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test.lua: Port the
test_uprobes
suite
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require("test_helper") | ||
local ffi = require("ffi") | ||
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ffi.cdef[[ | ||
int getpid(void); | ||
void malloc_stats(void); | ||
]] | ||
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TestUprobes = {} | ||
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function TestUprobes:test_simple_library() | ||
local text = [[ | ||
#include <uapi/linux/ptrace.h> | ||
BPF_TABLE("array", int, u64, stats, 1); | ||
static void incr(int idx) { | ||
u64 *ptr = stats.lookup(&idx); | ||
if (ptr) | ||
++(*ptr); | ||
} | ||
int count(struct pt_regs *ctx) { | ||
u32 pid = bpf_get_current_pid_tgid(); | ||
if (pid == PID) | ||
incr(0); | ||
return 0; | ||
}]] | ||
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local pid = tonumber(ffi.C.getpid()) | ||
local text = text:gsub("PID", tostring(pid)) | ||
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local b = BPF:new{text=text} | ||
b:attach_uprobe{name="c", sym="malloc_stats", fn_name="count"} | ||
b:attach_uprobe{name="c", sym="malloc_stats", fn_name="count", retprobe=true} | ||
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assert_equals(BPF.num_open_uprobes(), 2) | ||
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ffi.C.malloc_stats() | ||
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local stats = b:get_table("stats") | ||
assert_equals(tonumber(stats:get(0)), 2) | ||
end | ||
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function TestUprobes:test_simple_binary() | ||
local text = [[ | ||
#include <uapi/linux/ptrace.h> | ||
BPF_TABLE("array", int, u64, stats, 1); | ||
static void incr(int idx) { | ||
u64 *ptr = stats.lookup(&idx); | ||
if (ptr) | ||
++(*ptr); | ||
} | ||
int count(struct pt_regs *ctx) { | ||
u32 pid = bpf_get_current_pid_tgid(); | ||
incr(0); | ||
return 0; | ||
}]] | ||
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local b = BPF:new{text=text} | ||
b:attach_uprobe{name="/usr/bin/python", sym="main", fn_name="count"} | ||
b:attach_uprobe{name="/usr/bin/python", sym="main", fn_name="count", retprobe=true} | ||
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os.spawn("/usr/bin/python -V") | ||
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local stats = b:get_table("stats") | ||
assert_true(tonumber(stats:get(0)) >= 2) | ||
end | ||
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function TestUprobes:teardown() | ||
BPF.cleanup_probes() | ||
end | ||
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os.exit(LuaUnit.run()) |