Sets the logging backtrace location. When a backtrace location is set and a log message is emitted at that location, the stack of the goroutine executing the log statement will be printed to stderr
.
Client | Method Invocation |
Console |
|
RPC |
|
Parameters
Name | Type | Description |
location | string | The logging backtrace location specified as |
Return Value
None
Example
> debug.backtraceAt("server.go:443")null
HTTP RPC
$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_backtraceAt","params":["server.go:443"],"id":1}' http://localhost:8551{"jsonrpc":"2.0","id":1,"result":null}
Sets the output target of vmlog precompiled contract. When the output target is a file, logs from vmlog
calls in smart contracts will be written to DATADIR/log/vm.log
. Here DATADIR
is the directory specified by --datadir
when launching klay
. On the other hand, the output target is stdout
, logs will be displayed like a debug message on the standard output.
Client | Method Invocation |
Console |
|
RPC |
|
Parameters
Name | Type | Description |
target | int | The output target (0: no output, 1: file, 2: stdout, 3: both) (default: 0) |
Return Value
Type | Description |
string | The output target. See the examples below for the actual return values. |
Example
Console
> debug.setVMLogTarget(0)"no output"​> debug.setVMLogTarget(1)"file"​> debug.setVMLogTarget(2)"stdout"​> debug.setVMLogTarget(3)"both file and stdout"​> debug.setVMLogTarget(4)Error: target should be between 0 and 3at web3.js:3239:20at web3.js:6447:15at web3.js:5181:36at <anonymous>:1:1
HTTP RPC
$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_setVMLogTarget","params":[3],"id":1}' http://localhost:8551{"jsonrpc":"2.0","id":1,"result":"both file and stdout"}
Sets the logging verbosity ceiling. Log messages with level up to and including the given level will be printed.
(Level : 0=silent, 1=error, 2=warn, 3=info, 4=debug, 5=detail)
The verbosity of individual packages and source files can be raised using debug_vmodule
.
Client | Method Invocation |
Console |
|
RPC |
|
Parameters
Name | Type | Description |
level | int | The logging verbosity level. |
Return Value
None
Example
Console
> debug.verbosity(3)null
HTTP RPC
$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_verbosity","params":['3'],"id":1}' http://localhost:8551{"jsonrpc":"2.0","id":1,"result":null}
Sets the logging verbosity pattern.
Client | Method Invocation |
Console |
|
RPC |
|
Parameters
Name | Type | Description |
module | string | The module name for logging. |
Return Value
None
Example
Console
If you want to see messages from a particular Go package (directory) and all subdirectories, use
> debug.vmodule("p2p/*=5")
If you want to restrict messages to a particular package (e.g., p2p) but exclude subdirectories, use
> debug.vmodule("p2p=4")
If you want to see log messages from a particular source file, use
> debug.vmodule("server.go=3")
HTTP RPC
$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_vmodule","params":["p2p=4"],"id":1}' http://localhost:8551{"jsonrpc":"2.0","id":1,"result":null}