From d165ca64980f90ccace088670652cc203d1b5411 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Thu, 12 Oct 2017 03:45:55 -0700 Subject: Support profiling PIE [BZ #22284] Since PIE can be loaded at any address, we need to subtract load address from PCs. [BZ #22284] * gmon/Makefile [$(have-fpie)$(build-shared) == yesyes] (tests, tests-pie): Add tst-gmon-pie. (CFLAGS-tst-gmon-pie.c): New. (CRT-tst-gmon-pie): Likewise. (tst-gmon-pie-ENV): Likewise. [$(have-fpie)$(build-shared) == yesyes] (tests-special): Likewise. ($(objpfx)tst-gmon-pie.out): Likewise. (clean-tst-gmon-pie-data): Likewise. ($(objpfx)tst-gmon-pie-gprof.out): Likewise. * gmon/gmon.c [PIC]: Include . [PIC] (callback): New function. (write_hist): Add an argument for load address. Subtract load address from PCs. (write_call_graph): Likewise. (write_gmon): Call __dl_iterate_phdr to get load address, pass it to write_hist and write_call_graph. Reviewed-by: Carlos O'Donell --- gmon/Makefile | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'gmon/Makefile') diff --git a/gmon/Makefile b/gmon/Makefile index 79e29d188f..2cd077dece 100644 --- a/gmon/Makefile +++ b/gmon/Makefile @@ -33,6 +33,11 @@ tests-static += tst-profile-static LDFLAGS-tst-profile-static = -profile endif +ifeq (yesyes,$(have-fpie)$(build-shared)) +tests += tst-gmon-pie +tests-pie += tst-gmon-pie +endif + # The mcount code won't work without a frame pointer. CFLAGS-mcount.c := -fno-omit-frame-pointer @@ -44,6 +49,14 @@ ifeq ($(run-built-tests),yes) tests-special += $(objpfx)tst-gmon-gprof.out endif +CFLAGS-tst-gmon-pie.c := $(PIE-ccflag) -fno-omit-frame-pointer -pg +CRT-tst-gmon-pie := $(csu-objpfx)gcrt1.o +tst-gmon-pie-ENV := GMON_OUT_PREFIX=$(objpfx)tst-gmon-pie.data +ifeq ($(run-built-tests),yes) +tests-special += $(objpfx)tst-gmon-pie-gprof.out +endif + + include ../Rules # We cannot compile mcount.c with -pg because that would @@ -69,3 +82,11 @@ clean-tst-gmon-data: $(objpfx)tst-gmon-gprof.out: tst-gmon-gprof.sh $(objpfx)tst-gmon.out $(SHELL) $< $(GPROF) $(objpfx)tst-gmon $(objpfx)tst-gmon.data.* > $@; \ $(evaluate-test) + +$(objpfx)tst-gmon-pie.out: clean-tst-gmon-pie-data +clean-tst-gmon-pie-data: + rm -f $(objpfx)tst-gmon-pie.data.* + +$(objpfx)tst-gmon-pie-gprof.out: tst-gmon-gprof.sh $(objpfx)tst-gmon-pie.out + $(SHELL) $< $(GPROF) $(objpfx)tst-gmon-pie $(objpfx)tst-gmon-pie.data.* > $@; \ + $(evaluate-test) -- cgit 1.4.1