newlib/winsup/cygwin/exception.h

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/* exception.h
Copyright 1996, 1997, 1998, 2000, 2001, 2005, 2010, 2011, 1012, 2013, 2014
Red Hat, Inc.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#pragma once
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#ifndef __x86_64__
/* Documentation on the innards of 32 bit Windows exception handling (i.e.
from the perspective of a compiler implementor) apparently doesn't exist.
However, the following came from Onno Hovers <onno@stack.urc.tue.nl>
The first pointer to the chain of handlers is in the thread environment block
at FS:[0]. This chain has the following format:
typedef struct __EXCEPTION_FRAME
{
struct __EXCEPTION_FRAME *Prev; /-* pointer to the previous frame *-/
PEXCEPTION_HANDLER Handler; /-* handler function *-/
}
You register an exception handler in your compiler with this simple ASM
sequence:
PUSH _MyExceptionHandler
PUSH FS:[0]
MOV FS:[0],ESP
An exception frame MUST be on the stack! The frame may have more fields and
both Visual C++ and Borland C++ use more fields for themselves.
When an exception occurs the system calls all handlers starting with the
handler at FS:0, and then the previous etc. until one handler returns
ExceptionContinueExecution, which is 0. If a handler does not want to handle
the exception it should just return ExceptionContinueSearch, which is 1.
The handler has the following parameters:
ehandler (
PEXCEPTION_RECORD erecord,
PEXCEPTION_FRAME myframe,
PCONTEXT context, /-* context before and after *-/
PVOID dispatch) /-* something *-/
When a handler wants to handle the exception, it has some alternatives:
-one is to do do something about the exception condition, like emulating
an invalid instruction, mapping memory where there was a page fault, etc.
If the handler wants to have the context of the thread that causes the
exception changed, it should make that change in the context passed to the
handler.
-the second alternative is to call all exception handlers again, indicating
that you want them to clean up. This way all the __finally blocks get
executed. After doing that you change the context passed to the handler so
the code starts executing in the except block. For this purpose you could
call RtlUnwind. This (undocumented) function calls all exception handlers
up to but not including the exception frame passed to it. If NULL is passed
as exception frame RtlUnwind calls all exception handlers and then exits the
process. The parameters to RtlUnwind are:
RtlUnwind (
PEXCEPTION_FRAME endframe,
PVOID unusedEip,
PEXCEPTION_RECORD erecord,
DWORD returnEax)
You should set unusedEip to the address where RtlUnwind should return like
this:
PUSH 0
PUSH OFFSET ReturnUnwind
PUSH 0
PUSH 0
CALL RtlUnwind
ReturnUnwind:
.....
If no EXCEPTION_RECORD is passed, RtlUnwind makes a default exception
record. In any case, the ExceptionFlags part of this record has the
EH_UNWINDING (=2), flag set. (and EH_EXIT_UNWIND (=4), when NULL is passed as the end
frame.).
The handler for a exception as well as a for unwinds may be executed in the
thread causing the exception, but may also be executed in another (special
exception) thread. So it is not wise to make any assumptions about that!
As an alternative you may consider the SetUnhandledExceptionFilter API
to install your own exception filter. This one is documented.
*/
/* The January 1994 MSJ has an article entitled "Clearer, More Comprehensive
Error Processing with Win32 Structured Exception Handling". It goes into
a teensy bit of detail of the innards of exception handling (i.e. what we
have to do). */
* Throughout, use __try/__except/__endtry blocks, rather than myfault 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.
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typedef EXCEPTION_DISPOSITION (exception_handler) (EXCEPTION_RECORD *,
struct _exception_list *,
CONTEXT *,
void *);
typedef struct _exception_list
{
struct _exception_list *prev;
exception_handler *handler;
} exception_list;
extern exception_list *_except_list asm ("%fs:0");
* Throughout, use __try/__except/__endtry blocks, rather than myfault 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.
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typedef void *PDISPATCHER_CONTEXT;
class exception
{
exception_list el;
exception_list *save;
* Throughout, use __try/__except/__endtry blocks, rather than myfault 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.
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static EXCEPTION_DISPOSITION handle (EXCEPTION_RECORD *, exception_list *,
CONTEXT *, PDISPATCHER_CONTEXT);
public:
exception () __attribute__ ((always_inline))
{
/* Install SEH handler. */
* Throughout, use __try/__except/__endtry blocks, rather than myfault 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.
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save = _except_list;
el.handler = handle;
el.prev = _except_list;
_except_list = &el;
};
~exception () __attribute__ ((always_inline)) { _except_list = save; }
};
#else /* __x86_64__ */
* Throughout, use __try/__except/__endtry blocks, rather than myfault 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.
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#define exception_list void
typedef struct _DISPATCHER_CONTEXT *PDISPATCHER_CONTEXT;
class exception
{
static EXCEPTION_DISPOSITION myfault (EXCEPTION_RECORD *, exception_list *,
CONTEXT *, PDISPATCHER_CONTEXT);
static EXCEPTION_DISPOSITION handle (EXCEPTION_RECORD *, exception_list *,
CONTEXT *, PDISPATCHER_CONTEXT);
public:
exception () __attribute__ ((always_inline))
{
/* Install SEH handler. */
asm volatile ("\n\
1: \n\
.seh_handler \
* Throughout, use __try/__except/__endtry blocks, rather than myfault 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.
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_ZN9exception6handleEP17_EXCEPTION_RECORDPvP8_CONTEXTP19_DISPATCHER_CONTEXT, \
@except \n\
.seh_handlerdata \n\
.long 1 \n\
.rva 1b, 2f, 2f, 2f \n\
.seh_code \n");
};
~exception () __attribute__ ((always_inline))
{
asm volatile ("\n\
nop \n\
2: \n\
nop \n");
}
};
LONG CALLBACK myfault_altstack_handler (EXCEPTION_POINTERS *);
#endif /* !__x86_64__ */
* Throughout, use __try/__except/__endtry blocks, rather than myfault 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.
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* cygtls.h (_cygtls::signal_exit): Delete from class. * exception.h (cygwin_exception): New class. (cygwin_exception::dumpstack): Declare new function. (cygwin_exception::context): Ditto. (cygwin_exception::dump_exception): Ditto. * exceptions.cc (cygwin_exception::dump_exception): Move into cygwin_exception class. Accommodate new variable names. (cygwin_exception::dumpstack): Ditto stackdump -> dumpstack. (exception::handle): Move andreas processing earlier. Defer signal processing decisions to the signal thread where they belong. Pass exception information to sig_send via new siginfo_t si_cyg field. (ctrl_c_handler): Wait for SIGHUP signal to be processed since it could cause a process exit and we don't want races with thread exit lock. (signal_exit): Move back here from sigproc.cc. Modify arguments and remove from sigpacket class. Decide when to dump core based on signal type. (sigpacket::process): Handle exiting signals in context of threads rather than in the signal thread. Signal debugger on non-Windows signals. Remove setup_signal_exit call. * sigproc.cc (no_signals_available): Remove argument. (signal_exit_code): Delete. (close_my_readsig): Ditto. (_cygtls::signal_exit): Move to exceptions.cc. (sigproc_terminate): Don't attempt to terminate signal thread. (setup_signal_exit): Delete. (exit_thread): Use new si_cyg entry in siginfo_t. (sig_send): Just use empty initializer for si. Accommodate change in no_signals_available argument. (wait_sig): Remove attempt to "go asynchronous" on process exit. Delete __SIGEXIT handling. Don't ever exit. * sigproc.h: Remove __SIGEXIT from signal enum. Renumber. * include/cygwin/signal.h (siginfo_t): Add si_cyg entry.
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class cygwin_exception
{
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PUINT_PTR framep;
* cygtls.h (_cygtls::signal_exit): Delete from class. * exception.h (cygwin_exception): New class. (cygwin_exception::dumpstack): Declare new function. (cygwin_exception::context): Ditto. (cygwin_exception::dump_exception): Ditto. * exceptions.cc (cygwin_exception::dump_exception): Move into cygwin_exception class. Accommodate new variable names. (cygwin_exception::dumpstack): Ditto stackdump -> dumpstack. (exception::handle): Move andreas processing earlier. Defer signal processing decisions to the signal thread where they belong. Pass exception information to sig_send via new siginfo_t si_cyg field. (ctrl_c_handler): Wait for SIGHUP signal to be processed since it could cause a process exit and we don't want races with thread exit lock. (signal_exit): Move back here from sigproc.cc. Modify arguments and remove from sigpacket class. Decide when to dump core based on signal type. (sigpacket::process): Handle exiting signals in context of threads rather than in the signal thread. Signal debugger on non-Windows signals. Remove setup_signal_exit call. * sigproc.cc (no_signals_available): Remove argument. (signal_exit_code): Delete. (close_my_readsig): Ditto. (_cygtls::signal_exit): Move to exceptions.cc. (sigproc_terminate): Don't attempt to terminate signal thread. (setup_signal_exit): Delete. (exit_thread): Use new si_cyg entry in siginfo_t. (sig_send): Just use empty initializer for si. Accommodate change in no_signals_available argument. (wait_sig): Remove attempt to "go asynchronous" on process exit. Delete __SIGEXIT handling. Don't ever exit. * sigproc.h: Remove __SIGEXIT from signal enum. Renumber. * include/cygwin/signal.h (siginfo_t): Add si_cyg entry.
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PCONTEXT ctx;
EXCEPTION_RECORD *e;
HANDLE h;
* cygtls.h (_cygtls::signal_exit): Delete from class. * exception.h (cygwin_exception): New class. (cygwin_exception::dumpstack): Declare new function. (cygwin_exception::context): Ditto. (cygwin_exception::dump_exception): Ditto. * exceptions.cc (cygwin_exception::dump_exception): Move into cygwin_exception class. Accommodate new variable names. (cygwin_exception::dumpstack): Ditto stackdump -> dumpstack. (exception::handle): Move andreas processing earlier. Defer signal processing decisions to the signal thread where they belong. Pass exception information to sig_send via new siginfo_t si_cyg field. (ctrl_c_handler): Wait for SIGHUP signal to be processed since it could cause a process exit and we don't want races with thread exit lock. (signal_exit): Move back here from sigproc.cc. Modify arguments and remove from sigpacket class. Decide when to dump core based on signal type. (sigpacket::process): Handle exiting signals in context of threads rather than in the signal thread. Signal debugger on non-Windows signals. Remove setup_signal_exit call. * sigproc.cc (no_signals_available): Remove argument. (signal_exit_code): Delete. (close_my_readsig): Ditto. (_cygtls::signal_exit): Move to exceptions.cc. (sigproc_terminate): Don't attempt to terminate signal thread. (setup_signal_exit): Delete. (exit_thread): Use new si_cyg entry in siginfo_t. (sig_send): Just use empty initializer for si. Accommodate change in no_signals_available argument. (wait_sig): Remove attempt to "go asynchronous" on process exit. Delete __SIGEXIT handling. Don't ever exit. * sigproc.h: Remove __SIGEXIT from signal enum. Renumber. * include/cygwin/signal.h (siginfo_t): Add si_cyg entry.
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void dump_exception ();
void open_stackdumpfile ();
* cygtls.h (_cygtls::signal_exit): Delete from class. * exception.h (cygwin_exception): New class. (cygwin_exception::dumpstack): Declare new function. (cygwin_exception::context): Ditto. (cygwin_exception::dump_exception): Ditto. * exceptions.cc (cygwin_exception::dump_exception): Move into cygwin_exception class. Accommodate new variable names. (cygwin_exception::dumpstack): Ditto stackdump -> dumpstack. (exception::handle): Move andreas processing earlier. Defer signal processing decisions to the signal thread where they belong. Pass exception information to sig_send via new siginfo_t si_cyg field. (ctrl_c_handler): Wait for SIGHUP signal to be processed since it could cause a process exit and we don't want races with thread exit lock. (signal_exit): Move back here from sigproc.cc. Modify arguments and remove from sigpacket class. Decide when to dump core based on signal type. (sigpacket::process): Handle exiting signals in context of threads rather than in the signal thread. Signal debugger on non-Windows signals. Remove setup_signal_exit call. * sigproc.cc (no_signals_available): Remove argument. (signal_exit_code): Delete. (close_my_readsig): Ditto. (_cygtls::signal_exit): Move to exceptions.cc. (sigproc_terminate): Don't attempt to terminate signal thread. (setup_signal_exit): Delete. (exit_thread): Use new si_cyg entry in siginfo_t. (sig_send): Just use empty initializer for si. Accommodate change in no_signals_available argument. (wait_sig): Remove attempt to "go asynchronous" on process exit. Delete __SIGEXIT handling. Don't ever exit. * sigproc.h: Remove __SIGEXIT from signal enum. Renumber. * include/cygwin/signal.h (siginfo_t): Add si_cyg entry.
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public:
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cygwin_exception (PUINT_PTR in_framep, PCONTEXT in_ctx = NULL, EXCEPTION_RECORD *in_e = NULL):
framep (in_framep), ctx (in_ctx), e (in_e), h (NULL) {}
* cygtls.h (_cygtls::signal_exit): Delete from class. * exception.h (cygwin_exception): New class. (cygwin_exception::dumpstack): Declare new function. (cygwin_exception::context): Ditto. (cygwin_exception::dump_exception): Ditto. * exceptions.cc (cygwin_exception::dump_exception): Move into cygwin_exception class. Accommodate new variable names. (cygwin_exception::dumpstack): Ditto stackdump -> dumpstack. (exception::handle): Move andreas processing earlier. Defer signal processing decisions to the signal thread where they belong. Pass exception information to sig_send via new siginfo_t si_cyg field. (ctrl_c_handler): Wait for SIGHUP signal to be processed since it could cause a process exit and we don't want races with thread exit lock. (signal_exit): Move back here from sigproc.cc. Modify arguments and remove from sigpacket class. Decide when to dump core based on signal type. (sigpacket::process): Handle exiting signals in context of threads rather than in the signal thread. Signal debugger on non-Windows signals. Remove setup_signal_exit call. * sigproc.cc (no_signals_available): Remove argument. (signal_exit_code): Delete. (close_my_readsig): Ditto. (_cygtls::signal_exit): Move to exceptions.cc. (sigproc_terminate): Don't attempt to terminate signal thread. (setup_signal_exit): Delete. (exit_thread): Use new si_cyg entry in siginfo_t. (sig_send): Just use empty initializer for si. Accommodate change in no_signals_available argument. (wait_sig): Remove attempt to "go asynchronous" on process exit. Delete __SIGEXIT handling. Don't ever exit. * sigproc.h: Remove __SIGEXIT from signal enum. Renumber. * include/cygwin/signal.h (siginfo_t): Add si_cyg entry.
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void dumpstack ();
PCONTEXT context () const {return ctx;}
EXCEPTION_RECORD *exception_record () const {return e;}
* cygtls.h (_cygtls::signal_exit): Delete from class. * exception.h (cygwin_exception): New class. (cygwin_exception::dumpstack): Declare new function. (cygwin_exception::context): Ditto. (cygwin_exception::dump_exception): Ditto. * exceptions.cc (cygwin_exception::dump_exception): Move into cygwin_exception class. Accommodate new variable names. (cygwin_exception::dumpstack): Ditto stackdump -> dumpstack. (exception::handle): Move andreas processing earlier. Defer signal processing decisions to the signal thread where they belong. Pass exception information to sig_send via new siginfo_t si_cyg field. (ctrl_c_handler): Wait for SIGHUP signal to be processed since it could cause a process exit and we don't want races with thread exit lock. (signal_exit): Move back here from sigproc.cc. Modify arguments and remove from sigpacket class. Decide when to dump core based on signal type. (sigpacket::process): Handle exiting signals in context of threads rather than in the signal thread. Signal debugger on non-Windows signals. Remove setup_signal_exit call. * sigproc.cc (no_signals_available): Remove argument. (signal_exit_code): Delete. (close_my_readsig): Ditto. (_cygtls::signal_exit): Move to exceptions.cc. (sigproc_terminate): Don't attempt to terminate signal thread. (setup_signal_exit): Delete. (exit_thread): Use new si_cyg entry in siginfo_t. (sig_send): Just use empty initializer for si. Accommodate change in no_signals_available argument. (wait_sig): Remove attempt to "go asynchronous" on process exit. Delete __SIGEXIT handling. Don't ever exit. * sigproc.h: Remove __SIGEXIT from signal enum. Renumber. * include/cygwin/signal.h (siginfo_t): Add si_cyg entry.
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};