Re: [PATCH] perf jit: move test functionality in to a test

Arnaldo Carvalho de Melo
2019-11-27T15:23:35Z

Em Tue, Nov 26, 2019 at 03:59:13PM -0800, Ian Rogers escreveu:
> Adds a test for minimal jit_write_elf functionality.

Thanks, tested and applied.

- Arnaldo

> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
> tools/perf/tests/Build | 1 +
> tools/perf/tests/builtin-test.c | 4 +++
> tools/perf/tests/genelf.c | 53 +++++++++++++++++++++++++++++++++
> tools/perf/tests/tests.h | 1 +
> tools/perf/util/genelf.c | 46 ----------------------------
> 5 files changed, 59 insertions(+), 46 deletions(-)
> create mode 100644 tools/perf/tests/genelf.c
>
> diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
> index e72accefd669..a738e4a5b301 100644
> --- a/tools/perf/tests/Build
> +++ b/tools/perf/tests/Build
> @@ -54,6 +54,7 @@ perf-y += unit_number__scnprintf.o
> perf-y += mem2node.o
> perf-y += map_groups.o
> perf-y += time-utils-test.o
> +perf-y += genelf.o
>
> $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
> $(call rule_mkdir)
> diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
> index 8b286e9b7549..6ab2e2346aab 100644
> --- a/tools/perf/tests/builtin-test.c
> +++ b/tools/perf/tests/builtin-test.c
> @@ -300,6 +300,10 @@ static struct test generic_tests[] = {
> .desc = "map_groups__merge_in",
> .func = test__map_groups__merge_in,
> },
> + {
> + .desc = "Test jit_write_elf",
> + .func = test__jit_write_elf,
> + },
> {
> .func = NULL,
> },
> diff --git a/tools/perf/tests/genelf.c b/tools/perf/tests/genelf.c
> new file mode 100644
> index 000000000000..d392e9300881
> --- /dev/null
> +++ b/tools/perf/tests/genelf.c
> @@ -0,0 +1,53 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +#include <limits.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <string.h>
> +#include <unistd.h>
> +#include <linux/compiler.h>
> +
> +#include "debug.h"
> +#include "tests.h"
> +
> +
> +#ifdef HAVE_LIBELF_SUPPORT
> +#include <libelf.h>
> +#include "../util/genelf.h"
> +#endif
> +
> +#define TEMPL "/tmp/perf-test-XXXXXX"
> +
> +static unsigned char x86_code[] = {
> + 0xBB, 0x2A, 0x00, 0x00, 0x00, /* movl $42, %ebx */
> + 0xB8, 0x01, 0x00, 0x00, 0x00, /* movl $1, %eax */
> + 0xCD, 0x80 /* int $0x80 */
> +};
> +
> +int test__jit_write_elf(struct test *test __maybe_unused,
> + int subtest __maybe_unused)
> +{
> +#ifdef HAVE_JITDUMP
> + char path[PATH_MAX];
> + int fd, ret;
> +
> + strcpy(path, TEMPL);
> +
> + fd = mkstemp(path);
> + if (fd < 0) {
> + perror("mkstemp failed");
> + return TEST_FAIL;
> + }
> +
> + pr_info("Writing jit code to: %s\n", path);
> +
> + ret = jit_write_elf(fd, 0, "main", x86_code, sizeof(x86_code),
> + NULL, 0, NULL, 0, 0);
> + close(fd);
> +
> + unlink(path);
> +
> + return ret ? TEST_FAIL : 0;
> +#else
> + return TEST_SKIPPED;
> +#endif
> +}
> diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
> index 9837b6e93023..5a53ab7294e9 100644
> --- a/tools/perf/tests/tests.h
> +++ b/tools/perf/tests/tests.h
> @@ -109,6 +109,7 @@ int test__unit_number__scnprint(struct test *test, int subtest);
> int test__mem2node(struct test *t, int subtest);
> int test__map_groups__merge_in(struct test *t, int subtest);
> int test__time_utils(struct test *t, int subtest);
> +int test__jit_write_elf(struct test *test, int subtest);
>
> bool test__bp_signal_is_supported(void);
> bool test__bp_account_is_supported(void);
> diff --git a/tools/perf/util/genelf.c b/tools/perf/util/genelf.c
> index f9f18b8b1df9..aed49806a09b 100644
> --- a/tools/perf/util/genelf.c
> +++ b/tools/perf/util/genelf.c
> @@ -8,15 +8,12 @@
> */
>
> #include <sys/types.h>
> -#include <stdio.h>
> -#include <getopt.h>
> #include <stddef.h>
> #include <libelf.h>
> #include <string.h>
> #include <stdlib.h>
> #include <unistd.h>
> #include <inttypes.h>
> -#include <limits.h>
> #include <fcntl.h>
> #include <err.h>
> #ifdef HAVE_DWARF_SUPPORT
> @@ -31,8 +28,6 @@
> #define NT_GNU_BUILD_ID 3
> #endif
>
> -#define JVMTI
> -
> #define BUILD_ID_URANDOM /* different uuid for each run */
>
> #ifdef HAVE_LIBCRYPTO
> @@ -511,44 +506,3 @@ jit_write_elf(int fd, uint64_t load_addr, const char *sym,
>
> return retval;
> }
> -
> -#ifndef JVMTI
> -
> -static unsigned char x86_code[] = {
> - 0xBB, 0x2A, 0x00, 0x00, 0x00, /* movl $42, %ebx */
> - 0xB8, 0x01, 0x00, 0x00, 0x00, /* movl $1, %eax */
> - 0xCD, 0x80 /* int $0x80 */
> -};
> -
> -static struct options options;
> -
> -int main(int argc, char **argv)
> -{
> - int c, fd, ret;
> -
> - while ((c = getopt(argc, argv, "o:h")) != -1) {
> - switch (c) {
> - case 'o':
> - options.output = optarg;
> - break;
> - case 'h':
> - printf("Usage: genelf -o output_file [-h]\n");
> - return 0;
> - default:
> - errx(1, "unknown option");
> - }
> - }
> -
> - fd = open(options.output, O_CREAT|O_TRUNC|O_RDWR, 0666);
> - if (fd == -1)
> - err(1, "cannot create file %s", options.output);
> -
> - ret = jit_write_elf(fd, "main", x86_code, sizeof(x86_code));
> - close(fd);
> -
> - if (ret != 0)
> - unlink(options.output);
> -
> - return ret;
> -}
> -#endif
> --
> 2.24.0.432.g9d3f5f5b63-goog

--

- Arnaldo