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#include "cache.h"
#include "strbuf.h"
#include "strvec.h"
#include "trace2.h"
static void get_ancestry_names(struct strvec *names)
{
/*
* NEEDSWORK: We could gather the entire pstree into an array to match
* functionality with compat/win32/trace2_win32_process_info.c.
* To do so, we may want to examine /proc/<pid>/stat. For now, just
* gather the immediate parent name which is readily accessible from
* /proc/$(getppid())/comm.
*/
struct strbuf procfs_path = STRBUF_INIT;
struct strbuf name = STRBUF_INIT;
/* try to use procfs if it's present. */
strbuf_addf(&procfs_path, "/proc/%d/comm", getppid());
if (strbuf_read_file(&name, procfs_path.buf, 0)) {
strbuf_release(&procfs_path);
strbuf_trim_trailing_newline(&name);
strvec_push(names, strbuf_detach(&name, NULL));
}
return;
/* NEEDSWORK: add non-procfs-linux implementations here */
}
void trace2_collect_process_info(enum trace2_process_info_reason reason)
{
if (!trace2_is_enabled())
return;
/* someday we may want to write something extra here, but not today */
if (reason == TRACE2_PROCESS_INFO_EXIT)
return;
if (reason == TRACE2_PROCESS_INFO_STARTUP) {
/*
* NEEDSWORK: we could do the entire ptree in an array instead,
* see compat/win32/trace2_win32_process_info.c.
*/
struct strvec names = STRVEC_INIT;
get_ancestry_names(&names);
if (names.nr)
trace2_cmd_ancestry(names.v);
strvec_clear(&names);
}
return;
}
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