Revert "SERVER-5852 use libunwind routines for backtrace on freebsd"

This reverts commit e6f9efc3c372f5bc8871df838c6e891117655a88.

This may be resubmitted as a generic replacement for backtrace()
on all platforms, rather than just FreeBSD.

1 files changed, 0 insertions, 47 deletions

diff --git a/src/mongo/util/stacktrace.cpp b/src/mongo/util/stacktrace.cpp
index 37aececd958..4e4687217d5 100644
--- a/src/mongo/util/stacktrace.cpp
+++ b/src/mongo/util/stacktrace.cpp
@@ -34,53 +34,6 @@ namespace mongo {
     }
 }
 
-#elif MONGO_HAVE_UNWIND_BACKTRACE
-
-// This makes libunwind only work for within the
-// current process, but that's what we want anyway.
-#define UNW_LOCAL_ONLY
-
-#include <libunwind.h>
-
-namespace mongo {
-    static const int maxBackTraceFrames = 20;
-
-    void printStackTrace( std::ostream &os ) {
-        unw_context_t stack;
-        unw_cursor_t cursor;
-
-        int status = unw_getcontext(&stack);
-        if (status != 0) {
-            os << "unw_getcontext failed: " << status << std::endl;
-            return;
-        }
-        status = unw_init_local(&cursor, &stack);
-        if (status != 0) {
-            os << "unw_init_local failed: " << status << std::endl;
-            return;
-        }
-        for ( int depth = 0; (depth < maxBackTraceFrames && unw_step(&cursor) != 0); ++depth ) {
-            unw_word_t  offset;
-            unw_word_t  pc;
-            char        fname[128];
-
-            status = unw_get_reg(&cursor, UNW_REG_IP,  &pc);
-            if (status != 0) {
-                os << "unw_get_reg failed: " << status << std::endl;
-                return;
-            }
-
-            fname[0] = '\0';
-            status = unw_get_proc_name(&cursor, fname, sizeof(fname), &offset);
-            if (status != 0) {
-                os << "unw_get_proc_name failed: " << status << std::endl;
-                return;
-            }
-            os << fname << "+0x" << offset << " [0x" << std::hex << pc << std::dec << "]" << std::endl;
-        }
-    }
-}
-
 #else
 
 namespace mongo {