I downloaded strace version 4.13 and was able to build the source code and produce the strace executable. I need to see the all of the payload in the recvmsg and sendmsg calls. including the iov style arrays
My system is RHEL Server 5.8 Tikanga. Kernel version 2.6.18-348.el5 When I run strace with the following command line: ./strace -p <mypid> -e 'trace=recvmsg,sendmsg' -e write=8 -e read=8 I am getting the following output (which contains errors). Can someone explain why and if this can be fixed? sendmsg(8, {msg_name=NULL, msg_namelen=-7630976, msg_iov=NULL, msg_iovlen=92, msg_control=[{cmsg_len=2048, cmsg_level=SOL_IP, cmsg_type=0x8f800000 /* IP_??? */}, {cmsg_len=2565867895, cmsg_level=0xc26cff8b /* SOL_??? */, cmsg_type=0x8cacff8b}, ...], msg_controllen=38647074816, msg_flags=MSG_DONTROUTE|MSG_CTRUNC|MSG_DONTWAIT|MSG_WAITALL|MSG_FIN|MSG_SYN|MSG_CONFIRM|MSG_MORE|0xff8b0010}, 0) = 12 sendmsg(8, {msg_name=NULL, msg_namelen=-7623584, msg_iov=NULL, msg_iovlen=33655230453052149, msg_control=./strace: umoven: short read (13250 < 20480) @0xff8bac3e: Input/output error 0x2ff8bac3e, msg_controllen=38647082208, msg_flags=MSG_DONTROUTE|MSG_CTRUNC|MSG_TRUNC|MSG_SYN|MSG_CONFIRM|MSG_ERRQUEUE|MSG_MORE|0xff8b0010}, 0) = 12 ./strace: Out of memory recvmsg(8, {msg_name=NULL, msg_namelen=-7623488, msg_iov=NULL, msg_iovlen=0, msg_control=NULL, msg_controllen=17869443930177667072, msg_flags=MSG_CTRUNC|MSG_TRUNC|MSG_WAITALL|MSG_CONFIRM|0xbe00010}, MSG_WAITALL) = 4188 sendmsg(8, {msg_name=NULL, msg_namelen=-7623584, msg_iov=NULL, msg_iovlen=33655230453052149, msg_control=./strace: umoven: short read (13250 < 20480) @0xff8bac3e: Input/output error 0x2ff8bac3e, msg_controllen=38647082208, msg_flags=MSG_DONTROUTE|MSG_CTRUNC|MSG_TRUNC|MSG_SYN|MSG_CONFIRM|MSG_ERRQUEUE|MSG_MORE|0xff8b0010}, 0) = 12 ./strace: Out of memory recvmsg(8, {msg_name=NULL, msg_namelen=-7623488, msg_iov=NULL, msg_iovlen=0, msg_control=NULL, msg_controllen=17869443930177667072, msg_flags=MSG_CTRUNC|MSG_TRUNC|MSG_WAITALL|MSG_CONFIRM|0xbe00010}, MSG_WAITALL) = 12 recvmsg(8, {msg_name=NULL, msg_namelen=-7623488, msg_iov=NULL, msg_iovlen=0, msg_control=NULL, msg_controllen=17869443930177667072, msg_flags=MSG_CTRUNC|MSG_TRUNC|MSG_WAITALL|MSG_CONFIRM|0xbe00010}, MSG_WAITALL) = 12 recvmsg(8, {msg_name=NULL, msg_namelen=-7623488, msg_iov=NULL, msg_iovlen=0, msg_control=NULL, msg_controllen=17869443930177667072, msg_flags=MSG_CTRUNC|MSG_TRUNC|MSG_WAITALL|MSG_CONFIRM|0xbe00010}, MSG_WAITALL) = 4188 sendmsg(8, {msg_name=NULL, msg_namelen=-7623584, msg_iov=NULL, msg_iovlen=33655230453052149, msg_control=./strace: umoven: short read (13250 < 20480) @0xff8bac3e: Input/output error 0x2ff8bac3e, msg_controllen=38647082208, msg_flags=MSG_DONTROUTE|MSG_CTRUNC|MSG_TRUNC|MSG_SYN|MSG_CONFIRM|MSG_ERRQUEUE|MSG_MORE|0xff8b0010}, 0) = 12 ./strace: Out of memory recvmsg(8, {msg_name=NULL, msg_namelen=-7623488, msg_iov=NULL, msg_iovlen=0, msg_control=NULL, msg_controllen=17869443930177667072, msg_flags=MSG_CTRUNC|MSG_TRUNC|MSG_WAITALL|MSG_CONFIRM|0xbe00010}, MSG_WAITALL) = 4188 sendmsg(8, {msg_name=NULL, msg_namelen=-7623584, msg_iov=NULL, msg_iovlen=33655230453052149, msg_control=./strace: umoven: short read (13250 < 20480) @0xff8bac3e: Input/output error 0x2ff8bac3e, msg_controllen=38647082208, msg_flags=MSG_DONTROUTE|MSG_CTRUNC|MSG_TRUNC|MSG_SYN|MSG_CONFIRM|MSG_ERRQUEUE|MSG_MORE|0xff8b0010}, 0) = 12 ./strace: Out of memory recvmsg(8, {msg_name=NULL, msg_namelen=-7623488, msg_iov=NULL, msg_iovlen=0, msg_control=NULL, msg_controllen=17869443930177667072, msg_flags=MSG_CTRUNC|MSG_TRUNC|MSG_WAITALL|MSG_CONFIRM|0xbe00010}, MSG_WAITALL) = 12 recvmsg(8, {msg_name=NULL, msg_namelen=-7623488, msg_iov=NULL, msg_iovlen=0, msg_control=NULL, msg_controllen=17869443930177667072, msg_flags=MSG_CTRUNC|MSG_TRUNC|MSG_WAITALL|MSG_CONFIRM|0xbe00010}, MSG_WAITALL) = 4188 sendmsg(8, {msg_name=NULL, msg_namelen=-7623584, msg_iov=NULL, msg_iovlen=33655230453052149, msg_control=./strace: umoven: short read (13250 < 20480) @0xff8bac3e: Input/output error 0x2ff8bac3e, msg_controllen=38647082208, msg_flags=MSG_DONTROUTE|MSG_CTRUNC|MSG_TRUNC|MSG_SYN|MSG_CONFIRM|MSG_ERRQUEUE|MSG_MORE|0xff8b0010}, 0) = 12 ./strace: Out of memory recvmsg(8, {msg_name=NULL, msg_namelen=-7623488, msg_iov=NULL, msg_iovlen=0, msg_control=NULL, msg_controllen=17869443930177667072, msg_flags=MSG_CTRUNC|MSG_TRUNC|MSG_WAITALL|MSG_CONFIRM|0xbe00010}, MSG_WAITALL) = 4188 sendmsg(8, {msg_name=NULL, msg_namelen=-7631616, msg_iov=NULL, msg_iovlen=10, msg_control=[{cmsg_len=17920, cmsg_level=SOL_IP, cmsg_type=0x8d000000 /* IP_??? */}, {cmsg_len=3158845, cmsg_level=0x5f534d4e /* SOL_??? */, cmsg_type=0x4e5f534f}, ...], msg_controllen=300847264664, msg_flags=MSG_DONTROUTE|MSG_CTRUNC|MSG_DONTWAIT|MSG_EOR|MSG_SYN|MSG_CONFIRM|MSG_MORE|0xff8b0010}, 0) = 74 sendmsg(8, {msg_name=NULL, msg_namelen=-7631504, msg_iov=NULL, msg_iovlen=29510720283184520, msg_control=[{cmsg_len=2048, cmsg_level=SOL_IP, cmsg_type=0x8d700000 /* IP_??? */}, {cmsg_len=3971745833, cmsg_level=0x7ff00bc7 /* SOL_??? */, cmsg_type=0xbda}, ...], msg_controllen=38647074288, msg_flags=MSG_DONTROUTE|MSG_CTRUNC|MSG_DONTWAIT|MSG_WAITALL|MSG_SYN|MSG_CONFIRM|MSG_MORE|0xff8b0000}, 0) = 12 ./strace: Out of memory sendmsg(8, {msg_name=NULL, msg_namelen=-7623584, msg_iov=NULL, msg_iovlen=33655230453052149, msg_control=./strace: umoven: short read (13250 < 20480) @0xff8bac3e: Input/output error 0x2ff8bac3e, msg_controllen=38647082208, msg_flags=MSG_DONTROUTE|MSG_CTRUNC|MSG_TRUNC|MSG_SYN|MSG_CONFIRM|MSG_ERRQUEUE|MSG_MORE|0xff8b0010}, 0) = 12 ./strace: Out of memory ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Strace-devel mailing list Strace-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/strace-devel