improved CallStack a bit

- added a ctor that updates and dumps the stack immediately
- added a "logtag" parameter to dump()

Change-Id: Ie51c256071d282591752243bdb4f68cf9ff8829d

3 files changed, 17 insertions, 12 deletions

diff --git a/include/utils/CallStack.h b/include/utils/CallStack.h
index 079e20c69..61dc832ea 100644
--- a/include/utils/CallStack.h
+++ b/include/utils/CallStack.h
@@ -35,6 +35,8 @@ public:
     };
 
     CallStack();
+    CallStack(const char* logtag, int32_t ignoreDepth=1,
+            int32_t maxDepth=MAX_DEPTH);
     CallStack(const CallStack& rhs);
     ~CallStack();
 
@@ -53,8 +55,8 @@ public:
 
     void update(int32_t ignoreDepth=1, int32_t maxDepth=MAX_DEPTH);
 
-    // Dump a stack trace to the log
-    void dump(const char* prefix = 0) const;
+    // Dump a stack trace to the log using the supplied logtag
+    void dump(const char* logtag, const char* prefix = 0) const;
 
     // Return a string (possibly very long) containing the complete stack trace
     String8 toString(const char* prefix = 0) const;
diff --git a/libs/utils/CallStack.cpp b/libs/utils/CallStack.cpp
index 66fabebc4..e60f5d8e7 100644
--- a/libs/utils/CallStack.cpp
+++ b/libs/utils/CallStack.cpp
@@ -30,6 +30,11 @@ CallStack::CallStack() :
         mCount(0) {
 }
 
+CallStack::CallStack(const char* logtag, int32_t ignoreDepth, int32_t maxDepth) {
+    this->update(ignoreDepth+1, maxDepth);
+    this->dump(logtag);
+}
+
 CallStack::CallStack(const CallStack& rhs) :
         mCount(rhs.mCount) {
     if (mCount) {
@@ -96,7 +101,7 @@ void CallStack::update(int32_t ignoreDepth, int32_t maxDepth) {
     mCount = count > 0 ? count : 0;
 }
 
-void CallStack::dump(const char* prefix) const {
+void CallStack::dump(const char* logtag, const char* prefix) const {
     backtrace_symbol_t symbols[mCount];
 
     get_backtrace_symbols(mStack, mCount, symbols);
@@ -104,7 +109,9 @@ void CallStack::dump(const char* prefix) const {
         char line[MAX_BACKTRACE_LINE_LENGTH];
         format_backtrace_line(i, &mStack[i], &symbols[i],
                 line, MAX_BACKTRACE_LINE_LENGTH);
-        ALOGD("%s%s", prefix, line);
+        ALOG(LOG_DEBUG, logtag, "%s%s",
+                prefix ? prefix : "",
+                line);
     }
     free_backtrace_symbols(symbols, mCount);
 }
diff --git a/libs/utils/RefBase.cpp b/libs/utils/RefBase.cpp
index 3d3a59595..e538f6868 100644
--- a/libs/utils/RefBase.cpp
+++ b/libs/utils/RefBase.cpp
@@ -110,7 +110,7 @@ public:
                 char inc = refs->ref >= 0 ? '+' : '-';
                 ALOGD("\t%c ID %p (ref %d):", inc, refs->id, refs->ref);
 #if DEBUG_REFS_CALLSTACK_ENABLED
-                refs->stack.dump();
+                refs->stack.dump(LOG_TAG);
 #endif
                 refs = refs->next;
             }
@@ -124,16 +124,14 @@ public:
                 char inc = refs->ref >= 0 ? '+' : '-';
                 ALOGD("\t%c ID %p (ref %d):", inc, refs->id, refs->ref);
 #if DEBUG_REFS_CALLSTACK_ENABLED
-                refs->stack.dump();
+                refs->stack.dump(LOG_TAG);
 #endif
                 refs = refs->next;
             }
         }
         if (dumpStack) {
             ALOGE("above errors at:");
-            CallStack stack;
-            stack.update();
-            stack.dump();
+            CallStack stack(LOG_TAG);
         }
     }
 
@@ -269,9 +267,7 @@ private:
                 ref = ref->next;
             }
 
-            CallStack stack;
-            stack.update();
-            stack.dump();
+            CallStack stack(LOG_TAG);
         }
     }