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* Switching the Cygwin DLL to LGPLv3+, dropping commercial buyout optioncygwin-2_5_2-releaseCorinna Vinschen2016-06-231-3/+0
| | | | | | | | | | | | | | Bump GPLv2+ to GPLv3+ for some files, clarify BSD 2-clause. Everything else stays under GPLv3+. New Linking Exception exempts resulting executables from LGPLv3 section 4. Add CONTRIBUTORS file to keep track of licensing. Remove 'Copyright Red Hat Inc' comments. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Throughout Cygwin, use u_intN_t or uintN_tCorinna Vinschen2016-03-241-2/+2
| | | | | | | | | | Don't use u_char, u_short, u_int or u_long in Cygwin, unless it refers to the Winsock types. Use u_intN_t in BSD-based sources, unsigned char where strings are concerned, uintN_t otherwise. Also: * net.cc: Fix comment, we're not using u_long anymore. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* cygwin: fix errors with GCC 5Yaakov Selkowitz2016-02-121-2/+2
| | | | | | | | | | | | | | | | | | GCC 5 switched from C89 to C11 by default. This implies a change from GNU to C99 inline by default, which have very different meanings of extern inline vs. static inline: https://gcc.gnu.org/onlinedocs/gcc/Inline.html Marking these as gnu_inline retains the previous behaviour. winsup/cygwin/ * exceptions.cc (exception::handle): Change debugging to int to fix an always-true boolean comparison warning. * include/cygwin/config.h (__getreent): Mark gnu_inline. * winbase.h (ilockcmpexch, ilockcmpexch64): Ditto. Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
* Fix race condition when waiting for a signalCorinna Vinschen2015-11-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | * cygtls.h (_cygtls::wait_signal_arrived): Renamed from set_signal_arrived. (_cygtls::set_signal_arrived): New function signalling signal_arrived. (_cygtls::reset_signal_arrived): Don't reset will_wait_for_signal. (_cygtls::unwait_signal_arrived): New function only resetting will_wait_for_signal. (class wait_signal_arrived): Rename from set_signal_arrived. Accommodate name change throughout Cygwin. (wait_signal_arrived::~wait_signal_arrived): Call _cygtls::unwait_signal_arrived. Add comment. * cygserver_ipc.h (ipc_set_proc_info): Fetch signal_arrived handle via call to _cygtls::get_signal_arrived. * exceptions.cc (_cygtls::interrupt_setup): Signal signal_arrived via call to _cygtls::set_signal_arrived. (_cygtls::handle_SIGCONT): Ditto. * fhandler_socket.cc (fhandler_socket::wait_for_events): Generate WSAEVENT array prior to entering wait loop. Add cancel event object if available. Remove calls to pthread_testcancel and just call pthread::static_cancel_self if the cancel event object is signalled. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Avoid double unlock of TLS mutexCorinna Vinschen2015-10-301-4/+1
| | | | | | | * exceptions.cc (sigpacket::process): Avoid potentially double unlocking the TLS mutex. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* exceptions.cc: Drop including ucontext.h.Corinna Vinschen2015-08-181-1/+0
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Fix potential buffer overflow in makecontext trampolineCorinna Vinschen2015-07-231-1/+7
| | | | | | | | | | | | | | glibc's tst-makecontext2 testcase uncovered a bug in __cont_link_context. If the function misses to reserve shadow space for the calls to setcontext/cygwin_exit, both functions could overwrite memory beyond the stack configured in uc_stack. * exceptions.cc (__cont_link_context): x86_64: align stack and reserve shadow space for subsequent function calls, otherwise suffer potential buffer overflow. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Reduce stack pressure throughout CygwinCorinna Vinschen2015-07-191-19/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * dcrt0.cc (initial_env): Reduce size of local path buffers to PATH_MAX. Allocate debugger_command from process heap. (init_windows_system_directory): Very early initialize new global variable global_progname. * dll_init.cc (dll_list::alloc): Make path buffer static. Explain why. (dll_list::populate_deps): Use tmp_pathbuf for local path buffer. * exceptions.cc (debugger_command): Convert to PWCHAR. (error_start_init): Allocate debugger_command and fill with wide char strings. Only allocate if NULL. (try_to_debug): Just check if debugger_command is a NULL pointer to return. Drop conversion from char to WCHAR and drop local variable dbg_cmd. * globals.cc (global_progname): New global variable to store Windows application path. * pinfo.cc (pinfo_basic::pinfo_basic): Just copy progname over from global_progname. (pinfo::status_exit): Let path_conv create the POSIX path to avoid local buffer. * pseudo_reloc.cc (__report_error): Utilize global_progname, drop local buffer. * smallprint.cc (__small_vsprintf): Just utilize global_progname for %P format specifier. (__small_vswprintf): Ditto. * strace.cc (PROTECT): Change to reflect x being a pointer. Reformat. (CHECK): Ditto. Reformat. (strace::activate): Utilize global_progname, drop local buffer. Fix formatting. (strace::vsprntf): Reduce size of local progname buffer to NAME_MAX. Copy and, if necessary, convert only the last path component to progname. (strace_buf_guard): New muto. (buf): New static pointer. (strace::vprntf): Use buf under strace_buf_guard lock only. Allocate buffer space for buf on Windows heap. * wow64.cc (wow64_respawn_process): Utilize global_progname, drop local path buffer. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Rearrange makecontext and add lots of commentsCorinna Vinschen2015-07-181-12/+37
| | | | | | | * exceptions.cc (makecontext): Rearrange order of initialization and document at great length. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Fix ucontext creation in call_signal handlerCorinna Vinschen2015-07-171-4/+15
| | | | | | | | * exceptions.cc (__unwind_single_frame): Define empty macro on i686. (_cygtls::call_signal_handler): Try to make sure signal context makes sense in case we're generating context here. Add comment to explain. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Comment fixupCorinna Vinschen2015-07-171-6/+6
| | | | | | | | | * exceptions.cc (getcontext/x86_64): Drop comment on RtlCaptureContext. (swapcontext/x86_64): Fix comment yet again. (getcontext/i686): Move comment from x86_64 getcontext, slightly rearranged, to preceeding comment. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Reuse __unwind_single_frame where appropriateCorinna Vinschen2015-07-171-58/+32
| | | | | | | | | | | | * exceptions.cc (__unwind_single_frame): Move up in file to be accessible from other places. Move comment to getcontext. (stack_info::walk): Call __unwind_single_frame in 64 bit case. Fix preceeding comment. (myfault_altstack_handler): Call __unwind_single_frame. (getcontext): Give comment from __unwind_single_frame a new home. (swapcontext): Fix comment. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Implement getcontext, setcontext, makecontext, swapcontextCorinna Vinschen2015-07-171-0/+224
| | | | | | | | | | | | | | | | | | | | | | | | | | | | * common.din (getcontext): Export. (makecontext): Export. (setcontext): Export. (swapcontext): Export. * exceptions.cc (__unwind_single_frame): New static functions, 64 bit only. (setcontext): New function. (getcontext): New function. (swapcontext): New function. (__cont_link_context): New function. (makecontext): New function. * include/cygwin/version.h (CYGWIN_VERSION_DLL_MAJOR): Bump to 2002. (CYGWIN_VERSION_API_MINOR): Bump. * include/ucontext.h (getcontext): Add prototype. (setcontext): Ditto. (swapcontext): Ditto. (makecontext): Ditto. * ntdll.h (NtContinue): Ditto. * new-features.xml (ov-new2.2): Add new section. Document getcontext, setcontext, makecontext, swapcontext. * posix.xml (std-deprec): Add getcontext, setcontext, makecontext, swapcontext. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* exceptions.cc: Reenable code only disabled for debug purposesCorinna Vinschen2015-07-131-2/+0
| | | | | | | * exceptions.cc (exception::handle): Reenable code only disabled for debug purposes. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* x86_64: Handle myfault exceptions when running on alternate signal stackCorinna Vinschen2015-07-071-0/+46
| | | | | | | | | | | | | | | | | | x86_64 only: * cygtls.cc (san::leave): Restore _my_tls.andreas. * cygtls.h (class san): Add _clemente as in 32 bit case. Add ret and frame members. (san::san): Handle _my_tls.andreas as on 32 bit. Take parameter and write it to new member ret. Store current stack pointer in frame. (san::~san): New destructor to restore _my_tls.andreas. (__try): Use __l_except address as parameter to san::san. * dcrt0.cc (dll_crt0_0): Add myfault_altstack_handler as vectored continuation handler. * exception.h (myfault_altstack_handler): Declare. * exceptions.cc (myfault_altstack_handler): New function. Explain what it's good for. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Fix original stack when running signal handler on alternate stackCorinna Vinschen2015-07-041-21/+121
| | | | | | | | | | | | | | | | | | | | | | | | | | | * autoload.cc (SetThreadStackGuarantee): Import. * cygtls.h (struct _cygtls): Replace thread_context with a ucontext_t called context. * exceptions.cc (exception::handle): Exit from process via signal_exit in case sig_send returns from handling a stack overflow SIGSEGV. Explain why. (dumpstack_overflow_wrapper): Thread wrapper to create a stackdump from another thread. (signal_exit): Fix argument list to reflect three-arg signal handler. In case we have to create a stackdump for a stack overflow condition, do so from a separate thread. Explain why. (sigpacket::process): Don't run signal_exit on alternate stack. (altstack_wrapper): Wrapper function to do stack correction when calling the signal handler on an alternate stack to handle a stack overflow. Make sure to have lots of comments. (_cygtls::call_signal_handler): Drop local context variable to reduce stack pressure. Use this->context instead. Change inline assembler to call altstack_wrapper. (_cygtls::signal_debugger): Accommodate aforementioned change to struct _cygtls. * tlsoffset.h: Regenerate. * tlsoffset64.h: Regenerate. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Handle ss_flags value longjmp safe.Corinna Vinschen2015-06-271-4/+0
| | | | | | | | | * exceptions.cc (_cygtls::call_signal_handler): Drop manipulating thread's ss_flags here. It's not safe against longjmp. * signal.cc (sigaltstack): Check if we're running on the alternate stack and set ss_flags returned in oss to SS_ONSTACK. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Don't push on original stack during alternate signal stack setupCorinna Vinschen2015-06-221-56/+49
| | | | | | | | | * exceptions.cc (_cygtls::call_signal_handler): Drop pushing a register on the original stack, it confuses GCC. Rearrange the assembler code so that $rax/$eax is not used by GCC to prepare an argument value. Use $rax/$eax without saving. Drop clearing $rbp/$epb. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Safe all clobbered volatile registers when using alternate stackCorinna Vinschen2015-06-211-22/+47
| | | | | | | | | * exceptions.cc (_cygtls::call_signal_handler): Drop subtracting 16 bytes from the alternate stack, it's not necessary. Safe all clobbered registers. Safe one on the orignal stack, the others on the alternate stack on both platforms. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Fix commentsCorinna Vinschen2015-06-201-2/+2
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Implement using alternate signal stack in CygwinCorinna Vinschen2015-06-201-13/+108
| | | | | | | * exceptions.cc (_cygtls::call_signal_handler): Implement alternate signal stack handling. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Preliminary infrastructure to implement alternate stackCorinna Vinschen2015-06-191-4/+10
| | | | | | | | | | | | | | | | | | | | | | | * libc/include/sys/signal.h: Define SS_ONSTACK and SS_DISABLE unconditionally. (sigaltstack): Enable prototype on Cygwin. * common.din (sigaltstack): Export. * cygtls.cc (_cygtls::init_thread): Initialize altstack. * cygtls.h (__tlsstack_t): Rename from __stack_t to distinguish more clearly from stack_t. Accommodate throughout. (_cygtls): Add altstack member. * exceptions.cc (exception::handle): Set SIGSEGV handler to SIG_DFL if we encounter a stack overflow, and no alternate stack has been defined. * include/cygwin/signal.h (MINSIGSTKSZ): Define (SIGSTKSZ): Define. (SA_ONSTACK): Define. * signal.cc (sigaltstack): New function. * tlsoffset.h: Regenerate. * tlsoffset64.h: Ditto. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Formatting fixes in exceptions.ccCorinna Vinschen2015-06-191-37/+63
| | | | | | * Makefile.in (install-man): Exclude release subdir from search paths. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Don't enforce SA_RESTART in non-main threadsCorinna Vinschen2015-06-151-1/+6
| | | | | | | | * exceptions.cc (_cygtls::call_signal_handler): Disable enforcing SA_RESTART in non-main threads to allow returning with EINTR from system calls. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Set mcontext.cr2 to the faulting addressJon TURNEY2015-04-231-0/+4
| | | | | | | * exceptions.cc (call_signal_handler): Set mcontext.cr2 to the faulting address. Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
* Only construct ucontext for SA_SIGINFO signal handlersJon TURNEY2015-04-231-22/+32
| | | | | | | | * exceptions.cc (call_signal_handler): Only bother to construct the ucontext for signal handlers with SA_SIGINFO set. Set mcontext.oldmask. Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
* Initialize context before RtlContextCaptureJon TURNEY2015-04-231-2/+6
| | | | | | | * exceptions.cc (call_signal_handler): Zero initialize context and set context flags, as RlCaptureContext doesn't. Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
* Provide ucontext to signal handlersJon TURNEY2015-04-231-2/+21
| | | | | | | | | | | | | | Add ucontext.h header, defining ucontext_t and mcontext_t types. Provide sigaction sighandlers with a ucontext_t parameter, containing stack and context information. * include/sys/ucontext.h : New header. * include/ucontext.h : Ditto. * exceptions.cc (call_signal_handler): Provide ucontext_t parameter to signal handler function. Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
* Prepare to rename/reuse struct ucontext.Corinna Vinschen2015-04-231-4/+3
| | | | | | | | | * cygtls.h (struct _cygtls): Convert thread_context to type CONTEXT. * exceptions.cc (_cygtls::signal_debugger): Use sizeof (CONTEXT) for size of CONTEXT copied for GDB's digestion. * include/cygwin/signal.h: Add a preliminary comment. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Teach stackinfo::walk() how to virtually unwind the tls sigstackJon TURNEY2015-03-131-0/+13
| | | | | | | | | | This improves how stackinfo::dumpstack() dumps _sigbe and sigdelayed frames * exceptions.cc (stack_info): Add sigstackptr member. (walk): Unwind sigstackptr inside _sigbe and sigdelayed. * gendef (_sigdelayed_end): Add symbol to mark end of sigdelayed. Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
* * cygheap.cc (init_cygheap::init_tls_list): Accommodate threadlistCorinna Vinschen2014-11-281-16/+46
| | | | | | | | | | | | | | | | | | | | | | | | having a new type threadlist_t *. Convert commented out code into an #if 0. Create thread mutex. Explain why. (init_cygheap::remove_tls): Drop timeout value. Always wait infinitely for tls_sentry. Return mutex HANDLE of just deleted threadlist entry. (init_cygheap::find_tls): New implementation taking tls pointer as search parameter. Return threadlist_t *. (init_cygheap::find_tls): Return threadlist_t *. Define ix as auto variable. Drop exception handling since crash must be made impossible due to correct synchronization. Return with locked mutex. * cygheap.h (struct threadlist_t): Define. (struct init_cygheap): Convert threadlist to threadlist_t type. (init_cygheap::remove_tls): Align declaration to above change. (init_cygheap::find_tls): Ditto. (init_cygheap::unlock_tls): Define. * cygtls.cc (_cygtls::remove): Unlock and close mutex when finishing. * exceptions.cc (sigpacket::process): Lock _cygtls area of thread before accessing it. * fhandler_termios.cc (fhandler_termios::bg_check): Ditto. * sigproc.cc (sig_send): Ditto. * thread.cc (pthread::exit): Ditto. Add comment. (pthread::cancel): Ditto.
* * Throughout, use __try/__except/__endtry blocks, rather than myfaultCorinna Vinschen2014-08-221-54/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | handler. * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs has been moved from _local_storage to _cygtls. * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage of counters. Change type of counters to uint32_t for clarity. Remove _cygtls as friend class. (struct _local_storage): Move pathbufs from here... (struct _cygtls): ...to here, allowing to access it from _sigbe. (class san): Only define on 32 bit. Remove errno, _c_cnt and _w_cnt members. (san::setup): Drop parameter. Don't initialize removed members. (san::leave): Don't set removed members. (class myfault): Only define on 32 bit. (myfault::faulted): Only keep implementation not taking any parameter. Drop argument in call to sebastian.setup. (__try/__leave/__except/__endtry): Implement to support real SEH. For now stick to SJLJ on 32 bit. * dcrt0.cc (dll_crt0_0): Drop 64 bit call to exception::install_myfault_handler. * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION as return type. (PDISPATCHER_CONTEXT): Define as void * on 32 bit. Define as pointer to _DISPATCHER_CONTEXT on 64 bit. (class exception): Define separately for 32 and 64 bit. (exception::myfault): Add handler for myfault SEH handling on 64 bit. (exception::exception): Fix mangled method name to account for change in type of last parameter. (exception::install_myfault_handler): Remove. * exceptions.cc (exception::myfault_handle): Remove. (exception::myfault): New SEH handler for 64 bit. * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when returning to the caller. * ntdll.h: Move a comment to a better place. (struct _SCOPE_TABLE): Define on 64 bit. * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround. * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs. (tls_pathbuf::destroy): Change type of loop variables to uint32_t. * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to uint32_t. Accommodate new place of pathbufs. * tlsoffsets.h: Regenerate. * tlsoffsets64.h: Regenerate.
* * exceptions.cc (exception::myfault_handle): Rephrase comment.Corinna Vinschen2014-07-091-1/+4
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* * exceptions.cc (exception::myfault_handle): Fix typo in comment.Corinna Vinschen2014-07-091-1/+1
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* * exceptions.cc (exception::myfault_handle): Disable handlingCorinna Vinschen2014-07-071-0/+3
| | | | STATUS_STACK_OVERFLOW. Explain why.
* * exceptions.cc (try_to_debug): Free environment pointer when not usedCorinna Vinschen2014-06-231-1/+2
| | | | anymore (CID 59968).
* * exceptions.cc (try_to_debug): Fix size of dbg_cmd (CID 59929).Corinna Vinschen2014-05-191-1/+1
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* * exceptions.cc (exception::myfault_handle): Only handle the minimumCorinna Vinschen2014-04-091-1/+14
| | | | amount of exceptions the myfault handler was designed for.
* * DevNotes: Add entry cgf-000025.Christopher Faylor2014-03-291-27/+14
| | | | | | * exceptions.cc (_cygtls::signal_debugger): Reorganize to avoid contacting the debugger if we have already done so via the exception handler. Eliminate need for goto. Remove an ifdef in favor of just allocating a larger buffer.
* * dcrt0.cc (dll_crt0_0): Install myfault exception handler on x86_64.Corinna Vinschen2014-03-281-30/+18
| | | | | | | | | | | | | | | | | | | | | | * exception.h (exception_list): Typedef as void on x86_64. (exception::handler_installed): Remove. (exception::handle_while_being_debugged): Remove. (exception::myfault_handle): Declare for x86_64. (exception::handle): Declare as ordinary exception handler on x86_64 as well. (exception::exception): Drop previous code (again). Install exception::handle as SEH handler. (exception::install_myfault_handler): New x86_64-only method to install exception::myfault_handle as VEH handler. Explain why. (exception::~exception): For x86_64, define frame end label (again). * exceptions.cc (CYG_EXC_CONTINUE_EXECUTION): Drop definition. (CYG_EXC_CONTINUE_SEARCH): Ditto. (exception::myfault_handle): New x86_64-only method, VEH handler to handle myfault exceptions. (exception::handle): Define as ordinary exception handler on x86_64 as well. Use ExceptionContinueExecution and ExceptionContinueSearch throughout instead of deleted Cygwin macros. Don't handle myfault exceptions on x86_64.
* * exceptions.cc (_cygtls::signal_debugger): Move memcpy to copy contextCorinna Vinschen2014-03-281-5/+4
| | | | from incoming siginfo_t to thread_context, too.
* * exception.h (exception::handle_while_being_debugged): Declare.Corinna Vinschen2014-03-191-0/+8
| | | | | (exception::exception): Install unhandled exception filter. * exceptions.cc (exception::handle_while_being_debugged): New method.
* Partially revert patch from 2014-03-04.Corinna Vinschen2014-03-181-0/+2
| | | | | | | * exception.h (exception::handler_installed): Declare. (exception::exception): Install vectored exception handler on x86_64. (exception::~exception): Remove for x86_64. * exceptions.cc (exception::handler_installed): Define.
* * exception.h (exception::handler_installed): Remove.Corinna Vinschen2014-03-041-2/+0
| | | | | | | (exception::exception): Remove old code. Manually install SEH handler instead. (exception::~exception): For x86_64, define frame end label. * exceptions.cc (exception::handler_installed): Remove.
* * exceptions.h (cygwin_exception::open_stackdumpfile): Move old function intoChristopher Faylor2014-01-081-4/+5
| | | | | | | | | class. (cygwin_exception::h): New member. (cygwin_exception::cygwin_exception): Initialize h to NULL. * exceptions.cc (cygwin_exception::open_stackdumpfile): Move into cygwin_exception class. Use 'h' class member. (cygwin_exception::dumpstack): Close stack dump file handle if opened.
* * globals.cc (hntdll): Define/declare.Christopher Faylor2013-12-091-0/+3
| | | | | | * exceptions.cc (inside_kernel): Don't call GetModuleFileName if we know we're in ntdll. * sigproc.cc (wait_sig): Initialize hntdll.
* Throughout, drop unnecessary explicit includes of windows header filesCorinna Vinschen2013-11-241-2/+0
| | | | | | | | | | | | included by default. * winlean.h: Add long comment to explain why we have to define certain symbols. (_NORMALIZE_): Define. (_WINNLS_): Drop definition and subsequent undef. (_WINNETWK_): Ditto. (_WINSVC_): Ditto. 2013-11-23 Eric Blake <eblake@redhat.com>
* * exceptions.cc (signal_exit): Remove comment. Use __builtin_frame_address.Christopher Faylor2013-07-201-4/+2
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* * exceptions.cc (signal_exit): Nope. Nevermind. Dump core unconditionally.Christopher Faylor2013-07-201-2/+1
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* reword commentChristopher Faylor2013-07-191-1/+1
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