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Forgive my English.
I copied the LinuxKernelDebugHelper code to reproduce the problem
root@ubuntu:~/4.0# uname -rs Linux 4.19.141 root@ubuntu:~/4.0# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.1 LTS Release: 18.04 Codename: bionic root@ubuntu:~/4.0# sh configure.sh /lib/modules/$(uname -r)/build Configuring KernelDebugHelper module. Checking layout of 'struct module'... Checking path to stdarg.h... root@ubuntu:~/4.0# make -C /lib/modules/$(uname -r)/build M=$(pwd) modules make: Enter "/usr/src/linux-4.19.141" CC [M] /root/4.0/AppendableBuffer.o CC [M] /root/4.0/LinuxKernelDebugHelper_main.o CC [M] /root/4.0/SequentialModuleInfo.o CC [M] /root/4.0/LiveMemoryEngine.o /root/4.0/LiveMemoryEngine.c: In function ‘LiveMemoryEngineThread’: /root/4.0/LiveMemoryEngine.c:210:1: warning: the frame size of 1672 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ^ CC [M] /root/4.0/TraceEngine.o /root/4.0/TraceEngine.c: In function ‘TraceEngineSendThread’: /root/4.0/TraceEngine.c:519:24: error: implicit declaration of function ‘jiffies64_to_msecs’; did you mean ‘jiffies64_to_nsecs’? [-Werror=implicit-function-declaration] uint32_t timestamp = jiffies64_to_msecs(get_jiffies_64() - startTime) & kSendTimeMask; ^~~~~~~~~~~~~~~~~~ jiffies64_to_nsecs /root/4.0/TraceEngine.c:534:7: error: implicit declaration of function ‘kthread_should_stop’ [-Werror=implicit-function-declaration] if (kthread_should_stop()) ^~~~~~~~~~~~~~~~~~~ /root/4.0/TraceEngine.c: In function ‘TraceEngineEndTracing’: /root/4.0/TraceEngine.c:908:3: error: implicit declaration of function ‘kthread_stop’; did you mean ‘ether_setup’? [-Werror=implicit-function-declaration] kthread_stop(engine->TraceThread); ^~~~~~~~~~~~ ether_setup /root/4.0/TraceEngine.c: In function ‘TraceEngineStartTracing’: /root/4.0/TraceEngine.c:1004:25: error: implicit declaration of function ‘kthread_run’; did you mean ‘it_real_fn’? [-Werror=implicit-function-declaration] engine->TraceThread = kthread_run(TraceEngineSendThread, engine, "Trace data sending thread"); ^~~~~~~~~~~ it_real_fn /root/4.0/TraceEngine.c:1004:23: warning: assignment makes pointer from integer without a cast [-Wint-conversion] engine->TraceThread = kthread_run(TraceEngineSendThread, engine, "Trace data sending thread"); ^ /root/4.0/TraceEngine.c: At top level: /root/4.0/TraceEngine.c:1155:109: warning: ‘struct ftrace_regs’ declared inside parameter list will not be visible outside of this definition or declaration static notrace void FTraceHookImpl(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op, struct ftrace_reg *regs) ^~~~~~~~~~ /root/4.0/TraceEngine.c: In function ‘ApplyTracepointState’: /root/4.0/TraceEngine.c:1230:34: error: assignment from incompatible pointer type [-Werror=incompatible-pointer-types] tp->AddressBased.FTrace.func = &FTraceHookImpl; ^ /root/4.0/TraceEngine.c: In function ‘ValidateMemoryRange’: /root/4.0/TraceEngine.c:1745:8: error: implicit declaration of function ‘copy_from_user_nofault’; did you mean ‘copy_from_user_nmi’? [-Werror=implicit-function-declaration] if (copy_from_user_nofault(&tmp, (const void *)page, sizeof(void *)) < 0) ^~~~~~~~~~~~~~~~~~~~~~ copy_from_user_nmi At top level: /root/4.0/TraceEngine.c:764:44: warning: always_inline function might not be inlinable [-Wattributes] static bool __attribute__((always_inline)) TraceEngineRollbackWrite(struct TraceTransaction *transaction, size_t size) ^~~~~~~~~~~~~~~~~~~~~~~~ /root/4.0/TraceEngine.c:751:46: warning: always_inline function might not be inlinable [-Wattributes] static void * __attribute__((always_inline)) TraceEnginePrepareForWrite(struct TraceTransaction *transaction, size_t size) ^~~~~~~~~~~~~~~~~~~~~~~~~~ /root/4.0/TraceEngine.c: In function ‘TraceEngineSendThread’: /root/4.0/TraceEngine.c:686:1: warning: the frame size of 1576 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ^ cc1: some warnings being treated as errors scripts/Makefile.build:303: recipe for target '/root/4.0/TraceEngine.o' failed make[1]: *** [/root/4.0/TraceEngine.o] Error 1 Makefile:1530: recipe for target '_module_/root/4.0' failed make: *** [_module_/root/4.0] Error 2How to solve it ?
Hi,
These errors come from the recently introduced Live Tracing engine that indeed was not tested with the older kernels (it works just fine with the recent 5.x versions though).
We have updated VisualKernel to automatically detect it and turn off the tracing engine if it detects an incompatible kernel. Please try this build: VisualKernel-4.0.101.2361.msi
If you would like to use Live Tracing on an older kernel, we can gladly backport it for you as long as you purchase a Standard VisualKernel license. If you would like to evaluate Live Tracing before purchasing, you can try it out on a more recent 5.x kernel (stock kernels coming with most Linux distros will work just fine).
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