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glibc/nptl/nptl_lock_constants.pysym

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Add pretty printers for the NPTL lock types This patch adds pretty printers for the following NPTL types: - pthread_mutex_t - pthread_mutexattr_t - pthread_cond_t - pthread_condattr_t - pthread_rwlock_t - pthread_rwlockattr_t To load the pretty printers into your gdb session, do the following: python import sys sys.path.insert(0, '/path/to/glibc/build/nptl/pretty-printers') end source /path/to/glibc/source/pretty-printers/nptl-printers.py You can check which printers are registered and enabled by issuing the 'info pretty-printer' gdb command. Printers should trigger automatically when trying to print a variable of one of the types mentioned above. The printers are architecture-independent, and were tested on an AMD64 running Ubuntu 14.04 and an x86 VM running Fedora 24. In order to work, the printers need to know the values of various flags that are scattered throughout pthread.h and pthreadP.h as enums and #defines. Since replicating these constants in the printers file itself would create a maintenance burden, I wrote a script called gen-py-const.awk that Makerules uses to extract the constants. This script is pretty much the same as gen-as-const.awk, except it doesn't cast the constant values to 'long' and is thorougly documented. The constants need only to be enumerated in a .pysym file, which is then referenced by a Make variable called gen-py-const-headers. As for the install directory, I discussed this with Mike Frysinger and Siddhesh Poyarekar, and we agreed that it can be handled in a separate patch, and shouldn't block merging of this one. In addition, I've written a series of test cases for the pretty printers. Each lock type (mutex, condvar and rwlock) has two test programs, one for itself and other for its related 'attributes' object. Each test program in turn has a PExpect-based Python script that drives gdb and compares its output to the expected printer's. The tests run on the glibc host, which is assumed to have both gdb and PExpect; if either is absent the tests will fail with code 77 (UNSUPPORTED). For cross-testing you should use cross-test-ssh.sh as test-wrapper. I've tested the printers on both native builds and a cross build using a Beaglebone Black running Debian, with the build system's filesystem shared with the board through NFS. Finally, I've written a README that explains all this and more. * INSTALL: Regenerated. * Makeconfig: Add comments and whitespace to make the control flow clearer. (+link-printers-tests, +link-pie-printers-tests, CFLAGS-printers-tests, installed-rtld-LDFLAGS, built-rtld-LDFLAGS, link-libc-rpath, link-libc-tests-after-rpath-link, link-libc-printers-tests): New. (rtld-LDFLAGS, rtld-tests-LDFLAGS, link-libc-tests-rpath-link, link-libc-tests): Use the new variables as required. * Makerules ($(py-const)): New rule. generated: Add $(py-const). * README.pretty-printers: New file. * Rules (tests-printers-programs, tests-printers-out, py-env): New. (others): Depend on $(py-const). (tests): Depend on $(tests-printers-programs) or $(tests-printers-out), as required. Pass $(tests-printers) to merge-test-results.sh. * manual/install.texi: Add requirements for testing the pretty printers. * nptl/Makefile (gen-py-const-headers, pretty-printers, tests-printers, CFLAGS-test-mutexattr-printers.c CFLAGS-test-mutex-printers.c, CFLAGS-test-condattr-printers.c, CFLAGS-test-cond-printers.c, CFLAGS-test-rwlockattr-printers.c CFLAGS-test-rwlock-printers.c, tests-printers-libs): Define. * nptl/nptl-printers.py: New file. * nptl/nptl_lock_constants.pysym: Likewise. * nptl/test-cond-printers.c: Likewise. * nptl/test-cond-printers.py: Likewise. * nptl/test-condattr-printers.c: Likewise. * nptl/test-condattr-printers.py: Likewise. * nptl/test-mutex-printers.c: Likewise. * nptl/test-mutex-printers.py: Likewise. * nptl/test-mutexattr-printers.c: Likewise. * nptl/test-mutexattr-printers.py: Likewise. * nptl/test-rwlock-printers.c: Likewise. * nptl/test-rwlock-printers.py: Likewise. * nptl/test-rwlockattr-printers.c: Likewise. * nptl/test-rwlockattr-printers.py: Likewise. * scripts/gen-py-const.awk: Likewise. * scripts/test_printers_common.py: Likewise. * scripts/test_printers_exceptions.py: Likewise.
2016-12-08 21:29:02 +08:00
#include <pthreadP.h>
-- Mutex types
PTHREAD_MUTEX_KIND_MASK PTHREAD_MUTEX_KIND_MASK_NP
PTHREAD_MUTEX_NORMAL
PTHREAD_MUTEX_RECURSIVE PTHREAD_MUTEX_RECURSIVE_NP
PTHREAD_MUTEX_ERRORCHECK PTHREAD_MUTEX_ERRORCHECK_NP
PTHREAD_MUTEX_ADAPTIVE_NP
-- Mutex status
-- These are hardcoded all over the code; there are no enums/macros for them.
PTHREAD_MUTEX_DESTROYED -1
PTHREAD_MUTEX_UNLOCKED 0
PTHREAD_MUTEX_LOCKED_NO_WAITERS 1
-- For robust mutexes
PTHREAD_MUTEX_INCONSISTENT
PTHREAD_MUTEX_NOTRECOVERABLE
FUTEX_OWNER_DIED
-- For robust and PI mutexes
FUTEX_WAITERS
FUTEX_TID_MASK
-- Mutex attributes
PTHREAD_MUTEX_ROBUST_NORMAL_NP
PTHREAD_MUTEX_PRIO_INHERIT_NP
PTHREAD_MUTEX_PRIO_PROTECT_NP
PTHREAD_MUTEX_PSHARED_BIT
PTHREAD_MUTEX_PRIO_CEILING_SHIFT
PTHREAD_MUTEX_PRIO_CEILING_MASK
-- Mutex attribute flags
PTHREAD_MUTEXATTR_PROTOCOL_SHIFT
PTHREAD_MUTEXATTR_PROTOCOL_MASK
PTHREAD_MUTEXATTR_PRIO_CEILING_MASK
PTHREAD_MUTEXATTR_FLAG_ROBUST
PTHREAD_MUTEXATTR_FLAG_PSHARED
PTHREAD_MUTEXATTR_FLAG_BITS
PTHREAD_MUTEX_NO_ELISION_NP
-- Priority protocols
PTHREAD_PRIO_NONE
PTHREAD_PRIO_INHERIT
PTHREAD_PRIO_PROTECT
-- These values are hardcoded as well:
-- Value of __mutex for shared condvars.
PTHREAD_COND_SHARED (void *)~0l
-- Value of __total_seq for destroyed condvars.
PTHREAD_COND_DESTROYED -1ull
-- __nwaiters encodes the number of threads waiting on a condvar
-- and the clock ID.
-- __nwaiters >> COND_NWAITERS_SHIFT gives us the number of waiters.
COND_NWAITERS_SHIFT
-- Condvar clock IDs
CLOCK_REALTIME
CLOCK_MONOTONIC
CLOCK_PROCESS_CPUTIME_ID
CLOCK_THREAD_CPUTIME_ID
CLOCK_MONOTONIC_RAW
CLOCK_REALTIME_COARSE
CLOCK_MONOTONIC_COARSE
-- Rwlock attributes
PTHREAD_RWLOCK_PREFER_READER_NP
PTHREAD_RWLOCK_PREFER_WRITER_NP
PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP
-- 'Shared' attribute values
PTHREAD_PROCESS_PRIVATE
PTHREAD_PROCESS_SHARED
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