lneto
commented
8 months ago hi @endersonmaia, thanks for the report..
did the system recover itself or did it crash completely?
are you running another example altogether? I noticed this line (that is not related to systrack):
Mar 09 11:42:33.392989 debian-dev kernel: luathread: [00000000ae5213a3] attempt to call a string value
how many cores you have in this machine?
can you try this patch and run it for a while to observe if it will crash eventually?
diff --git a/examples/systrack.lua b/examples/systrack.lua
index 13a987d0..f7c537ef 100644
--- a/examples/systrack.lua
+++ b/examples/systrack.lua
@@ -23,28 +23,12 @@
local linux = require("linux")
local probe = require("probe")
-local device = require("device")
local syscall = require("syscall.table")
local track = {}
local function nop() end -- do nothing
-local s = linux.stat
-local driver = {name = "systrack", open = nop, release = nop, mode = s.IRUGO}
-
-local toggle = true
-function driver:read()
- local log = ""
- if toggle then
- for symbol, counter in pairs(track) do
- log = log .. string.format("%s: %d\n", symbol, counter)
- end
- end
- toggle = not toggle
- return log
-end
-
for symbol, address in pairs(syscall) do
local function handler()
track[symbol] = (track[symbol] or 0) + 1
@@ -53,5 +37,3 @@ for symbol, address in pairs(syscall) do
probe.new(address, {pre = handler, post = nop})
end
-device.new(driver)
-Notice, it will remove the device completely.. so, you won't be able to cat /dev/systrack, but it's alright.. it will still run.. I'm doing this to enable this script to avoid sleeping on locks.. then, please run it disabling sleep, in this way..
sudo make examples_install
sudo lunatik run examples/systrack falsethen, observe dmesg for at least the amount of time the bug was happening before.. thanks!
endersonmaia
glk0
When trying to run the
systrackexample, I cancat /dev/systracka couple of times but then the system breaks.My environment:
Full logs attached: systrack-dmesg.log
log snippet: