以下是一个使用libbpf-bootstrap和uprobes在Golang中进行内存监测的简单代码案例：
package main
/*
#cgo CFLAGS: -I/usr/include
#cgo LDFLAGS: -lelf -lz
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include "libbpf-bootstrap/libbpf-tools/include/bpf/bpf.h"
struct data_t {
int pid;
char comm[16];
};
BPF_PERF_OUTPUT(events);
int tracepoint_handler(struct bpf_perf_event_data *ctx) {
struct data_t data = {};
data.pid = bpf_get_current_pid_tgid() >> 32;
bpf_get_current_comm(&data.comm, sizeof(data.comm));
events.perf_submit(ctx, &data, sizeof(data));
return 0;
}
*/
import "C"
import (
"fmt"
"os"
"os/signal"
"syscall"
)
func main() {
fmt.Println("Tracing memory events. Ctrl+C to stop.")
module := C.CString("path/to/your/bpf/module.o") // 替换为实际的BPF模块路径
defer C.free(unsafe.Pointer(module))
obj := C.bpf_object__open(module)
if obj == nil {
fmt.Println("Failed to open BPF object")
return
}
C.bpf_object__load(obj)
mmapEventID := C.bpf_program__attach_tracepoint(C.bpf_object__find_program_by_name(obj, "mmap"))
if mmapEventID < 0 {
fmt.Println("Failed to attach tracepoint")
return
}
stopCh := make(chan os.Signal, 1)
signal.Notify(stopCh, syscall.SIGINT, syscall.SIGTERM)
<-stopCh
C.bpf_program__detach_tracepoint(mmapEventID)
C.bpf_object__close(obj)
fmt.Println("Tracing stopped.")
}
在上述代码中，我们使用了libbpf-bootstrap库来简化与BPF相关的操作，并通过uprobes机制在内核中注册了mmap事件的tracepoint。该程序将跟踪所有发生的mmap事件，并打印相应进程的PID和命令名。
请确保替换代码中指定BPF模块路径的部分为实际的BPF模块路径，并安装所需依赖（如libbpf、libelf等）以使代码能够成功编译和运行。
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