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-rw-r--r--tools/perf/Makefile2
-rw-r--r--tools/perf/util/newt.c34
-rw-r--r--tools/perf/util/pstack.c75
-rw-r--r--tools/perf/util/pstack.h12
4 files changed, 120 insertions, 3 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 9c4dc30cdc13..a9281cca4114 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -416,6 +416,7 @@ LIB_H += util/thread.h
LIB_H += util/trace-event.h
LIB_H += util/probe-finder.h
LIB_H += util/probe-event.h
+LIB_H += util/pstack.h
LIB_H += util/cpumap.h
LIB_OBJS += $(OUTPUT)util/abspath.o
@@ -451,6 +452,7 @@ LIB_OBJS += $(OUTPUT)util/callchain.o
LIB_OBJS += $(OUTPUT)util/values.o
LIB_OBJS += $(OUTPUT)util/debug.o
LIB_OBJS += $(OUTPUT)util/map.o
+LIB_OBJS += $(OUTPUT)util/pstack.o
LIB_OBJS += $(OUTPUT)util/session.o
LIB_OBJS += $(OUTPUT)util/thread.o
LIB_OBJS += $(OUTPUT)util/trace-event-parse.o
diff --git a/tools/perf/util/newt.c b/tools/perf/util/newt.c
index 3402453812b3..e74df1240ef6 100644
--- a/tools/perf/util/newt.c
+++ b/tools/perf/util/newt.c
@@ -9,6 +9,7 @@
#include "cache.h"
#include "hist.h"
+#include "pstack.h"
#include "session.h"
#include "sort.h"
#include "symbol.h"
@@ -750,6 +751,7 @@ static int hist_browser__populate(struct hist_browser *self, struct hists *hists
newtFormAddHotKey(self->form, 'A');
newtFormAddHotKey(self->form, 'a');
newtFormAddHotKey(self->form, NEWT_KEY_RIGHT);
+ newtFormAddHotKey(self->form, NEWT_KEY_LEFT);
newtFormAddComponents(self->form, self->tree, NULL);
self->selection = newt__symbol_tree_get_current(self->tree);
@@ -801,6 +803,7 @@ static int hist_browser__title(char *bf, size_t size, const char *input_name,
int hists__browse(struct hists *self, const char *helpline, const char *input_name)
{
struct hist_browser *browser = hist_browser__new();
+ struct pstack *fstack = pstack__new(2);
const struct thread *thread_filter = NULL;
const struct dso *dso_filter = NULL;
struct newtExitStruct es;
@@ -810,12 +813,16 @@ int hists__browse(struct hists *self, const char *helpline, const char *input_na
if (browser == NULL)
return -1;
+ fstack = pstack__new(2);
+ if (fstack == NULL)
+ goto out;
+
ui_helpline__push(helpline);
hist_browser__title(msg, sizeof(msg), input_name,
dso_filter, thread_filter);
if (hist_browser__populate(browser, self, msg) < 0)
- goto out;
+ goto out_free_stack;
while (1) {
const struct thread *thread;
@@ -836,6 +843,19 @@ int hists__browse(struct hists *self, const char *helpline, const char *input_na
else
continue;
}
+
+ if (es.u.key == NEWT_KEY_LEFT) {
+ const void *top;
+
+ if (pstack__empty(fstack))
+ continue;
+ top = pstack__pop(fstack);
+ if (top == &dso_filter)
+ goto zoom_out_dso;
+ if (top == &thread_filter)
+ goto zoom_out_thread;
+ continue;
+ }
}
if (browser->selection->sym != NULL &&
@@ -888,12 +908,15 @@ do_annotate:
hist_entry__annotate_browser(he);
} else if (choice == zoom_dso) {
if (dso_filter) {
+ pstack__remove(fstack, &dso_filter);
+zoom_out_dso:
ui_helpline__pop();
dso_filter = NULL;
} else {
- ui_helpline__fpush("To zoom out press -> + \"Zoom out of %s DSO\"",
+ ui_helpline__fpush("To zoom out press <- or -> + \"Zoom out of %s DSO\"",
dso->kernel ? "the Kernel" : dso->short_name);
dso_filter = dso;
+ pstack__push(fstack, &dso_filter);
}
hists__filter_by_dso(self, dso_filter);
hist_browser__title(msg, sizeof(msg), input_name,
@@ -902,13 +925,16 @@ do_annotate:
goto out;
} else if (choice == zoom_thread) {
if (thread_filter) {
+ pstack__remove(fstack, &thread_filter);
+zoom_out_thread:
ui_helpline__pop();
thread_filter = NULL;
} else {
- ui_helpline__fpush("To zoom out press -> + \"Zoom out of %s(%d) thread\"",
+ ui_helpline__fpush("To zoom out press <- or -> + \"Zoom out of %s(%d) thread\"",
thread->comm_set ? thread->comm : "",
thread->pid);
thread_filter = thread;
+ pstack__push(fstack, &thread_filter);
}
hists__filter_by_thread(self, thread_filter);
hist_browser__title(msg, sizeof(msg), input_name,
@@ -918,6 +944,8 @@ do_annotate:
}
}
err = 0;
+out_free_stack:
+ pstack__delete(fstack);
out:
hist_browser__delete(browser);
return err;
diff --git a/tools/perf/util/pstack.c b/tools/perf/util/pstack.c
new file mode 100644
index 000000000000..13d36faf64eb
--- /dev/null
+++ b/tools/perf/util/pstack.c
@@ -0,0 +1,75 @@
+/*
+ * Simple pointer stack
+ *
+ * (c) 2010 Arnaldo Carvalho de Melo <acme@redhat.com>
+ */
+
+#include "util.h"
+#include "pstack.h"
+#include <linux/kernel.h>
+#include <stdlib.h>
+
+struct pstack {
+ unsigned short top;
+ unsigned short max_nr_entries;
+ void *entries[0];
+};
+
+struct pstack *pstack__new(unsigned short max_nr_entries)
+{
+ struct pstack *self = zalloc((sizeof(*self) +
+ max_nr_entries * sizeof(void *)));
+ if (self != NULL)
+ self->max_nr_entries = max_nr_entries;
+ return self;
+}
+
+void pstack__delete(struct pstack *self)
+{
+ free(self);
+}
+
+bool pstack__empty(const struct pstack *self)
+{
+ return self->top == 0;
+}
+
+void pstack__remove(struct pstack *self, void *key)
+{
+ unsigned short i = self->top, last_index = self->top - 1;
+
+ while (i-- != 0) {
+ if (self->entries[i] == key) {
+ if (i < last_index)
+ memmove(self->entries + i,
+ self->entries + i + 1,
+ (last_index - i) * sizeof(void *));
+ --self->top;
+ return;
+ }
+ }
+ pr_err("%s: %p not on the pstack!\n", __func__, key);
+}
+
+void pstack__push(struct pstack *self, void *key)
+{
+ if (self->top == self->max_nr_entries) {
+ pr_err("%s: top=%d, overflow!\n", __func__, self->top);
+ return;
+ }
+ self->entries[self->top++] = key;
+}
+
+void *pstack__pop(struct pstack *self)
+{
+ void *ret;
+
+ if (self->top == 0) {
+ pr_err("%s: underflow!\n", __func__);
+ return NULL;
+ }
+
+ ret = self->entries[--self->top];
+ self->entries[self->top] = NULL;
+ return ret;
+}
diff --git a/tools/perf/util/pstack.h b/tools/perf/util/pstack.h
new file mode 100644
index 000000000000..5ad07023504b
--- /dev/null
+++ b/tools/perf/util/pstack.h
@@ -0,0 +1,12 @@
+#ifndef _PERF_PSTACK_
+#define _PERF_PSTACK_
+
+struct pstack;
+struct pstack *pstack__new(unsigned short max_nr_entries);
+void pstack__delete(struct pstack *self);
+bool pstack__empty(const struct pstack *self);
+void pstack__remove(struct pstack *self, void *key);
+void pstack__push(struct pstack *self, void *key);
+void *pstack__pop(struct pstack *self);
+
+#endif /* _PERF_PSTACK_ */
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