34 lines
1.5 KiB
Markdown
34 lines
1.5 KiB
Markdown
# forceredfine
|
|
|
|
ForceRedefine is a JVMTI agent designed for testing how redefiniton affects running processes. It
|
|
allows one to force classes to be redefined by writing to a fifo or give a process a list of
|
|
classes to try redefining. Currently the redefinition is limited to adding (or removing) a single
|
|
NOP at the beginning of every function in the class.
|
|
|
|
# Usage
|
|
### Build
|
|
> `m libforceredefine`
|
|
|
|
The libraries will be built for 32-bit, 64-bit, host and target. Below examples
|
|
assume you want to use the 64-bit version.
|
|
|
|
#### ART
|
|
> `adb shell setenforce 0`
|
|
>
|
|
> `adb push $ANDROID_PRODUCT_OUT/system/lib64/libforceredefine.so /data/local/tmp/`
|
|
>
|
|
> `echo java/util/ArrayList > /tmp/classlist`
|
|
> `echo java/util/Arrays >> /tmp/classlist`
|
|
> `adb push /tmp/classlist /data/local/tmp/`
|
|
>
|
|
> `adb shell am attach-agent $(adb shell pidof some.deubggable.app) /data/local/tmp/libforceredefine.so=/data/local/tmp/classlist`
|
|
|
|
Since the agent has no static state it can be attached multiple times to the same process.
|
|
|
|
> `adb shell am attach-agent $(adb shell pidof some.deubggable.app) /data/local/tmp/libforceredefine.so=/data/local/tmp/classlist`
|
|
> `adb shell am attach-agent $(adb shell pidof some.deubggable.app) /data/local/tmp/libforceredefine.so=/data/local/tmp/classlist2`
|
|
> `adb shell am attach-agent $(adb shell pidof some.deubggable.app) /data/local/tmp/libforceredefine.so=/data/local/tmp/classlist`
|
|
|
|
One can also use fifos to send classes interactively to the process. (TODO: Have the agent
|
|
continue reading from the fifo even after it gets an EOF.)
|