Hi all,
I'm sorry I'm not sure if it's proper to ask question here :)
I just want to try bcc tools on centos6.5, according to INSTALL.md I have to
update a lot of packets and some fix for bcc, finally I can use most of the
tools, that's really a good news to me.
The yum source for most required packets is too old to match bcc so I
update/install most of packets via souce code including following:
kernel 4.9-rc4
python 2.7.9
gcc 6.1.0
glibc 2.24
llvm 5.0.0svn (that's from git tree)
and others...
The fix for bcc is that I encounter runtime error like this:
[root@local examples]# LD_LIBRARY_PATH=/usr/local/lib64
PYTHONPATH=/usr/lib/python2.7/site-packages python ./hello_world.py
error: <unknown>:0:0: in function bpf_dext_pkt i64 (i8*, i64, i64, i64): A call
to global function 'load_dword' is not supported. Please use
__attribute__((always_inline) to make sure this function is inlined.
src/cc/export/helpers.h | 22 +++++++++++-----------
1 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/src/cc/export/helpers.h b/src/cc/export/helpers.h
index 1fa20a5..e1a0f09 100644
--- a/src/cc/export/helpers.h
+++ b/src/cc/export/helpers.h
@@ -261,40 +261,40 @@ static int (*bpf_l4_csum_replace)(void *ctx, unsigned long
long off, unsigned lo
unsigned long long to, unsigned long long
flags) =
(void *) BPF_FUNC_l4_csum_replace;
-static inline u16 bpf_ntohs(u16 val) {
+static inline __attribute__((always_inline)) u16 bpf_ntohs(u16 val) {
/* will be recognized by gcc into rotate insn and eventually rolw 8 */
return (val << 8) | (val >> 8);
}
-static inline u32 bpf_ntohl(u32 val) {
+static inline __attribute__((always_inline)) u32 bpf_ntohl(u32 val) {
/* gcc will use bswapsi2 insn */
return __builtin_bswap32(val);
}
-static inline u64 bpf_ntohll(u64 val) {
+static inline __attribute__((always_inline)) u64 bpf_ntohll(u64 val) {
/* gcc will use bswapdi2 insn */
return __builtin_bswap64(val);
}
-static inline unsigned __int128 bpf_ntoh128(unsigned __int128 val) {
+static inline __attribute__((always_inline)) unsigned __int128
bpf_ntoh128(unsigned __int128 val) {
return (((unsigned __int128)bpf_ntohll(val) << 64) | (u64)bpf_ntohll(val >>
64));
}
-static inline u16 bpf_htons(u16 val) {
+static inline __attribute__((always_inline)) u16 bpf_htons(u16 val) {
return bpf_ntohs(val);
}
-static inline u32 bpf_htonl(u32 val) {
+static inline __attribute__((always_inline)) u32 bpf_htonl(u32 val) {
return bpf_ntohl(val);
}
-static inline u64 bpf_htonll(u64 val) {
+static inline __attribute__((always_inline)) u64 bpf_htonll(u64 val) {
return bpf_ntohll(val);
}
-static inline unsigned __int128 bpf_hton128(unsigned __int128 val) {
+static inline __attribute__((always_inline)) unsigned __int128
bpf_hton128(unsigned __int128 val) {
return bpf_ntoh128(val);
}
-static inline u64 load_dword(void *skb, u64 off) {
+static inline __attribute__((always_inline)) u64 load_dword(void *skb, u64
off) {
return ((u64)load_word(skb, off) << 32) | load_word(skb, off + 4);
}
@@ -310,7 +310,7 @@ static inline void bpf_store_dword(void *skb, u64 off, u64
val) {
#define MASK(_n) ((_n) < 64 ? (1ull << (_n)) - 1 : ((u64)-1LL))
#define MASK128(_n) ((_n) < 128 ? ((unsigned __int128)1 << (_n)) - 1 :
((unsigned __int128)-1))
-static inline unsigned int bpf_log2(unsigned int v)
+static inline __attribute__((always_inline)) unsigned int bpf_log2(unsigned
int v)
{
unsigned int r;
unsigned int shift;
@@ -323,7 +323,7 @@ static inline unsigned int bpf_log2(unsigned int v)
return r;
}
-static inline unsigned int bpf_log2l(unsigned long v)
+static inline __attribute__((always_inline)) unsigned int bpf_log2l(unsigned
long v)
{
unsigned int hi = v >> 32;
if (hi)
---
Then most non-network bcc tools work, while I try network bcc tool solisten and
again I fall into the same hole...
[root@local tools]# LD_LIBRARY_PATH=/usr/lib64/
PYTHONPATH=/usr/lib/python2.7/site-packages python ./solisten
error: <unknown>:0:0: in function kprobe__inet_listen i32 (%struct.pt_regs*): A
call to global function 'inet_sk' is not supported. Please use
__attribute__((always_inline) to make sure this function is inlined.
So it seems that I use a broken gcc or llvm, which make a enhance checking, or
something else, please point me out?
I compile gcc using very simple options:
../gcc-6.1.0/configure --enable-checking=release --enable-languages=c,c++
--disable-multilib
thanks in advance,
linfeng
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