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2014-01-01Update copyright notices with scripts/update-copyrightsAllan McRae8406-8405/+8413
2013-12-31NEWS: mention 16379 as fixedMike Frysinger1-1/+1
Reported-by: Joseph S. Myers <joseph@codesourcery.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-31tst-fanotify: check for linux/fanotify.h existenceMike Frysinger4-0/+69
We support older kernels that lack this header, so check for it before we try to use it. Reported-by: Adhemerval Zanella <azanella@linux.vnet.ibm.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-31Benchmark inputs for cos and sinSiddhesh Poyarekar3-12/+5303
Add a comprehensive number of inputs for all branches in sin and cos computation, excluding the fast paths. This also adds a number of inputs for the multiple precision slow paths.
2013-12-31benchmark inputs for atanSiddhesh Poyarekar2-5/+805
Add a more comprehensive set of inputs for the atan function. I have also fixed the name on the multiple precision fallback inputs (I couldn't find any new inputs there) to reflect the fact that the fallback is only 144bits and not 768bits as I had earlier mentioned.
2013-12-31benchmark inputs for tanh and atanhSiddhesh Poyarekar3-10/+403
2013-12-31benchmark inputs for asinh and acoshSiddhesh Poyarekar3-10/+603
Like sinh and cosh, this patch has benchmark inputs for asinh and acosh, generated using a random number generator and spread over significant branches, ignoring the fast return paths.
2013-12-31benchmark inputs for sinh and coshSiddhesh Poyarekar3-10/+703
Add a full set of inputs for sinh and cosh functions generated using a random number generator and spreading it over all branches in the function, ignoring the fast paths (i.e. immediate return for special values).
2013-12-31benchmark inputs for asin and acosSiddhesh Poyarekar3-14/+5245
Add a comprehensive set of inputs for asin and acos functions, including the multiple precision fallback path.
2013-12-30ia64: longjmp_chk: support signal stacks [BZ #16372]Mike Frysinger6-13/+83
The sp check has to be moved up to the start of the func since it now makes a system call and that'll clobber a lot of registers. URL: https://sourceware.org/bugzilla/show_bug.cgi?id=16372 Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-30ia64: setjmp/longjmp: stop saving/restoring fpsr [BZ #16379]Mike Frysinger4-12/+21
The new tst-setjmp-fp test has been failing on IA64 because the setjmp and longjmp helpers take care of saving/restoring the fpsr register. Per the C standards, this is incorrect, so disable that logic. URL: https://sourceware.org/bugzilla/show_bug.cgi?id=16379 Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-30Fix ChangeLogOndřej Bílka1-1/+2
2013-12-30Fix spelling in manual, as in bug 16376Ville Skytta17-25/+43
2013-12-30ia64: setjmp: use HIDDEN_JUMPTARGETMike Frysinger2-3/+12
Rather than opencode the __GI_xxx logic, use proper hidden helpers. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-29ia64: syscall: add some helpful documentationMike Frysinger2-0/+8
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-27Add Solvenian translations for glibc messages.Carlos O'Donell3-1/+7260
2013-12-27ignore gdb related filesMike Frysinger2-0/+8
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-27Fix typo in csloww()Allan McRae3-2/+8
An incorrect variable name was used during the refactoring done in commit 4aafb73c.
2013-12-26Add lang_name to various locales.Chris Leonard12-2/+38
2013-12-25ia64: implement futex requeue pi supportMike Frysinger2-0/+34
Used the s390 code as a guideline until all tests pass. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-25ia64: add lll_futex_timed_wait_bitsetMike Frysinger2-0/+16
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-24ia64: ioperm: clean up long dead codeMike Frysinger2-19/+8
This file has a few #if 0 code paths which cause a build time warning: ports/sysdeps/unix/sysv/linux/ia64/ioperm.c:66:7: warning: variable 'prot' set but not used [-Wunused-but-set-variable] Rather than add more #if 0 around that variable, just delete the code altogether. Not like it's going to ever be implemented. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-24ia64: implement sotruss supportMike Frysinger2-0/+54
Tested with: $ cat test.c main(){close(0x1024, 2, 3);} $ gcc test.c $ sotruss -e ./a.out a.out -> libc.so.6.1 : __libc_start_main(0x4000000000000950, 0x1, 0x60000fffffb56bc8) a.out -> libc.so.6.1 : close(0x1024, 0x2, 0x3) a.out -> libc.so.6.1 : close - 0xffffffffffffffff Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-24ia64: link.h: adjust whitespaceMike Frysinger2-10/+14
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-12-23Define __CORRECT_ISO_CPP_STRING_H_PROTO correctly for Clang.Brooks Moses3-4/+19
In the string/string.h and string/strings.h headers, we have a couple of macros that "tell the caller that we provide correct C++ prototypes" according to the comment; they are used to determine whether to wrap some prototypes in "extern "C++"" (and provide multiple overloads of them, and some other magic) when __cplusplus is defined. The macros are set to check for sufficiently-recent GCC versions (4.4 and later), but this is not the right check for non-GCC compilers. In particular, these macros should also be set when using Clang -- if they are not set, then Clang will be unable to correctly diagnose a number of subtle bugs that will be errors in GCC compilations. As per discussion on earlier versions of this patch, rather than restrict the fix to Clang per se, we assume that all C++ compilers that claim to fully support C++98 are using a standard-conforming C++ standard library, which seems pretty reasonable. Clang has been providing an appropriate value of __cplusplus since May 2012.
2013-12-24Restore accidentally deleted bug-fix entries in NEWS.Maxim Kuvyrkov2-1/+6
* NEWS: Restore accidentally deleted bug-fix entries.
2013-12-24Fix race in free() of fastbin chunk: BZ #15073Maxim Kuvyrkov3-19/+30
Perform sanity check only if we have_lock. Due to lockless nature of fastbins we need to be careful derefencing pointers to fastbin entries (chunksize(old) in this case) in multithreaded environments. The fix is to add have_lock to the if-condition checks. The rest of the patch only makes code more readable. * malloc/malloc.c (_int_free): Perform sanity check only if we have_lock.
2013-12-23Add Changelog and news entry.Ondřej Bílka2-13/+19
2013-12-23Clarify that scanf does not use character classes. Fixes bug 12986Ondřej Bílka1-1/+5
Update documentation to say that scanf ("%[[:alpha:]]", c) does not read alphabetic characters but is parsed literarily.
2013-12-23Update powerpc-fpu ULPs.Adhemerval Zanella2-73/+4079
2013-12-22Fix ldbl-128 lgammal for small negative arguments (bug 16337).Joseph Myers3-3/+8
This patch fixes bug 16337, ldbl-128 lgammal spurious overflows for small negative arguments (the arguments in question are already in the testsuite). The implementation uses the reflection formula to compute lgamma of negative x from lgamma of -x, effectively resulting in a calculation -log(x^2) + log(-x); cancellation isn't problematic in this case (bugs for problematic cancellation in lgamma are 2542, 2543, 2558), but the x^2 calculation can underflow (in which case there is spurious logic to return an overflowing value - lgamma can only ever correctly overflow for large positive arguments, though tgamma can overflow for small arguments of either sign as well as large positive arguments). The fix is simply to calculate the result directly with logl when the argument is a small enough negative number. Tested mips64. * sysdeps/ieee754/ldbl-128/e_lgammal_r.c (__ieee754_lgammal_r): Calculate results for small negative arguments directly rather than using reflection formula with special underflow handling.
2013-12-22Flatten sysdeps/unix/bsd/bsd4.4 into sysdeps/unix/bsd.Joseph Myers18-14/+52
As discussed in <https://sourceware.org/ml/libc-alpha/2012-04/msg00840.html> and <https://sourceware.org/ml/libc-alpha/2012-04/msg00989.html>, it seems appropriate to flatten sysdeps/unix/bsd/bsd4.4 into sysdeps/unix/bsd. The bulk of the patch is just moving files. The only other changes are: update paths in sysdeps/mach/hurd/Implies and sysdeps/unix/sysv/linux/wait3.c; merge the two syscalls.list files, with the removal of syscalls that were in sysdeps/unix/bsd/syscalls.list but overridden in the bsd4.4 directory by .c files there. Tested x86_64. The installed shared libraries are identical before and after the patch except for libc.so where the move of wait3.c (included by sysdeps/unix/sysv/linux/wait3.c) affects debug info, but the disassembly is unchanged. * sysdeps/mach/hurd/Implies: Change unix/bsd/bsd4.4 to unix/bsd. * sysdeps/unix/bsd/syscalls.list (chflags): Add entry from sysdeps/unix/bsd/bsd4.4/syscalls.list. (fchflags): Likewise. (revoke): Likewise. (setlogin): Likewise. (sigaltstack): Likewise. (wait4): Likewise. (sigblock): Remove. (sigsetmask): Likewise. (wait3): Likewise. (waitpid): Likewise. * sysdeps/unix/bsd/bsd4.4/syscalls.list: Remove file. * sysdeps/unix/sysv/linux/wait3.c: Update directory of included file. * sysdeps/unix/bsd/bsd4.4/Makefile: Move to ... * sysdeps/unix/bsd/Makefile: ... here. * sysdeps/unix/bsd/bsd4.4/Versions: Move to ... * sysdeps/unix/bsd/Versions: ... here. * sysdeps/unix/bsd/bsd4.4/bits/sockaddr.h: Move to ... * sysdeps/unix/bsd/bits/sockaddr.h: ... here. * sysdeps/unix/bsd/bsd4.4/cmsg_nxthdr.c: Move to ... * sysdeps/unix/bsd/cmsg_nxthdr.c: ... here. * sysdeps/unix/bsd/bsd4.4/sigblock.c: Move to ... * sysdeps/unix/bsd/sigblock.c: ... here. * sysdeps/unix/bsd/bsd4.4/sigsetmask.c: Move to ... * sysdeps/unix/bsd/sigsetmask.c: ... here. * sysdeps/unix/bsd/bsd4.4/sigvec.c: Move to ... * sysdeps/unix/bsd/sigvec.c: ... here. * sysdeps/unix/bsd/bsd4.4/tcdrain.c: Move to ... * sysdeps/unix/bsd/tcdrain.c: ... here. * sysdeps/unix/bsd/bsd4.4/tcgetattr.c: Move to ... * sysdeps/unix/bsd/tcgetattr.c: ... here. * sysdeps/unix/bsd/bsd4.4/tcsetattr.c: Move to ... * sysdeps/unix/bsd/tcsetattr.c: ... here. * sysdeps/unix/bsd/bsd4.4/wait.c: Move to ... * sysdeps/unix/bsd/wait.c: ... here. * sysdeps/unix/bsd/bsd4.4/wait3.c: Move to ... * sysdeps/unix/bsd/wait3.c: ... here. * sysdeps/unix/bsd/bsd4.4/waitpid.c: Move to ... * sysdeps/unix/bsd/waitpid.c: ... here.
2013-12-21Fix x86 / x86_64 expl / expl10l wild results in directed rounding modes (bug ↵Joseph Myers9-550/+1059
16356). This patch fixes bug 16356, bad results from x86 / x86_64 expl / exp10l in directed rounding modes, the most serious of the bugs shown up by my patch expanding libm test coverage. When I fixed bug 16293, I thought it was only necessary to set round-to-nearest when using frndint in expm1 functions, because in other cases the cancellation error from having the resulting fractional part close to 1 or -1 would not be significant. However, in expl and exp10l, the way the final fractional part gets computed (something more complicated than a simple subtraction, because more precision is needed than you'd get that way) can result in a value outside the range [-1, 1] when the argument to frndint was very close to an integer and was rounded the "wrong" way because of the rounding mode - and the f2xm1 instruction has undefined results if its argument is outside [-1, 1], so resulting in the large errors seen. So this patch removes the USE_AS_EXPM1L conditionals on the round-to-nearest settings, so all of expl, expm1l and exp10l now get round-to-nearest used for frndint (meaning the final fractional part can at most be slightly above 0.5 in magnitude). Associated tests of exp and exp10 are added and testing of exp10 in directed rounding modes enabled. Tested x86_64 and x86 and ulps updated accordingly. * sysdeps/i386/fpu/e_expl.S (IEEE754_EXPL): Also set round-to-nearest for [!USE_AS_EXPM1L]. * sysdeps/x86_64/fpu/e_expl.S (IEEE754_EXPL): Likewise. * math/auto-libm-test-in: Do not expect cosh tests to fail. Add more tests of exp and exp10. Expect some exp10 tests to miss exceptions or fail in directed rounding modes. * math/auto-libm-test-out: Regenerated. * math/libm-test.inc (exp10_tonearest_test_data): New array. (exp10_test_tonearest): New function. (exp10_towardzero_test_data): New array. (exp10_test_towardzero): New function. (exp10_downward_test_data): New array. (exp10_test_downward): New function. (exp10_upward_test_data): New array. (exp10_test_upward): New function. (main): Call the new functions. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
2013-12-20Add more libm-test coverage of [a-c]* real functions.Joseph Myers6-11/+13700
Various libm functions have inadequate test coverage in libm-test.inc / auto-libm-test-in - failing to cover all the usual special cases (infinities, NaNs, zero, large and small finite values, subnormals) as well as a reasonable range of ordinary inputs and, where appropriate, inputs close to the thresholds for underflow and overflow. This patch improves test coverage for real functions [a-c]* (with the expectation of adding more coverage for other functions later). Tested x86_64 and x86 and ulps updated accordingly (and eight glibc bugs and one C11 DR filed for issues found in the process). * math/auto-libm-test-in: Add more tests of acos, acosh, asin, asinh, atan, atan2, atanh, cbrt, cos and cosh. * math/auto-libm-test-out: Regenerated. * math/libm-test.inc (acosh_test_data): Add more tests. (atanh_test_data): Likewise. (ceil_test_data): Likewise. (copysign_test_data): Likewise. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
2013-12-20fix localedata/ChangeLogChris Leonard1-6/+18
2013-12-20Revert spurious copying of ChangeLog to localedata/ChangeLog.Joseph Myers1-36672/+6447
2013-12-20Add lang_name to various locales.Chris Leonard11-6448/+36691
2013-12-20Update timezone code from tzcode 2013i.Joseph Myers8-480/+1072
Now we have Paul's support for version-3 tz files checked in, this patch updates all the code we take (unmodified) from tzcode to version 2013i (which includes the support for generating version-3 tz files where necessary). Tested x86_64. * timezone/checktab.awk: Update from tzcode 2013i. * timezone/private.h: Likewise. * timezone/scheck.c: Likewise. * timezone/tzfile.h: Likewise. * timezone/tzselect.ksh: Likewise. * timezone/zdump.c: Likewise. * timezone/zic.c: Likewise.
2013-12-20Move tests of cpow from libm-test.inc to auto-libm-test-in.Joseph Myers7-22/+1372
This patch moves tests of cpow to auto-libm-test-in, adding the required support to gen-auto-libm-tests. Tested x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add tests of cpow. * math/auto-libm-test-out: Regenerated. * math/libm-test.inc (cpow_test_data): Use AUTO_TESTS_cc_c. * * math/gen-auto-libm-tests.c (func_calc_method): Add value mpc_cc_c. (func_calc_desc): Add mpc_cc_c union field. (test_functions): Add cpow. (special_fill_2pi): New function. (special_real_inputs): Add 2pi. (calc_generic_results): Handle mpc_cc_c. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
2013-12-20Move various TEST_c_c tests from libm-test.inc to auto-libm-test-inc.Joseph Myers7-594/+46005
This patch moves tests of ccos, ccosh, cexp, clog, csqrt, ctan and ctanh to auto-libm-test-in, adding the required support to gen-auto-libm-tests. Other TEST_c_c functions aren't moved for now (although the relevant table entries are put in gen-auto-libm-tests for it to know how to handle them): clog10 because of a known MPC bug causing it to hang for at least some pure imaginary inputs (fixed in SVN, but I'd rather not rely on unreleased versions of MPFR or MPC even if relying on very recent releases); the inverse trig and hyperbolic functions because of known slowness in special cases; and csin / csinh because of observed slowness that I need to investigate and report to the MPC maintainers. Slowness can be bypassed by moving to incremental generation (only for new / changed tests) rather than regenerating the whole of auto-libm-test-out every time, but that needs implementing. (This patch takes the time for running gen-auto-libm-tests from about one second to seven, on my system, which I think is reasonable. The slow functions would make it take several minutes at least, which seems unreasonable.) Tested x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add tests of ccos, ccosh, cexp, clog, csqrt, ctan and ctanh. * math/auto-libm-test-out: Regenerated. * math/libm-test.inc (TEST_COND_x86_64): New macro. (TEST_COND_x86): Likewise. (ccos_test_data): Use AUTO_TESTS_c_c. (ccosh_test_data): Likewise. (cexp_test_data): Likewise. (clog_test_data): Likewise. (csqrt_test_data): Likewise. (ctan_test_data): Likewise. (ctan_tonearest_test_data): Likewise. (ctan_towardzero_test_data): Likewise. (ctan_downward_test_data): Likewise. (ctan_upward_test_data): Likewise. (ctanh_test_data): Likewise. (ctanh_tonearest_test_data): Likewise. (ctanh_towardzero_test_data): Likewise. (ctanh_downward_test_data): Likewise. (ctanh_upward_test_data): Likewise. * math/gen-auto-libm-tests.c (func_calc_method): Add value mpc_c_c. (func_calc_desc): Add mpc_c_c union field. (FUNC_mpc_c_c): New macro. (test_functions): Add cacos, cacosh, casin, casinh, catan, catanh, ccos, ccosh, cexp, clog, clog10, csin, csinh, csqrt, ctan and ctanh. (special_fill_min_subnorm_p120): New function. (special_real_inputs): Add min_subnorm_p120. (calc_generic_results): Handle mpc_c_c. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
2013-12-20Consolidate code to compute sin and cos from lookup tablesSiddhesh Poyarekar2-232/+134
This patch consolidates the multiple copies of code that looks up sin and cos of a number from the lookup table and computes the final value, into static functions. This does not have a noticeable performance impact since the functions are inlined by gcc. There is further scope for consolidation in the functions but they cause a more noticable impact on performance (>5%) due to which I have held back on them.
2013-12-20Remove more redundant computations in s_sin.cSiddhesh Poyarekar2-42/+40
Removed more redundant computations in the slow paths of the sin and cos functions. The notable change is the passing of the most significant bits of X to the slow functions to check if X is positive so that just the absolute value of x can be passed and the repeated ABS() operation is avoided.
2013-12-20Remove redundant arguments in reduce_and_computeSiddhesh Poyarekar2-4/+9
The A and DA arguments in reduce_and_compute are useless and hence have been removed.
2013-12-20Remove some redundant computations in s_sin.cSiddhesh Poyarekar2-24/+24
There are multiple points in the code where the absolute value of a number is computed multiple times or is computed even though the value can only be positive. This change removes those redundant computations. Tested on x86_64 to verify that there were no regressions in the testsuite.
2013-12-19Move tests of cabs and carg from libm-test.inc to auto-libm-test-in.Joseph Myers5-48/+676
This patch moves tests of cabs and carg to auto-libm-test-in, adding the required support to gen-auto-libm-tests. Tested x86_64 and x86; no ulps updates needed. * math/auto-libm-test-in: Add tests of cabs and carg. * math/auto-libm-test-out: Regenerated. * math/libm-test.inc (cabs_test_data): Use AUTO_TESTS_c_f. (carg_test_data): Likewise. * math/gen-auto-libm-tests.c (func_calc_method): Add value mpc_c_f. (func_calc_desc): Add mpc_c_f union field. (test_functions): Add cabs and carg. (calc_generic_results): Handle mpc_c_f.
2013-12-19Don't make soft-fp symbols compat symbols for powerpc-nofpu.Joseph Myers3-9/+43
sysdeps/powerpc/powerpc32/libgcc-compat.S makes certain symbols that glibc once accidentally reexported from libgcc into compat symbols. Where the exports were purely accidental, this is the right thing to do. However, for powerpc-nofpu the soft-fp symbols are deliberately exported from libc, given public versions in sysdeps/powerpc/nofpu/Versions and used by libm in preference to the libgcc versions that do not support the software exceptions and rounding modes. The libc versions should also be usable by user programs, though normally libgcc gets linked in first (meaning, effectively, that the <fenv.h> functions are broken as regards their expected effects on user arithmetic). A longstanding todo item is to remove the functions in question from libgcc (when built with recent enough glibc) - that is, remove them from static libgcc and make them compat symbols in shared libgcc - so that this works properly (this is one of the items mentioned at <http://gcc.gnu.org/wiki/Software_floating_point> - parts of that page are obviously out of date, but this item still applies). Doing this requires first that the functions are actually available from libc for new links, not just as compat symbols. This patch stops the symbols in question being compat symbols for powerpc-nofpu. The nofpu Versions entries for them are removed (the symbols never were exported at GLIBC_2.3.2, only GLIBC_2.0, because the compat symbols took precedence). Tested powerpc-nofpu. The symbols are no longer compat symbols and libm.so now properly gets undefined references to them (resolved to libc.so) instead of the libgcc copies getting linked into libm as before. * sysdeps/powerpc/powerpc32/libgcc-compat.S [_SOFT_FLOAT || __NO_FPRS__] (__fixdfdi_v_glibc20): Do not define as a macro and a compat symbol. [_SOFT_FLOAT || __NO_FPRS__] (__fixsfdi_v_glibc20): Likewise. [_SOFT_FLOAT || __NO_FPRS__] (__fixunsdfdi_v_glibc20): Likewise. [_SOFT_FLOAT || __NO_FPRS__] (__fixunssfdi_v_glibc20): Likewise. [_SOFT_FLOAT || __NO_FPRS__] (__floatdidf_v_glibc20): Likewise. [_SOFT_FLOAT || __NO_FPRS__] (__floaddisf_v_glibc20): Likewise. [HAVE_DOT_HIDDEN && (_SOFT_FLOAT || __NO_FPRS__)] (__fixdfdi): Do not use .hidden. [HAVE_DOT_HIDDEN && (_SOFT_FLOAT || __NO_FPRS__)] (__fixsfdi): Likewise. [HAVE_DOT_HIDDEN && (_SOFT_FLOAT || __NO_FPRS__)] (__fixunsdfdi): Likewise. [HAVE_DOT_HIDDEN && (_SOFT_FLOAT || __NO_FPRS__)] (__fixunssfdi): Likewise. [HAVE_DOT_HIDDEN && (_SOFT_FLOAT || __NO_FPRS__)] (__floaddidf): Likewise. [HAVE_DOT_HIDDEN && (_SOFT_FLOAT || __NO_FPRS__)] (__floaddisf): Likewise. * sysdeps/powerpc/nofpu/Versions (libc): Remove __fixdfdi, __fixsfdi, __fixunsdfdi, __fixunssfdi, __floatdidf and __floatdisf from GLIBC_2.3.2.
2013-12-19Update powerpc-fpu ULPs.Adhemerval Zanella2-0/+637
2013-12-19Fix white space as well.Paul Pluzhnikov1-1/+1
2013-12-19Fix incorrect power of 2 check in last commit.Paul Pluzhnikov1-1/+1
2013-12-19Cleanup compile warnings.Paul Pluzhnikov2-5/+21
2013-12-19 Paul Pluzhnikov <ppluzhnikov@google.com> * elf/dl-misc.c (ptr_to_signal_safe_allocator_header): New function. (__signal_safe_memalign, __signal_safe_free): Use it. (__signal_safe_realloc): Likewise.
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