597bdeb4ab
According to [1], 'perf test' should avoid output too much information if '-v' is not set, only 'Ok', 'FAIL' or 'Skip' need to be printed. This patch removes several messages sent directly to stderr to make the output clean. Before this patch: # perf test dummy 23: Test using a dummy software event to keep tracking : (not supported) Ok After this patch: # perf test dummy 23: Test using a dummy software event to keep tracking : Skip [1] http://lkml.kernel.org/r/20151020134155.GE4400@redhat.com Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1446547486-229499-2-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
#include <stdio.h>
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#include <bpf/libbpf.h>
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#include <util/llvm-utils.h>
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#include <util/cache.h>
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#include "tests.h"
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#include "debug.h"
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static int perf_config_cb(const char *var, const char *val,
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void *arg __maybe_unused)
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{
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return perf_default_config(var, val, arg);
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}
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/*
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* Randomly give it a "version" section since we don't really load it
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* into kernel
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*/
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static const char test_bpf_prog[] =
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"__attribute__((section(\"do_fork\"), used)) "
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"int fork(void *ctx) {return 0;} "
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"char _license[] __attribute__((section(\"license\"), used)) = \"GPL\";"
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"int _version __attribute__((section(\"version\"), used)) = 0x40100;";
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#ifdef HAVE_LIBBPF_SUPPORT
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static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
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{
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struct bpf_object *obj;
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obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, NULL);
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if (!obj)
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return -1;
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bpf_object__close(obj);
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return 0;
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}
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#else
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static int test__bpf_parsing(void *obj_buf __maybe_unused,
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size_t obj_buf_sz __maybe_unused)
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{
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pr_debug("Skip bpf parsing\n");
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return 0;
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}
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#endif
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int test__llvm(void)
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{
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char *tmpl_new, *clang_opt_new;
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void *obj_buf;
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size_t obj_buf_sz;
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int err, old_verbose;
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perf_config(perf_config_cb, NULL);
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/*
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* Skip this test if user's .perfconfig doesn't set [llvm] section
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* and clang is not found in $PATH, and this is not perf test -v
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*/
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if (verbose == 0 && !llvm_param.user_set_param && llvm__search_clang()) {
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pr_debug("No clang and no verbosive, skip this test\n");
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return TEST_SKIP;
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}
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old_verbose = verbose;
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/*
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* llvm is verbosity when error. Suppress all error output if
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* not 'perf test -v'.
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*/
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if (verbose == 0)
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verbose = -1;
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if (!llvm_param.clang_bpf_cmd_template)
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return -1;
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if (!llvm_param.clang_opt)
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llvm_param.clang_opt = strdup("");
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err = asprintf(&tmpl_new, "echo '%s' | %s", test_bpf_prog,
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llvm_param.clang_bpf_cmd_template);
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if (err < 0)
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return -1;
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err = asprintf(&clang_opt_new, "-xc %s", llvm_param.clang_opt);
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if (err < 0)
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return -1;
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llvm_param.clang_bpf_cmd_template = tmpl_new;
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llvm_param.clang_opt = clang_opt_new;
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err = llvm__compile_bpf("-", &obj_buf, &obj_buf_sz);
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verbose = old_verbose;
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if (err)
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return TEST_FAIL;
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err = test__bpf_parsing(obj_buf, obj_buf_sz);
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free(obj_buf);
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return err;
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}
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