diff options
| -rwxr-xr-x | configure | 18 | ||||
| -rw-r--r-- | qemu-malloc.c | 19 |
2 files changed, 30 insertions, 7 deletions
@@ -256,6 +256,7 @@ blobs="yes" pkgversion="" check_utests="no" user_pie="no" +zero_malloc="" # OS specific if check_define __linux__ ; then @@ -1792,8 +1793,9 @@ fi # Consult white-list to determine whether to enable werror # by default. Only enable by default for git builds +z_version=`cut -f3 -d. $source_path/VERSION` + if test -z "$werror" ; then - z_version=`cut -f3 -d. $source_path/VERSION` if test "$z_version" = "50" -a \ "$linux" = "yes" ; then werror="yes" @@ -1802,6 +1804,16 @@ if test -z "$werror" ; then fi fi +# Disable zero malloc errors for official releases unless explicitly told to +# enable/disable +if test -z "$zero_malloc" ; then + if test "$z_version" = "50" ; then + zero_malloc="no" + else + zero_malloc="yes" + fi +fi + if test "$werror" = "yes" ; then QEMU_CFLAGS="-Werror $QEMU_CFLAGS" fi @@ -2109,6 +2121,10 @@ fi echo "CONFIG_UNAME_RELEASE=\"$uname_release\"" >> $config_host_mak +if test "$zero_malloc" = "yes" ; then + echo "CONFIG_ZERO_MALLOC=y" >> $config_host_mak +fi + # USB host support case "$usb" in linux) diff --git a/qemu-malloc.c b/qemu-malloc.c index 295d185..5d9e34d 100644 --- a/qemu-malloc.c +++ b/qemu-malloc.c @@ -42,22 +42,29 @@ void qemu_free(void *ptr) free(ptr); } +static int allow_zero_malloc(void) +{ +#if defined(CONFIG_ZERO_MALLOC) + return 1; +#else + return 0; +#endif +} + void *qemu_malloc(size_t size) { - if (!size) { + if (!size && !allow_zero_malloc()) { abort(); } - return oom_check(malloc(size)); + return oom_check(malloc(size ? size : 1)); } void *qemu_realloc(void *ptr, size_t size) { if (size) { return oom_check(realloc(ptr, size)); - } else { - if (ptr) { - return realloc(ptr, size); - } + } else if (allow_zero_malloc()) { + return oom_check(realloc(ptr, size ? size : 1)); } abort(); } |