Merge ymer.(none):/usr/local/mysql/mysql-5.0-engines

into  ymer.(none):/usr/local/mysql/mysql-5.1-engines


sql/stacktrace.c:
  Auto merged
BUILD/compile-pentium-gcov:
  Manual merge.

BUILD/compile-pentium-gcov

@@ -26,8 +26,9 @@ export LDFLAGS="-fprofile-arcs -ftest-coverage"
 
 # The  -fprofile-arcs and -ftest-coverage options cause GCC to instrument the
 # code with profiling information used by gcov.
-# the -DDISABLE_TAO_ASM is needed to avoid build failures in Yassl.
-extra_flags="$pentium_cflags -fprofile-arcs -ftest-coverage -DDISABLE_TAO_ASM -DHAVE_MUTEX_THREAD_ONLY $debug_extra_flags $debug_cflags $max_cflags -DMYSQL_SERVER_SUFFIX=-gcov"
+# The -DDISABLE_TAO_ASM is needed to avoid build failures in Yassl.
+# The -DHAVE_gcov enables code to write out coverage info even when crashing.
+extra_flags="$pentium_cflags -fprofile-arcs -ftest-coverage -DDISABLE_TAO_ASM -DHAVE_MUTEX_THREAD_ONLY $debug_extra_flags $debug_cflags $max_cflags -DMYSQL_SERVER_SUFFIX=-gcov -DHAVE_gcov"
 extra_configs="$pentium_configs $debug_configs --disable-shared $static_link"
 extra_configs="$extra_configs $max_configs"
 c_warnings="$c_warnings $debug_extra_warnings"

sql/stacktrace.c

@@ -228,6 +228,15 @@ void write_core(int sig)
 void write_core(int sig)
 {
   signal(sig, SIG_DFL);
+#ifdef HAVE_gcov
+  /*
+    For GCOV build, crashing will prevent the writing of code coverage
+    information from this process, causing gcov output to be incomplete.
+    So we force the writing of coverage information here before terminating.
+  */
+  extern void __gcov_flush(void);
+  __gcov_flush();
+#endif
   pthread_kill(pthread_self(), sig);
 #if defined(P_MYID) && !defined(SCO)
   /* On Solaris, the above kill is not enough */