hmz007
36ed224bac
Signed-off-by: hmz007 <hmz007@gmail.com> Change-Id: Ib87fdbe7a0be7dc961af3500fe9ea4589a127f9f
47 lines
1.2 KiB
Lua
Executable File
47 lines
1.2 KiB
Lua
Executable File
#!/usr/bin/env bcc-lua
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--[[
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Copyright 2016 GitHub, Inc
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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]]
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local program = [[
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#include <uapi/linux/ptrace.h>
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int trace_method(struct pt_regs *ctx) {
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uint64_t addr;
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bpf_usdt_readarg(2, ctx, &addr);
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char fn_name[128] = {};
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bpf_probe_read_user(&fn_name, sizeof(fn_name), (void *)addr);
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bpf_trace_printk("%s(...)\n", fn_name);
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return 0;
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};
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]]
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return function(BPF, util)
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if not arg[1] then
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print("usage: rubysyms.lua PID")
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return
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end
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local u = util.USDT:new{pid=tonumber(arg[1])}
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u:enable_probe{probe="method__entry", fn_name="trace_method"}
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local b = BPF:new{text=program, usdt=u}
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local pipe = b:pipe()
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while true do
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print(pipe:trace_fields())
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end
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end
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