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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
#include "vmlinux.h"
#include "bpf_experimental.h"
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
pid_t target_pid = 0;
unsigned int vmas_seen = 0;
struct {
__u64 vm_start;
__u64 vm_end;
} vm_ranges[1000];
SEC("raw_tp/sys_enter")
int iter_task_vma_for_each(const void *ctx)
{
struct task_struct *task = bpf_get_current_task_btf();
struct vm_area_struct *vma;
unsigned int seen = 0;
if (task->pid != target_pid)
return 0;
if (vmas_seen)
return 0;
bpf_for_each(task_vma, vma, task, 0) {
if (bpf_cmp_unlikely(seen, >=, 1000))
break;
vm_ranges[seen].vm_start = vma->vm_start;
vm_ranges[seen].vm_end = vma->vm_end;
seen++;
}
vmas_seen = seen;
return 0;
}
char _license[] SEC("license") = "GPL";
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