commit 4a26eaf1f14eee98b40fe626138466f8b89854fa
author Yabin Cui <yabinc@google.com> Tue Dec 05 17:40:48 2017 -0800
committer Yabin Cui <yabinc@google.com> Wed Dec 06 11:27:06 2017 -0800
tree 65890f29b95700abde526d54014b88d2c1d20bbd
parent 6740b9697e76fa8144d958a9248eee5bf4749e0f

libBacktraceOffline: fix using debug frame with load bias.

Bug: http://b/69383534
Test: run backtrace_test.
Change-Id: I295d9dc8f3e5b628f179b2eaeac21fa93de130b0

libbacktrace/BacktraceOffline.cpp

diff --git a/libbacktrace/BacktraceOffline.cpp b/libbacktrace/BacktraceOffline.cpp
index 0a2f5a3..3041492 100644
--- a/libbacktrace/BacktraceOffline.cpp
+++ b/libbacktrace/BacktraceOffline.cpp
@@ -320,7 +320,7 @@
   }
   if (debug_frame->has_debug_frame || debug_frame->has_gnu_debugdata) {
     unw_dyn_info_t di;
-    unw_word_t segbase = map.start - map.offset;
+    unw_word_t segbase = map.start - debug_frame->min_vaddr;
     // TODO: http://b/32916571
     // TODO: Do it ourselves is more efficient than calling libunwind functions.
     int found = dwarf_find_debug_frame(0, &di, ip, segbase, filename.c_str(), map.start, map.end);