Rewrite libbacktrace to be all C++.
This includes removing the map_info.c source and replacing it with the
BacktraceMap class to handle all map related code.
Change all callers of libbacktrace map functionality.
Also modify the corkscrew thread code so that it doesn't need to build
the map twice (once in the corkscrew format and once in the libbacktrace
format).
Change-Id: I32865a39f83a3dd6f958fc03c2759ba47d12382e
diff --git a/include/backtrace/BacktraceMap.h b/include/backtrace/BacktraceMap.h
new file mode 100644
index 0000000..e5389c1
--- /dev/null
+++ b/include/backtrace/BacktraceMap.h
@@ -0,0 +1,72 @@
+/*
+ * 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.
+ */
+
+#ifndef _BACKTRACE_BACKTRACE_MAP_H
+#define _BACKTRACE_BACKTRACE_MAP_H
+
+#include <stdint.h>
+#include <sys/mman.h>
+
+#include <string>
+#include <vector>
+
+struct backtrace_map_t {
+ uintptr_t start;
+ uintptr_t end;
+ int flags;
+ std::string name;
+};
+
+class BacktraceMap {
+public:
+ BacktraceMap(pid_t pid);
+ virtual ~BacktraceMap();
+
+ // Get the map data structure for the given address.
+ const backtrace_map_t* Find(uintptr_t addr);
+
+ // The flags returned are the same flags as used by the mmap call.
+ // The values are PROT_*.
+ int GetFlags(uintptr_t pc) {
+ const backtrace_map_t* map = Find(pc);
+ if (map) {
+ return map->flags;
+ }
+ return PROT_NONE;
+ }
+
+ bool IsReadable(uintptr_t pc) { return GetFlags(pc) & PROT_READ; }
+ bool IsWritable(uintptr_t pc) { return GetFlags(pc) & PROT_WRITE; }
+ bool IsExecutable(uintptr_t pc) { return GetFlags(pc) & PROT_EXEC; }
+
+ typedef std::vector<backtrace_map_t>::iterator iterator;
+ iterator begin() { return maps_.begin(); }
+ iterator end() { return maps_.end(); }
+
+ typedef std::vector<backtrace_map_t>::const_iterator const_iterator;
+ const_iterator begin() const { return maps_.begin(); }
+ const_iterator end() const { return maps_.end(); }
+
+ virtual bool Build();
+
+protected:
+ virtual bool ParseLine(const char* line, backtrace_map_t* map);
+
+ std::vector<backtrace_map_t> maps_;
+ pid_t pid_;
+};
+
+#endif // _BACKTRACE_BACKTRACE_MAP_H