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Noux: Toggle syscall tracing via config

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Noux used to trace syscalls by default, which significantly slows down
its execution. This patch disables the tracing by default. It can be
enabled by specifying 'trace_syscalls="yes"' attribute to the Noux
configuration.
This commit is contained in:
Norman Feske 2012-08-17 23:40:15 +02:00
parent e60eb0f57f
commit 606ff66407
1 changed files with 12 additions and 36 deletions
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48
ports/src/noux/main.cc
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@ -11,34 +11,6 @@
* under the terms of the GNU General Public License version 2.
*/
/*
* TODO
*
* ;- Child class
* ;- Pass args and env to child
* ;- Receive args by child
* ;- run 'echo hello'
* ;- run 'seq 10'
* ;- skeleton of noux RPC interface
* ;- run 'pwd'
* ;- move _write->LOG to libc plugin
* ;- stdio (implementation of _write)
* ;- vfs
* ;- TAR file system
* ;- run 'ls -lRa' (dirent syscall)
* ;- run 'cat' (read syscall)
* ;- execve
* ;- fork
* ;- pipe
* ;- read init binary from vfs
* ;- import env into child (execve and fork)
* ;- shell
* - debug 'find'
* ;- stacked file system infrastructure
* ;- TMP file system
* ;- RAM service using a common quota pool
*/
/* Genode includes */
#include <cap_session/connection.h>
#include <os/config.h>
@ -53,7 +25,7 @@
#include <dir_file_system.h>
enum { verbose_syscall = true };
static bool trace_syscalls = false;
namespace Noux {
@ -64,20 +36,18 @@ namespace Noux {
void init_process_exited() { init_child = 0; }
};
extern "C" void wait_for_continue();
extern void (*close_socket)(int);
extern void init_network();
/*****************************
** Noux syscall dispatcher **
*****************************/
bool Noux::Child::syscall(Noux::Session::Syscall sc)
{
if (verbose_syscall)
if (trace_syscalls)
Genode::printf("PID %d -> SYSCALL %s\n",
pid(), Noux::Session::syscall_name(sc));
@ -476,9 +446,9 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
case SYSCALL_SHUTDOWN:
case SYSCALL_CONNECT:
case SYSCALL_GETADDRINFO:
{
return _syscall_net(sc);
}
return _syscall_net(sc);
case SYSCALL_INVALID: break;
}
}
@ -621,12 +591,18 @@ int main(int argc, char **argv)
static Genode::Cap_connection cap;
/* obtain global configuration */
try {
trace_syscalls = config()->xml_node().attribute("trace_syscalls").has_value("yes");
} catch (Xml_node::Nonexistent_attribute) { }
/* initialize virtual file system */
static Dir_file_system
root_dir(config()->xml_node().sub_node("fstab"));
/* initialize network */
init_network();
/*
* Entrypoint used to virtualize child resources such as RAM, RM
*/