diff options
| -rw-r--r-- | tools/perf/tests/.gitignore | 1 | ||||
| -rw-r--r-- | tools/perf/tests/Build | 9 | ||||
| -rw-r--r-- | tools/perf/tests/bpf-script-test-prologue.c | 35 | ||||
| -rw-r--r-- | tools/perf/tests/bpf.c | 34 | ||||
| -rw-r--r-- | tools/perf/tests/llvm.c | 4 | ||||
| -rw-r--r-- | tools/perf/tests/llvm.h | 2 |
6 files changed, 84 insertions, 1 deletions
diff --git a/tools/perf/tests/.gitignore b/tools/perf/tests/.gitignore index 489fc9ffbcb0..bf016c439fbd 100644 --- a/tools/perf/tests/.gitignore +++ b/tools/perf/tests/.gitignore @@ -1,2 +1,3 @@ llvm-src-base.c llvm-src-kbuild.c +llvm-src-prologue.c diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build index f41ebf8849fe..0ff8a973b81c 100644 --- a/tools/perf/tests/Build +++ b/tools/perf/tests/Build @@ -31,7 +31,7 @@ perf-y += sample-parsing.o perf-y += parse-no-sample-id-all.o perf-y += kmod-path.o perf-y += thread-map.o -perf-y += llvm.o llvm-src-base.o llvm-src-kbuild.o +perf-y += llvm.o llvm-src-base.o llvm-src-kbuild.o llvm-src-prologue.o perf-y += bpf.o perf-y += topology.o @@ -49,6 +49,13 @@ $(OUTPUT)tests/llvm-src-kbuild.c: tests/bpf-script-test-kbuild.c $(Q)sed -e 's/"/\\"/g' -e 's/\(.*\)/"\1\\n"/g' $< >> $@ $(Q)echo ';' >> $@ +$(OUTPUT)tests/llvm-src-prologue.c: tests/bpf-script-test-prologue.c + $(call rule_mkdir) + $(Q)echo '#include <tests/llvm.h>' > $@ + $(Q)echo 'const char test_llvm__bpf_test_prologue_prog[] =' >> $@ + $(Q)sed -e 's/"/\\"/g' -e 's/\(.*\)/"\1\\n"/g' $< >> $@ + $(Q)echo ';' >> $@ + ifeq ($(ARCH),$(filter $(ARCH),x86 arm arm64)) perf-$(CONFIG_DWARF_UNWIND) += dwarf-unwind.o endif diff --git a/tools/perf/tests/bpf-script-test-prologue.c b/tools/perf/tests/bpf-script-test-prologue.c new file mode 100644 index 000000000000..7230e62c70fc --- /dev/null +++ b/tools/perf/tests/bpf-script-test-prologue.c @@ -0,0 +1,35 @@ +/* + * bpf-script-test-prologue.c + * Test BPF prologue + */ +#ifndef LINUX_VERSION_CODE +# error Need LINUX_VERSION_CODE +# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig' +#endif +#define SEC(NAME) __attribute__((section(NAME), used)) + +#include <uapi/linux/fs.h> + +#define FMODE_READ 0x1 +#define FMODE_WRITE 0x2 + +static void (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) = + (void *) 6; + +SEC("func=null_lseek file->f_mode offset orig") +int bpf_func__null_lseek(void *ctx, int err, unsigned long f_mode, + unsigned long offset, unsigned long orig) +{ + if (err) + return 0; + if (f_mode & FMODE_WRITE) + return 0; + if (offset & 1) + return 0; + if (orig == SEEK_CUR) + return 0; + return 1; +} + +char _license[] SEC("license") = "GPL"; +int _version SEC("version") = LINUX_VERSION_CODE; diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c index 6ebfdee3e2c6..d58442294e9e 100644 --- a/tools/perf/tests/bpf.c +++ b/tools/perf/tests/bpf.c @@ -19,6 +19,29 @@ static int epoll_pwait_loop(void) return 0; } +#ifdef HAVE_BPF_PROLOGUE + +static int llseek_loop(void) +{ + int fds[2], i; + + fds[0] = open("/dev/null", O_RDONLY); + fds[1] = open("/dev/null", O_RDWR); + + if (fds[0] < 0 || fds[1] < 0) + return -1; + + for (i = 0; i < NR_ITERS; i++) { + lseek(fds[i % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET); + lseek(fds[(i + 1) % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET); + } + close(fds[0]); + close(fds[1]); + return 0; +} + +#endif + static struct { enum test_llvm__testcase prog_id; const char *desc; @@ -37,6 +60,17 @@ static struct { &epoll_pwait_loop, (NR_ITERS + 1) / 2, }, +#ifdef HAVE_BPF_PROLOGUE + { + LLVM_TESTCASE_BPF_PROLOGUE, + "Test BPF prologue generation", + "[bpf_prologue_test]", + "fix kbuild first", + "check your vmlinux setting?", + &llseek_loop, + (NR_ITERS + 1) / 4, + }, +#endif }; static int do_test(struct bpf_object *obj, int (*func)(void), diff --git a/tools/perf/tests/llvm.c b/tools/perf/tests/llvm.c index 366e38ba8b49..b4147634fb44 100644 --- a/tools/perf/tests/llvm.c +++ b/tools/perf/tests/llvm.c @@ -44,6 +44,10 @@ static struct { .source = test_llvm__bpf_test_kbuild_prog, .desc = "Test kbuild searching", }, + [LLVM_TESTCASE_BPF_PROLOGUE] = { + .source = test_llvm__bpf_test_prologue_prog, + .desc = "Test BPF prologue generation", + }, }; diff --git a/tools/perf/tests/llvm.h b/tools/perf/tests/llvm.h index d91d8f44efee..5150b4d6ef50 100644 --- a/tools/perf/tests/llvm.h +++ b/tools/perf/tests/llvm.h @@ -6,10 +6,12 @@ extern const char test_llvm__bpf_base_prog[]; extern const char test_llvm__bpf_test_kbuild_prog[]; +extern const char test_llvm__bpf_test_prologue_prog[]; enum test_llvm__testcase { LLVM_TESTCASE_BASE, LLVM_TESTCASE_KBUILD, + LLVM_TESTCASE_BPF_PROLOGUE, __LLVM_TESTCASE_MAX, }; |
