Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH 9/9] tools, perf: Add asprintf replacement | Date | Mon, 12 May 2014 16:20:29 -0700 |
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From: Andi Kleen <ak@linux.intel.com>
asprintf corrupts memory on some older glibc versions. Provide a replacement. This fixes various segfaults with --branch-history on older Fedoras.
Signed-off-by: Andi Kleen <ak@linux.intel.com> --- tools/perf/Makefile.perf | 1 + tools/perf/util/asprintf.c | 28 ++++++++++++++++++++++++++++ 2 files changed, 29 insertions(+) create mode 100644 tools/perf/util/asprintf.c
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index 50d875d..7183179 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -373,6 +373,7 @@ LIB_OBJS += $(OUTPUT)util/vdso.o LIB_OBJS += $(OUTPUT)util/stat.o LIB_OBJS += $(OUTPUT)util/record.o LIB_OBJS += $(OUTPUT)util/srcline.o +LIB_OBJS += $(OUTPUT)util/asprintf.o LIB_OBJS += $(OUTPUT)util/data.o LIB_OBJS += $(OUTPUT)ui/setup.o diff --git a/tools/perf/util/asprintf.c b/tools/perf/util/asprintf.c new file mode 100644 index 0000000..9aafaca --- /dev/null +++ b/tools/perf/util/asprintf.c @@ -0,0 +1,28 @@ +/* Replacement for asprintf as it's buggy in older glibc versions */ +#include <stdio.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> + +int vasprintf(char **str, const char *fmt, va_list ap) +{ + char buf[1024]; + int len = vsnprintf(buf, sizeof buf, fmt, ap); + + *str = malloc(len + 1); + if (!*str) + return -1; + strcpy(*str, buf); + return len; +} + +int asprintf(char **str, const char *fmt, ...) +{ + va_list ap; + int ret; + + va_start(ap, fmt); + ret = vasprintf(str, fmt, ap); + va_end(ap); + return ret; +} -- 1.9.0
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