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-rwxr-xr-xtools/nfsd/inject_fault.sh49
-rw-r--r--tools/perf/Documentation/perf-list.txt2
-rw-r--r--tools/perf/MANIFEST1
-rw-r--r--tools/perf/builtin-annotate.c7
-rw-r--r--tools/perf/builtin-kmem.c3
-rw-r--r--tools/perf/builtin-kvm.c6
-rw-r--r--tools/perf/builtin-script.c4
-rw-r--r--tools/perf/builtin-test.c2
-rw-r--r--tools/perf/builtin-top.c5
-rw-r--r--tools/perf/util/evlist.c5
-rw-r--r--tools/perf/util/hist.c131
-rw-r--r--tools/perf/util/hist.h7
-rw-r--r--tools/perf/util/parse-events.c15
-rw-r--r--tools/perf/util/trace-event-info.c1
-rw-r--r--tools/perf/util/util.c15
-rw-r--r--tools/perf/util/util.h4
-rw-r--r--tools/testing/selftests/Makefile11
-rw-r--r--tools/testing/selftests/breakpoints/Makefile20
-rw-r--r--tools/testing/selftests/breakpoints/breakpoint_test.c394
-rw-r--r--tools/testing/selftests/run_tests8
20 files changed, 606 insertions, 84 deletions
diff --git a/tools/nfsd/inject_fault.sh b/tools/nfsd/inject_fault.sh
new file mode 100755
index 000000000000..06a399ac8b2f
--- /dev/null
+++ b/tools/nfsd/inject_fault.sh
@@ -0,0 +1,49 @@
+#!/bin/bash
+#
+# Copyright (c) 2011 Bryan Schumaker <bjschuma@netapp.com>
+#
+# Script for easier NFSD fault injection
+
+# Check that debugfs has been mounted
+DEBUGFS=`cat /proc/mounts | grep debugfs`
+if [ "$DEBUGFS" == "" ]; then
+ echo "debugfs does not appear to be mounted!"
+ echo "Please mount debugfs and try again"
+ exit 1
+fi
+
+# Check that the fault injection directory exists
+DEBUGDIR=`echo $DEBUGFS | awk '{print $2}'`/nfsd
+if [ ! -d "$DEBUGDIR" ]; then
+ echo "$DEBUGDIR does not exist"
+ echo "Check that your .config selects CONFIG_NFSD_FAULT_INJECTION"
+ exit 1
+fi
+
+function help()
+{
+ echo "Usage $0 injection_type [count]"
+ echo ""
+ echo "Injection types are:"
+ ls $DEBUGDIR
+ exit 1
+}
+
+if [ $# == 0 ]; then
+ help
+elif [ ! -f $DEBUGDIR/$1 ]; then
+ help
+elif [ $# != 2 ]; then
+ COUNT=0
+else
+ COUNT=$2
+fi
+
+BEFORE=`mktemp`
+AFTER=`mktemp`
+dmesg > $BEFORE
+echo $COUNT > $DEBUGDIR/$1
+dmesg > $AFTER
+# Capture lines that only exist in the $AFTER file
+diff $BEFORE $AFTER | grep ">"
+rm -f $BEFORE $AFTER
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 7a527f7e9da9..ddc22525228d 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -21,6 +21,8 @@ EVENT MODIFIERS
Events can optionally have a modifer by appending a colon and one or
more modifiers. Modifiers allow the user to restrict when events are
counted with 'u' for user-space, 'k' for kernel, 'h' for hypervisor.
+Additional modifiers are 'G' for guest counting (in KVM guests) and 'H'
+for host counting (not in KVM guests).
The 'p' modifier can be used for specifying how precise the instruction
address should be. The 'p' modifier is currently only implemented for
diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST
index c12659d8cb26..1078c5fadd5b 100644
--- a/tools/perf/MANIFEST
+++ b/tools/perf/MANIFEST
@@ -1,4 +1,5 @@
tools/perf
+include/linux/const.h
include/linux/perf_event.h
include/linux/rbtree.h
include/linux/list.h
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 214ba7f9f577..806e0a286634 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -235,7 +235,7 @@ out_delete:
}
static const char * const annotate_usage[] = {
- "perf annotate [<options>] <command>",
+ "perf annotate [<options>]",
NULL
};
@@ -313,10 +313,5 @@ int cmd_annotate(int argc, const char **argv, const char *prefix __used)
annotate.sym_hist_filter = argv[0];
}
- if (field_sep && *field_sep == '.') {
- pr_err("'.' is the only non valid --field-separator argument\n");
- return -1;
- }
-
return __cmd_annotate(&annotate);
}
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index fe1ad8f21961..39104c0beea3 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -108,7 +108,9 @@ static void setup_cpunode_map(void)
continue;
cpunode_map[cpu] = mem;
}
+ closedir(dir2);
}
+ closedir(dir1);
}
static void insert_alloc_stat(unsigned long call_site, unsigned long ptr,
@@ -645,6 +647,7 @@ static int setup_sorting(struct list_head *sort_list, const char *arg)
break;
if (sort_dimension__add(tok, sort_list) < 0) {
error("Unknown --sort key: '%s'", tok);
+ free(str);
return -1;
}
}
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 032324a76b87..9fc6e0fa3dce 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -22,9 +22,6 @@
static const char *file_name;
static char name_buffer[256];
-bool perf_host = 1;
-bool perf_guest;
-
static const char * const kvm_usage[] = {
"perf kvm [<options>] {top|record|report|diff|buildid-list}",
NULL
@@ -107,7 +104,8 @@ static int __cmd_buildid_list(int argc, const char **argv)
int cmd_kvm(int argc, const char **argv, const char *prefix __used)
{
- perf_host = perf_guest = 0;
+ perf_host = 0;
+ perf_guest = 1;
argc = parse_options(argc, argv, kvm_options, kvm_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index fd1909afcfd6..bb68ddf257b7 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -1018,13 +1018,17 @@ static char *get_script_path(const char *script_root, const char *suffix)
__script_root = get_script_root(&script_dirent, suffix);
if (__script_root && !strcmp(script_root, __script_root)) {
free(__script_root);
+ closedir(lang_dir);
+ closedir(scripts_dir);
snprintf(script_path, MAXPATHLEN, "%s/%s",
lang_path, script_dirent.d_name);
return strdup(script_path);
}
free(__script_root);
}
+ closedir(lang_dir);
}
+ closedir(scripts_dir);
return NULL;
}
diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c
index 2b9a7f497a20..3854e869dce1 100644
--- a/tools/perf/builtin-test.c
+++ b/tools/perf/builtin-test.c
@@ -1396,7 +1396,7 @@ int cmd_test(int argc, const char **argv, const char *prefix __used)
NULL,
};
const struct option test_options[] = {
- OPT_INTEGER('v', "verbose", &verbose,
+ OPT_INCR('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
OPT_END()
};
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 4f81eeb99875..8f80df896038 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -235,7 +235,6 @@ static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
if (he == NULL)
return NULL;
- evsel->hists.stats.total_period += sample->period;
hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
return he;
}
@@ -889,6 +888,10 @@ try_again:
ui__warning("The %s event is not supported.\n",
event_name(counter));
goto out_err;
+ } else if (err == EMFILE) {
+ ui__warning("Too many events are opened.\n"
+ "Try again after reducing the number of events\n");
+ goto out_err;
}
ui__warning("The sys_perf_event_open() syscall "
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index fa1837088ca8..3f16e08a5c8d 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -111,8 +111,11 @@ int perf_evlist__add_default(struct perf_evlist *evlist)
.type = PERF_TYPE_HARDWARE,
.config = PERF_COUNT_HW_CPU_CYCLES,
};
- struct perf_evsel *evsel = perf_evsel__new(&attr, 0);
+ struct perf_evsel *evsel;
+
+ event_attr_init(&attr);
+ evsel = perf_evsel__new(&attr, 0);
if (evsel == NULL)
goto error;
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index abef2703cd24..6f505d1abac7 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -76,21 +76,21 @@ static void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
}
}
-static void hist_entry__add_cpumode_period(struct hist_entry *self,
+static void hist_entry__add_cpumode_period(struct hist_entry *he,
unsigned int cpumode, u64 period)
{
switch (cpumode) {
case PERF_RECORD_MISC_KERNEL:
- self->period_sys += period;
+ he->period_sys += period;
break;
case PERF_RECORD_MISC_USER:
- self->period_us += period;
+ he->period_us += period;
break;
case PERF_RECORD_MISC_GUEST_KERNEL:
- self->period_guest_sys += period;
+ he->period_guest_sys += period;
break;
case PERF_RECORD_MISC_GUEST_USER:
- self->period_guest_us += period;
+ he->period_guest_us += period;
break;
default:
break;
@@ -165,18 +165,18 @@ void hists__decay_entries_threaded(struct hists *hists,
static struct hist_entry *hist_entry__new(struct hist_entry *template)
{
size_t callchain_size = symbol_conf.use_callchain ? sizeof(struct callchain_root) : 0;
- struct hist_entry *self = malloc(sizeof(*self) + callchain_size);
+ struct hist_entry *he = malloc(sizeof(*he) + callchain_size);
- if (self != NULL) {
- *self = *template;
- self->nr_events = 1;
- if (self->ms.map)
- self->ms.map->referenced = true;
+ if (he != NULL) {
+ *he = *template;
+ he->nr_events = 1;
+ if (he->ms.map)
+ he->ms.map->referenced = true;
if (symbol_conf.use_callchain)
- callchain_init(self->callchain);
+ callchain_init(he->callchain);
}
- return self;
+ return he;
}
static void hists__inc_nr_entries(struct hists *hists, struct hist_entry *h)
@@ -677,15 +677,16 @@ static size_t callchain__fprintf_flat(FILE *fp, struct callchain_node *self,
return ret;
}
-static size_t hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
- u64 total_samples, int left_margin)
+static size_t hist_entry_callchain__fprintf(struct hist_entry *he,
+ u64 total_samples, int left_margin,
+ FILE *fp)
{
struct rb_node *rb_node;
struct callchain_node *chain;
size_t ret = 0;
u32 entries_printed = 0;
- rb_node = rb_first(&self->sorted_chain);
+ rb_node = rb_first(&he->sorted_chain);
while (rb_node) {
double percent;
@@ -730,35 +731,35 @@ void hists__output_recalc_col_len(struct hists *hists, int max_rows)
}
}
-static int hist_entry__pcnt_snprintf(struct hist_entry *self, char *s,
+static int hist_entry__pcnt_snprintf(struct hist_entry *he, char *s,
size_t size, struct hists *pair_hists,
bool show_displacement, long displacement,
- bool color, u64 session_total)
+ bool color, u64 total_period)
{
u64 period, total, period_sys, period_us, period_guest_sys, period_guest_us;
u64 nr_events;
const char *sep = symbol_conf.field_sep;
int ret;
- if (symbol_conf.exclude_other && !self->parent)
+ if (symbol_conf.exclude_other && !he->parent)
return 0;
if (pair_hists) {
- period = self->pair ? self->pair->period : 0;
- nr_events = self->pair ? self->pair->nr_events : 0;
+ period = he->pair ? he->pair->period : 0;
+ nr_events = he->pair ? he->pair->nr_events : 0;
total = pair_hists->stats.total_period;
- period_sys = self->pair ? self->pair->period_sys : 0;
- period_us = self->pair ? self->pair->period_us : 0;
- period_guest_sys = self->pair ? self->pair->period_guest_sys : 0;
- period_guest_us = self->pair ? self->pair->period_guest_us : 0;
+ period_sys = he->pair ? he->pair->period_sys : 0;
+ period_us = he->pair ? he->pair->period_us : 0;
+ period_guest_sys = he->pair ? he->pair->period_guest_sys : 0;
+ period_guest_us = he->pair ? he->pair->period_guest_us : 0;
} else {
- period = self->period;
- nr_events = self->nr_events;
- total = session_total;
- period_sys = self->period_sys;
- period_us = self->period_us;
- period_guest_sys = self->period_guest_sys;
- period_guest_us = self->period_guest_us;
+ period = he->period;
+ nr_events = he->nr_events;
+ total = total_period;
+ period_sys = he->period_sys;
+ period_us = he->period_us;
+ period_guest_sys = he->period_guest_sys;
+ period_guest_us = he->period_guest_us;
}
if (total) {
@@ -812,8 +813,8 @@ static int hist_entry__pcnt_snprintf(struct hist_entry *self, char *s,
if (total > 0)
old_percent = (period * 100.0) / total;
- if (session_total > 0)
- new_percent = (self->period * 100.0) / session_total;
+ if (total_period > 0)
+ new_percent = (he->period * 100.0) / total_period;
diff = new_percent - old_percent;
@@ -862,9 +863,10 @@ int hist_entry__snprintf(struct hist_entry *he, char *s, size_t size,
return ret;
}
-int hist_entry__fprintf(struct hist_entry *he, size_t size, struct hists *hists,
- struct hists *pair_hists, bool show_displacement,
- long displacement, FILE *fp, u64 session_total)
+static int hist_entry__fprintf(struct hist_entry *he, size_t size,
+ struct hists *hists, struct hists *pair_hists,
+ bool show_displacement, long displacement,
+ u64 total_period, FILE *fp)
{
char bf[512];
int ret;
@@ -874,14 +876,14 @@ int hist_entry__fprintf(struct hist_entry *he, size_t size, struct hists *hists,
ret = hist_entry__pcnt_snprintf(he, bf, size, pair_hists,
show_displacement, displacement,
- true, session_total);
+ true, total_period);
hist_entry__snprintf(he, bf + ret, size - ret, hists);
return fprintf(fp, "%s\n", bf);
}
-static size_t hist_entry__fprintf_callchain(struct hist_entry *self,
- struct hists *hists, FILE *fp,
- u64 session_total)
+static size_t hist_entry__fprintf_callchain(struct hist_entry *he,
+ struct hists *hists,
+ u64 total_period, FILE *fp)
{
int left_margin = 0;
@@ -889,11 +891,10 @@ static size_t hist_entry__fprintf_callchain(struct hist_entry *self,
struct sort_entry *se = list_first_entry(&hist_entry__sort_list,
typeof(*se), list);
left_margin = hists__col_len(hists, se->se_width_idx);
- left_margin -= thread__comm_len(self->thread);
+ left_margin -= thread__comm_len(he->thread);
}
- return hist_entry_callchain__fprintf(fp, self, session_total,
- left_margin);
+ return hist_entry_callchain__fprintf(he, total_period, left_margin, fp);
}
size_t hists__fprintf(struct hists *hists, struct hists *pair,
@@ -903,6 +904,7 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair,
struct sort_entry *se;
struct rb_node *nd;
size_t ret = 0;
+ u64 total_period;
unsigned long position = 1;
long displacement = 0;
unsigned int width;
@@ -917,20 +919,6 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair,
fprintf(fp, "# %s", pair ? "Baseline" : "Overhead");
- if (symbol_conf.show_nr_samples) {
- if (sep)
- fprintf(fp, "%cSamples", *sep);
- else
- fputs(" Samples ", fp);
- }
-
- if (symbol_conf.show_total_period) {
- if (sep)
- ret += fprintf(fp, "%cPeriod", *sep);
- else
- ret += fprintf(fp, " Period ");
- }
-
if (symbol_conf.show_cpu_utilization) {
if (sep) {
ret += fprintf(fp, "%csys", *sep);
@@ -940,8 +928,8 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair,
ret += fprintf(fp, "%cguest us", *sep);
}
} else {
- ret += fprintf(fp, " sys ");
- ret += fprintf(fp, " us ");
+ ret += fprintf(fp, " sys ");
+ ret += fprintf(fp, " us ");
if (perf_guest) {
ret += fprintf(fp, " guest sys ");
ret += fprintf(fp, " guest us ");
@@ -949,6 +937,20 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair,
}
}
+ if (symbol_conf.show_nr_samples) {
+ if (sep)
+ fprintf(fp, "%cSamples", *sep);
+ else
+ fputs(" Samples ", fp);
+ }
+
+ if (symbol_conf.show_total_period) {
+ if (sep)
+ ret += fprintf(fp, "%cPeriod", *sep);
+ else
+ ret += fprintf(fp, " Period ");
+ }
+
if (pair) {
if (sep)
ret += fprintf(fp, "%cDelta", *sep);
@@ -993,6 +995,8 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair,
goto print_entries;
fprintf(fp, "# ........");
+ if (symbol_conf.show_cpu_utilization)
+ fprintf(fp, " ....... .......");
if (symbol_conf.show_nr_samples)
fprintf(fp, " ..........");
if (symbol_conf.show_total_period)
@@ -1025,6 +1029,8 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair,
goto out;
print_entries:
+ total_period = hists->stats.total_period;
+
for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
@@ -1040,11 +1046,10 @@ print_entries:
++position;
}
ret += hist_entry__fprintf(h, max_cols, hists, pair, show_displacement,
- displacement, fp, hists->stats.total_period);
+ displacement, total_period, fp);
if (symbol_conf.use_callchain)
- ret += hist_entry__fprintf_callchain(h, hists, fp,
- hists->stats.total_period);
+ ret += hist_entry__fprintf_callchain(h, hists, total_period, fp);
if (max_rows && ++nr_rows >= max_rows)
goto out;
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index ff6f9d56ea41..f55f0a8d1f81 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -66,11 +66,8 @@ struct hists {
struct hist_entry *__hists__add_entry(struct hists *self,
struct addr_location *al,
struct symbol *parent, u64 period);
-extern int64_t hist_entry__cmp(struct hist_entry *, struct hist_entry *);
-extern int64_t hist_entry__collapse(struct hist_entry *, struct hist_entry *);
-int hist_entry__fprintf(struct hist_entry *he, size_t size, struct hists *hists,
- struct hists *pair_hists, bool show_displacement,
- long displacement, FILE *fp, u64 session_total);
+int64_t hist_entry__cmp(struct hist_entry *left, struct hist_entry *right);
+int64_t hist_entry__collapse(struct hist_entry *left, struct hist_entry *right);
int hist_entry__snprintf(struct hist_entry *self, char *bf, size_t size,
struct hists *hists);
void hist_entry__free(struct hist_entry *);
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 531c283fc0c5..b029296d20d9 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -735,8 +735,8 @@ static int
parse_event_modifier(const char **strp, struct perf_event_attr *attr)
{
const char *str = *strp;
- int exclude = 0;
- int eu = 0, ek = 0, eh = 0, precise = 0;
+ int exclude = 0, exclude_GH = 0;
+ int eu = 0, ek = 0, eh = 0, eH = 0, eG = 0, precise = 0;
if (!*str)
return 0;
@@ -760,6 +760,14 @@ parse_event_modifier(const char **strp, struct perf_event_attr *attr)
if (!exclude)
exclude = eu = ek = eh = 1;
eh = 0;
+ } else if (*str == 'G') {
+ if (!exclude_GH)
+ exclude_GH = eG = eH = 1;
+ eG = 0;
+ } else if (*str == 'H') {
+ if (!exclude_GH)
+ exclude_GH = eG = eH = 1;
+ eH = 0;
} else if (*str == 'p') {
precise++;
} else
@@ -776,6 +784,8 @@ parse_event_modifier(const char **strp, struct perf_event_attr *attr)
attr->exclude_kernel = ek;
attr->exclude_hv = eh;
attr->precise_ip = precise;
+ attr->exclude_host = eH;
+ attr->exclude_guest = eG;
return 0;
}
@@ -838,6 +848,7 @@ int parse_events(struct perf_evlist *evlist , const char *str, int unset __used)
for (;;) {
ostr = str;
memset(&attr, 0, sizeof(attr));
+ event_attr_init(&attr);
ret = parse_event_symbols(evlist, &str, &attr);
if (ret == EVT_FAILED)
return -1;
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index ac6830d8292b..fc22cf5c605f 100644
--- a/tools/perf/util/trace-event-info.c
+++ b/tools/perf/util/trace-event-info.c
@@ -18,7 +18,6 @@
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
-#include <ctype.h>
#include "util.h"
#include <dirent.h>
#include <mntent.h>
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 5b3ea49aa63e..813141047fc2 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -1,6 +1,21 @@
+#include "../perf.h"
#include "util.h"
#include <sys/mman.h>
+/*
+ * XXX We need to find a better place for these things...
+ */
+bool perf_host = true;
+bool perf_guest = true;
+
+void event_attr_init(struct perf_event_attr *attr)
+{
+ if (!perf_host)
+ attr->exclude_host = 1;
+ if (!perf_guest)
+ attr->exclude_guest = 1;
+}
+
int mkdir_p(char *path, mode_t mode)
{
struct stat st;
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 37be34dff798..b9c530cce79a 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -242,6 +242,10 @@ int strtailcmp(const char *s1, const char *s2);
unsigned long convert_unit(unsigned long value, char *unit);
int readn(int fd, void *buf, size_t size);
+struct perf_event_attr;
+
+void event_attr_init(struct perf_event_attr *attr);
+
#define _STR(x) #x
#define STR(x) _STR(x)
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
new file mode 100644
index 000000000000..4ec84018cc13
--- /dev/null
+++ b/tools/testing/selftests/Makefile
@@ -0,0 +1,11 @@
+TARGETS = breakpoints
+
+all:
+ for TARGET in $(TARGETS); do \
+ make -C $$TARGET; \
+ done;
+
+clean:
+ for TARGET in $(TARGETS); do \
+ make -C $$TARGET clean; \
+ done;
diff --git a/tools/testing/selftests/breakpoints/Makefile b/tools/testing/selftests/breakpoints/Makefile
new file mode 100644
index 000000000000..f362722cdce7
--- /dev/null
+++ b/tools/testing/selftests/breakpoints/Makefile
@@ -0,0 +1,20 @@
+# Taken from perf makefile
+uname_M := $(shell uname -m 2>/dev/null || echo not)
+ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/i386/)
+ifeq ($(ARCH),i386)
+ ARCH := x86
+endif
+ifeq ($(ARCH),x86_64)
+ ARCH := x86
+endif
+
+
+all:
+ifeq ($(ARCH),x86)
+ gcc breakpoint_test.c -o run_test
+else
+ echo "Not an x86 target, can't build breakpoints selftests"
+endif
+
+clean:
+ rm -fr run_test
diff --git a/tools/testing/selftests/breakpoints/breakpoint_test.c b/tools/testing/selftests/breakpoints/breakpoint_test.c
new file mode 100644
index 000000000000..a0743f3b2b57
--- /dev/null
+++ b/tools/testing/selftests/breakpoints/breakpoint_test.c
@@ -0,0 +1,394 @@
+/*
+ * Copyright (C) 2011 Red Hat, Inc., Frederic Weisbecker <fweisbec@redhat.com>
+ *
+ * Licensed under the terms of the GNU GPL License version 2
+ *
+ * Selftests for breakpoints (and more generally the do_debug() path) in x86.
+ */
+
+
+#include <sys/ptrace.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/user.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+
+/* Breakpoint access modes */
+enum {
+ BP_X = 1,
+ BP_RW = 2,
+ BP_W = 4,
+};
+
+static pid_t child_pid;
+
+/*
+ * Ensures the child and parent are always "talking" about
+ * the same test sequence. (ie: that we haven't forgotten
+ * to call check_trapped() somewhere).
+ */
+static int nr_tests;
+
+static void set_breakpoint_addr(void *addr, int n)
+{
+ int ret;
+
+ ret = ptrace(PTRACE_POKEUSER, child_pid,
+ offsetof(struct user, u_debugreg[n]), addr);
+ if (ret) {
+ perror("Can't set breakpoint addr\n");
+ exit(-1);
+ }
+}
+
+static void toggle_breakpoint(int n, int type, int len,
+ int local, int global, int set)
+{
+ int ret;
+
+ int xtype, xlen;
+ unsigned long vdr7, dr7;
+
+ switch (type) {
+ case BP_X:
+ xtype = 0;
+ break;
+ case BP_W:
+ xtype = 1;
+ break;
+ case BP_RW:
+ xtype = 3;
+ break;
+ }
+
+ switch (len) {
+ case 1:
+ xlen = 0;
+ break;
+ case 2:
+ xlen = 4;
+ break;
+ case 4:
+ xlen = 0xc;
+ break;
+ case 8:
+ xlen = 8;
+ break;
+ }
+
+ dr7 = ptrace(PTRACE_PEEKUSER, child_pid,
+ offsetof(struct user, u_debugreg[7]), 0);
+
+ vdr7 = (xlen | xtype) << 16;
+ vdr7 <<= 4 * n;
+
+ if (local) {
+ vdr7 |= 1 << (2 * n);
+ vdr7 |= 1 << 8;
+ }
+ if (global) {
+ vdr7 |= 2 << (2 * n);
+ vdr7 |= 1 << 9;
+ }
+
+ if (set)
+ dr7 |= vdr7;
+ else
+ dr7 &= ~vdr7;
+
+ ret = ptrace(PTRACE_POKEUSER, child_pid,
+ offsetof(struct user, u_debugreg[7]), dr7);
+ if (ret) {
+ perror("Can't set dr7");
+ exit(-1);
+ }
+}
+
+/* Dummy variables to test read/write accesses */
+static unsigned long long dummy_var[4];
+
+/* Dummy functions to test execution accesses */
+static void dummy_func(void) { }
+static void dummy_func1(void) { }
+static void dummy_func2(void) { }
+static void dummy_func3(void) { }
+
+static void (*dummy_funcs[])(void) = {
+ dummy_func,
+ dummy_func1,
+ dummy_func2,
+ dummy_func3,
+};
+
+static int trapped;
+
+static void check_trapped(void)
+{
+ /*
+ * If we haven't trapped, wake up the parent
+ * so that it notices the failure.
+ */
+ if (!trapped)
+ kill(getpid(), SIGUSR1);
+ trapped = 0;
+
+ nr_tests++;
+}
+
+static void write_var(int len)
+{
+ char *pcval; short *psval; int *pival; long long *plval;
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ switch (len) {
+ case 1:
+ pcval = (char *)&dummy_var[i];
+ *pcval = 0xff;
+ break;
+ case 2:
+ psval = (short *)&dummy_var[i];
+ *psval = 0xffff;
+ break;
+ case 4:
+ pival = (int *)&dummy_var[i];
+ *pival = 0xffffffff;
+ break;
+ case 8:
+ plval = (long long *)&dummy_var[i];
+ *plval = 0xffffffffffffffffLL;
+ break;
+ }
+ check_trapped();
+ }
+}
+
+static void read_var(int len)
+{
+ char cval; short sval; int ival; long long lval;
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ switch (len) {
+ case 1:
+ cval = *(char *)&dummy_var[i];
+ break;
+ case 2:
+ sval = *(short *)&dummy_var[i];
+ break;
+ case 4:
+ ival = *(int *)&dummy_var[i];
+ break;
+ case 8:
+ lval = *(long long *)&dummy_var[i];
+ break;
+ }
+ check_trapped();
+ }
+}
+
+/*
+ * Do the r/w/x accesses to trigger the breakpoints. And run
+ * the usual traps.
+ */
+static void trigger_tests(void)
+{
+ int len, local, global, i;
+ char val;
+ int ret;
+
+ ret = ptrace(PTRACE_TRACEME, 0, NULL, 0);
+ if (ret) {
+ perror("Can't be traced?\n");
+ return;
+ }
+
+ /* Wake up father so that it sets up the first test */
+ kill(getpid(), SIGUSR1);
+
+ /* Test instruction breakpoints */
+ for (local = 0; local < 2; local++) {
+ for (global = 0; global < 2; global++) {
+ if (!local && !global)
+ continue;
+
+ for (i = 0; i < 4; i++) {
+ dummy_funcs[i]();
+ check_trapped();
+ }
+ }
+ }
+
+ /* Test write watchpoints */
+ for (len = 1; len <= sizeof(long); len <<= 1) {
+ for (local = 0; local < 2; local++) {
+ for (global = 0; global < 2; global++) {
+ if (!local && !global)
+ continue;
+ write_var(len);
+ }
+ }
+ }
+
+ /* Test read/write watchpoints (on read accesses) */
+ for (len = 1; len <= sizeof(long); len <<= 1) {
+ for (local = 0; local < 2; local++) {
+ for (global = 0; global < 2; global++) {
+ if (!local && !global)
+ continue;
+ read_var(len);
+ }
+ }
+ }
+
+ /* Icebp trap */
+ asm(".byte 0xf1\n");
+ check_trapped();
+
+ /* Int 3 trap */
+ asm("int $3\n");
+ check_trapped();
+
+ kill(getpid(), SIGUSR1);
+}
+
+static void check_success(const char *msg)
+{
+ const char *msg2;
+ int child_nr_tests;
+ int status;
+
+ /* Wait for the child to SIGTRAP */
+ wait(&status);
+
+ msg2 = "Failed";
+
+ if (WSTOPSIG(status) == SIGTRAP) {
+ child_nr_tests = ptrace(PTRACE_PEEKDATA, child_pid,
+ &nr_tests, 0);
+ if (child_nr_tests == nr_tests)
+ msg2 = "Ok";
+ if (ptrace(PTRACE_POKEDATA, child_pid, &trapped, 1)) {
+ perror("Can't poke\n");
+ exit(-1);
+ }
+ }
+
+ nr_tests++;
+
+ printf("%s [%s]\n", msg, msg2);
+}
+
+static void launch_instruction_breakpoints(char *buf, int local, int global)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ set_breakpoint_addr(dummy_funcs[i], i);
+ toggle_breakpoint(i, BP_X, 1, local, global, 1);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ sprintf(buf, "Test breakpoint %d with local: %d global: %d",
+ i, local, global);
+ check_success(buf);
+ toggle_breakpoint(i, BP_X, 1, local, global, 0);
+ }
+}
+
+static void launch_watchpoints(char *buf, int mode, int len,
+ int local, int global)
+{
+ const char *mode_str;
+ int i;
+
+ if (mode == BP_W)
+ mode_str = "write";
+ else
+ mode_str = "read";
+
+ for (i = 0; i < 4; i++) {
+ set_breakpoint_addr(&dummy_var[i], i);
+ toggle_breakpoint(i, mode, len, local, global, 1);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ sprintf(buf, "Test %s watchpoint %d with len: %d local: "
+ "%d global: %d", mode_str, i, len, local, global);
+ check_success(buf);
+ toggle_breakpoint(i, mode, len, local, global, 0);
+ }
+}
+
+/* Set the breakpoints and check the child successfully trigger them */
+static void launch_tests(void)
+{
+ char buf[1024];
+ int len, local, global, i;
+
+ /* Instruction breakpoints */
+ for (local = 0; local < 2; local++) {
+ for (global = 0; global < 2; global++) {
+ if (!local && !global)
+ continue;
+ launch_instruction_breakpoints(buf, local, global);
+ }
+ }
+
+ /* Write watchpoint */
+ for (len = 1; len <= sizeof(long); len <<= 1) {
+ for (local = 0; local < 2; local++) {
+ for (global = 0; global < 2; global++) {
+ if (!local && !global)
+ continue;
+ launch_watchpoints(buf, BP_W, len,
+ local, global);
+ }
+ }
+ }
+
+ /* Read-Write watchpoint */
+ for (len = 1; len <= sizeof(long); len <<= 1) {
+ for (local = 0; local < 2; local++) {
+ for (global = 0; global < 2; global++) {
+ if (!local && !global)
+ continue;
+ launch_watchpoints(buf, BP_RW, len,
+ local, global);
+ }
+ }
+ }
+
+ /* Icebp traps */
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success("Test icebp");
+
+ /* Int 3 traps */
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success("Test int 3 trap");
+
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+}
+
+int main(int argc, char **argv)
+{
+ pid_t pid;
+ int ret;
+
+ pid = fork();
+ if (!pid) {
+ trigger_tests();
+ return 0;
+ }
+
+ child_pid = pid;
+
+ wait(NULL);
+
+ launch_tests();
+
+ wait(NULL);
+
+ return 0;
+}
diff --git a/tools/testing/selftests/run_tests b/tools/testing/selftests/run_tests
new file mode 100644
index 000000000000..320718a4e6bf
--- /dev/null
+++ b/tools/testing/selftests/run_tests
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+TARGETS=breakpoints
+
+for TARGET in $TARGETS
+do
+ $TARGET/run_test
+done
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.