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Propagate process labels to PD sessions

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On Linux, we use the session label for naming the corresponding Linux
process. When looking up the processes via 'ps', the Genode process
hierarchy becomes immediately visible.
This commit is contained in:
Norman Feske
2012-10-11 20:57:10 +02:00
parent 97162332c9
commit db2b1a37ae
8 changed files with 32 additions and 34 deletions
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5
base-linux/src/base/process/process.cc
View File

@ -57,9 +57,10 @@ Process::Process(Dataspace_capability elf_data_ds_cap,
Cpu_session_capability cpu_session_cap,
Rm_session_capability rm_session_cap,
Parent_capability parent_cap,
const char *name,
char const *name,
char *const argv[])
:
_pd(name),
_cpu_session_client(Cpu_session_capability()),
_rm_session_client(Rm_session_capability())
{
@ -75,7 +76,7 @@ Process::Process(Dataspace_capability elf_data_ds_cap,
Linux_pd_session_client lx_pd(static_cap_cast<Linux_pd_session>(_pd.cap()));
lx_pd.assign_parent(parent_cap);
lx_pd.start(elf_data_ds_cap, name);
lx_pd.start(elf_data_ds_cap);
}

5
base-linux/src/core/include/pd_session_component.h
View File

@ -27,7 +27,10 @@ namespace Genode {
{
private:
enum { LABEL_MAX_LEN = 1024 };
unsigned long _pid;
char _label[LABEL_MAX_LEN];
Parent_capability _parent;
Rpc_entrypoint *_ds_ep;
@ -55,7 +58,7 @@ namespace Genode {
** Linux-specific extension **
******************************/
void start(Capability<Dataspace> binary, Name const &name);
void start(Capability<Dataspace> binary);
};
}

20
base-linux/src/core/pd_session_component.cc
View File

@ -12,6 +12,7 @@
*/
/* Genode includes */
#include <util/arg_string.h>
#include <base/printf.h>
#include <base/snprintf.h>
@ -78,8 +79,13 @@ static const char *get_env(const char *key)
** PD session interface **
**************************/
Pd_session_component::Pd_session_component(Rpc_entrypoint *ds_ep, const char *)
: _pid(0), _ds_ep(ds_ep) { }
Pd_session_component::Pd_session_component(Rpc_entrypoint *ep, const char *args)
:
_pid(0), _ds_ep(ep)
{
Arg_string::find_arg(args, "label").string(_label, sizeof(_label),
"<unlabeled>");
}
Pd_session_component::~Pd_session_component()
@ -100,10 +106,11 @@ int Pd_session_component::assign_parent(Parent_capability parent)
}
void Pd_session_component::start(Capability<Dataspace> binary, Name const &name)
void Pd_session_component::start(Capability<Dataspace> binary)
{
/* lookup binary dataspace */
Dataspace_component *ds = reinterpret_cast<Dataspace_component *>(_ds_ep->obj_by_cap(binary));
Dataspace_component *ds =
reinterpret_cast<Dataspace_component *>(_ds_ep->obj_by_cap(binary));
if (!ds) {
PERR("could not lookup binary, aborted PD startup");
@ -128,8 +135,9 @@ void Pd_session_component::start(Capability<Dataspace> binary, Name const &name)
&envbuf[3][0], &envbuf[4][0], 0 };
/* prefix name of Linux program (helps killing some zombies) */
char pname_buf[9 + Linux_dataspace::FNAME_LEN];
snprintf(pname_buf, sizeof(pname_buf), "[Genode] %s", name.string());
char const *prefix = "[Genode] ";
char pname_buf[sizeof(_label) + sizeof(prefix)];
snprintf(pname_buf, sizeof(pname_buf), "%s%s", prefix, _label);
char *argv_buf[2];
argv_buf[0] = pname_buf;
argv_buf[1] = 0;