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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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6452d39430
18-recv-nonblock Make recv() nonblocking. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@1266
129 lines
3.0 KiB
C
129 lines
3.0 KiB
C
/*
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* Intercepts for various libc functions we want to capture (mostly for threading purposes)
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*
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* This has some nasty duplication of stuff from vg_libpthread.c
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*/
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#include <errno.h>
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#include <sys/types.h>
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#include "valgrind.h"
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#include "vg_include.h"
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# define strong_alias(name, aliasname) \
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extern __typeof (name) aliasname __attribute__ ((alias (#name)));
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# define weak_alias(name, aliasname) \
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extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)));
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#define WEAK __attribute__((weak))
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#include "vg_kerneliface.h"
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static
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__inline__
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int is_kerror ( int res )
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{
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if (res >= -4095 && res <= -1)
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return 1;
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else
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return 0;
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}
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static inline
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int my_do_syscall5 ( int syscallno,
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int arg1, int arg2, int arg3, int arg4, int arg5 )
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{
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int __res;
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__asm__ volatile ("int $0x80"
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: "=a" (__res)
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: "0" (syscallno),
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"b" (arg1),
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"c" (arg2),
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"d" (arg3),
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"S" (arg4),
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"D" (arg5));
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return __res;
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}
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/* -------------------------------- msgsnd -------------------------------- */
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#include <asm/ipc.h> /* for ipc_kludge */
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static inline int sys_ipc(unsigned call, int first, int second, int third, void *ptr)
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{
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return my_do_syscall5(__NR_ipc, call, first, second, third, (int)ptr);
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}
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WEAK int VGL_(msgsnd)(int msgid, const void *msgp, size_t msgsz, int msgflg)
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{
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int err = sys_ipc(11, msgid, msgsz, msgflg, (void *)msgp);
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if (is_kerror(err)) {
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*(__errno_location()) = -err;
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return -1;
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}
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return 0;
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}
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int msgsnd(int msgid, const void *msgp, size_t msgsz, int msgflg)
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{
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return VGL_(msgsnd)(msgid, msgp, msgsz, msgflg);
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}
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/* -------------------------------- msgrcv -------------------------------- */
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WEAK int VGL_(msgrcv)( int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg )
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{
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struct ipc_kludge tmp;
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int err;
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tmp.msgp = msgp;
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tmp.msgtyp = msgtyp;
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err = sys_ipc(12, msqid, msgsz, msgflg, &tmp );
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if (is_kerror(err)) {
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*(__errno_location()) = -err;
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return -1;
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}
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return 0;
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}
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int msgrcv( int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg )
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{
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return VGL_(msgrcv)( msqid, msgp, msgsz, msgtyp, msgflg );
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}
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/* -------------------------------- accept -------------------------------- */
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#include <sys/socket.h>
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extern
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int __libc_accept(int s, struct sockaddr *addr, socklen_t *addrlen);
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WEAK int VGL_(accept)(int s, struct sockaddr *addr, socklen_t *addrlen)
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{
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return __libc_accept(s, addr, addrlen);
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}
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int accept(int s, struct sockaddr *addr, socklen_t *addrlen)
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{
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return VGL_(accept)(s, addr, addrlen);
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}
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/* -------------------------------- recv -------------------------------- */
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extern
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int __libc_recv(int s, void *buf, size_t len, int flags);
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WEAK int VGL_(recv)(int s, void *buf, size_t len, int flags)
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{
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return __libc_recv(s, buf, len, flags);
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}
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int recv(int s, void *buf, size_t len, int flags)
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{
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return VGL_(recv)(s, buf, len, flags);
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}
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strong_alias(recv, __recv)
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