![Vegard Nossum](/assets/img/avatar_default.png)
This adds support for kcov to UML. There is a small problem where UML will randomly segfault during boot; this is because current_thread_info() occasionally returns an invalid (non-NULL) pointer and we try to dereference it in __sanitizer_cov_trace_pc(). I consider this a bug in UML itself and this patch merely exposes it. [v2: disable instrumentation in UML-specific code] Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com> Cc: Richard Weinberger <richard@nod.at> Cc: Thomas Meyer <thomas@m3y3r.de> Cc: user-mode-linux-devel <user-mode-linux-devel@lists.sourceforge.net> Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Richard Weinberger <richard@nod.at>
56 lines
1.6 KiB
Makefile
56 lines
1.6 KiB
Makefile
#
|
|
# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux,intel}.com)
|
|
# Licensed under the GPL
|
|
#
|
|
|
|
# Don't instrument UML-specific code; without this, we may crash when
|
|
# accessing the instrumentation buffer for the first time from the
|
|
# kernel.
|
|
KCOV_INSTRUMENT := n
|
|
|
|
CPPFLAGS_vmlinux.lds := -DSTART=$(LDS_START) \
|
|
-DELF_ARCH=$(LDS_ELF_ARCH) \
|
|
-DELF_FORMAT=$(LDS_ELF_FORMAT) \
|
|
$(LDS_EXTRA)
|
|
extra-y := vmlinux.lds
|
|
clean-files :=
|
|
|
|
obj-y = config.o exec.o exitcode.o irq.o ksyms.o mem.o \
|
|
physmem.o process.o ptrace.o reboot.o sigio.o \
|
|
signal.o syscall.o sysrq.o time.o tlb.o trap.o \
|
|
um_arch.o umid.o maccess.o kmsg_dump.o skas/
|
|
|
|
obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
|
|
obj-$(CONFIG_GPROF) += gprof_syms.o
|
|
obj-$(CONFIG_GCOV) += gmon_syms.o
|
|
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
|
|
obj-$(CONFIG_STACKTRACE) += stacktrace.o
|
|
|
|
USER_OBJS := config.o
|
|
|
|
include arch/um/scripts/Makefile.rules
|
|
|
|
targets := config.c config.tmp
|
|
|
|
# Be careful with the below Sed code - sed is pitfall-rich!
|
|
# We use sed to lower build requirements, for "embedded" builders for instance.
|
|
|
|
$(obj)/config.tmp: $(objtree)/.config FORCE
|
|
$(call if_changed,quote1)
|
|
|
|
quiet_cmd_quote1 = QUOTE $@
|
|
cmd_quote1 = sed -e 's/"/\\"/g' -e 's/^/"/' -e 's/$$/\\n",/' \
|
|
$< > $@
|
|
|
|
$(obj)/config.c: $(src)/config.c.in $(obj)/config.tmp FORCE
|
|
$(call if_changed,quote2)
|
|
|
|
quiet_cmd_quote2 = QUOTE $@
|
|
cmd_quote2 = sed -e '/CONFIG/{' \
|
|
-e 's/"CONFIG"//' \
|
|
-e 'r $(obj)/config.tmp' \
|
|
-e 'a \' \
|
|
-e '""' \
|
|
-e '}' \
|
|
$< > $@
|