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HOOK正在使用的接口，还是会CRASH #5

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clarkehe opened this issue Oct 10, 2016 · 4 comments
Closed

HOOK正在使用的接口，还是会CRASH #5

clarkehe opened this issue Oct 10, 2016 · 4 comments

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@clarkehe
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clarkehe commented Oct 10, 2016 •
edited

HOOK了系统进程的一个接口，触发该接口频繁调用时HOOK, 会CRASH， 被HOOK的接口在子线程中被调用的。 测试机型Nexus 5 4.4系统。
@ele7enxxh
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有例子吗?

@clarkehe
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clarkehe commented Oct 11, 2016 •
edited

有，必现的。你QQ多少，我加下你。我的QQ 2711983007

@clarkehe
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已经解决，是程序逻辑上的问题。
当inlineHook返回时，子线程已经开始执行了，由于在inlineHook返回后才更新程序的返回地址（初始为空），子线程中会执行HOOK替换函数，HOOK替换函数会调用返回地址，返回地址没有更新，为NULL, 就CRASH了。

一定要将你本地保存的返回地址作为引用传给registerInlineHook(第三个参数)，我是传了一局部变量，在inlineHook返回后，再将局部变量赋给本地保存地址的变量。

@ele7enxxh
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good job~

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@clarkehe @ele7enxxh