Tracing execution of Lua Sripts
1
I know you can use the debug library of lua to get some tracing info/debugging. But the information is in pieces. So I am wondering if there is a way to trace the execution of a Lua script. A step by step process. it would be required and it will automatically go thru at every execution step To produce a report such as the following;
Called: function xyz from : Table abc
It has n parameters
Param 1: apples
Param 2: oranges
.
.
It has m returns
return 1: red
return 2: yellow
.
.
Called: function xyz2 from : Table abc2
It has n parameters
Param 1: pears
Param 2: bananas
.
.
It has m reruns
return 1: heavy
return 2: light
.
.
and so on....
debugging lua trace
asked Nov 20 at 18:13
Dave Kay
505
add a comment |
1
I know you can use the debug library of lua to get some tracing info/debugging. But the information is in pieces. So I am wondering if there is a way to trace the execution of a Lua script. A step by step process. it would be required and it will automatically go thru at every execution step To produce a report such as the following;
Called: function xyz from : Table abc
It has n parameters
Param 1: apples
Param 2: oranges
.
.
It has m returns
return 1: red
return 2: yellow
.
.
Called: function xyz2 from : Table abc2
It has n parameters
Param 1: pears
Param 2: bananas
.
.
It has m reruns
return 1: heavy
return 2: light
.
.
and so on....
debugging lua trace
asked Nov 20 at 18:13
Dave Kay
505
add a comment |
1
1
1
0
I know you can use the debug library of lua to get some tracing info/debugging. But the information is in pieces. So I am wondering if there is a way to trace the execution of a Lua script. A step by step process. it would be required and it will automatically go thru at every execution step To produce a report such as the following;
Called: function xyz from : Table abc
It has n parameters
Param 1: apples
Param 2: oranges
.
.
It has m returns
return 1: red
return 2: yellow
.
.
Called: function xyz2 from : Table abc2
It has n parameters
Param 1: pears
Param 2: bananas
.
.
It has m reruns
return 1: heavy
return 2: light
.
.
and so on....
debugging lua trace
asked Nov 20 at 18:13
Dave Kay
505
I know you can use the debug library of lua to get some tracing info/debugging. But the information is in pieces. So I am wondering if there is a way to trace the execution of a Lua script. A step by step process. it would be required and it will automatically go thru at every execution step To produce a report such as the following;
Called: function xyz from : Table abc
It has n parameters
Param 1: apples
Param 2: oranges
.
.
It has m returns
return 1: red
return 2: yellow
.
.
Called: function xyz2 from : Table abc2
It has n parameters
Param 1: pears
Param 2: bananas
.
.
It has m reruns
return 1: heavy
return 2: light
.
.
and so on....
debugging lua trace
debugging lua trace
asked Nov 20 at 18:13
Dave Kay
505
asked Nov 20 at 18:13
Dave Kay
505
edited Nov 20 at 18:18
asked Nov 20 at 18:13
Dave Kay
505
asked Nov 20 at 18:13
Dave Kay
505
asked Nov 20 at 18:13
Dave Kay
505
505
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
2
Here is some code that used to be distributed in the Lua tarball. It's from 2005 and still works fine.
-- trace calls
-- example: lua -ltrace-calls bisect.lua
local level=0
local function hook(event)
local t=debug.getinfo(3)
io.write(level," >>> ",string.rep(" ",level))
if t~=nil and t.currentline>=0 then io.write(t.short_src,":",t.currentline," ") end
t=debug.getinfo(2)
if event=="call" then
level=level+1
else
level=level-1 if level<0 then level=0 end
end
if t.what=="main" then
if event=="call" then
io.write("begin ",t.short_src)
else
io.write("end ",t.short_src)
end
elseif t.what=="Lua" then
io.write(event," ",t.name or "(Lua)"," <",t.linedefined,":",t.short_src,">")
else
io.write(event," ",t.name or "(C)"," [",t.what,"] ")
end
io.write("n")
end
debug.sethook(hook,"cr")
level=0
answered Nov 20 at 18:47
lhf
55.6k667103
This is great, thank you. Any idea how to capture the function arguments, return values and which table we are in at the moment?
– Dave Kay
Nov 20 at 23:31
why is it that if I add anything even a simple print statement, the whole thing falls apart. I placed print(t.name) after the line t=debug.getinfo(2) and the output fell apart. I am using zerobrane. Lua 5.1. I tried replacing io.write with print everywhere and that messed up everything as well. I have zero experience with io.write
– Dave Kay
Nov 21 at 7:25
@DaveKay, becauseprintadds a newline andio.writedoes not.
– lhf
Nov 21 at 10:13
@Ihf, Then how does one debug lua? embedded in C/C++ engine. Where one has no access to the engine and can not do remote debugging for variety of reasons. I mean of'course other than putting print statements everywhere (cause that's what I am literally doing now). There's got to be some trace script somewhere that can trace execution of lua scripts and produce a report
– Dave Kay
Nov 25 at 2:38
add a comment |
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1 Answer
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2
Here is some code that used to be distributed in the Lua tarball. It's from 2005 and still works fine.
-- trace calls
-- example: lua -ltrace-calls bisect.lua
local level=0
local function hook(event)
local t=debug.getinfo(3)
io.write(level," >>> ",string.rep(" ",level))
if t~=nil and t.currentline>=0 then io.write(t.short_src,":",t.currentline," ") end
t=debug.getinfo(2)
if event=="call" then
level=level+1
else
level=level-1 if level<0 then level=0 end
end
if t.what=="main" then
if event=="call" then
io.write("begin ",t.short_src)
else
io.write("end ",t.short_src)
end
elseif t.what=="Lua" then
io.write(event," ",t.name or "(Lua)"," <",t.linedefined,":",t.short_src,">")
else
io.write(event," ",t.name or "(C)"," [",t.what,"] ")
end
io.write("n")
end
debug.sethook(hook,"cr")
level=0
answered Nov 20 at 18:47
lhf
55.6k667103
This is great, thank you. Any idea how to capture the function arguments, return values and which table we are in at the moment?
– Dave Kay
Nov 20 at 23:31
why is it that if I add anything even a simple print statement, the whole thing falls apart. I placed print(t.name) after the line t=debug.getinfo(2) and the output fell apart. I am using zerobrane. Lua 5.1. I tried replacing io.write with print everywhere and that messed up everything as well. I have zero experience with io.write
– Dave Kay
Nov 21 at 7:25
@DaveKay, becauseprintadds a newline andio.writedoes not.
– lhf
Nov 21 at 10:13
@Ihf, Then how does one debug lua? embedded in C/C++ engine. Where one has no access to the engine and can not do remote debugging for variety of reasons. I mean of'course other than putting print statements everywhere (cause that's what I am literally doing now). There's got to be some trace script somewhere that can trace execution of lua scripts and produce a report
– Dave Kay
Nov 25 at 2:38
add a comment |
2
Here is some code that used to be distributed in the Lua tarball. It's from 2005 and still works fine.
-- trace calls
-- example: lua -ltrace-calls bisect.lua
local level=0
local function hook(event)
local t=debug.getinfo(3)
io.write(level," >>> ",string.rep(" ",level))
if t~=nil and t.currentline>=0 then io.write(t.short_src,":",t.currentline," ") end
t=debug.getinfo(2)
if event=="call" then
level=level+1
else
level=level-1 if level<0 then level=0 end
end
if t.what=="main" then
if event=="call" then
io.write("begin ",t.short_src)
else
io.write("end ",t.short_src)
end
elseif t.what=="Lua" then
io.write(event," ",t.name or "(Lua)"," <",t.linedefined,":",t.short_src,">")
else
io.write(event," ",t.name or "(C)"," [",t.what,"] ")
end
io.write("n")
end
debug.sethook(hook,"cr")
level=0
answered Nov 20 at 18:47
lhf
55.6k667103
This is great, thank you. Any idea how to capture the function arguments, return values and which table we are in at the moment?
– Dave Kay
Nov 20 at 23:31
why is it that if I add anything even a simple print statement, the whole thing falls apart. I placed print(t.name) after the line t=debug.getinfo(2) and the output fell apart. I am using zerobrane. Lua 5.1. I tried replacing io.write with print everywhere and that messed up everything as well. I have zero experience with io.write
– Dave Kay
Nov 21 at 7:25
@DaveKay, becauseprintadds a newline andio.writedoes not.
– lhf
Nov 21 at 10:13
@Ihf, Then how does one debug lua? embedded in C/C++ engine. Where one has no access to the engine and can not do remote debugging for variety of reasons. I mean of'course other than putting print statements everywhere (cause that's what I am literally doing now). There's got to be some trace script somewhere that can trace execution of lua scripts and produce a report
– Dave Kay
Nov 25 at 2:38
add a comment |
2
2
2
Here is some code that used to be distributed in the Lua tarball. It's from 2005 and still works fine.
-- trace calls
-- example: lua -ltrace-calls bisect.lua
local level=0
local function hook(event)
local t=debug.getinfo(3)
io.write(level," >>> ",string.rep(" ",level))
if t~=nil and t.currentline>=0 then io.write(t.short_src,":",t.currentline," ") end
t=debug.getinfo(2)
if event=="call" then
level=level+1
else
level=level-1 if level<0 then level=0 end
end
if t.what=="main" then
if event=="call" then
io.write("begin ",t.short_src)
else
io.write("end ",t.short_src)
end
elseif t.what=="Lua" then
io.write(event," ",t.name or "(Lua)"," <",t.linedefined,":",t.short_src,">")
else
io.write(event," ",t.name or "(C)"," [",t.what,"] ")
end
io.write("n")
end
debug.sethook(hook,"cr")
level=0
answered Nov 20 at 18:47
lhf
55.6k667103
Here is some code that used to be distributed in the Lua tarball. It's from 2005 and still works fine.
-- trace calls
-- example: lua -ltrace-calls bisect.lua
local level=0
local function hook(event)
local t=debug.getinfo(3)
io.write(level," >>> ",string.rep(" ",level))
if t~=nil and t.currentline>=0 then io.write(t.short_src,":",t.currentline," ") end
t=debug.getinfo(2)
if event=="call" then
level=level+1
else
level=level-1 if level<0 then level=0 end
end
if t.what=="main" then
if event=="call" then
io.write("begin ",t.short_src)
else
io.write("end ",t.short_src)
end
elseif t.what=="Lua" then
io.write(event," ",t.name or "(Lua)"," <",t.linedefined,":",t.short_src,">")
else
io.write(event," ",t.name or "(C)"," [",t.what,"] ")
end
io.write("n")
end
debug.sethook(hook,"cr")
level=0
answered Nov 20 at 18:47
lhf
55.6k667103
answered Nov 20 at 18:47
lhf
55.6k667103
answered Nov 20 at 18:47
lhf
55.6k667103
answered Nov 20 at 18:47
lhf
55.6k667103
55.6k667103
This is great, thank you. Any idea how to capture the function arguments, return values and which table we are in at the moment?
– Dave Kay
Nov 20 at 23:31
why is it that if I add anything even a simple print statement, the whole thing falls apart. I placed print(t.name) after the line t=debug.getinfo(2) and the output fell apart. I am using zerobrane. Lua 5.1. I tried replacing io.write with print everywhere and that messed up everything as well. I have zero experience with io.write
– Dave Kay
Nov 21 at 7:25
@DaveKay, becauseprintadds a newline andio.writedoes not.
– lhf
Nov 21 at 10:13
@Ihf, Then how does one debug lua? embedded in C/C++ engine. Where one has no access to the engine and can not do remote debugging for variety of reasons. I mean of'course other than putting print statements everywhere (cause that's what I am literally doing now). There's got to be some trace script somewhere that can trace execution of lua scripts and produce a report
– Dave Kay
Nov 25 at 2:38
add a comment |
This is great, thank you. Any idea how to capture the function arguments, return values and which table we are in at the moment?
– Dave Kay
Nov 20 at 23:31
why is it that if I add anything even a simple print statement, the whole thing falls apart. I placed print(t.name) after the line t=debug.getinfo(2) and the output fell apart. I am using zerobrane. Lua 5.1. I tried replacing io.write with print everywhere and that messed up everything as well. I have zero experience with io.write
– Dave Kay
Nov 21 at 7:25
@DaveKay, becauseprintadds a newline andio.writedoes not.
– lhf
Nov 21 at 10:13
@Ihf, Then how does one debug lua? embedded in C/C++ engine. Where one has no access to the engine and can not do remote debugging for variety of reasons. I mean of'course other than putting print statements everywhere (cause that's what I am literally doing now). There's got to be some trace script somewhere that can trace execution of lua scripts and produce a report
– Dave Kay
Nov 25 at 2:38
This is great, thank you. Any idea how to capture the function arguments, return values and which table we are in at the moment?
– Dave Kay
Nov 20 at 23:31
This is great, thank you. Any idea how to capture the function arguments, return values and which table we are in at the moment?
– Dave Kay
Nov 20 at 23:31
why is it that if I add anything even a simple print statement, the whole thing falls apart. I placed print(t.name) after the line t=debug.getinfo(2) and the output fell apart. I am using zerobrane. Lua 5.1. I tried replacing io.write with print everywhere and that messed up everything as well. I have zero experience with io.write
– Dave Kay
Nov 21 at 7:25
why is it that if I add anything even a simple print statement, the whole thing falls apart. I placed print(t.name) after the line t=debug.getinfo(2) and the output fell apart. I am using zerobrane. Lua 5.1. I tried replacing io.write with print everywhere and that messed up everything as well. I have zero experience with io.write
– Dave Kay
Nov 21 at 7:25
@DaveKay, because
print adds a newline and io.write does not.– lhf
Nov 21 at 10:13
@DaveKay, because
print adds a newline and io.write does not.– lhf
Nov 21 at 10:13
@Ihf, Then how does one debug lua? embedded in C/C++ engine. Where one has no access to the engine and can not do remote debugging for variety of reasons. I mean of'course other than putting print statements everywhere (cause that's what I am literally doing now). There's got to be some trace script somewhere that can trace execution of lua scripts and produce a report
– Dave Kay
Nov 25 at 2:38
@Ihf, Then how does one debug lua? embedded in C/C++ engine. Where one has no access to the engine and can not do remote debugging for variety of reasons. I mean of'course other than putting print statements everywhere (cause that's what I am literally doing now). There's got to be some trace script somewhere that can trace execution of lua scripts and produce a report
– Dave Kay
Nov 25 at 2:38
add a comment |
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