tcmalloc: chromium port

Ported chromium port of gperftool. The port has all necessary changes for
android platform.
Details can be tracked at
https://chromium.googlesource.com/chromium/src/third_party/tcmalloc/chromium/

e.g.
- atomic operations for linux
- property based configurations porting using system property for Android
case (reading environment variables at startup)
- change in config.h as per Android platform
- c++11 fixes
- Fixed gcc errors/warnings
- logging changes as per android log libarary
- time calculation and abort call to tcmalloc (For linux)

1 files changed, 3 insertions, 27 deletions

diff --git a/src/stacktrace_libunwind-inl.h b/src/stacktrace_libunwind-inl.h
index 6f361ec..82b0cfe 100644
--- a/src/stacktrace_libunwind-inl.h
+++ b/src/stacktrace_libunwind-inl.h
@@ -1,4 +1,3 @@
-// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
 // Copyright (c) 2005, Google Inc.
 // All rights reserved.
 //
@@ -47,8 +46,6 @@ extern "C" {
 #include <libunwind.h>
 }
 #include "gperftools/stacktrace.h"
-
-#include "base/basictypes.h"
 #include "base/logging.h"
 
 // Sometimes, we can try to get a stack trace from within a stack
@@ -58,11 +55,7 @@ extern "C" {
 // recursive request, we'd end up with infinite recursion or deadlock.
 // Luckily, it's safe to ignore those subsequent traces.  In such
 // cases, we return 0 to indicate the situation.
-static __thread int recursive ATTR_INITIAL_EXEC;
-
-#if defined(TCMALLOC_ENABLE_UNWIND_FROM_UCONTEXT) && (defined(__i386__) || defined(__x86_64__)) && defined(__GNU_LIBRARY__)
-#define BASE_STACKTRACE_UNW_CONTEXT_IS_UCONTEXT 1
-#endif
+static __thread int recursive;
 
 #endif  // BASE_STACKTRACE_LIBINWIND_INL_H_
 
@@ -80,7 +73,7 @@ static __thread int recursive ATTR_INITIAL_EXEC;
 //   int max_depth: the size of the result (and sizes) array(s)
 //   int skip_count: how many stack pointers to skip before storing in result
 //   void* ucp: a ucontext_t* (GetStack{Trace,Frames}WithContext only)
-static int GET_STACK_TRACE_OR_FRAMES {
+int GET_STACK_TRACE_OR_FRAMES {
   void *ip;
   int n = 0;
   unw_cursor_t cursor;
@@ -94,27 +87,10 @@ static int GET_STACK_TRACE_OR_FRAMES {
   }
   ++recursive;
 
-#if (IS_WITH_CONTEXT && defined(BASE_STACKTRACE_UNW_CONTEXT_IS_UCONTEXT))
-  if (ucp) {
-    uc = *(static_cast<unw_context_t *>(const_cast<void *>(ucp)));
-    /* this is a bit weird. profiler.cc calls us with signal's ucontext
-     * yet passing us 2 as skip_count and essentially assuming we won't
-     * use ucontext. */
-    /* In order to fix that I'm going to assume that if ucp is
-     * non-null we're asked to ignore skip_count in case we're
-     * able to use ucp */
-    skip_count = 0;
-  } else {
-    unw_getcontext(&uc);
-    skip_count += 2;         // Do not include current and parent frame
-  }
-#else
   unw_getcontext(&uc);
-  skip_count += 2;         // Do not include current and parent frame
-#endif
-
   int ret = unw_init_local(&cursor, &uc);
   assert(ret >= 0);
+  skip_count++;         // Do not include current frame
 
   while (skip_count--) {
     if (unw_step(&cursor) <= 0) {