diff options
author | Martin KaFai Lau <kafai@fb.com> | 2018-12-08 03:42:32 +0300 |
---|---|---|
committer | Alexei Starovoitov <ast@kernel.org> | 2018-12-10 00:54:38 +0300 |
commit | b053b439b72ad152257ecc3f71cfb4c619b0137e (patch) | |
tree | 9cb7c5a026580ee81dff5af7fd84eee3eb2571a4 /tools/bpf/bpftool/xlated_dumper.c | |
parent | 3d65014146c69bbc4d2947f60dbd722d352cdc46 (diff) | |
download | linux-b053b439b72ad152257ecc3f71cfb4c619b0137e.tar.xz |
bpf: libbpf: bpftool: Print bpf_line_info during prog dump
This patch adds print bpf_line_info function in 'prog dump jitted'
and 'prog dump xlated':
[root@arch-fb-vm1 bpf]# ~/devshare/fb-kernel/linux/tools/bpf/bpftool/bpftool prog dump jited pinned /sys/fs/bpf/test_btf_haskv
[...]
int test_long_fname_2(struct dummy_tracepoint_args * arg):
bpf_prog_44a040bf25481309_test_long_fname_2:
; static int test_long_fname_2(struct dummy_tracepoint_args *arg)
0: push %rbp
1: mov %rsp,%rbp
4: sub $0x30,%rsp
b: sub $0x28,%rbp
f: mov %rbx,0x0(%rbp)
13: mov %r13,0x8(%rbp)
17: mov %r14,0x10(%rbp)
1b: mov %r15,0x18(%rbp)
1f: xor %eax,%eax
21: mov %rax,0x20(%rbp)
25: xor %esi,%esi
; int key = 0;
27: mov %esi,-0x4(%rbp)
; if (!arg->sock)
2a: mov 0x8(%rdi),%rdi
; if (!arg->sock)
2e: cmp $0x0,%rdi
32: je 0x0000000000000070
34: mov %rbp,%rsi
; counts = bpf_map_lookup_elem(&btf_map, &key);
37: add $0xfffffffffffffffc,%rsi
3b: movabs $0xffff8881139d7480,%rdi
45: add $0x110,%rdi
4c: mov 0x0(%rsi),%eax
4f: cmp $0x4,%rax
53: jae 0x000000000000005e
55: shl $0x3,%rax
59: add %rdi,%rax
5c: jmp 0x0000000000000060
5e: xor %eax,%eax
; if (!counts)
60: cmp $0x0,%rax
64: je 0x0000000000000070
; counts->v6++;
66: mov 0x4(%rax),%edi
69: add $0x1,%rdi
6d: mov %edi,0x4(%rax)
70: mov 0x0(%rbp),%rbx
74: mov 0x8(%rbp),%r13
78: mov 0x10(%rbp),%r14
7c: mov 0x18(%rbp),%r15
80: add $0x28,%rbp
84: leaveq
85: retq
[...]
With linum:
[root@arch-fb-vm1 bpf]# ~/devshare/fb-kernel/linux/tools/bpf/bpftool/bpftool prog dump jited pinned /sys/fs/bpf/test_btf_haskv linum
int _dummy_tracepoint(struct dummy_tracepoint_args * arg):
bpf_prog_b07ccb89267cf242__dummy_tracepoint:
; return test_long_fname_1(arg); [file:/data/users/kafai/fb-kernel/linux/tools/testing/selftests/bpf/test_btf_haskv.c line_num:54 line_col:9]
0: push %rbp
1: mov %rsp,%rbp
4: sub $0x28,%rsp
b: sub $0x28,%rbp
f: mov %rbx,0x0(%rbp)
13: mov %r13,0x8(%rbp)
17: mov %r14,0x10(%rbp)
1b: mov %r15,0x18(%rbp)
1f: xor %eax,%eax
21: mov %rax,0x20(%rbp)
25: callq 0x000000000000851e
; return test_long_fname_1(arg); [file:/data/users/kafai/fb-kernel/linux/tools/testing/selftests/bpf/test_btf_haskv.c line_num:54 line_col:2]
2a: xor %eax,%eax
2c: mov 0x0(%rbp),%rbx
30: mov 0x8(%rbp),%r13
34: mov 0x10(%rbp),%r14
38: mov 0x18(%rbp),%r15
3c: add $0x28,%rbp
40: leaveq
41: retq
[...]
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/bpf/bpftool/xlated_dumper.c')
-rw-r--r-- | tools/bpf/bpftool/xlated_dumper.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/tools/bpf/bpftool/xlated_dumper.c b/tools/bpf/bpftool/xlated_dumper.c index 131ecd175533..aef628dcccb6 100644 --- a/tools/bpf/bpftool/xlated_dumper.c +++ b/tools/bpf/bpftool/xlated_dumper.c @@ -41,6 +41,7 @@ #include <stdlib.h> #include <string.h> #include <sys/types.h> +#include <libbpf.h> #include "disasm.h" #include "json_writer.h" @@ -234,8 +235,9 @@ static const char *print_imm(void *private_data, } void dump_xlated_json(struct dump_data *dd, void *buf, unsigned int len, - bool opcodes) + bool opcodes, bool linum) { + const struct bpf_prog_linfo *prog_linfo = dd->prog_linfo; const struct bpf_insn_cbs cbs = { .cb_print = print_insn_json, .cb_call = print_call, @@ -246,6 +248,7 @@ void dump_xlated_json(struct dump_data *dd, void *buf, unsigned int len, struct bpf_insn *insn = buf; struct btf *btf = dd->btf; bool double_insn = false; + unsigned int nr_skip = 0; char func_sig[1024]; unsigned int i; @@ -273,6 +276,16 @@ void dump_xlated_json(struct dump_data *dd, void *buf, unsigned int len, } } + if (prog_linfo) { + const struct bpf_line_info *linfo; + + linfo = bpf_prog_linfo__lfind(prog_linfo, i, nr_skip); + if (linfo) { + btf_dump_linfo_json(btf, linfo, linum); + nr_skip++; + } + } + jsonw_name(json_wtr, "disasm"); print_bpf_insn(&cbs, insn + i, true); @@ -307,8 +320,9 @@ void dump_xlated_json(struct dump_data *dd, void *buf, unsigned int len, } void dump_xlated_plain(struct dump_data *dd, void *buf, unsigned int len, - bool opcodes) + bool opcodes, bool linum) { + const struct bpf_prog_linfo *prog_linfo = dd->prog_linfo; const struct bpf_insn_cbs cbs = { .cb_print = print_insn, .cb_call = print_call, @@ -318,6 +332,7 @@ void dump_xlated_plain(struct dump_data *dd, void *buf, unsigned int len, struct bpf_func_info *record; struct bpf_insn *insn = buf; struct btf *btf = dd->btf; + unsigned int nr_skip = 0; bool double_insn = false; char func_sig[1024]; unsigned int i; @@ -340,6 +355,17 @@ void dump_xlated_plain(struct dump_data *dd, void *buf, unsigned int len, } } + if (prog_linfo) { + const struct bpf_line_info *linfo; + + linfo = bpf_prog_linfo__lfind(prog_linfo, i, nr_skip); + if (linfo) { + btf_dump_linfo_plain(btf, linfo, "; ", + linum); + nr_skip++; + } + } + double_insn = insn[i].code == (BPF_LD | BPF_IMM | BPF_DW); printf("% 4d: ", i); |