看网上描述说直接调用一句

ptrace(PTRACE_ATTACH, parent, 0, 0)

就能实现ptrace占坑，阻止ida等调试器调试。但是我调用这句代码为什么会报错Permission denied呢？它需要什么权限？
尝试过包含root机在内的三台真机+模拟器都出现了相同的权限问题。

另外换了网上找到的demo(f07K9s2c8@1M7s2y4Q4x3@1q4Q4x3V1k6Q4x3V1k6%4N6%4N6Q4x3X3g2X3M7X3g2W2j5Y4g2X3i4K6u0W2j5$3!0E0i4K6u0r3M7$3g2U0N6r3!0G2L8q4)9J5c8U0t1#2y4K6M7$3y4W2)9J5k6h3S2@1L8h3I4Q4x3U0W2Q4c8e0c8Q4b7U0W2Q4z5f1k6Q4c8e0k6Q4z5e0S2Q4b7f1k6Q4c8e0c8Q4b7U0S2Q4z5o6m8Q4c8e0k6Q4b7e0m8Q4b7U0N6Q4c8e0N6Q4z5f1q4Q4z5o6c8Q4c8f1k6Q4b7V1y4Q4z5p5y4Q4c8e0k6Q4z5o6S2Q4z5e0q4Q4c8e0c8Q4b7V1c8Q4b7V1k6Q4c8e0N6Q4z5e0c8Q4b7e0S2Q4c8e0S2Q4b7V1k6Q4z5e0W2Q4c8e0c8Q4b7V1c8Q4z5p5c8Q4c8e0g2Q4z5p5c8Q4z5f1q4Q4c8e0c8Q4b7U0S2Q4b7V1u0Q4c8e0N6Q4z5f1q4Q4z5o6c8V1k6h3#2G2i4@1f1#2i4K6V1J5i4K6S2o6i4@1f1@1i4@1u0n7i4K6V1$3i4@1f1$3i4K6S2r3i4K6S2r3i4@1f1^5i4@1u0r3i4@1t1H3i4@1f1%4i4K6W2m8i4K6R3@1i4@1f1%4i4K6S2q4i4@1t1H3i4@1f1^5i4@1t1I4i4@1p5I4i4@1f1#2i4@1q4q4i4K6S2o6i4@1f1#2i4K6R3#2i4@1p5^5i4@1f1@1i4@1t1^5i4K6S2p5i4@1f1#2i4K6V1H3i4K6S2o6i4@1g2r3i4@1u0o6i4K6S2o6TracerPid始终为0。

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