From 270520b4a2eac8725c8575c3180964289722e191 Mon Sep 17 00:00:00 2001 From: John Ogness Date: Tue, 19 Dec 2017 10:59:40 +0100 Subject: schulung_tools: add various demos and tools Different tools have been used by various trainers as demos. Put all these into master so they are available to all trainers. ipc_pipe: ipc demo using pipes ipc_shm: ipc demo using shared memory libduma: source and instructions for compiling libduma matrix: demo of good and bad cache access mtrace: patch and infos for using mtrace with ASLR rtex: demo of handling page faults Signed-off-by: John Ogness --- schulung_tools/ipc_shm/README | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 schulung_tools/ipc_shm/README (limited to 'schulung_tools/ipc_shm/README') diff --git a/schulung_tools/ipc_shm/README b/schulung_tools/ipc_shm/README new file mode 100644 index 0000000..bea6c98 --- /dev/null +++ b/schulung_tools/ipc_shm/README @@ -0,0 +1,30 @@ +#!/bin/sh + +# build programs send/recv +make + +# find uprobe offsets (search for "uprobe") +objdump -D -F -S send | less +objdump -D -F -S recv | less + +# create uprobe events (as root) +echo "p:sending `pwd`/send:0x1055" > /sys/kernel/debug/tracing/uprobe_events +echo "p:received `pwd`/recv:0xff1" >> /sys/kernel/debug/tracing/uprobe_events + +# run receiver +sudo taskset 1 chrt -f 80 ./recv & + +# run sender (wrapping with trace-cmd) +sudo trace-cmd record \ + -e sched:sched_switch \ + -e sched:sched_wakeup \ + -e sched:sched_pi_setprio \ + -e uprobes:sending \ + -e uprobes:received \ + -e raw_syscalls:sys_enter \ + -e raw_syscalls:sys_exit \ + taskset 1 chrt -f 70 ./send +(type message and hit return) + +# view results +kernelshark -- cgit v1.2.3