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890b7a4b33
On s390/s390x backtrace(buffer, size) returns the series of called functions until "makecontext_ret" and additional entries (up to "size") with "makecontext_ret". GDB-backtrace is also warning: "Backtrace stopped: previous frame identical to this frame (corrupt stack?)" To reproduce this scenario you have to setup a new context with makecontext() and activate it with setcontext(). See e.g. cf() function in testcase stdlib/tst-makecontext.c. Or see bug in libgo "Bug 66303 - runtime.Caller() returns infinitely deep stack frames on s390x " (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66303). This patch omits the cfi_startproc/cfi_endproc directives in ENTRY/END macro of __makecontext_ret. Thus no frame information is generated in .eh_frame and backtrace stops after __makecontext_ret. There is also no .eh_frame info for _start or thread_start functions. ChangeLog: [BZ #18508] * stdlib/Makefile ($(objpfx)tst-makecontext3): Depend on $(libdl). * stdlib/tst-makecontext.c (cf): Test if _Unwind_Backtrace is not called infinitely times. (backtrace_helper): New function. (trace_arg): New struct. (st1): Enlarge stack size. * sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S: (__makecontext_ret): Omit cfi_startproc and cfi_endproc. * sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S: Likewise.
169 lines
5.8 KiB
Makefile
169 lines
5.8 KiB
Makefile
# Copyright (C) 1991-2015 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Makefile for stdlib routines
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#
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subdir := stdlib
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include ../Makeconfig
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headers := stdlib.h bits/stdlib.h bits/stdlib-ldbl.h bits/stdlib-float.h \
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monetary.h bits/monetary-ldbl.h \
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inttypes.h stdint.h bits/wordsize.h \
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errno.h sys/errno.h bits/errno.h \
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ucontext.h sys/ucontext.h \
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alloca.h fmtmsg.h \
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bits/stdlib-bsearch.h
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routines := \
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atof atoi atol atoll \
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abort \
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bsearch qsort msort \
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getenv putenv setenv secure-getenv \
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exit on_exit atexit cxa_atexit cxa_finalize old_atexit \
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quick_exit at_quick_exit cxa_at_quick_exit cxa_thread_atexit_impl \
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abs labs llabs \
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div ldiv lldiv \
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mblen mbstowcs mbtowc wcstombs wctomb \
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random random_r rand rand_r \
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drand48 erand48 lrand48 nrand48 mrand48 jrand48 \
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srand48 seed48 lcong48 \
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drand48_r erand48_r lrand48_r nrand48_r mrand48_r jrand48_r \
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srand48_r seed48_r lcong48_r \
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drand48-iter \
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strtol strtoul strtoll strtoull \
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strtol_l strtoul_l strtoll_l strtoull_l \
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strtof strtod strtold \
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strtof_l strtod_l strtold_l \
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system canonicalize \
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a64l l64a \
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rpmatch strfmon strfmon_l getsubopt xpg_basename fmtmsg \
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strtoimax strtoumax wcstoimax wcstoumax \
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getcontext setcontext makecontext swapcontext
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aux = grouping groupingwc tens_in_limb
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# These routines will be omitted from the libc shared object.
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# Instead the static object files will be included in a special archive
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# linked against when the shared library will be used.
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static-only-routines = atexit at_quick_exit
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test-srcs := tst-fmtmsg
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tests := tst-strtol tst-strtod testmb testrand testsort testdiv \
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test-canon test-canon2 tst-strtoll tst-environ \
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tst-xpg-basename tst-random tst-random2 tst-bsearch \
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tst-limits tst-rand48 bug-strtod tst-setcontext \
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tst-setcontext2 test-a64l tst-qsort tst-system testmb2 \
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bug-strtod2 tst-atof1 tst-atof2 tst-strtod2 tst-strtod3 \
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tst-rand48-2 tst-makecontext tst-strtod4 tst-strtod5 \
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tst-qsort2 tst-makecontext2 tst-strtod6 tst-unsetenv1 \
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tst-makecontext3 bug-getcontext bug-fmtmsg1 \
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tst-secure-getenv tst-strtod-overflow tst-strtod-round \
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tst-tininess tst-strtod-underflow tst-tls-atexit \
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tst-setcontext3
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tests-static := tst-secure-getenv
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modules-names = tst-tls-atexit-lib
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ifeq ($(build-shared),yes)
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tests += tst-putenv
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endif
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# Several mpn functions from GNU MP are used by the strtod function.
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mpn-routines := inlines add_n addmul_1 cmp divmod_1 divrem udiv_qrnnd \
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lshift rshift mod_1 mul mul_1 mul_n sub_n submul_1
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mpn-headers = longlong.h gmp.h gmp-impl.h gmp-mparam.h asm-syntax.h
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routines := $(strip $(routines) $(mpn-routines)) \
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dbl2mpn ldbl2mpn \
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mpn2flt mpn2dbl mpn2ldbl
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aux += fpioconst mp_clz_tab
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tests-extras += tst-putenvmod
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extra-test-objs += tst-putenvmod.os
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generated += isomac isomac.out tst-putenvmod.so
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CFLAGS-bsearch.c = $(uses-callbacks)
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CFLAGS-msort.c = $(uses-callbacks)
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CFLAGS-qsort.c = $(uses-callbacks)
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CFLAGS-system.c = -fexceptions
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CFLAGS-system.os = -fomit-frame-pointer
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CFLAGS-fmtmsg.c = -fexceptions
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CFLAGS-strfmon.c = $(libio-mtsafe)
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CFLAGS-strfmon_l.c = $(libio-mtsafe)
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CFLAGS-tst-bsearch.c = $(stack-align-test-flags)
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CFLAGS-tst-qsort.c = $(stack-align-test-flags)
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CFLAGS-tst-makecontext2.c = $(stack-align-test-flags)
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# Run a test on the header files we use.
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tests-special += $(objpfx)isomac.out
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ifeq ($(run-built-tests),yes)
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tests-special += $(objpfx)tst-fmtmsg.out
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endif
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include ../Rules
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# Testdir has to be named stdlib and needs to be writable
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test-canon-ARGS = --test-dir=${common-objpfx}stdlib
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bug-fmtmsg1-ENV = SEV_LEVEL=foo,11,newsev
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$(objpfx)isomac.out: $(objpfx)isomac
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$(dir $<)$(notdir $<) '$(CC)' \
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'-I../include $(+sysdep-includes) $(sysincludes) -I..' > $<.out; \
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$(evaluate-test)
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isomac-CFLAGS = -O
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$(objpfx)isomac: isomac.c
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$(native-compile)
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$(objpfx)tst-fmtmsg.out: tst-fmtmsg.sh $(objpfx)tst-fmtmsg
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$(SHELL) $< $(common-objpfx) '$(test-program-prefix-before-env)' \
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'$(run-program-env)' '$(test-program-prefix-after-env)' \
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$(common-objpfx)stdlib/; \
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$(evaluate-test)
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$(objpfx)tst-putenv: $(objpfx)tst-putenvmod.so
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LDFLAGS-tst-putenv = $(no-as-needed)
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$(objpfx)tst-putenvmod.so: $(objpfx)tst-putenvmod.os $(link-libc-deps)
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$(build-module)
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libof-tst-putenvmod = extramodules
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$(objpfx)bug-getcontext: $(libm)
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$(objpfx)tst-strtod-round: $(libm)
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$(objpfx)tst-tininess: $(libm)
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$(objpfx)tst-strtod-underflow: $(libm)
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$(objpfx)tst-strtod6: $(libm)
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tst-tls-atexit-lib.so-no-z-defs = yes
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$(objpfx)tst-tls-atexit: $(shared-thread-library) $(libdl)
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$(objpfx)tst-tls-atexit.out: $(objpfx)tst-tls-atexit-lib.so
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$(objpfx)tst-setcontext3.out: tst-setcontext3.sh $(objpfx)tst-setcontext3
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$(SHELL) $< $(common-objpfx) '$(test-program-prefix-before-env)' \
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'$(run-program-env)' '$(test-program-prefix-after-env)' \
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$(common-objpfx)stdlib/; \
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$(evaluate-test)
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$(objpfx)tst-makecontext: $(libdl)
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