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| -rw-r--r-- | docs/threads.txt | 2169 |
1 files changed, 23 insertions, 2146 deletions
diff --git a/docs/threads.txt b/docs/threads.txt index d31a56d58..4669f3761 100644 --- a/docs/threads.txt +++ b/docs/threads.txt @@ -1,1357 +1,45 @@ uClibc thread-safety analysis -By Steve Thayer <sthayer@coactive.com> -with updates by Erik Andersen <andersee@debian.org> -Introduction: +Things that are still known to be needed for thread safety: -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. + getgrgid_r <not implemented, required by SuSv3> + getgrnam_r <not implemented, required by SuSv3> -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 +Things that might be nice, but are not required: + gethostent_r <desired, but not required for SuSv3> + getnetbyaddr_r <desired, but not required for SuSv3> + getnetent_r <desired, but not required for SuSv3> + getnetbyname_r <desired, but not required for SuSv3> + getprotobynumber_r <desired, but not required for SuSv3> + getprotoent_r <desired, but not required for SuSv3> + getprotobyname_r <desired, but not required for SuSv3> + getnetbyaddr_r <desired, but not required for SuSv3> + getnetbyname_r <desired, but not required for SuSv3> + getnetent_r <desired, but not required for SuSv3> + getprotobynumber_r <desired, but not required for SuSv3> + getprotoent_r <desired, but not required for SuSv3> + getprotobyname_r <desired, but not required for SuSv3> -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. +Functions that use static data and may still need locking: - flockfile <implemented> - ftrylockfile <implemented> - funlockfile <implemented> - -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 <mutex required> - fseek <mutex required> - fseeko <mutex required> - fseeko64 <mutex required> - ftello <mutex required> - ftello64 <mutex required> - fwide <not supported> - getc <mutex required> - getchar <mutex required> - 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 <mutex required> - putchar <mutex required> - 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> - fgetpos64 <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 <mutex required> - getchar <mutex required> - putc <mutex required> - putchar <mutex required> - puts <mutex required> - putw <mutex _not_ required> - 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 <implemented - getchar_unlocked <implemented - putc_unlocked <implemented - putchar_unlocked <implemented - -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 <implemented - clearerr_unlocked <implemented - feof_unlocked <implemented - ferror_unlocked <implemented - fputc_unlocked <implemented - fgetc_unlocked <implemented - fflush_unlocked <implemented - fread_unlocked <implemented - fwrite_unlocked <implemented - fgets_unlocked <implemented - fputs_unlocked <implemented - -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> - ttyname_r <implemented> - - -2.2 Directory searching - - readdir_r <implemented> - -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 <implemented - -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 <implemented> - getttyname_r <not supported> - getmntent_r <implemented> - 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 <implemented> - getspnam_r <implemented> - sgetspent_r <implemented> - fgetspent_r <implemented> - gethostbyaddr_r <implemented> - gethostbyname2_r <implemented> - gethostbyname_r <implemented> - gethostent_r <desired> <--- - getnetbyaddr_r <desired> <--- - getnetent_r <desired> <--- - getnetbyname_r <desired> <--- - getprotobynumber_r <desired> <--- - getprotoent_r <desired> <--- - getprotobyname_r <desired> <--- - getservbyname_r <implemented> - getservbyport_r <implemented> - getservent_r <implemented> - getrpcent_r <desired> <--- - getrpcbyname_r <desired> <--- - getrpcbynumber_r <implemented> - ether_aton_r <not supported> - ether_ntoa_r <not supported> - getnetgrent_r <not supported> - getaliasent_r <not supported> - getaliasbyname_r <not supported> - nscd_getpw_r <not supported> - nscd_getgr_r <not supported> - nscd_gethst_r <not supported> - getutent_r <desired> <--- - getutent_r_unknown <not supported> - getutid_r_unknown <not supported> - getutline_r_unknown <not supported> - getutid_r <desired> <--- - 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> - __fgetpwent_r <not supported> - __ttyname_r <not supported> - __getmntent_r <not supported> - __getspent_r <not supported> - __getspnam_r <not supported> - __sgetspent_r <not supported> - __fgetspent_r <not supported> - __gethostbyaddr_r <not supported> - __gethostbyname2_r <not supported> - __gethostbyname_r <not supported> - __gethostent_r <not supported - __getnetbyaddr_r <not supported> - __getnetent_r <not supported> - __getnetbyname_r <not supported> - __getprotobynumber_r <not supported> - __getprotoent_r <not supported> - __getprotobyname_r <not supported> - __getservbyname_r <not supported> - __getservbyport_r <not supported> - __getrpcent_r <not supported> - __getservent_r <not supported> - __getrpcbyname_r <not supported> - __getrpcbynumber_r <not supported> - __getnetgrent_r <not supported> - __internal_getnetgrent_r <not supported> - __getaliasent_r <not supported> - __getaliasbyname_r <not supported> - __nscd_getpwnam_r <not supported> - __nscd_getpwuid_r <not supported> - __nscd_getgrgid_r <not supported> - __nscd_getgrnam_r <not supported> - __nscd_gethostbyaddr_r <not supported> - __nscd_gethostbyname2_r <not supported> - __nscd_gethostbyname_r <not supported> - __getutent_r <not supported> - __getutid_r <not supported> - __getutline_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 <implemented> - gethostbyaddr_r <implemented> - gethostbyname_r <implemented> - gethostent_r <not supported> - getnetbyaddr_r <desired> <--- - getnetbyname_r <desired> <--- - getnetent_r <desired> <--- - getprotobynumber_r <desired> <--- - getprotoent_r <desired> <--- - getprotobyname_r <desired> <--- - getservbyname_r <implemented> - getservbyport_r <implemented> - getservent_r <implemented> - - -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/des.c: - - static u_char inv_key_perm[64]; - static u_char inv_comp_perm[56]; - static u_char u_sbox[8][64]; - static u_char u_key_perm[56]; - static u_char un_pbox[32]; - static u_int32_t en_keysl[16], en_keysr[16]; - static u_int32_t de_keysl[16], de_keysr[16]; - static u_int32_t ip_maskl[8][256], ip_maskr[8][256]; - static u_int32_t fp_maskl[8][256], fp_maskr[8][256]; - static u_int32_t key_perm_maskl[8][128], key_perm_maskr[8][128]; - static u_int32_t comp_maskl[8][128], comp_maskr[8][128]; - static u_int32_t saltbits; - - __des_crypt_r <implemented badly!> <--- - - This needs to be fixed to actually be reentrant. Right now it - just fakes it, which is pretty lame.... All the above should be - moved into a 'struct des_context' or some such... - - -------------------------------------------------------------------- - - crypt/md5.c: - - static const char __md5__magic[]; - static const unsigned char __md5_itoa64[]; - - __md5_crypt_r <implemented> - - No problems here... - - - -------------------------------------------------------------------- - - inet/addr.c: - - static char buf[16]; - - inet_ntoa <implemented> - inet_ntoa_r <implemented> - - -------------------------------------------------------------------- - - inet/getnetent.c: - - static FILE *netf = NULL; - static char line[BUFSIZ+1]; - static struct netent net; - static char *net_aliases[MAXALIASES]; - - setnetent <mutex required> - endnetent <mutex required> - getnetent <mutex required> - getnetent_r <not implemented> - - NOTE: setnetent and endnetent are not implemented in glibc. - - -------------------------------------------------------------------- - - 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 <mutex required> - endprotoent <mutex required> - getprotoent <mutex required> - getprotoent_r <implemented> - getprotobyname <implemented> - getprotobyname_r <not implemented> - getprotobynumber <implemented> - getprotobynumber_r <not implemented> - - NOTE: setprotoent and endprotoent are not implemented in glibc. - - -------------------------------------------------------------------- - - 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 <mutex required> - endservent <fix mutex required> - getservent <mutex required> - getservent_r <implemented> - getservbyname <mutex required> - getservbyname_r <implemented> - getservbyport <mutex required> - getservbyport_r <implemented> - - NOTE: setservent and endservent are not implemented in glibc. - - -------------------------------------------------------------------- - - static struct hostent h; - static char buf[xxx]; - - gethostbyname <implemented> - - - static struct hostent h; - static char buf[xxx]; - - gethostbyname2 <implemented> - - static struct hostent h; - static char buf[xxx]; - - gethostbyaddr <implemented> - - - static int __stay_open; - static FILE * __gethostent_fp; - static struct hostent h; - static char buf[xxx]; - - gethostent <mutex required> - sethostent <mutex required> - endhostent <mutex required> - - -------------------------------------------------------------------- - - 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 <no fix required> - - This is supposed to be random trash, so the more threading - collisions the better... - - -------------------------------------------------------------------- - - 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 <mutex required> - getmntent_r <implemented> - - -------------------------------------------------------------------- - - 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 static_fd = -1; - static struct utmp static_utmp; - static const char default_file_name[] = _PATH_UTMP; - static const char *static_ut_name = (const char *) default_file_name; - - - setutent <ok> - endutent <ok> - getutent <ok> - getutid <ok> - getutline <ok> - pututline <ok> - utmpname <ok> - __getutent <ok> - - -------------------------------------------------------------------- - - 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 <ok> - - -------------------------------------------------------------------- - - stdlib/setenv.c: - - static char **last_environ; - - __add_to_environ <ok> - unsetenv <ok> - setenv <ok> - clearenv <ok> - putenv <ok> - - all ok now. - - -------------------------------------------------------------------- - - 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/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: - - A bunch of stuff - - malloc <ok> - realloc <ok> - free <ok> - etc <ok> - - -------------------------------------------------------------------- - - string/strerror.c: - - static char retbuf[48]; - static char retbuf[33]; + libc/inet/rpc/rpc_thread.c: - strerror <fix required> <--- - strerror_r <fix required> <--- + __rpc_thread_variables is currently disabled, since thread + local storage seems to not be correctly specified as + weak functions. -------------------------------------------------------------------- - string/strsignal.c: - - static char retbuf[28]; - - strsignal <fix required> <--- - main <fix required> <--- - - -------------------------------------------------------------------- - - string/strtok.c: - - static char *save = 0; - - strtok <ok> - strtok_r <ok> - - -------------------------------------------------------------------- - - 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/getopt.c: - - static int sp = 1; - - getopt <fix required> <--- - - -------------------------------------------------------------------- - unistd/getpass.c: static char buf[PWD_BUFFER_SIZE]; @@ -1364,23 +52,6 @@ http://www.vitanuova.com/inferno/index.html -------------------------------------------------------------------- - 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]; @@ -1388,800 +59,6 @@ http://www.vitanuova.com/inferno/index.html 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> <--- + NOTE: I'm not sure if this needs to be made reentrant... -------------------------------------------------------------------- - - 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> <--- - |