Adds a test for minimal jit_write_elf functionality.
Committer testing:
# perf test jit
61: Test jit_write_elf : Ok
#
# perf test -v jit
61: Test jit_write_elf :
--- start ---
test child forked, pid 10460
Writing jit code to: /tmp/perf-test-KqxURR
test child finished with 0
---- end ----
Test jit_write_elf: Ok
#
Committer notes:
Fix up the case where HAVE_JITDUMP is no defined.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexios Zavras <alexios.zavras@intel.com>
Cc: Allison Randal <allison@lohutok.net>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lore.kernel.org/lkml/20191126235913.41855-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
perf-y += mem2node.o
perf-y += maps.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)
.func = test__time_utils,
},
{
+ .desc = "Test jit_write_elf",
+ .func = test__jit_write_elf,
+ },
+ {
.desc = "maps__merge_in",
.func = test__maps__merge_in,
},
--- /dev/null
+// 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_JITDUMP
+#include <libelf.h>
+#include "../util/genelf.h"
+#endif
+
+#define TEMPL "/tmp/perf-test-XXXXXX"
+
+int test__jit_write_elf(struct test *test __maybe_unused,
+ int subtest __maybe_unused)
+{
+#ifdef HAVE_JITDUMP
+ 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 */
+ };
+ 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_SKIP;
+#endif
+}
int test__mem2node(struct test *t, int subtest);
int test__maps__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);
*/
#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
#define NT_GNU_BUILD_ID 3
#endif
-#define JVMTI
-
#define BUILD_ID_URANDOM /* different uuid for each run */
#ifdef HAVE_LIBCRYPTO
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