User stack dump feature is recently added for powerpc. But there was no
test case available to test it. This test works same as other on arch by
preparing stack frame on perf test thread and comparing each frame by
unwinding it.
$ ./perf test 50
50: Test dwarf unwind: Ok
User stack dump for powerpc: https://lkml.org/lkml/2016/4/28/482
Signed-off-by: Ravi Bangoria
---
tools/perf/arch/powerpc/Build| 1 +
tools/perf/arch/powerpc/include/arch-tests.h | 13
tools/perf/arch/powerpc/include/perf_regs.h | 2 +
tools/perf/arch/powerpc/tests/Build | 4 ++
tools/perf/arch/powerpc/tests/arch-tests.c | 15 +
tools/perf/arch/powerpc/tests/dwarf-unwind.c | 62 ++
tools/perf/arch/powerpc/tests/regs_load.S| 94
tools/perf/tests/Build | 2 +-
tools/perf/tests/dwarf-unwind.c | 2 +-
9 files changed, 193 insertions(+), 2 deletions(-)
create mode 100644 tools/perf/arch/powerpc/include/arch-tests.h
create mode 100644 tools/perf/arch/powerpc/tests/Build
create mode 100644 tools/perf/arch/powerpc/tests/arch-tests.c
create mode 100644 tools/perf/arch/powerpc/tests/dwarf-unwind.c
create mode 100644 tools/perf/arch/powerpc/tests/regs_load.S
diff --git a/tools/perf/arch/powerpc/Build b/tools/perf/arch/powerpc/Build
index 54afe4a..db52fa2 100644
--- a/tools/perf/arch/powerpc/Build
+++ b/tools/perf/arch/powerpc/Build
@@ -1 +1,2 @@
libperf-y += util/
+libperf-y += tests/
diff --git a/tools/perf/arch/powerpc/include/arch-tests.h
b/tools/perf/arch/powerpc/include/arch-tests.h
new file mode 100644
index 000..84d8ded
--- /dev/null
+++ b/tools/perf/arch/powerpc/include/arch-tests.h
@@ -0,0 +1,13 @@
+#ifndef ARCH_TESTS_H
+#define ARCH_TESTS_H
+
+#ifdef HAVE_DWARF_UNWIND_SUPPORT
+struct thread;
+struct perf_sample;
+int test__arch_unwind_sample(struct perf_sample *sample,
+struct thread *thread);
+#endif
+
+extern struct test arch_tests[];
+
+#endif
diff --git a/tools/perf/arch/powerpc/include/perf_regs.h
b/tools/perf/arch/powerpc/include/perf_regs.h
index 75de0e9..c12f4e8 100644
--- a/tools/perf/arch/powerpc/include/perf_regs.h
+++ b/tools/perf/arch/powerpc/include/perf_regs.h
@@ -5,6 +5,8 @@
#include
#include
+void perf_regs_load(u64 *regs);
+
#define PERF_REGS_MASK ((1ULL << PERF_REG_POWERPC_MAX) - 1)
#define PERF_REGS_MAX PERF_REG_POWERPC_MAX
#ifdef __powerpc64__
diff --git a/tools/perf/arch/powerpc/tests/Build
b/tools/perf/arch/powerpc/tests/Build
new file mode 100644
index 000..d827ef3
--- /dev/null
+++ b/tools/perf/arch/powerpc/tests/Build
@@ -0,0 +1,4 @@
+libperf-$(CONFIG_DWARF_UNWIND) += regs_load.o
+libperf-$(CONFIG_DWARF_UNWIND) += dwarf-unwind.o
+
+libperf-y += arch-tests.o
diff --git a/tools/perf/arch/powerpc/tests/arch-tests.c
b/tools/perf/arch/powerpc/tests/arch-tests.c
new file mode 100644
index 000..e24f462
--- /dev/null
+++ b/tools/perf/arch/powerpc/tests/arch-tests.c
@@ -0,0 +1,15 @@
+#include
+#include "tests/tests.h"
+#include "arch-tests.h"
+
+struct test arch_tests[] = {
+#ifdef HAVE_DWARF_UNWIND_SUPPORT
+ {
+ .desc = "Test dwarf unwind",
+ .func = test__dwarf_unwind,
+ },
+#endif
+ {
+ .func = NULL,
+ },
+};
diff --git a/tools/perf/arch/powerpc/tests/dwarf-unwind.c
b/tools/perf/arch/powerpc/tests/dwarf-unwind.c
new file mode 100644
index 000..0bac313
--- /dev/null
+++ b/tools/perf/arch/powerpc/tests/dwarf-unwind.c
@@ -0,0 +1,62 @@
+#include
+#include "perf_regs.h"
+#include "thread.h"
+#include "map.h"
+#include "event.h"
+#include "debug.h"
+#include "tests/tests.h"
+#include "arch-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_POWERPC_R1];
+
+ map = map_groups__find(thread->mg, MAP__VARIABLE, (u64) sp);
+ if (!map) {
+ pr_debug("failed to get stack map\n");
+ free(buf);
+ 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 = calloc(1, sizeof(u64) * PERF_REGS_MAX);
+ if (!buf) {
+ pr_debug("failed to allocate sample uregs d
