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enable emergency malloc by default on arm when using libunwind

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Because by default libunwind on arm does fopen which mallocs which will
deadlock unless we enable emergency malloc.
This commit is contained in:
Aliaksey Kandratsenka 2016-02-21 13:52:47 -08:00
parent 7f12051dbe
commit 4f3410e759
1 changed files with 10 additions and 1 deletions
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11
configure.ac
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@ -266,6 +266,7 @@ if test "$enable_libunwind" = yes; then
AC_CHECK_LIB(unwind, backtrace, UNWIND_LIBS=-lunwind,
[AC_CHECK_LIB(execinfo, backtrace, UNWIND_LIBS=-lexecinfo, UNWIND_LIBS=)])
AC_SUBST(UNWIND_LIBS)
will_use_libunwind=yes
else
AC_CHECK_LIB(execinfo, backtrace, UNWIND_LIBS=-lexecinfo, UNWIND_LIBS=)
AC_SUBST(UNWIND_LIBS)
@ -390,11 +391,19 @@ AC_CACHE_CHECK([if target has _Unwind_Backtrace],
AS_IF([test "x$perftools_cv_have_unwind_backtrace" = xyes],
[AC_DEFINE(HAVE_UNWIND_BACKTRACE, 1, [Whether <unwind.h> contains _Unwind_Backtrace])])
AS_IF([test "x$enable_backtrace" = xyes],
[default_emergency_malloc=yes],
[default_emergency_malloc=no])
AS_IF([test "x$will_use_libunwind" = xyes],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [return __arm__])],
[default_emergency_malloc=yes])])
AC_ARG_ENABLE([emergency-malloc],
[AS_HELP_STRING([--enable-emergency-malloc],
[build emergency malloc feature])],
[enable_emergency_malloc="$enableval"],
[enable_emergency_malloc="$enable_backtrace"])
[enable_emergency_malloc="$default_emergency_malloc"])
AM_CONDITIONAL(BUILD_EMERGENCY_MALLOC, [test "x$enable_emergency_malloc" = xyes])