This repo is a simple test for multithreading on qemu with usermode emulation. Testing was done with an x86 host and a ppc guest, but it should be trivial to convert these files to work on other architectures.
- make
- gdb-multiarch (compiled with python3)
- qemu-ppc (or whatever guest arch you use)
- powerpc-linux-gnu-gcc-9 (or whatever guest compiler you use)
First you should get/build qemu-ppc, then:
- Run
make ppcto create guest binary
- Run
QEMU_GDB=5555 QEMU_CPU=ppc gdb-multiarch qemu-ppc --command=./parent_gdbscript.py - In another terminal run
gdb-multiarch --command=./gdbscript.py - You should see both scripts running and printing out threads waiting to join. A file called qemulog.txt will also be generated with all of the logging of gdbstub messages send and recieved by qemu-ppc.
- To enable logging of the gdb messages in the guest process as well, uncomment
the line
#gdb.execute("set debug remote 1")in gdbscript.py