Posts: 1
Joined: Sun Mar 24, 2019 10:17 am

I2S mems microphone (SPH0645LM4H) installation issue : __sanitizer_cov_trace_pc

Sun Mar 24, 2019 10:33 am


When trying to install the Adafruit I2S MEMS Microphone (SPH0645LM4H) on a raspberry pi 3 b+ with the latest raspbian distribution (stretch) following :

https://learn.adafruit.com/adafruit-i2s ... g-and-test

I had a lot of problems.

The issues of the adafruit tutorial starts from the section "Download kernel source & compile"

Indeed the "rpi-source --skip-gcc" ouputs a lot of errors !

I solved most of them using :

# apt-get install build-essential
# apt-get install bison
# apt-get install flex
# apt-get install libssl-dev

But !!

At the step of compiling the I2S module proposed in the tutorial (written by Paul Creaser)
I had this warning about "__sanitizer_cov_trace_pc" :

pi:~/rpi-i2s-audio# make -C /lib/modules/$(uname -r )/build M=$(pwd) modules
make: Entering directory '/root/linux-5b12bd4c8cc5043a24fe2aaec09d4ded0e8d56d4'
Building modules, stage 2.
MODPOST 1 modules
WARNING: "__sanitizer_cov_trace_pc" [/root/rpi-i2s-audio/my_loader.ko] undefined!
make: Leaving directory '/root/linux-5b12bd4c8cc5043a24fe2aaec09d4ded0e8d56d4'

and when trying to run the module it fails with "Unknown symbol in module":

pi:~/rpi-i2s-audio# sudo insmod my_loader.ko
insmod: ERROR: could not insert module my_loader.ko: Unknown symbol in module

pi:~/rpi-i2s-audio# dmesg | tail
[ 67.839324] my_loader: loading out-of-tree module taints kernel.
[ 67.839637] my_loader: Unknown symbol __sanitizer_cov_trace_pc (err -2)

I guess, I have to modify something in the ~/rpi-i2s-audio/my_loader.c and compile it again [with make -C /lib/modules/$(uname -r )/build M=$(pwd) modules]. but what to modify ?

Any help please ?

Posts: 17
Joined: Thu Sep 27, 2018 9:52 am

Re: I2S mems microphone (SPH0645LM4H) installation issue : __sanitizer_cov_trace_pc

Tue Jul 02, 2019 3:32 am

Hi, I have also the same issue during (make -C /lib/modules/$(uname -r )/build M=$(pwd) modules) step:
WARNING "__sanitizer_cov_trace_pc" [/home/pi/rpi-i2s-audio/my_loader.ko] undefined!

Anybody know what's going on?

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