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-rw-r--r--tools/perf/Makefile.perf8
-rw-r--r--tools/perf/arch/x86/Makefile1
-rw-r--r--tools/perf/arch/x86/include/perf_regs.h4
-rw-r--r--tools/perf/arch/x86/tests/dwarf-unwind.c58
-rw-r--r--tools/perf/tests/builtin-test.c8
-rw-r--r--tools/perf/tests/dwarf-unwind.c144
-rw-r--r--tools/perf/tests/tests.h9
7 files changed, 232 insertions, 0 deletions
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 7257e7e9e38a..10fcf331e0e3 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -408,6 +408,11 @@ endif
LIB_OBJS += $(OUTPUT)tests/code-reading.o
LIB_OBJS += $(OUTPUT)tests/sample-parsing.o
LIB_OBJS += $(OUTPUT)tests/parse-no-sample-id-all.o
+ifndef NO_LIBUNWIND
+ifeq ($(ARCH),x86)
+LIB_OBJS += $(OUTPUT)tests/dwarf-unwind.o
+endif
+endif
BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
BUILTIN_OBJS += $(OUTPUT)builtin-bench.o
@@ -655,6 +660,9 @@ $(OUTPUT)tests/python-use.o: tests/python-use.c $(OUTPUT)PERF-CFLAGS
-DPYTHON='"$(PYTHON_WORD)"' \
$<
+$(OUTPUT)tests/dwarf-unwind.o: tests/dwarf-unwind.c
+ $(QUIET_CC)$(CC) -o $@ -c $(CFLAGS) -fno-optimize-sibling-calls $<
+
$(OUTPUT)util/config.o: util/config.c $(OUTPUT)PERF-CFLAGS
$(QUIET_CC)$(CC) -o $@ -c $(CFLAGS) -DETC_PERFCONFIG='"$(ETC_PERFCONFIG_SQ)"' $<
diff --git a/tools/perf/arch/x86/Makefile b/tools/perf/arch/x86/Makefile
index 1cbef7338f84..948ea6cfd681 100644
--- a/tools/perf/arch/x86/Makefile
+++ b/tools/perf/arch/x86/Makefile
@@ -5,6 +5,7 @@ endif
ifndef NO_LIBUNWIND
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind.o
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/tests/regs_load.o
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/tests/dwarf-unwind.o
endif
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/header.o
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/tsc.o
diff --git a/tools/perf/arch/x86/include/perf_regs.h b/tools/perf/arch/x86/include/perf_regs.h
index f3435d62aec1..fc819ca34a7e 100644
--- a/tools/perf/arch/x86/include/perf_regs.h
+++ b/tools/perf/arch/x86/include/perf_regs.h
@@ -9,12 +9,16 @@ void perf_regs_load(u64 *regs);
#ifndef HAVE_ARCH_X86_64_SUPPORT
#define PERF_REGS_MASK ((1ULL << PERF_REG_X86_32_MAX) - 1)
+#define PERF_REGS_MAX PERF_REG_X86_32_MAX
+#define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_32
#else
#define REG_NOSUPPORT ((1ULL << PERF_REG_X86_DS) | \
(1ULL << PERF_REG_X86_ES) | \
(1ULL << PERF_REG_X86_FS) | \
(1ULL << PERF_REG_X86_GS))
#define PERF_REGS_MASK (((1ULL << PERF_REG_X86_64_MAX) - 1) & ~REG_NOSUPPORT)
+#define PERF_REGS_MAX PERF_REG_X86_64_MAX
+#define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_64
#endif
#define PERF_REG_IP PERF_REG_X86_IP
#define PERF_REG_SP PERF_REG_X86_SP
diff --git a/tools/perf/arch/x86/tests/dwarf-unwind.c b/tools/perf/arch/x86/tests/dwarf-unwind.c
new file mode 100644
index 000000000000..371f8493dcfd
--- /dev/null
+++ b/tools/perf/arch/x86/tests/dwarf-unwind.c
@@ -0,0 +1,58 @@
+#include <string.h>
+#include "perf_regs.h"
+#include "thread.h"
+#include "map.h"
+#include "event.h"
+#include "tests/tests.h"
+
+#define STACK_SIZE 8192
+
+static int sample_ustack(struct perf_sample *sample,
+ struct thread *thread, u64 *regs)
+{
+ struct stack_dump *stack = &sample->user_stack;
+ struct map *map;
+ unsigned long sp;
+ u64 stack_size, *buf;
+
+ buf = malloc(STACK_SIZE);
+ if (!buf) {
+ pr_debug("failed to allocate sample uregs data\n");
+ return -1;
+ }
+
+ sp = (unsigned long) regs[PERF_REG_X86_SP];
+
+ map = map_groups__find(&thread->mg, MAP__FUNCTION, (u64) sp);
+ if (!map) {
+ pr_debug("failed to get stack map\n");
+ return -1;
+ }
+
+ stack_size = map->end - sp;
+ stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
+
+ memcpy(buf, (void *) sp, stack_size);
+ stack->data = (char *) buf;
+ stack->size = stack_size;
+ return 0;
+}
+
+int test__arch_unwind_sample(struct perf_sample *sample,
+ struct thread *thread)
+{
+ struct regs_dump *regs = &sample->user_regs;
+ u64 *buf;
+
+ buf = malloc(sizeof(u64) * PERF_REGS_MAX);
+ if (!buf) {
+ pr_debug("failed to allocate sample uregs data\n");
+ return -1;
+ }
+
+ perf_regs_load(buf);
+ regs->abi = PERF_SAMPLE_REGS_ABI;
+ regs->regs = buf;
+
+ return sample_ustack(sample, thread, buf);
+}
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 1e67437fb4ca..f5a6ffba8a47 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -115,6 +115,14 @@ static struct test {
.desc = "Test parsing with no sample_id_all bit set",
.func = test__parse_no_sample_id_all,
},
+#if defined(__x86_64__) || defined(__i386__)
+#ifdef HAVE_LIBUNWIND_SUPPORT
+ {
+ .desc = "Test dwarf unwind",
+ .func = test__dwarf_unwind,
+ },
+#endif
+#endif
{
.func = NULL,
},
diff --git a/tools/perf/tests/dwarf-unwind.c b/tools/perf/tests/dwarf-unwind.c
new file mode 100644
index 000000000000..a203c0caaf8a
--- /dev/null
+++ b/tools/perf/tests/dwarf-unwind.c
@@ -0,0 +1,144 @@
+#include <linux/compiler.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "tests.h"
+#include "debug.h"
+#include "machine.h"
+#include "event.h"
+#include "unwind.h"
+#include "perf_regs.h"
+#include "map.h"
+#include "thread.h"
+
+static int mmap_handler(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct perf_sample *sample __maybe_unused,
+ struct machine *machine)
+{
+ return machine__process_mmap_event(machine, event, NULL);
+}
+
+static int init_live_machine(struct machine *machine)
+{
+ union perf_event event;
+ pid_t pid = getpid();
+
+ return perf_event__synthesize_mmap_events(NULL, &event, pid, pid,
+ mmap_handler, machine, true);
+}
+
+#define MAX_STACK 6
+
+static int unwind_entry(struct unwind_entry *entry, void *arg)
+{
+ unsigned long *cnt = (unsigned long *) arg;
+ char *symbol = entry->sym ? entry->sym->name : NULL;
+ static const char *funcs[MAX_STACK] = {
+ "test__arch_unwind_sample",
+ "unwind_thread",
+ "krava_3",
+ "krava_2",
+ "krava_1",
+ "test__dwarf_unwind"
+ };
+
+ if (*cnt >= MAX_STACK) {
+ pr_debug("failed: crossed the max stack value %d\n", MAX_STACK);
+ return -1;
+ }
+
+ if (!symbol) {
+ pr_debug("failed: got unresolved address 0x%" PRIx64 "\n",
+ entry->ip);
+ return -1;
+ }
+
+ pr_debug("got: %s 0x%" PRIx64 "\n", symbol, entry->ip);
+ return strcmp((const char *) symbol, funcs[(*cnt)++]);
+}
+
+__attribute__ ((noinline))
+static int unwind_thread(struct thread *thread, struct machine *machine)
+{
+ struct perf_sample sample;
+ unsigned long cnt = 0;
+ int err = -1;
+
+ memset(&sample, 0, sizeof(sample));
+
+ if (test__arch_unwind_sample(&sample, thread)) {
+ pr_debug("failed to get unwind sample\n");
+ goto out;
+ }
+
+ err = unwind__get_entries(unwind_entry, &cnt, machine, thread,
+ PERF_REGS_MASK, &sample, MAX_STACK);
+ if (err)
+ pr_debug("unwind failed\n");
+ else if (cnt != MAX_STACK) {
+ pr_debug("got wrong number of stack entries %lu != %d\n",
+ cnt, MAX_STACK);
+ err = -1;
+ }
+
+ out:
+ free(sample.user_stack.data);
+ free(sample.user_regs.regs);
+ return err;
+}
+
+__attribute__ ((noinline))
+static int krava_3(struct thread *thread, struct machine *machine)
+{
+ return unwind_thread(thread, machine);
+}
+
+__attribute__ ((noinline))
+static int krava_2(struct thread *thread, struct machine *machine)
+{
+ return krava_3(thread, machine);
+}
+
+__attribute__ ((noinline))
+static int krava_1(struct thread *thread, struct machine *machine)
+{
+ return krava_2(thread, machine);
+}
+
+int test__dwarf_unwind(void)
+{
+ struct machines machines;
+ struct machine *machine;
+ struct thread *thread;
+ int err = -1;
+
+ machines__init(&machines);
+
+ machine = machines__find(&machines, HOST_KERNEL_ID);
+ if (!machine) {
+ pr_err("Could not get machine\n");
+ return -1;
+ }
+
+ if (init_live_machine(machine)) {
+ pr_err("Could not init machine\n");
+ goto out;
+ }
+
+ if (verbose > 1)
+ machine__fprintf(machine, stderr);
+
+ thread = machine__find_thread(machine, getpid());
+ if (!thread) {
+ pr_err("Could not get thread\n");
+ goto out;
+ }
+
+ err = krava_1(thread, machine);
+
+ out:
+ machine__delete_threads(machine);
+ machine__exit(machine);
+ machines__exit(&machines);
+ return err;
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index e0ac713857ba..8979309876a7 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -40,5 +40,14 @@ int test__code_reading(void);
int test__sample_parsing(void);
int test__keep_tracking(void);
int test__parse_no_sample_id_all(void);
+int test__dwarf_unwind(void);
+#if defined(__x86_64__) || defined(__i386__)
+#ifdef HAVE_LIBUNWIND_SUPPORT
+struct thread;
+struct perf_sample;
+int test__arch_unwind_sample(struct perf_sample *sample,
+ struct thread *thread);
+#endif
+#endif
#endif /* TESTS_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 14:48:40 +0000