perf hists: Enlarge pid sort entry size

[deliverable/linux.git] / tools / perf / util / llvm-utils.c

diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c
index 33071d6159bccd9c7b011d22e9550951f745faa9..878a566763c3e2c61bb9ff9debef9b3727c90a30 100644 (file)
--- a/tools/perf/util/llvm-utils.c
+++ b/tools/perf/util/llvm-utils.c
@@ -42,6 +42,8 @@ int perf_llvm_config(const char *var, const char *value)
                llvm_param.kbuild_dir = strdup(value);
        else if (!strcmp(var, "kbuild-opts"))
                llvm_param.kbuild_opts = strdup(value);
+       else if (!strcmp(var, "dump-obj"))
+               llvm_param.dump_obj = !!perf_config_bool(var, value);
        else
                return -1;
        llvm_param.user_set_param = true;
@@ -326,6 +328,42 @@ get_kbuild_opts(char **kbuild_dir, char **kbuild_include_opts)
        pr_debug("include option is set to %s\n", *kbuild_include_opts);
 }
 
+static void
+dump_obj(const char *path, void *obj_buf, size_t size)
+{
+       char *obj_path = strdup(path);
+       FILE *fp;
+       char *p;
+
+       if (!obj_path) {
+               pr_warning("WARNING: No enough memory, skip object dumping\n");
+               return;
+       }
+
+       p = strrchr(obj_path, '.');
+       if (!p || (strcmp(p, ".c") != 0)) {
+               pr_warning("WARNING: invalid llvm source path: '%s', skip object dumping\n",
+                          obj_path);
+               goto out;
+       }
+
+       p[1] = 'o';
+       fp = fopen(obj_path, "wb");
+       if (!fp) {
+               pr_warning("WARNING: failed to open '%s': %s, skip object dumping\n",
+                          obj_path, strerror(errno));
+               goto out;
+       }
+
+       pr_info("LLVM: dumping %s\n", obj_path);
+       if (fwrite(obj_buf, size, 1, fp) != 1)
+               pr_warning("WARNING: failed to write to file '%s': %s, skip object dumping\n",
+                          obj_path, strerror(errno));
+       fclose(fp);
+out:
+       free(obj_path);
+}
+
 int llvm__compile_bpf(const char *path, void **p_obj_buf,
                      size_t *p_obj_buf_sz)
 {
@@ -411,6 +449,10 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
 
        free(kbuild_dir);
        free(kbuild_include_opts);
+
+       if (llvm_param.dump_obj)
+               dump_obj(path, obj_buf, obj_buf_sz);
+
        if (!p_obj_buf)
                free(obj_buf);
        else