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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-10-12 03:45:55 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-10-12 03:49:40 -0700 |
| commit | d165ca64980f90ccace088670652cc203d1b5411 (patch) | |
| tree | 1bedb28f69cccae6e1a7e5861536467495ab4d10 /gmon/Makefile | |
| parent | bc9620d040b7494f457ccb750c9797b47ed76ada (diff) | |
| download | glibc-d165ca64980f90ccace088670652cc203d1b5411.zip glibc-d165ca64980f90ccace088670652cc203d1b5411.tar.gz glibc-d165ca64980f90ccace088670652cc203d1b5411.tar.bz2 | |
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 <link.h>.
[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 <carlos@redhat.com>
Diffstat (limited to 'gmon/Makefile')
| -rw-r--r-- | gmon/Makefile | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gmon/Makefile b/gmon/Makefile index 79e29d1..2cd077d 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) |