1 files changed, 100 insertions, 0 deletions
diff --git a/src/android_je_mallinfo.c b/src/android_je_mallinfo.c
new file mode 100644
index 0000000..1637edd
--- /dev/null
+++ b/src/android_je_mallinfo.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2014 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.
+ */
+
+/* This is an implementation that uses the same arena access pattern found
+ * in the arena_stats_merge function from src/arena.c.
+ */
+struct mallinfo je_mallinfo() {
+  struct mallinfo mi;
+  memset(&mi, 0, sizeof(mi));
+
+  malloc_mutex_lock(&arenas_lock);
+  for (unsigned i = 0; i < narenas_auto; i++) {
+    if (arenas[i] != NULL) {
+      malloc_mutex_lock(&arenas[i]->lock);
+      mi.hblkhd += arenas[i]->stats.mapped;
+      mi.uordblks += arenas[i]->stats.allocated_large;
+      mi.uordblks += arenas[i]->stats.allocated_huge;
+      malloc_mutex_unlock(&arenas[i]->lock);
+
+      for (unsigned j = 0; j < NBINS; j++) {
+        arena_bin_t* bin = &arenas[i]->bins[j];
+
+        malloc_mutex_lock(&bin->lock);
+        mi.uordblks += arena_bin_info[j].reg_size * bin->stats.curregs;
+        malloc_mutex_unlock(&bin->lock);
+      }
+    }
+  }
+  malloc_mutex_unlock(&arenas_lock);
+  mi.fordblks = mi.hblkhd - mi.uordblks;
+  mi.usmblks = mi.hblkhd;
+  return mi;
+}
+
+size_t __mallinfo_narenas() {
+  return narenas_auto;
+}
+
+size_t __mallinfo_nbins() {
+  return NBINS;
+}
+
+struct mallinfo __mallinfo_arena_info(size_t aidx) {
+  struct mallinfo mi;
+  memset(&mi, 0, sizeof(mi));
+
+  malloc_mutex_lock(&arenas_lock);
+  if (aidx < narenas_auto) {
+    if (arenas[aidx] != NULL) {
+      malloc_mutex_lock(&arenas[aidx]->lock);
+      mi.hblkhd = arenas[aidx]->stats.mapped;
+      mi.ordblks = arenas[aidx]->stats.allocated_large;
+      mi.uordblks = arenas[aidx]->stats.allocated_huge;
+      malloc_mutex_unlock(&arenas[aidx]->lock);
+
+      for (unsigned j = 0; j < NBINS; j++) {
+        arena_bin_t* bin = &arenas[aidx]->bins[j];
+
+        malloc_mutex_lock(&bin->lock);
+        mi.fsmblks += arena_bin_info[j].reg_size * bin->stats.curregs;
+        malloc_mutex_unlock(&bin->lock);
+      }
+    }
+  }
+  malloc_mutex_unlock(&arenas_lock);
+  return mi;
+}
+
+struct mallinfo __mallinfo_bin_info(size_t aidx, size_t bidx) {
+  struct mallinfo mi;
+  memset(&mi, 0, sizeof(mi));
+
+  malloc_mutex_lock(&arenas_lock);
+  if (aidx < narenas_auto && bidx < NBINS) {
+    if (arenas[aidx] != NULL) {
+      arena_bin_t* bin = &arenas[aidx]->bins[bidx];
+
+      malloc_mutex_lock(&bin->lock);
+      mi.ordblks = arena_bin_info[bidx].reg_size * bin->stats.curregs;
+      mi.uordblks = bin->stats.nmalloc;
+      mi.fordblks = bin->stats.ndalloc;
+      malloc_mutex_unlock(&bin->lock);
+    }
+  }
+  malloc_mutex_unlock(&arenas_lock);
+  return mi;
+}