FreeBSD で Valgrind を使用しようとしていますが、いくつかの問題が発生しています。ここに出力があります
==4764== Memcheck, a memory error detector
==4764== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al.
==4764== Using Valgrind-3.8.0 and LibVEX; rerun with -h for copyright info
==4764== Command: driver -i
==4764==
==4764==
==4764== HEAP SUMMARY:
==4764== in use at exit: 33,852 bytes in 4 blocks
==4764== total heap usage: 12 allocs, 8 frees, 171,894 bytes allocated
==4764==
==4764== LEAK SUMMARY:
==4764== definitely lost: 0 bytes in 0 blocks
==4764== indirectly lost: 0 bytes in 0 blocks
==4764== possibly lost: 0 bytes in 0 blocks
==4764== still reachable: 33,852 bytes in 4 blocks
==4764== suppressed: 0 bytes in 0 blocks
==4764== Rerun with --leak-check=full to see details of leaked memory
==4764==
==4764== For counts of detected and suppressed errors, rerun with: -v
==4764== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==4765== Syscall param ioctl(generic) points to uninitialised byte(s)
==4765== at 0x3196CBC: __sys_ioctl (in /lib/libc.so.7)
==4765== by 0x1A40469: ??? (in /lib/libpcap.so.8)
==4765== by 0x1A3ED18: pcap_activate (in /lib/libpcap.so.8)
==4765== by 0x1A3F43A: pcap_open_live (in /lib/libpcap.so.8)
==4765== by 0x1822DB7: pcap_init (pcaputil.c:77)
==4765== by 0x120FE6A: driver_init (recfm.c:387)
==4765== by 0x402633: main (driver.c:224)
==4765== Address 0x7ff000270 is on thread 1's stack
==4765== Uninitialised value was created by a stack allocation
==4765== at 0x1A3FED0: ??? (in /lib/libpcap.so.8)
==4765==
==4765== Conditional jump or move depends on uninitialised value(s)
==4765== at 0x1A408DD: ??? (in /lib/libpcap.so.8)
==4765== by 0x1A3ED18: pcap_activate (in /lib/libpcap.so.8)
==4765== by 0x1A3F43A: pcap_open_live (in /lib/libpcap.so.8)
==4765== by 0x1822DB7: pcap_init (pcaputil.c:77)
==4765== by 0x120FE6A: driver_init (recfm.c:387)
==4765== by 0x402633: main (driver.c:224)
==4765== Uninitialised value was created by a heap allocation
==4765== at 0x1008DAB: malloc (vg_replace_malloc.c:274)
==4765== by 0x1A4013E: ??? (in /lib/libpcap.so.8)
==4765== by 0x1A3ED18: pcap_activate (in /lib/libpcap.so.8)
==4765== by 0x1A3F43A: pcap_open_live (in /lib/libpcap.so.8)
==4765== by 0x1822DB7: pcap_init (pcaputil.c:77)
==4765== by 0x120FE6A: driver_init (recfm.c:387)
==4765== by 0x402633: main (driver.c:224)
==4765==
==4765== Warning: noted but unhandled ioctl 0x20004269 with no size/direction hints This could cause spurious value errors to appear. See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.Syscall param ioctl(generic) points to uninitialised byte(s)
==4765== at 0x3196CBC: __sys_ioctl (in /lib/libc.so.7)
==4765== by 0x1A40291: ??? (in /lib/libpcap.so.8)
==4765== by 0x1A3ED18: pcap_activate (in /lib/libpcap.so.8)
==4765== by 0x1A3F43A: pcap_open_live (in /lib/libpcap.so.8)
==4765== by 0x1822DB7: pcap_init (pcaputil.c:77)
==4765== by 0x120FE6A: driver_init (recfm.c:387)
==4765== by 0x402633: main (driver.c:224)
==4765== Address 0x7fefffd14 is on thread 1's stack
==4765== Uninitialised value was created by a stack allocation
==4765== at 0x1A3FEF8: ??? (in /lib/libpcap.so.8)
==4765==
==4765== Syscall param ioctl(generic) points to uninitialised byte(s)
==4765== at 0x3196CBC: __sys_ioctl (in /lib/libc.so.7)
==4765== by 0x1A40C98: ??? (in /lib/libpcap.so.8)
==4765== by 0x1823277: pcap_init (pcaputil.c:98)
==4765== by 0x120FE6A: driver_init (recfm.c:387)
==4765== by 0x402633: main (driver.c:224)
==4765== Address 0x7ff000454 is on thread 1's stack
==4765== Uninitialised value was created by a stack allocation
==4765== at 0x1822C10: pcap_init (pcaputil.c:61)
==4765==
--4765-- WARNING: unhandled syscall: 522
--4765-- You may be able to write your own handler.
--4765-- Read the file README_MISSING_SYSCALL_OR_IOCTL.
--4765-- Nevertheless we consider this a bug. Please report
--4765-- it at http://valgrind.org/support/bug_reports.html.
...repeated a bunch of times
その最後の警告は何度も繰り返されますが、必ずしも問題があるとは思いませんよね? もっと心配なのは、私が思うもう一つの問題です。
私のプログラムはまだバックグラウンドで実行されているようですが、明らかに valgrind から適切なレポートが得られません。それが言及している問題のある行の1つは pcaputil:77 です
これは次のとおりです。
pd=pcap_open_live(__intf, snaplen, 1, 512, ebuf)
は_intf、はchar *、は配列ですsnaplenintebufchar ebuf[SIZE] = {0};