perf tools: Try to find cross-built objdump path

As we have architecture information of saved perf.data file, we can try
to find cross-built objdump path.

The triplets include support for Android (arm, x86 and mips
architectures).

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Originally-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1350344020-8071-5-git-send-email-irina.tirdea@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 6790cb4..78a81ed 100644 (file)
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -426,6 +426,8 @@ LIB_OBJS += $(OUTPUT)ui/helpline.o
 LIB_OBJS += $(OUTPUT)ui/hist.o
 LIB_OBJS += $(OUTPUT)ui/stdio/hist.o
 
+LIB_OBJS += $(OUTPUT)arch/common.o
+
 BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
 BUILTIN_OBJS += $(OUTPUT)builtin-bench.o
 # Benchmark modules

diff --git a/tools/perf/arch/common.c b/tools/perf/arch/common.c
new file mode 100644 (file)
index 0000000..2367b25
--- /dev/null
+++ b/tools/perf/arch/common.c
@@ -0,0 +1,178 @@
+#include <stdio.h>
+#include <sys/utsname.h>
+#include "common.h"
+#include "../util/debug.h"
+
+const char *const arm_triplets[] = {
+       "arm-eabi-",
+       "arm-linux-androideabi-",
+       "arm-unknown-linux-",
+       "arm-unknown-linux-gnu-",
+       "arm-unknown-linux-gnueabi-",
+       NULL
+};
+
+const char *const powerpc_triplets[] = {
+       "powerpc-unknown-linux-gnu-",
+       "powerpc64-unknown-linux-gnu-",
+       NULL
+};
+
+const char *const s390_triplets[] = {
+       "s390-ibm-linux-",
+       NULL
+};
+
+const char *const sh_triplets[] = {
+       "sh-unknown-linux-gnu-",
+       "sh64-unknown-linux-gnu-",
+       NULL
+};
+
+const char *const sparc_triplets[] = {
+       "sparc-unknown-linux-gnu-",
+       "sparc64-unknown-linux-gnu-",
+       NULL
+};
+
+const char *const x86_triplets[] = {
+       "x86_64-pc-linux-gnu-",
+       "x86_64-unknown-linux-gnu-",
+       "i686-pc-linux-gnu-",
+       "i586-pc-linux-gnu-",
+       "i486-pc-linux-gnu-",
+       "i386-pc-linux-gnu-",
+       "i686-linux-android-",
+       "i686-android-linux-",
+       NULL
+};
+
+const char *const mips_triplets[] = {
+       "mips-unknown-linux-gnu-",
+       "mipsel-linux-android-",
+       NULL
+};
+
+static bool lookup_path(char *name)
+{
+       bool found = false;
+       char *path, *tmp;
+       char buf[PATH_MAX];
+       char *env = getenv("PATH");
+
+       if (!env)
+               return false;
+
+       env = strdup(env);
+       if (!env)
+               return false;
+
+       path = strtok_r(env, ":", &tmp);
+       while (path) {
+               scnprintf(buf, sizeof(buf), "%s/%s", path, name);
+               if (access(buf, F_OK) == 0) {
+                       found = true;
+                       break;
+               }
+               path = strtok_r(NULL, ":", &tmp);
+       }
+       free(env);
+       return found;
+}
+
+static int lookup_triplets(const char *const *triplets, const char *name)
+{
+       int i;
+       char buf[PATH_MAX];
+
+       for (i = 0; triplets[i] != NULL; i++) {
+               scnprintf(buf, sizeof(buf), "%s%s", triplets[i], name);
+               if (lookup_path(buf))
+                       return i;
+       }
+       return -1;
+}
+
+static int perf_session_env__lookup_binutils_path(struct perf_session_env *env,
+                                                 const char *name,
+                                                 const char **path)
+{
+       int idx;
+       char *arch, *cross_env;
+       struct utsname uts;
+       const char *const *path_list;
+       char *buf = NULL;
+
+       if (uname(&uts) < 0)
+               goto out;
+
+       /*
+        * We don't need to try to find objdump path for native system.
+        * Just use default binutils path (e.g.: "objdump").
+        */
+       if (!strcmp(uts.machine, env->arch))
+               goto out;
+
+       cross_env = getenv("CROSS_COMPILE");
+       if (cross_env) {
+               if (asprintf(&buf, "%s%s", cross_env, name) < 0)
+                       goto out_error;
+               if (buf[0] == '/') {
+                       if (access(buf, F_OK) == 0)
+                               goto out;
+                       goto out_error;
+               }
+               if (lookup_path(buf))
+                       goto out;
+               free(buf);
+       }
+
+       arch = env->arch;
+
+       if (!strcmp(arch, "arm"))
+               path_list = arm_triplets;
+       else if (!strcmp(arch, "powerpc"))
+               path_list = powerpc_triplets;
+       else if (!strcmp(arch, "sh"))
+               path_list = sh_triplets;
+       else if (!strcmp(arch, "s390"))
+               path_list = s390_triplets;
+       else if (!strcmp(arch, "sparc"))
+               path_list = sparc_triplets;
+       else if (!strcmp(arch, "x86") || !strcmp(arch, "i386") ||
+                !strcmp(arch, "i486") || !strcmp(arch, "i586") ||
+                !strcmp(arch, "i686"))
+               path_list = x86_triplets;
+       else if (!strcmp(arch, "mips"))
+               path_list = mips_triplets;
+       else {
+               ui__error("binutils for %s not supported.\n", arch);
+               goto out_error;
+       }
+
+       idx = lookup_triplets(path_list, name);
+       if (idx < 0) {
+               ui__error("Please install %s for %s.\n"
+                         "You can add it to PATH, set CROSS_COMPILE or "
+                         "override the default using --%s.\n",
+                         name, arch, name);
+               goto out_error;
+       }
+
+       if (asprintf(&buf, "%s%s", path_list[idx], name) < 0)
+               goto out_error;
+
+out:
+       *path = buf;
+       return 0;
+out_error:
+       free(buf);
+       *path = NULL;
+       return -1;
+}
+
+int perf_session_env__lookup_objdump(struct perf_session_env *env)
+{
+       return perf_session_env__lookup_binutils_path(env, "objdump",
+                                                     &objdump_path);
+}

diff --git a/tools/perf/arch/common.h b/tools/perf/arch/common.h
new file mode 100644 (file)
index 0000000..ede246e
--- /dev/null
+++ b/tools/perf/arch/common.h
@@ -0,0 +1,10 @@
+#ifndef ARCH_PERF_COMMON_H
+#define ARCH_PERF_COMMON_H
+
+#include "../util/session.h"
+
+extern const char *objdump_path;
+
+int perf_session_env__lookup_objdump(struct perf_session_env *env);
+
+#endif /* ARCH_PERF_COMMON_H */

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 690fa9a..c4bb645 100644 (file)
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -28,6 +28,7 @@
 #include "util/hist.h"
 #include "util/session.h"
 #include "util/tool.h"
+#include "arch/common.h"
 
 #include <linux/bitmap.h>
 
@@ -186,6 +187,12 @@ static int __cmd_annotate(struct perf_annotate *ann)
                        goto out_delete;
        }
 
+       if (!objdump_path) {
+               ret = perf_session_env__lookup_objdump(&session->header.env);
+               if (ret)
+                       goto out_delete;
+       }
+
        ret = perf_session__process_events(session, &ann->tool);
        if (ret)
                goto out_delete;

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 5104a40..90d1162 100644 (file)
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -33,6 +33,7 @@
 #include "util/thread.h"
 #include "util/sort.h"
 #include "util/hist.h"
+#include "arch/common.h"
 
 #include <linux/bitmap.h>
 
@@ -672,6 +673,12 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
        has_br_stack = perf_header__has_feat(&session->header,
                                             HEADER_BRANCH_STACK);
 
+       if (!objdump_path) {
+               ret = perf_session_env__lookup_objdump(&session->header.env);
+               if (ret)
+                       goto error;
+       }
+
        if (sort__branch_mode == -1 && has_br_stack)
                sort__branch_mode = 1;
 

diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 39242dc..a4dd25a 100644 (file)
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -154,6 +154,5 @@ static inline int symbol__tui_annotate(struct symbol *sym __maybe_unused,
 #endif
 
 extern const char      *disassembler_style;
-extern const char      *objdump_path;
 
 #endif /* __PERF_ANNOTATE_H */