Create a bare bones host libbacktrace on mac.

This allows the libbacktrace library to compile for host on mac.

Bug: 12474939
Change-Id: I32cbcf996e6fe9057e5065ba21f89086343704a0

3 files changed, 34 insertions, 16 deletions

diff --git a/libbacktrace/Android.mk b/libbacktrace/Android.mk
index a6b9c2b..8995fc1 100644
--- a/libbacktrace/Android.mk
+++ b/libbacktrace/Android.mk
@@ -168,18 +168,15 @@ LOCAL_ADDITIONAL_DEPENDENCIES := \
 include $(BUILD_NATIVE_TEST)
 
 #----------------------------------------------------------------------------
-# Only linux-x86 host versions of libbacktrace supported.
+# Only x86 host versions of libbacktrace supported.
 #----------------------------------------------------------------------------
-ifeq ($(HOST_OS)-$(HOST_ARCH),linux-x86)
+ifeq ($(HOST_ARCH),x86)
 
 #----------------------------------------------------------------------------
 # The host libbacktrace library using libcorkscrew
 #----------------------------------------------------------------------------
 include $(CLEAR_VARS)
 
-LOCAL_SRC_FILES += \
-	$(common_src) \
-	Corkscrew.cpp \
 
 LOCAL_CFLAGS += \
 	$(common_cflags) \
@@ -187,31 +184,51 @@ LOCAL_CFLAGS += \
 LOCAL_CONLYFLAGS += \
 	$(common_conlyflags) \
 
-LOCAL_CPPFLAGS += \
-	$(common_cppflags) \
-
 LOCAL_C_INCLUDES := \
 	$(common_c_includes) \
-	system/core/libcorkscrew \
 
 LOCAL_SHARED_LIBRARIES := \
 	libgccdemangle \
 	liblog \
+
+LOCAL_MODULE := libbacktrace
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_ADDITIONAL_DEPENDENCIES := \
+	$(LOCAL_PATH)/Android.mk
+
+ifeq ($(HOST_OS),linux)
+LOCAL_SRC_FILES += \
+	$(common_src) \
+	Corkscrew.cpp \
+
+LOCAL_C_INCLUDES += \
+	system/core/libcorkscrew \
+
+LOCAL_SHARED_LIBRARIES := \
 	libcorkscrew \
 
+LOCAL_CPPFLAGS += \
+	$(common_cppflags) \
+
 LOCAL_LDLIBS += \
 	-ldl \
 	-lrt \
 
-LOCAL_MODULE := libbacktrace
-LOCAL_MODULE_TAGS := optional
+else
+LOCAL_SRC_FILES += \
+	map_info.c \
 
-LOCAL_ADDITIONAL_DEPENDENCIES := \
-	$(LOCAL_PATH)/Android.mk
+endif
 
 include $(BUILD_HOST_SHARED_LIBRARY)
 
 #----------------------------------------------------------------------------
+# The host test is only supported on linux.
+#----------------------------------------------------------------------------
+ifeq ($(HOST_OS),linux)
+
+#----------------------------------------------------------------------------
 # libbacktrace host test library, all optimizations turned off
 #----------------------------------------------------------------------------
 include $(CLEAR_VARS)
@@ -263,4 +280,6 @@ LOCAL_ADDITIONAL_DEPENDENCIES := \
 
 include $(BUILD_HOST_NATIVE_TEST)
 
-endif # HOST_OS-HOST_ARCH == linux-x86
+endif # HOST_OS == linux
+
+endif # HOST_ARCH == x86
diff --git a/libbacktrace/Backtrace.cpp b/libbacktrace/Backtrace.cpp
index fa85872..20667e0 100644
--- a/libbacktrace/Backtrace.cpp
+++ b/libbacktrace/Backtrace.cpp
@@ -87,7 +87,7 @@ std::string Backtrace::GetFunctionName(uintptr_t pc, uintptr_t* offset) {
   if (!func_name.empty()) {
 #if defined(__APPLE__)
     // Mac OS' __cxa_demangle demangles "f" as "float"; last tested on 10.7.
-    if (symbol_name[0] != '_') {
+    if (func_name[0] != '_') {
       return func_name;
     }
 #endif
diff --git a/libbacktrace/BacktraceThread.h b/libbacktrace/BacktraceThread.h
index bcb56c9..a4b6ecb 100644
--- a/libbacktrace/BacktraceThread.h
+++ b/libbacktrace/BacktraceThread.h
@@ -18,7 +18,6 @@
 #define _LIBBACKTRACE_BACKTRACE_THREAD_H
 
 #include <inttypes.h>
-#include <pthread.h>
 #include <sys/types.h>
 
 #include "Backtrace.h"