Initial Commit

1 files changed, 131 insertions, 0 deletions

diff --git a/absl/base/internal/malloc_hook_c.h b/absl/base/internal/malloc_hook_c.h
new file mode 100644
index 0000000000..03b84ca627
--- /dev/null
+++ b/absl/base/internal/malloc_hook_c.h
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2017 The Abseil Authors.
+ *
+ * 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.
+ */
+
+/*
+ * C shims for the C++ malloc_hook.h.  See malloc_hook.h for details
+ * on how to use these.
+ */
+#ifndef ABSL_BASE_INTERNAL_MALLOC_HOOK_C_H_
+#define ABSL_BASE_INTERNAL_MALLOC_HOOK_C_H_
+
+#include <stddef.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
+/* Get the current stack trace.  Try to skip all routines up to and
+ * including the caller of MallocHook::Invoke*.
+ * Use "skip_count" (similarly to absl::GetStackTrace from stacktrace.h)
+ * as a hint about how many routines to skip if better information
+ * is not available.
+ */
+typedef int (*MallocHook_GetStackTraceFn)(void**, int, int);
+int MallocHook_GetCallerStackTrace(void** result, int max_depth, int skip_count,
+                                   MallocHook_GetStackTraceFn fn);
+
+/* All the MallocHook_{Add,Remove}*Hook functions below return 1 on success
+ * and 0 on failure.
+ */
+
+typedef void (*MallocHook_NewHook)(const void* ptr, size_t size);
+int MallocHook_AddNewHook(MallocHook_NewHook hook);
+int MallocHook_RemoveNewHook(MallocHook_NewHook hook);
+
+typedef void (*MallocHook_DeleteHook)(const void* ptr);
+int MallocHook_AddDeleteHook(MallocHook_DeleteHook hook);
+int MallocHook_RemoveDeleteHook(MallocHook_DeleteHook hook);
+
+typedef int64_t MallocHook_AllocHandle;
+typedef struct {
+  /* See malloc_hook.h  for documentation for this struct. */
+  MallocHook_AllocHandle handle;
+  size_t allocated_size;
+  int stack_depth;
+  const void* stack;
+} MallocHook_SampledAlloc;
+typedef void (*MallocHook_SampledNewHook)(
+    const MallocHook_SampledAlloc* sampled_alloc);
+int MallocHook_AddSampledNewHook(MallocHook_SampledNewHook hook);
+int MallocHook_RemoveSampledNewHook(MallocHook_SampledNewHook hook);
+
+typedef void (*MallocHook_SampledDeleteHook)(MallocHook_AllocHandle handle);
+int MallocHook_AddSampledDeleteHook(MallocHook_SampledDeleteHook hook);
+int MallocHook_RemoveSampledDeleteHook(MallocHook_SampledDeleteHook hook);
+
+typedef void (*MallocHook_PreMmapHook)(const void *start,
+                                       size_t size,
+                                       int protection,
+                                       int flags,
+                                       int fd,
+                                       off_t offset);
+int MallocHook_AddPreMmapHook(MallocHook_PreMmapHook hook);
+int MallocHook_RemovePreMmapHook(MallocHook_PreMmapHook hook);
+
+typedef void (*MallocHook_MmapHook)(const void* result,
+                                    const void* start,
+                                    size_t size,
+                                    int protection,
+                                    int flags,
+                                    int fd,
+                                    off_t offset);
+int MallocHook_AddMmapHook(MallocHook_MmapHook hook);
+int MallocHook_RemoveMmapHook(MallocHook_MmapHook hook);
+
+typedef int (*MallocHook_MmapReplacement)(const void* start,
+                                          size_t size,
+                                          int protection,
+                                          int flags,
+                                          int fd,
+                                          off_t offset,
+                                          void** result);
+int MallocHook_SetMmapReplacement(MallocHook_MmapReplacement hook);
+int MallocHook_RemoveMmapReplacement(MallocHook_MmapReplacement hook);
+
+typedef void (*MallocHook_MunmapHook)(const void* start, size_t size);
+int MallocHook_AddMunmapHook(MallocHook_MunmapHook hook);
+int MallocHook_RemoveMunmapHook(MallocHook_MunmapHook hook);
+
+typedef int (*MallocHook_MunmapReplacement)(const void* start,
+                                            size_t size,
+                                            int* result);
+int MallocHook_SetMunmapReplacement(MallocHook_MunmapReplacement hook);
+int MallocHook_RemoveMunmapReplacement(MallocHook_MunmapReplacement hook);
+
+typedef void (*MallocHook_MremapHook)(const void* result,
+                                      const void* old_addr,
+                                      size_t old_size,
+                                      size_t new_size,
+                                      int flags,
+                                      const void* new_addr);
+int MallocHook_AddMremapHook(MallocHook_MremapHook hook);
+int MallocHook_RemoveMremapHook(MallocHook_MremapHook hook);
+
+typedef void (*MallocHook_PreSbrkHook)(ptrdiff_t increment);
+int MallocHook_AddPreSbrkHook(MallocHook_PreSbrkHook hook);
+int MallocHook_RemovePreSbrkHook(MallocHook_PreSbrkHook hook);
+
+typedef void (*MallocHook_SbrkHook)(const void* result, ptrdiff_t increment);
+int MallocHook_AddSbrkHook(MallocHook_SbrkHook hook);
+int MallocHook_RemoveSbrkHook(MallocHook_SbrkHook hook);
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif  /* __cplusplus */
+
+#endif  /* ABSL_BASE_INTERNAL_MALLOC_HOOK_C_H_ */