ NOTE: This static structure is just a group of function pointers.
+ It could probably be made const, but this might affect the function
+ signature. This should be investigated further.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/getrpcent.c:
+
+ static char RPCDB[] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/pmap_clnt.c:
+
+ static struct timeval timeout <fix desired> <---
+ static struct timeval tottimeout <fix desired> <---
+
+ NOTE: These are okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/pmap_getport.c:
+
+ static struct timeval timeout <fix desired> <---
+ static struct timeval tottimeout <fix desired> <---
+
+ NOTE: These are okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/pmap_rmt.c:
+
+ static struct timeval timeout <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/rpc_dtablesize.c:
+
+ static int size;
+
+ _rpc_dtablesize <fix required> <---
+
+ --------------------------------------------------------------------
+
+ inet/rpc/rpc_prot.c:
+
+ static struct xdr_discrim reply_dscrm[3] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/svc.c:
+
+ static SVCXPRT **xports;
+ static SVCXPRT *xports[NOFILE];
+ static struct svc_callout
+
+ xprt_register <fix required> <---
+ xprt_unregister <fix required> <---
+ svc_getreqset <fix required> <---
+ svc_register <fix required> <---
+ svc_unregister <fix required> <---
+ svc_callout <fix required> <---
+
+ NOTE: This is intricate code, and care should be taken when making
+ this thread-safe.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/svc_auth.c:
+
+ static struct svcauthsw <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ net/rpc/svc_raw.c:
+
+ static struct svcraw_private
+ static struct xp_ops server_ops
+
+ svcraw_create <fix required> <---
+ svcraw_recv <fix required> <---
+ svcraw_reply <fix required> <---
+ svcraw_getargs <fix required> <---
+ svcraw_freeargs <fix required> <---
+
+ NOTE: This is intricate code, and care should be taken when making
+ this thread-safe.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/svc_simple.c:
+
+ static struct proglst
+ static SVCXPRT *transp;
+
+ registerrpc <fix required> <---
+ universal <fix required> <---
+
+ NOTE: This is intricate code, and care should be taken when making
+ this thread-safe.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/svc_tcp.c:
+
+ static struct xp_ops svctcp_op
+ static struct xp_ops svctcp_rendezvous_op
+
+ svctcp_create <fix required> <---
+ makefd_xprt <fix required> <---
+
+ NOTE: This static structure is just a group of function pointers.
+ It could probably be made const, but this might affect the function
+ signature. This should be investigated further.
+
+ static struct timeval wait_per_try
+
+ readtcp <fix required> <---
+
+ NOTE: This looks like a bug. This static timeout value is passed
+ by reference to a select() call. According to the linux man page
+ for select:
+
+ "On Linux, timeout is modified to reflect the amount of
+ time not slept; most other implementations do not do this.
+ This causes problems both when Linux code which reads
+ timeout is ported to other operating systems, and when
+ code is ported to Linux that reuses a struct timeval for
+ multiple selects in a loop without reinitializing it.
+ Consider timeout to be undefined after select returns."
+
+ Unless the implementation of select is different than that of Linux,
+ this needs to be fixed!
+
+ --------------------------------------------------------------------
+
+ inet/rpc/svc_udp.c:
+
+ static struct xp_ops svcudp_op <fix desired> (1)
+
+ svcudp_bufcreate
+
+ 1: This static structure is just a group of function pointers.
+ It could probably be made const, but this might affect the function
+ signature. This should be investigated further.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/xdr.c:
+
+ static char xdr_zero[BYTES_PER_XDR_UNIT] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ static u_long crud[BYTES_PER_XDR_UNIT]
+
+ NOTE: This looks like it doesn't matter what's in this array.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/xdr_float.c:
+
+ static struct sgl_limits <fix desired> <---
+ static struct dbl_limits <fix desired> <---
+
+ NOTE: These are okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/xdr_mem.c:
+
+ static struct xdr_ops xdrmem_ops <fix desired> (1)
+
+ xdrmem_create
+
+ 1: This static structure is just a group of function pointers.
+ It could probably be made const, but this might affect the function
+ signature. This should be investigated further.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/xdr_rec.c:
+
+ static struct xdr_ops xdrrec_ops <fix desired> (1)
+
+ xdrrec_create
+
+ 1: This static structure is just a group of function pointers.
+ It could probably be made const, but this might affect the function
+ signature. This should be investigated further.
+
+ --------------------------------------------------------------------
+
+ inet/rpc/xdr_stdio.c:
+
+ static struct xdr_ops xdrstdio_ops <fix desired> (1)
+
+ xdrstdio_create
+
+ 1: This static structure is just a group of function pointers.
+ It could probably be made const, but this might affect the function
+ signature. This should be investigated further.
+
+ --------------------------------------------------------------------
+
+ ld.so-1/d-link/boot1.c:
+
+ static char *_dl_malloc_addr
+ static char *_dl_mmap_zero
+ static char *_dl_not_lazy
+ static char *_dl_warn
+ static char *_dl_trace_loaded_objects
+
+ _dl_boot <fix required> <---
+ _dl_malloc <fix required> <---
+ _dl_fixup <fix required> <---
+
+ These are all part of the shared library loader, and are not
+ used by applications directly. Therefore, fixing these is not
+ a high priority item.
+
+ --------------------------------------------------------------------
+
+ ld.so-1/d-link/readelflib1.c:
+
+ static caddr_t _dl_cache_addr
+ static size_t _dl_cache_size
+
+ _dl_map_cache <fix required> <---
+ _dl_unmap_cache <fix required> <---
+ _dl_load_shared_library <fix required> <---
+
+ These are all part of the shared library loader, and are not
+ used by applications directly. Therefore, fixing these is not
+ a high priority item.
+
+ --------------------------------------------------------------------
+
+ ld.so-1/d-link/string.h:
+
+ static char local[22]
+
+ _dl_simple_ltoa <fix required> <---
+ _dl_simple_ltoahex <fix required> <---
+
+ These are all part of the shared library loader, and are not
+ used by applications directly. Therefore, fixing these is not
+ a high priority item.
+
+ --------------------------------------------------------------------
+
+ ld.so-1/d-link/arm/elfinterp.c:
+
+ static char *_dl_reltypes[] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ ld.so-1/d-link/i386/elfinterp.c:
+
+ static char *_dl_reltypes[] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ These are all part of the shared library loader, and are not
+ used by applications directly. Therefore, fixing these is not
+ a high priority item.
+
+ --------------------------------------------------------------------
+
+ ld.so-1/d-link/m68k/elfinterp.c:
+
+ static char *_dl_reltypes[] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ These are all part of the shared library loader, and are not
+ used by applications directly. Therefore, fixing these is not
+ a high priority item.
+
+ --------------------------------------------------------------------
+
+ ld.so-1/d-link/sparc/elfinterp.c:
+
+ static char *_dl_reltypes[] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ These are all part of the shared library loader, and are not
+ used by applications directly. Therefore, fixing these is not
+ a high priority item.
+
+ --------------------------------------------------------------------
+
+ ld.so-1/libdl/dlib.c:
+
+ static int dl_init
+
+ _dlopen <fix required> <---
+
+ static int __attribute__ ((unused)) foobar1 <fix required?> (1)
+
+ NOTE: The comment for this says it all: "This is a real hack." ;-)
+
+
+ static char *type[] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ These are all part of the shared library loader, and are not
+ used by applications directly. Therefore, fixing these is not
+ a high priority item.
+
+ --------------------------------------------------------------------
+
+ ld.so-1/util/ldconfig.c:
+
+ static header_t magic <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ static liblist_t *lib_head
+
+ cache_dolib <fix required> <---
+ cache_write <fix required> <---
+
+ This is not actually part of the C library, and is not built by
+ default, so fixing these is not a high priority item.
+
+ --------------------------------------------------------------------
+
+ misc/internals/tempname.c:
+
+ static uint64_t value;
+
+ __gen_tempname <fix required> <---
+
+ --------------------------------------------------------------------
+
+ misc/locale/locale.c:
+
+ static char C_LOCALE_NAME[]="C"; <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ static struct SAV_LOADED_LOCALE sav_loaded_locale [1]
+ static struct SAV_LOADED_LOCALE * old_locale
+
+ setlocale <fix required> <---
+
+ NOTE: Can different threads use different locales? I don't see
+ why not.
+
+ --------------------------------------------------------------------
+
+ misc/locale/localeconv.c:
+
+ static struct lconv result;
+
+ localeconv <fix required> <---
+
+ NOTE: This function returns a pointer to a static data structure.
+
+ static char *blank = ""; <fix desired> <---
+ static char *decimal = "."; <fix desired> <---
+
+ NOTE: These are okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ misc/mntent/mntent.c:
+
+ static char buff[MNTMAXSTR];
+ static struct mntent mnt;
+
+ getmntent <getmntent_r required> <---
+
+ --------------------------------------------------------------------
+
+ misc/regex/regex.c:
+
+ static char re_syntax_table[CHAR_SET_SIZE];
+ static int done = 0;
+
+ init_syntax_table <fix required> <---
+
+ static int debug;
+
+ <several functions> <fix required> <---
+
+ NOTE: This is used to turn on debugging, and is used in several
+ functions. It will need to be fixed if you want differing debug
+ levels per thread.
+
+ static char reg_unset_dummy;
+
+ <REG_UNSET...> <fix required> <---
+
+ static fail_stack_type fail_stack;
+
+ regex_compile <fix required> <---
+ <FREE_VARIABLES> <fix required> <---
+ <FAIL_STACK_EMPTY> <fix required> <---
+ <FAIL_STACK_PTR_EMPTY> <fix required> <---
+ <FAIL_STACK_FULL> <fix required> <---
+ <INIT_FAIL_STACK> <fix required> <---
+ <RESET_FAIL_STACK> <fix required> <---
+ <DOUBLE_FAIL_STACK> <fix required> <---
+ <PUSH_FAILURE_POINTER> <fix required> <---
+ <PUSH_FAILURE_INT> <fix required> <---
+ <PUSH_FAILURE_ELT> <fix required> <---
+ <POP_FAILURE_POINTER> <fix required> <---
+ <POP_FAILURE_INT> <fix required> <---
+ <POP_FAILURE_ELT> <fix required> <---
+ <REMAINING_AVAIL_SLOTS> <fix required> <---
+
+ static int regs_allocated_size;
+
+ regs_grow_registers <fix required> <---
+
+ static register_info_type *reg_info;
+ static register_info_type *reg_info_dummy;
+ static unsigned failure_id;
+ static struct re_pattern_buffer re_comp_buf;
+
+ <too many to list> <fix required> <---
+
+ NOTE: This is just a NASTY file for static variables. A lot of
+ work needs to be done here to clean this up. But I'm not even
+ sure if it matters. This code is taken directly from glibc.
+
+ This code is also very large (adds over 30k to the C library
+ all by itself). This file needs a complete rewrite.
+
+ --------------------------------------------------------------------
+
+ misc/syslog/syslog.c:
+
+ static pthread_once__t _once_block = pthread_once_init;
+ static pthread_mutex_t _syslog_mutex;
+
+ NOTE: I think these are okay. ;-)
+
+ static int LogFile = -1;
+ static int connected;
+ static int LogStat = 0;
+ static int LogFacility = LOG_USER;
+ static int LogMask = 0xff;
+ static char truncate_msg[12]
+ static struct sockaddr SyslogAddr;
+
+ NOTE: These are already protected.
+
+ --------------------------------------------------------------------
+
+ misc/time/asctime.c:
+
+ static char timebuf[26];
+
+ asctime <asctime_r implemented>
+
+ --------------------------------------------------------------------
+
+ misc/time/ctime.c:
+
+ static char cbuf[26];
+
+ ctime <ctime_r implemented>
+
+ --------------------------------------------------------------------
+
+ misc/time/gmtime.c:
+
+ static struct tm tmb;
+
+ gmtime <gmtime_r implemented>
+
+ --------------------------------------------------------------------
+
+ misc/time/localtime.c:
+
+ static struct tm tmb;
+
+ localtime <localtime_r implemented>
+
+ --------------------------------------------------------------------
+
+ misc/time/mktime.c:
+
+ static tz_rule tz_rules[2];
+
+ tzset <fix required> <---
+
+ static time_t localtime_offset;
+
+ mktime <fix required> <---
+
+ --------------------------------------------------------------------
+
+ misc/time/tm_conv.c:
+
+ static int moffset[] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ misc/utmp/utent.c:
+
+ static int ut_fd = -1;
+
+ setutent <fix required> <---
+ endutent <fix required> <---
+ getutent <fix required> <---
+ getutid <fix required> <---
+ getutline <fix required> <---
+ pututline <fix required> <---
+ utmpname <fix required> <---
+
+ static struct utmp utmp;
+
+ __getutent <fix required> <---
+
+ --------------------------------------------------------------------
+
+ pwd_grp/__getgrent.c:
+
+ static char line_buff[GR_MAX_LINE_LEN];
+ static char *members[GR_MAX_MEMBERS];
+ static char *line_buff = NULL;
+ static char **members = NULL;
+ static struct group group;
+
+ __getgrent <fix required> <---
+
+ --------------------------------------------------------------------
+
+ pwd_grp/fgetpwent.c:
+
+ static char line_buff[PWD_BUFFER_SIZE];
+ static struct passwd pwd;
+
+ fgetpwent <fgetpwent_r implemented>
+
+ --------------------------------------------------------------------
+
+ pwd_grp/getpwnam.c:
+
+ static char line_buff[PWD_BUFFER_SIZE];
+ static struct passwd pwd;
+
+ getpwnam <getpwnam_r implemented>
+
+ --------------------------------------------------------------------
+
+ pwd_grp/getpwuid.c:
+
+ static char line_buff[PWD_BUFFER_SIZE];
+ static struct passwd pwd;
+
+ getpwuid <getpwuid_r implemented>
+
+ --------------------------------------------------------------------
+
+ pwd_grp/grent.c:
+
+ static int grp_fd = -1;
+
+ setgrent <fix required> <---
+ endgrent <fix required> <---
+ getgrent <fix required> <---
+
+ --------------------------------------------------------------------
+
+ pwd_grp/pwent.c:
+
+ static int pw_fd = -1;
+
+ setpwent <fix required> <---
+ endpwent <fix required> <---
+ getpwent_r <fix required> <---
+
+ NOTE: Yeah, this looks weird, but getpwent_r isn't completely
+ thread-safe.
+
+ static char line_buff[PWD_BUFFER_SIZE];
+ static struct passwd pwd;
+
+ getpwent <getpwent_r implemented> <---
+
+ --------------------------------------------------------------------
+
+ stdio/tmpnam.c:
+
+ static char tmpnam_buffer[L_tmpnam];
+
+ tmpnam <tmpnam_r implemented>
+
+ --------------------------------------------------------------------
+
+ stdlib/atexit.c:
+
+ static vfuncp __atexit_table[__UCLIBC_MAX_ATEXIT];
+ static int __atexit_count = 0;
+
+ atexit_handler <fix required> <---
+ atexit <fix required> <---
+
+ --------------------------------------------------------------------
+
+ stdlib/bsearch.c:
+
+ static int _bsearch;
+
+ bsearch <fix required> <---
+
+ --------------------------------------------------------------------
+
+ stdlib/putenv.c:
+
+ static char **mall_env = 0;
+ static int extras = 0;
+
+ putenv <fix required> <---
+
+ --------------------------------------------------------------------
+
+ stdlib/random.c:
+
+ static long int seed1 = 1;
+ static long int seed2 = 1;
+ static long int seed3 = 1;
+
+ random <fix required?> (1)
+ srandom <fix required?> (1)
+
+ 1: I'm not sure if it matters if these are static, since they
+ are random number seeds. Who cares if more than one thread changes
+ their value?
+
+ --------------------------------------------------------------------
+
+ stdlib/setenv.c:
+
+ static pthread_once__t _once_block = pthread_once_init; (1)
+ static pthread_mutex_t _setenv_mutex; (1)
+ static char **last_environ = NULL; (1)
+
+ 1: Obviously, nothing to do here. (Unless I change the way we
+ deal with threads).
+
+ --------------------------------------------------------------------
+
+ stdlib/malloc/avlmacro.h
+
+ static objname *__Avl_##objname##pr##_new_node;
+
+ Avl_Tree_no_replace <fix required> <---
+
+ NOTE: This will take a bit of study to figure out if it needs fixing.
+
+ --------------------------------------------------------------------
+
+ stdlib/malloc/malloc.c:
+
+ //static mutex_t malloc_lock = MUTEX_INITIALIZER; <---
+
+ NOTE: Basically, thread support in malloc is broken and must be
+ fixed. It looks like the infrastructure is there, but more
+ investigation is required.
+
+ --------------------------------------------------------------------
+
+ stdlib/malloc-930716/malloc.c:
+
+ static int heapsize;
+ static int initialized;
+ static size_t pagesize;
+
+ inititalize <fix required> <---
+ morecore <fix required> <---
+ malloc <fix required> <---
+
+ --------------------------------------------------------------------
+
+ stdlib/malloc-930716/valloc.c:
+
+ static size_t pagesize;
+
+ valloc <fix required> <---
+
+ --------------------------------------------------------------------
+
+ string/config.c:
+
+ static char *args[16];
+ static char cfgbuf[128];
+
+ cfgread <fix required> <---
+
+ --------------------------------------------------------------------
+
+ string/strerror.c:
+
+ static char retbuf[48];
+ static char retbuf[33];
+
+ strerror <fix required> <---
+ main <fix required> <---
+
+ --------------------------------------------------------------------
+
+ string/strsignal.c:
+
+ static char retbuf[28];
+
+ strsignal <fix required> <---
+ main <fix required> <---
+
+ --------------------------------------------------------------------
+
+ string/strtok.c:
+
+ static char *save = 0;
+
+ strtok <strtok_r implemented> <---
+
+ --------------------------------------------------------------------
+
+ sysdeps/linux/common/kernel_version.c:
+
+ static int __linux_kernel_version = -1;
+
+ __get_linux_kernel_version <fix required> (1)
+
+ 1: This static value never actually gets updated! This a bug.
+
+ --------------------------------------------------------------------
+
+ sysdeps/linux/i386/bits/huge_val.h:
+
+ static __huge_val_t __huge_val <fix desired> <---
+ static __huge_valf_t __huge_valf <fix desired> <---
+ static __huge_vall_t __huge_vall <fix desired> <---
+
+ NOTE: These are okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ sysdeps/linux/i386/bits/nan.h:
+
+ static union { ... } __nan_union <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ sysdeps/linux/m68k/bits/huge_val.h:
+
+ static union { ... } __huge_val <fix desired> <---
+ static union { ... } __huge_valf <fix desired> <---
+ static union { ... } __huge_vall <fix desired> <---
+
+ NOTE: These are okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ sysdeps/linux/m68k/bits/nan.h:
+
+ static union { ... } __nan_union <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ sysdeps/linux/sh/bits/huge_val.h:
+
+ static __huge_val_t __huge_val <fix desired> <---
+ static __huge_valf_t __huge_valf <fix desired> <---
+
+ NOTE: These are okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ sysdeps/linux/sh/bits/nan.h:
+
+ static union { ... } __nan_union <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ sysdeps/linux/sparc/bits/huge_val.h:
+
+ static __huge_val_t __huge_val <fix desired> <---
+ static __huge_valf_t __huge_valf <fix desired> <---
+
+ NOTE: These are okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ sysdeps/linux/sparc/bits/nan.h:
+
+ static union { ... } __nan_union <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ termios/tcgetsid.c:
+
+ static int tiocgsid_does_not_work;
+
+ tcgestsid <fix required> <---
+
+ --------------------------------------------------------------------
+
+ termios/ttyname.c:
+
+ static char dev[] = "/dev";
+
+ ttyname <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ static char name[NAME_MAX];
+
+ ttyname <ttyname_r required> <---
+
+ --------------------------------------------------------------------
+
+ test/testsuite.h:
+
+ static int failures
+
+ error_msg <fix required> <---
+ done_testing <fix required> <---
+ init_testsuite <fix required> <---
+
+ --------------------------------------------------------------------
+
+ unistd/getcwd.c:
+
+ static char *path_buf;
+ static int path_size;
+ static dev_t root_dev;
+ static ino_t root_ino;
+ static struct stat st;
+
+ getswd <fix required> <---
+ recurser <fix required> <---
+ search_dir <fix required> <---
+
+ --------------------------------------------------------------------
+
+ unistd/getopt.c:
+
+ static int sp = 1;
+
+ getopt <fix required> <---
+
+ --------------------------------------------------------------------
+
+ unistd/getpass.c:
+
+ static char buf[PWD_BUFFER_SIZE];
+
+ getpass <fix required> <---
+
+ NOTE: This function returns a pointer to a static data structure.
+ This seems like it requires an _r version of this function. Glibc
+ does the same thing. Oops! So much for thread-safe glibc!
+
+ --------------------------------------------------------------------
+
+ unistd/gnu_getopt.c:
+
+ static char *nextchar;
+ static enum ordering;
+ static int first_nonopt;
+ static int last_nonopt;
+
+ _getopt_initialize <fix required> <---
+ _getopt_internal <fix required> <---
+ exchange <fix required> <---
+
+ static struct option long_options[] <fix desired> <---
+
+ NOTE: This is okay, but should use the const keyword.
+
+ --------------------------------------------------------------------
+
+ unistd/sysconf.c:
+
+ static long int ret_vals[_UCLIBC_SYSCONF_NUM_VALID_ARGS];
+
+ find_or_add_in_table <fix required?> <---
+ main <fix required?> <---
+
+ NOTE: I'm not sure if this needs to be multi-threaded or not.
+
+ --------------------------------------------------------------------
+
+ unistd/sysconf_src.c:
+
+ static long int ret_vals[_UCLIBC_SYSCONF_NUM_VALID_ARGS];
+
+ find_or_add_in_table <fix required?> <---
+ main <fix required?> <---
+
+ NOTE: I'm not sure if this needs to be multi-threaded or not.
+
+ --------------------------------------------------------------------
+
+ unistd/sysconf_i386.c:
+
+ static long int ret_vals[_UCLIBC_SYSCONF_NUM_VALID_ARGS];
+
+ find_or_add_in_table <fix required?> <---
+ main <fix required?> <---
+
+ NOTE: I'm not sure if this needs to be multi-threaded or not.
+
+ --------------------------------------------------------------------
+
+
+4. List of functions that use global variables
+
+ The following is a list of functions that make use of global
+ variables. Since multiple threads can access the same global
+ variable at the same time, access should be considered unsafe.
+ This is an attempt to identify all the areas where global
+ variables are used. This does not necessarily mean that each
+ of these is unsafe. It just means that there is a potential
+ for them to be unsafe. If this code never runs in more than
+ one thread, then there's no problem. More ivestigation will be
+ required to determine if changes are really required.
+
+ Global variable:
+
+ __environ (misc/internals/__uClibc_main.c)
+
+ __uClibc_main.c:
+
+ __uClibc_main <fix required?> (1)
+
+ 1: This should only get executed once, so it is probably fine.
+
+ stdlib/getenv.c:
+
+ getenv <fix required> <---
+
+ stdlib/putenv.c:
+
+ putenv <fix required> <---
+
+ stdlib/setenv.c:
+
+ setenv <fix required> <---
+ unsetenv <fix required> <---
+
+ test/args/arg_test.c:
+
+ main <fix required> <---
+
+ unistd/execl.c:
+
+ execl <fix required> <---
+
+ unistd/execlp.c:
+
+ execlp <fix required> <---
+
+ unistd/execv.c:
+
+ execv <fix required> <---
+
+ unistd/execvp.c:
+
+ execvep <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ __uClibc_cleanup (misc/internals/__uClibc_main.c)
+
+ stdlib/abort.c:
+
+ abort <fix required> <---
+
+ stdlib/atexit.c:
+
+ atexit_handler <fix required> <---
+ atexit <fix required> <---
+ exit <fix required> <---
+
+ NOTE: Not sure if multiple threads can be in this code or not.
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ environ (misc/internals/__uClibc_main.c)
+
+ NOTE: This is a weak alias for __environ, but it doesn't ever get
+ used in the uClibc library.
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ timezone (misc/time/tm_conv.c)
+
+ misc/time/tm_conv.c:
+
+ __tm_conv <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ re_max_failures (misc/regex/regex.c)
+
+ misc/regex/regex.c:
+
+ DOUBLE_FAIL_STACK <fix required> <---
+ regex_compile <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ re_syntax_options (misc/regex/regex.c)
+
+ misc/regex/regex.c:
+
+ re_set_syntax <fix required> <---
+ re_compile_pattern <fix required> <---
+ re_comp <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ __IO_list (stdio/stdio.c)
+
+ stdio/stdio.c:
+
+ fflush <fix required> <---
+ __fopen <fix required> <---
+ fclose <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ _fixed_buffers (stdio/stdio.c)
+
+ stdio/stdio.c:
+
+ _alloc_stdio_buffer <fix required> <---
+ _free_stdio_buffer_of_file <fix required> <---
+ __init_stdio <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ _free_buffer_index (stdio/stdio.c)
+
+ stdio/stdio.c:
+
+ _alloc_stdio_buffer <fix required> <---
+ _free_stdio_buffer_of_file <fix required> <---
+ __init_stdio <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ _free_file_list (stdio/stdio.c)
+
+ stdio/stdio.c:
+
+ __init_stdio <fix required> <---
+ _alloc_stdio_stream <fix required> <---
+ _free_stdio_stream <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ _stderr (stdio/stdio.c)
+
+ ld.so-1/util/ldconfig.c:
+
+ warn <fix required> <---
+ error <fix required> <---
+ usage <fix required> <---
+
+ ld.so-1/util/ldd.c:
+
+ warn <fix required> <---
+ error <fix required> <---
+ is_bin <fix required> <---
+ main <fix required> <---
+
+ misc/locale/locale.c:
+
+ setlocale <fix required> <---
+
+ misc/regex/regex.c:
+
+ printchar <fix required> <---
+
+ stdio/perror.c:
+
+ perror <fix required> <---
+
+ stdlib/malloc/alloc.c:
+
+ calloc_dbg <fix required> <---
+ malloc_dbg <fix required> <---
+ free_dbg <fix required> <---
+
+ stdlib/malloc/malloc.c:
+
+ __hunk_alloc <fix required?> (1)
+ __malloc_init <fix required?> (1)
+ malloc <fix required?> (1)
+
+ 1: These are commented out with C++ style comments.
+
+ stdlib/malloc-simple/alloc.c:
+
+ calloc_dbg <fix required> <---
+ malloc_dbg <fix required> <---
+ free_dbg <fix required> <---
+
+ string/strsignal.c:
+
+ psignal <fix required> <---
+
+ test/args/arg_test.c:
+
+ main <fix required> <---
+
+ test/assert/assert.c:
+
+ main <fix required> <---
+
+ unistd/getopt.c:
+
+ Err <fix required> <---
+
+ unistd/getpass.c:
+
+ getpass <fix required> <---
+
+ unistd/gnu_getopt.c:
+
+ _getopt_internal <fix required> <---
+
+ unistd/sysconf.c:
+
+ main <fix required> <---
+
+ unistd/sysconf_src.c:
+
+ main <fix required> <---
+
+ unistd/sysconf_i386.c:
+
+ main <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ _stdin (stdio/stdio.c)
+
+ include/stdio.h:
+
+ getchar <fix required> <---
+
+ include/bits/stdio.h:
+
+ getchar <fix required> <---
+ getchar_unlocked <fix required> <---
+
+ stdio/scanf.c:
+
+ scanf <fix required> <---
+ vscanf <fix required> <---
+
+ stdio/stdio.c
+
+ gets <fix required> <---
+ getchar <fix required> <---
+
+ sysdeps/linux/i386/bits/stdio.h:
+
+ getchar <fix required> <---
+ getchar_unlocked <fix required> <---
+
+ sysdeps/linux/m68k/bits/stdio.h:
+
+ getchar <fix required> <---
+ getchar_unlocked <fix required> <---
+
+ sysdeps/linux/sh/bits/stdio.h:
+
+ getchar <fix required> <---
+ getchar_unlocked <fix required> <---
+
+ sysdeps/linux/sparc/bits/stdio.h:
+
+ getchar <fix required> <---
+ getchar_unlocked <fix required> <---
+
+ unistd/getpass.c:
+
+ getpass <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ _stdio_streams (stdio/stdio.c)
+
+ stdio/stdio.c:
+
+ __init_stdio <fix required> <---
+ _free_stdio_stream <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ _stdout (stdio/stdio.c)
+
+ include/stdio.h:
+
+ putchar <fix required> <---
+
+ include/bits/stdio.h:
+
+ vprintf <fix required> <---
+ putchar <fix required> <---
+ putchar_unlocked <fix required> <---
+
+ ld.so-1/util/ldconfig.c:
+
+ warn <fix required> <---
+ error <fix required> <---
+
+ ld.so-1/util/ldd.c:
+
+ warn <fix required> <---
+ error <fix required> <---
+ main <fix required> <---
+
+ stdio/printf.c:
+
+ printf <fix required> <---
+ vprintf <fix required> <---
+
+ stdio/stdio.c:
+
+ puts <fix required> <---
+ _uClibc_fread <fix required> <---
+ putchar <fix required> <---
+
+ sysdeps/linux/i386/bits/stdio.h:
+
+ vprintf <fix required> <---
+ putchar <fix required> <---
+ putchar_unlocked <fix required> <---
+
+ sysdeps/linux/m68k/bits/stdio.h:
+
+ vprintf <fix required> <---
+ putchar <fix required> <---
+ putchar_unlocked <fix required> <---
+
+ sysdeps/linux/sh/bits/stdio.h:
+
+ vprintf <fix required> <---
+ putchar <fix required> <---
+ putchar_unlocked <fix required> <---
+
+ sysdeps/linux/sparc/bits/stdio.h:
+
+ vprintf <fix required> <---
+ putchar <fix required> <---
+ putchar_unlocked <fix required> <---
+
+ test/pwd_grp/test_grp.c:
+
+ main <fix required> <---
+
+ test/pwd_grp/test_pwd.c:
+
+ main <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ dns_caught_signal (inet/resolv.c)
+
+ inet/resolv.c:
+
+ dns_catch_signal <fix required> <---
+ dns_lookup <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ nameserver (inet/resolv.c)
+ nameservers (inet/resolv.c)
+
+ inet/resolv.c:
+
+ open_nameservers <fix required> <---
+ close_nameservers <fix required> <---
+ resolve_name <fix required> <---
+ gethostbyname <fix required> <---
+ res_query <fix required> <---
+ gethostbyaddr <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ searchdomain (inet/resolv.c)
+ searchdomains (inet/resolv.c)
+
+ inet/resolv.c:
+
+ dns_lookup <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ _net_stayopen (inet/getnetent.c)
+
+ inet/getnetbyad.c:
+
+ getnetbyaddr <fix required> <---
+
+ inet/getnetbynm.c:
+
+ getnetbyname <fix required> <---
+
+ inet/getnetent.c:
+
+ setnetent <fix required> <---
+ endnetent <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ rpcdata (inet/rpc/getrpcent.c)
+
+ inet/rpc/getrpcent.c:
+
+ _rpcdata <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ _null_auth (inet/rpc/rpc_commondata.c) <fix desired> <---
+
+ NOTE: _null_auth is never actually initialized. It never gets written,
+ only read. So it should be thread safe. But it should be declared
+ as a const if that is the case. It should also be initialized.
+
+ inet/rpc/auth_none.c:
+
+ authnone_create
+
+ inet/rpc/auth_unix.c:
+
+ authunix_create
+
+ inet/rpc/clnt_raw.c:
+
+ clntraw_call
+
+ inet/rpc/clnt_tcp.c:
+
+ clnttcp_call
+
+ inet/rpc/clnt_udp.c:
+
+ clntudp_call
+
+ inet/rpc/pmap_rmt.c:
+
+ clnt_broadcast
+
+ inet/rpc/svc_auth.c:
+
+ _authenticate
+
+ inet/rpc/svc_tcp.c:
+
+ svctcp_create
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ rpc_createerr (inet/rpc/rpc_commondata.c)
+
+ inet/rpc/clnt_generic.c:
+
+ clnt_create <fix required> <---
+
+ inet/rpc/clnt_perror.c:
+
+ clnt_spcreateerror <fix desired?> <---
+
+ NOTE: This piece of code has an "#if 0" around it.
+
+ inet/rpc/clnt_simple.c:
+
+ callrpc <fix required> <---
+
+ inet/rpc/clnt_tcp.c:
+
+ clnttcp_create <fix required> <---
+
+ inet/rpc/clnt_udp.c:
+
+ clntudp_bufcreate <fix required> <---
+
+ inet/rpc/pmap_getport.c:
+
+ pmap_getport <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ svc_fdset (inet/rpc/rpc_commondata.c)
+
+ inet/rpc/svc.c:
+
+ xprt_register <fix required> <---
+ xprt_unregister <fix required> <---
+ svc_getreq <fix required> <---
+
+ inet/rpc/svc_run.c:
+
+ svc_run <fix required> <---
+
+ NOTE: Be careful to also fix the uses of the "svc_fds" #define.
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ pl (inet/rpc/svc_simple.c)
+
+ registerrpc <fix required> <---
+
+ NOTE: proglst is set up to point at pl, so it needs fixing as well.
+ (See proglst earlier in this document.)
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ _sigintr (signal/signal.c)
+
+ signal/bsd_sig.c:
+
+ __bsd_signal <fix required> <---
+
+ signal/sigintr.c:
+
+ siginterrupt <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ __Avl_Block_tfree_mem_tree (stdlib/malloc/malloc.c)
+
+ stdlib/malloc/malloc.c:
+
+ __free_mem_del_block <fix required> <---
+ bl_alloc <fix required> <---
+ __malloc_init <fix required> <---
+
+ NOTE: This code is very tricky stuff.
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ __Avl_Block_tptrs_tree (stdlib/malloc/malloc.c)
+
+ stdlib/malloc/malloc.c:
+
+ __bl_free <fix required> <---
+ __malloc_init <fix required> <---
+ free <fix required> <---
+ _realloc_no_move <fix required> <---
+ realloc <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ __bl_last (stdlib/malloc/malloc.c)
+
+ stdlib/malloc/malloc.c:
+
+ COMBINE_BLOCKS <fix required> <---
+ SPLIT_BLOCK <fix required> <---
+ bl_mapnew <fix required> <---
+ bl_alloc <fix required> <---
+ __malloc_init <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ __free_h (stdlib/malloc/malloc.c)
+
+ stdlib/malloc/malloc.c:
+
+ __hunk_alloc <fix required> <---
+ __hunk_free <fix required> <---
+ __malloc_init <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ __malloc_initialized (stdlib/malloc/malloc.c)
+
+ stdlib/malloc/malloc.c:
+
+ __malloc_init <fix required> <---
+ malloc <fix required> <---
+ free <fix required> <---
+ _realloc_no_move <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ __total_h (stdlib/malloc/malloc.c)
+
+ stdlib/malloc/malloc.c:
+
+ __hunk_alloc <fix required> <---
+ __malloc_init <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ errno (sysdeps/linux/common/errno.c)
+
+ sysdeps/linux/common/errno.c:
+
+ __errno_location <fix required> <---
+
+ NOTE: Obviously, errno gets used all over the place. I won't list
+ them all here.
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ ___brk_addr (sysdeps/linux/i386/__init_brk.c)
+
+ sysdeps/linux/i386/__init_brk.c:
+
+ __init_brk <fix required> <---
+
+ sysdeps/linux/i386/brk.c:
+
+ brk <fix required> <---
+
+ sysdeps/linux/i386/sbrk.c:
+
+ sbrk <fix required> <---
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ optarg (unistd/getopt_vars.c)
+
+ extra/locale/gen_ctype_from_glibc.c:
+
+ main <fix required?> (1)
+
+ ld.so-1/util/ldconfig.c:
+
+ main <fix required?> (1)
+
+ unistd/getopt.c:
+
+ getopt <fix required> <---
+
+ unistd/gnu_getopt.c:
+
+ _getopt_internal <fix required> <---
+ main <fix required?> (1)
+
+ 1: Probably not required unless this program is run on multiple
+ threads.
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ opterr (unistd/getopt_vars.c)
+
+ ld.so-1/util/ldconfig.c:
+
+ main <fix required?> (1)
+
+ unistd/getopt.c:
+
+ Err <fix required> <---
+ getopt <fix required> <---
+
+ unistd/gnu_getopt.c:
+
+ _getopt_internal <fix required> <---
+
+ 1: Probably not required unless this program is run on multiple
+ threads.
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ optind (unistd/getopt_vars.c)
+
+ extra/locale/gen_ctype_from_glibc.c:
+
+ main <fix required?> (1)
+
+ ld.so-1/util/ldconfig.c:
+
+ main <fix required?> (1)
+
+ ld.so-1/util/ldd.c:
+
+ main <fix required?> (1)
+
+ unistd/getopt.c:
+
+ Err <fix required> <---
+ getopt <fix required> <---
+
+ unistd/gnu_getopt.c:
+
+ exchange <fix required> <---
+ _getopt_initialize <fix required> <---
+ _getopt_internal <fix required> <---
+ main <fix required?> (1)
+ main (2nd one) <fix required?> (1)
+
+ 1: Probably not required unless this program is run on multiple
+ threads.
+
+ --------------------------------------------------------------------
+
+ Global variable:
+
+ optopt (unistd/getopt_vars.c)
+
+ unistd/getopt.c:
+
+ Err <fix required> <---
+ getopt <fix required> <---
+
+ unistd/gnu_getopt.c:
+
+ _getopt_internal <fix required> <---
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 08:56:05 +0000