Merge branch 'jb-mr1-release' of https://android.googlesource.com/platform/system/core into mr1

Conflicts:
	adb/Android.mk
	adb/usb_vendors.c
	include/private/android_filesystem_config.h
	include/system/audio.h
	include/system/camera.h
	init/property_service.c
	libnetutils/ifc_utils.c
	mkbootimg/mkbootimg.c
	rootdir/init.rc

Change-Id: Ie42f0c14808e9f8cabd24854bfe15b6667955229

6 files changed, 187 insertions, 436 deletions

diff --git a/libcutils/Android.mk b/libcutils/Android.mk
index 6a2ba663..3051baf7 100644
--- a/libcutils/Android.mk
+++ b/libcutils/Android.mk
@@ -50,7 +50,7 @@ commonSources := \
 	threads.c \
 	sched_policy.c \
 	iosched_policy.c \
-	str_parms.c
+	str_parms.c \
 
 commonHostSources := \
         ashmem-host.c
@@ -75,9 +75,10 @@ ifeq ($(WINDOWS_HOST_ONLY),1)
 else
     commonSources += \
         abort_socket.c \
-        mspace.c \
+        fs.c \
         selector.c \
         tztime.c \
+        multiuser.c \
         zygote.c
 
     commonHostSources += \
@@ -129,16 +130,12 @@ LOCAL_SRC_FILES := $(commonSources) \
 ifeq ($(TARGET_ARCH),arm)
 LOCAL_SRC_FILES += arch-arm/memset32.S
 else  # !arm
-ifeq ($(TARGET_ARCH),sh)
-LOCAL_SRC_FILES += memory.c atomic-android-sh.c
-else  # !sh
 ifeq ($(TARGET_ARCH_VARIANT),x86-atom)
 LOCAL_CFLAGS += -DHAVE_MEMSET16 -DHAVE_MEMSET32
 LOCAL_SRC_FILES += arch-x86/android_memset16.S arch-x86/android_memset32.S memory.c
 else # !x86-atom
 LOCAL_SRC_FILES += memory.c
 endif # !x86-atom
-endif # !sh
 endif # !arm
 
 ifneq ($(TARGET_RECOVERY_PRE_COMMAND),)
diff --git a/libcutils/atomic-android-sh.c b/libcutils/atomic-android-sh.c
deleted file mode 100644
index 8bac68ad..00000000
--- a/libcutils/atomic-android-sh.c
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * Copyright (C) 2007 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <cutils/atomic.h>
-#ifdef HAVE_WIN32_THREADS
-#include <windows.h>
-#else
-#include <sched.h>
-#endif
-
-/*
- * Note :
- *
- * (1) SuperH does not have CMPXCHG.  It has only TAS for atomic
- *     operations.  It does not seem a good idea to implement CMPXCHG,
- *     with TAS.  So, we choose to implemnt these operations with
- *     posix mutexes.  Please be sure that this might cause performance
- *     problem for Android-SH. Using LL/SC instructions supported in SH-X3,
- *     best performnace would be realized.
- *
- * (2) Mutex initialization problem happens, which is commented for
- *     ARM implementation, in this file above.
- *     We follow the fact that the initializer for mutex is a simple zero
- *     value.
- *
- * (3) These operations are NOT safe for SMP, as there is no currently
- *     no definition for a memory barrier operation.
- */
-
-#include <pthread.h>
-
-#define  SWAP_LOCK_COUNT  32U
-static pthread_mutex_t  _swap_locks[SWAP_LOCK_COUNT];
-
-#define  SWAP_LOCK(addr)   \
-   &_swap_locks[((unsigned)(void*)(addr) >> 3U) % SWAP_LOCK_COUNT]
-
-
-int32_t android_atomic_acquire_load(volatile const int32_t* addr)
-{
-    return *addr;
-}
-
-int32_t android_atomic_release_load(volatile const int32_t* addr)
-{
-    return *addr;
-}
-
-void android_atomic_acquire_store(int32_t value, volatile int32_t* addr) {
-    int32_t oldValue;
-    do {
-        oldValue = *addr;
-    } while (android_atomic_release_cas(oldValue, value, addr));
-}
-
-void android_atomic_release_store(int32_t value, volatile int32_t* addr) {
-    int32_t oldValue;
-    do {
-        oldValue = *addr;
-    } while (android_atomic_release_cas(oldValue, value, addr));
-}
-
-int32_t android_atomic_inc(volatile int32_t* addr) {
-    int32_t oldValue;
-    do {
-        oldValue = *addr;
-    } while (android_atomic_release_cas(oldValue, oldValue+1, addr));
-    return oldValue;
-}
-
-int32_t android_atomic_dec(volatile int32_t* addr) {
-    int32_t oldValue;
-    do {
-        oldValue = *addr;
-    } while (android_atomic_release_cas(oldValue, oldValue-1, addr));
-    return oldValue;
-}
-
-int32_t android_atomic_add(int32_t value, volatile int32_t* addr) {
-    int32_t oldValue;
-    do {
-        oldValue = *addr;
-    } while (android_atomic_release_cas(oldValue, oldValue+value, addr));
-    return oldValue;
-}
-
-int32_t android_atomic_and(int32_t value, volatile int32_t* addr) {
-    int32_t oldValue;
-    do {
-        oldValue = *addr;
-    } while (android_atomic_release_cas(oldValue, oldValue&value, addr));
-    return oldValue;
-}
-
-int32_t android_atomic_or(int32_t value, volatile int32_t* addr) {
-    int32_t oldValue;
-    do {
-        oldValue = *addr;
-    } while (android_atomic_release_cas(oldValue, oldValue|value, addr));
-    return oldValue;
-}
-
-int android_atomic_acquire_cmpxchg(int32_t oldvalue, int32_t newvalue,
-                           volatile int32_t* addr) {
-    return android_atomic_release_cmpxchg(oldValue, newValue, addr);
-}
-
-int android_atomic_release_cmpxchg(int32_t oldvalue, int32_t newvalue,
-                           volatile int32_t* addr) {
-    int result;
-    pthread_mutex_t*  lock = SWAP_LOCK(addr);
-
-    pthread_mutex_lock(lock);
-
-    if (*addr == oldvalue) {
-        *addr  = newvalue;
-        result = 0;
-    } else {
-        result = 1;
-    }
-    pthread_mutex_unlock(lock);
-    return result;
-}
-
diff --git a/libcutils/dlmalloc_stubs.c b/libcutils/dlmalloc_stubs.c
index 1ced147b..c327a55a 100644
--- a/libcutils/dlmalloc_stubs.c
+++ b/libcutils/dlmalloc_stubs.c
@@ -14,16 +14,22 @@
  * limitations under the License.
  */
 
-/* No-op stubs for functions defined in system/bionic/bionic/dlmalloc.c.
- */
-void dlmalloc_walk_free_pages()
-{
-}
+#include "../../../bionic/libc/bionic/dlmalloc.h"
+#include "cutils/log.h"
 
-void dlmalloc_walk_heap()
+/*
+ * Stubs for functions defined in bionic/libc/bionic/dlmalloc.c. These
+ * are used in host builds, as the host libc will not contain these
+ * functions.
+ */
+void dlmalloc_inspect_all(void(*handler)(void*, void *, size_t, void*),
+                          void* arg)
 {
+  ALOGW("Called host unimplemented stub: dlmalloc_inspect_all");
 }
 
-void dlmalloc_trim()
+int dlmalloc_trim(size_t unused)
 {
+  ALOGW("Called host unimplemented stub: dlmalloc_trim");
+  return 0;
 }
diff --git a/libcutils/fs.c b/libcutils/fs.c
new file mode 100644
index 00000000..1226d447
--- /dev/null
+++ b/libcutils/fs.c
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "cutils"
+
+#include <cutils/fs.h>
+#include <cutils/log.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <limits.h>
+
+#define ALL_PERMS (S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO)
+#define BUF_SIZE 64
+
+int fs_prepare_dir(const char* path, mode_t mode, uid_t uid, gid_t gid) {
+    // Check if path needs to be created
+    struct stat sb;
+    if (TEMP_FAILURE_RETRY(lstat(path, &sb)) == -1) {
+        if (errno == ENOENT) {
+            goto create;
+        } else {
+            ALOGE("Failed to lstat(%s): %s", path, strerror(errno));
+            return -1;
+        }
+    }
+
+    // Exists, verify status
+    if (!S_ISDIR(sb.st_mode)) {
+        ALOGE("Not a directory: %s", path);
+        return -1;
+    }
+    if (((sb.st_mode & ALL_PERMS) == mode) && (sb.st_uid == uid) && (sb.st_gid == gid)) {
+        return 0;
+    } else {
+        goto fixup;
+    }
+
+create:
+    if (TEMP_FAILURE_RETRY(mkdir(path, mode)) == -1) {
+        if (errno != EEXIST) {
+            ALOGE("Failed to mkdir(%s): %s", path, strerror(errno));
+            return -1;
+        }
+    }
+
+fixup:
+    if (TEMP_FAILURE_RETRY(chmod(path, mode)) == -1) {
+        ALOGE("Failed to chmod(%s, %d): %s", path, mode, strerror(errno));
+        return -1;
+    }
+    if (TEMP_FAILURE_RETRY(chown(path, uid, gid)) == -1) {
+        ALOGE("Failed to chown(%s, %d, %d): %s", path, uid, gid, strerror(errno));
+        return -1;
+    }
+
+    return 0;
+}
+
+int fs_read_atomic_int(const char* path, int* out_value) {
+    int fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY));
+    if (fd == -1) {
+        ALOGE("Failed to read %s: %s", path, strerror(errno));
+        return -1;
+    }
+
+    char buf[BUF_SIZE];
+    if (TEMP_FAILURE_RETRY(read(fd, buf, BUF_SIZE)) == -1) {
+        ALOGE("Failed to read %s: %s", path, strerror(errno));
+        goto fail;
+    }
+    if (sscanf(buf, "%d", out_value) != 1) {
+        ALOGE("Failed to parse %s: %s", path, strerror(errno));
+        goto fail;
+    }
+    close(fd);
+    return 0;
+
+fail:
+    close(fd);
+    *out_value = -1;
+    return -1;
+}
+
+int fs_write_atomic_int(const char* path, int value) {
+    char temp[PATH_MAX];
+    if (snprintf(temp, PATH_MAX, "%s.XXXXXX", path) >= PATH_MAX) {
+        ALOGE("Path too long");
+        return -1;
+    }
+
+    int fd = TEMP_FAILURE_RETRY(mkstemp(temp));
+    if (fd == -1) {
+        ALOGE("Failed to open %s: %s", temp, strerror(errno));
+        return -1;
+    }
+
+    char buf[BUF_SIZE];
+    int len = snprintf(buf, BUF_SIZE, "%d", value) + 1;
+    if (len > BUF_SIZE) {
+        ALOGE("Value %d too large: %s", value, strerror(errno));
+        goto fail;
+    }
+    if (TEMP_FAILURE_RETRY(write(fd, buf, len)) < len) {
+        ALOGE("Failed to write %s: %s", temp, strerror(errno));
+        goto fail;
+    }
+    if (close(fd) == -1) {
+        ALOGE("Failed to close %s: %s", temp, strerror(errno));
+        goto fail_closed;
+    }
+
+    if (rename(temp, path) == -1) {
+        ALOGE("Failed to rename %s to %s: %s", temp, path, strerror(errno));
+        goto fail_closed;
+    }
+
+    return 0;
+
+fail:
+    close(fd);
+fail_closed:
+    unlink(temp);
+    return -1;
+}
diff --git a/libcutils/mspace.c b/libcutils/mspace.c
deleted file mode 100644
index 6d3b35c8..00000000
--- a/libcutils/mspace.c
+++ /dev/null
@@ -1,286 +0,0 @@
-/* Copyright 2006 The Android Open Source Project */
-
-/* A wrapper file for dlmalloc.c that compiles in the
- * mspace_*() functions, which provide an interface for
- * creating multiple heaps.
- */
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdint.h>
-#include <sys/ioctl.h>
-
-#include <cutils/ashmem.h>
-
-/* It's a pain getting the mallinfo stuff to work
- * with Linux, OSX, and klibc, so just turn it off
- * for now.
- * TODO: make mallinfo work
- */
-#define NO_MALLINFO 1
-
-/* Allow setting the maximum heap footprint.
- */
-#define USE_MAX_ALLOWED_FOOTPRINT 1
-
-/* Don't try to trim memory.
- * TODO: support this.
- */
-#define MORECORE_CANNOT_TRIM 1
-
-/* Use mmap()d anonymous memory to guarantee
- * that an mspace is contiguous.
- *
- * create_mspace() won't work right if this is
- * defined, so hide the definition of it and
- * break any users at build time.
- */
-#define USE_CONTIGUOUS_MSPACES 1
-#if USE_CONTIGUOUS_MSPACES
-/* This combination of settings forces sys_alloc()
- * to always use MORECORE().  It won't expect the
- * results to be contiguous, but we'll guarantee
- * that they are.
- */
-#define HAVE_MMAP 0
-#define HAVE_MORECORE 1
-#define MORECORE_CONTIGUOUS 0
-/* m is always the appropriate local when MORECORE() is called. */
-#define MORECORE(S) contiguous_mspace_morecore(m, S)
-#define create_mspace   HIDDEN_create_mspace_HIDDEN
-#define destroy_mspace   HIDDEN_destroy_mspace_HIDDEN
-typedef struct malloc_state *mstate0;
-static void *contiguous_mspace_morecore(mstate0 m, ssize_t nb);
-#endif
-
-#define MSPACES 1
-#define ONLY_MSPACES 1
-#include "../../../bionic/libc/bionic/dlmalloc.c"
-
-#ifndef PAGESIZE
-#define PAGESIZE  mparams.page_size
-#endif
-
-#define ALIGN_UP(p, alignment) \
-    (((uintptr_t)(p) + (alignment)-1) & ~((alignment)-1))
-
-/* A direct copy of dlmalloc_usable_size(),
- * which isn't compiled in when ONLY_MSPACES is set.
- * The mspace parameter isn't actually necessary,
- * but we include it to be consistent with the
- * rest of the mspace_*() functions.
- */
-size_t mspace_usable_size(mspace _unused, const void* mem) {
-  if (mem != 0) {
-    const mchunkptr p = mem2chunk(mem);
-    if (cinuse(p))
-      return chunksize(p) - overhead_for(p);
-  }
-  return 0;
-}
-
-#if USE_CONTIGUOUS_MSPACES
-#include <sys/mman.h>
-#include <limits.h>
-
-#define CONTIG_STATE_MAGIC  0xf00dd00d
-struct mspace_contig_state {
-  unsigned int magic;
-  char *brk;
-  char *top;
-  mspace m;
-};
-
-static void *contiguous_mspace_morecore(mstate m, ssize_t nb) {
-  struct mspace_contig_state *cs;
-  char *oldbrk;
-  const unsigned int pagesize = PAGESIZE;
-
-  cs = (struct mspace_contig_state *)((uintptr_t)m & ~(pagesize-1));
-  assert(cs->magic == CONTIG_STATE_MAGIC);
-  assert(cs->m == m);
-assert(nb >= 0);  //xxx deal with the trim case
-
-  oldbrk = cs->brk;
-  if (nb > 0) {
-    /* Break to the first page boundary that satisfies the request.
-     */
-    char *newbrk = (char *)ALIGN_UP(oldbrk + nb, pagesize);
-    if (newbrk > cs->top)
-      return CMFAIL;
-
-    /* Update the protection on the underlying memory.
-     * Pages we've given to dlmalloc are read/write, and
-     * pages we haven't are not accessable (read or write
-     * will cause a seg fault).
-     */
-    if (mprotect(cs, newbrk - (char *)cs, PROT_READ | PROT_WRITE) < 0)
-      return CMFAIL;
-    if (newbrk != cs->top) {
-      if (mprotect(newbrk, cs->top - newbrk, PROT_NONE) < 0)
-        return CMFAIL;
-    }
-
-    cs->brk = newbrk;
-
-    /* Make sure that dlmalloc will merge this block with the
-     * initial block that was passed to create_mspace_with_base().
-     * We don't care about extern vs. non-extern, so just clear it.
-     */
-    m->seg.sflags &= ~EXTERN_BIT;
-  }
-
-  return oldbrk;
-}
-
-mspace create_contiguous_mspace_with_base(size_t starting_capacity,
-    size_t max_capacity, int locked, void *base) {
-  struct mspace_contig_state *cs;
-  unsigned int pagesize;
-  mstate m;
-
-  init_mparams();
-  pagesize = PAGESIZE;
-  assert(starting_capacity <= max_capacity);
-  assert(((uintptr_t)base & (pagesize-1)) == 0);
-  assert(((uintptr_t)max_capacity & (pagesize-1)) == 0);
-  starting_capacity = (size_t)ALIGN_UP(starting_capacity, pagesize);
-
-  /* Make the first page read/write. dlmalloc needs to use that page.
-   */
-  if (mprotect(base, starting_capacity, PROT_READ | PROT_WRITE) < 0) {
-    goto error;
-  }
-
-  /* Create the mspace, pointing to the memory given.
-   */
-  m = create_mspace_with_base((char *)base + sizeof(*cs), starting_capacity,
-                              locked);
-  if (m == (mspace)0) {
-    goto error;
-  }
-  /* Make sure that m is in the same page as base.
-   */
-  assert(((uintptr_t)m & (uintptr_t)~(pagesize-1)) == (uintptr_t)base);
-  /* Use some space for the information that our MORECORE needs.
-   */
-  cs = (struct mspace_contig_state *)base;
-
-  /* Find out exactly how much of the memory the mspace
-   * is using.
-   */
-  cs->brk = m->seg.base + m->seg.size;
-  cs->top = (char *)base + max_capacity;
-
-  assert((char *)base <= cs->brk);
-  assert(cs->brk <= cs->top);
-  /* Prevent access to the memory we haven't handed out yet.
-   */
-  if (cs->brk != cs->top) {
-    /* mprotect() requires page-aligned arguments, but it's possible
-     * for cs->brk not to be page-aligned at this point.
-     */
-    char *prot_brk = (char *)ALIGN_UP(cs->brk, pagesize);
-    if ((mprotect(base, prot_brk - (char *)base, PROT_READ | PROT_WRITE) < 0) ||
-        (mprotect(prot_brk, cs->top - prot_brk, PROT_NONE) < 0)) {
-      goto error;
-    }
-  }
-
-  cs->m = m;
-  cs->magic = CONTIG_STATE_MAGIC;
-
-  return (mspace)m;
-
-error:
-  return (mspace)0;
-}
-
-
-mspace create_contiguous_mspace_with_name(size_t starting_capacity,
-    size_t max_capacity, int locked, char const *name) {
-  int fd, ret;
-  char buf[ASHMEM_NAME_LEN] = "mspace";
-  void *base;
-  unsigned int pagesize;
-  mstate m;
-
-  if (starting_capacity > max_capacity)
-    return (mspace)0;
-
-  init_mparams();
-  pagesize = PAGESIZE;
-
-  /* Create the anonymous memory that will back the mspace.
-   * This reserves all of the virtual address space we could
-   * ever need.  Physical pages will be mapped as the memory
-   * is touched.
-   *
-   * Align max_capacity to a whole page.
-   */
-  max_capacity = (size_t)ALIGN_UP(max_capacity, pagesize);
-
-  if (name)
-    snprintf(buf, sizeof(buf), "mspace/%s", name);
-  fd = ashmem_create_region(buf, max_capacity);
-  if (fd < 0)
-    return (mspace)0;
-
-  base = mmap(NULL, max_capacity, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
-  close(fd);
-  if (base == MAP_FAILED)
-    return (mspace)0;
-
-  /* Make sure that base is at the beginning of a page.
-   */
-  assert(((uintptr_t)base & (pagesize-1)) == 0);
-
-  m = create_contiguous_mspace_with_base(starting_capacity, max_capacity,
-                                         locked, base);
-  if (m == 0) {
-    munmap(base, max_capacity);
-  }
-  return m;
-}
-
-mspace create_contiguous_mspace(size_t starting_capacity,
-    size_t max_capacity, int locked) {
-  return create_contiguous_mspace_with_name(starting_capacity,
-      max_capacity, locked, NULL);
-}
-
-size_t destroy_contiguous_mspace(mspace msp) {
-  mstate ms = (mstate)msp;
-
-  if (ok_magic(ms)) {
-    struct mspace_contig_state *cs;
-    size_t length;
-    const unsigned int pagesize = PAGESIZE;
-
-    cs = (struct mspace_contig_state *)((uintptr_t)ms & ~(pagesize-1));
-    assert(cs->magic == CONTIG_STATE_MAGIC);
-    assert(cs->m == ms);
-
-    length = cs->top - (char *)cs;
-    if (munmap((char *)cs, length) != 0)
-      return length;
-  }
-  else {
-    USAGE_ERROR_ACTION(ms, ms);
-  }
-  return 0;
-}
-
-void *contiguous_mspace_sbrk0(mspace msp) {
-    struct mspace_contig_state *cs;
-    mstate ms;
-    const unsigned int pagesize = PAGESIZE;
-
-    ms = (mstate)msp;
-    cs = (struct mspace_contig_state *)((uintptr_t)ms & ~(pagesize-1));
-    assert(cs->magic == CONTIG_STATE_MAGIC);
-    assert(cs->m == ms);
-    return cs->brk;
-}
-#endif
diff --git a/libcutils/multiuser.c b/libcutils/multiuser.c
new file mode 100644
index 00000000..7c74bb86
--- /dev/null
+++ b/libcutils/multiuser.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <cutils/multiuser.h>
+
+userid_t multiuser_get_user_id(uid_t uid) {
+    return uid / MULTIUSER_APP_PER_USER_RANGE;
+}
+
+appid_t multiuser_get_app_id(uid_t uid) {
+    return uid % MULTIUSER_APP_PER_USER_RANGE;
+}
+
+uid_t multiuser_get_uid(userid_t userId, appid_t appId) {
+    return userId * MULTIUSER_APP_PER_USER_RANGE + (appId % MULTIUSER_APP_PER_USER_RANGE);
+}