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Date: Tue, 20 May 2014 11:48:50 +0200
From: Stephane Eranian <eranian@...gle.com>
To: linux-kernel@...r.kernel.org
Cc: peterz@...radead.org, mingo@...e.hu, acme@...hat.com,
jolsa@...hat.com, namhyung@...nel.org, dsahern@...il.com,
Michael Lentine <mlentine@...gle.com>
Subject: [PATCH v2 2/2] perf tools: add automatic remapping of Android libraries
From: Michael Lentine <mlentine@...gle.com>
This patch automtically adjusts the path of MMAP records
associated with Android system libraries.
The Android system is organized with system libraries found in
/system/lib and user libraries in /data/app-lib. On the host system
(not running Android), system libraries can be found in the downloaded
NDK directory under ${NDK_ROOT}/platforms/${APP_PLATFORM}/arch-${ARCH}/usr/lib
and the user libraries are installed under libs/${APP_ABI} within
the apk build directory. This patch makes running the reporting
tools possible on the host system using the libraries from the NDK.
Reviewed-by: Stephane Eranian <eranian@...gle.com>
Signed-off-by: Michael Lentine <mlentine@...gle.com>
---
tools/perf/util/map.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 94 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index ba5f5c0c..e1974e7 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -32,6 +32,93 @@ static inline int is_no_dso_memory(const char *filename)
!strcmp(filename, "[heap]");
}
+static inline int is_android_lib(const char *filename)
+{
+ return !strncmp(filename, "/data/app-lib", 13) ||
+ !strncmp(filename, "/system/lib", 11);
+}
+
+static inline bool replace_android_lib(const char *filename, char *newfilename)
+{
+ const char *libname;
+ char *app_abi;
+ size_t app_abi_length, new_length;
+ size_t lib_length = 0;
+
+ libname = strrchr(filename, '/');
+ if (libname)
+ lib_length = strlen(libname);
+
+ app_abi = getenv("APP_ABI");
+ if (!app_abi)
+ return false;
+
+ app_abi_length = strlen(app_abi);
+
+ if (!strncmp(filename, "/data/app-lib", 13)) {
+ char *apk_path;
+
+ if (!app_abi_length)
+ return false;
+
+ new_length = 7 + app_abi_length + lib_length;
+
+ apk_path = getenv("APK_PATH");
+ if(apk_path) {
+ new_length += strlen(apk_path) + 1;
+ if(new_length > PATH_MAX)
+ return false;
+ snprintf(newfilename, new_length,
+ "%s/libs/%s/%s", apk_path, app_abi, libname);
+ } else {
+ if(new_length > PATH_MAX)
+ return false;
+ snprintf(newfilename, new_length,
+ "libs/%s/%s", app_abi, libname);
+ }
+ return true;
+ }
+
+ if (!strncmp(filename, "/system/lib/", 11)) {
+ char *ndk, *app;
+ const char *arch;
+ size_t ndk_length;
+ size_t app_length;
+
+ ndk = getenv("NDK_ROOT");
+ app = getenv("APP_PLATFORM");
+
+ if (!(ndk && app))
+ return false;
+
+ ndk_length = strlen(ndk);
+ app_length = strlen(app);
+
+ if (!(ndk_length && app_length && app_abi_length))
+ return false;
+
+ arch = !strncmp(app_abi, "arm", 3) ? "arm" :
+ !strncmp(app_abi, "mips", 4) ? "mips" :
+ !strncmp(app_abi, "x86", 3) ? "x86" : NULL;
+
+ if (!arch)
+ return false;
+
+ new_length = 27 + ndk_length +
+ app_length + lib_length
+ + strlen(arch);
+
+ if(new_length > PATH_MAX)
+ return false;
+ snprintf(newfilename, new_length,
+ "%s/platforms/%s/arch-%s/usr/lib/%s",
+ ndk, app, arch, libname);
+
+ return true;
+ }
+ return false;
+}
+
void map__init(struct map *map, enum map_type type,
u64 start, u64 end, u64 pgoff, struct dso *dso)
{
@@ -59,8 +146,9 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
if (map != NULL) {
char newfilename[PATH_MAX];
struct dso *dso;
- int anon, no_dso, vdso;
+ int anon, no_dso, vdso, android;
+ android = is_android_lib(filename);
anon = is_anon_memory(filename);
vdso = is_vdso_map(filename);
no_dso = is_no_dso_memory(filename);
@@ -75,6 +163,11 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
filename = newfilename;
}
+ if (android) {
+ if (replace_android_lib(filename, newfilename))
+ filename = newfilename;
+ }
+
if (vdso) {
pgoff = 0;
dso = vdso__dso_findnew(dsos__list);
--
1.9.1.423.g4596e3a
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