c9629cefe9
(cygtls::andreas): New element. Replaces _myfault and _myfault_errno. (cygtls::fault_guarded): Use andreas. (cygtls::return_from_fault): Ditto. (cygtls::setup_fault): Add a parameter denoting where to store old fault handler, if any and use it to "stack" faults. (cygtls::reset_fault): Restore fault from parameter. (myfault::sebastian): New variable. (myfault::~myfault): Pass sebastian to reset_fault. (myfault::myfault): Store old fault values in sebastian.
276 lines
6.6 KiB
C++
276 lines
6.6 KiB
C++
/* cygtls.h
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Copyright 2003, 2004, 2005 Red Hat, Inc.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _CYGTLS_H
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#define _CYGTLS_H
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#include <signal.h>
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#include <pwd.h>
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#include <grp.h>
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#include <sys/time.h>
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#define _NOMNTENT_FUNCS
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#include <mntent.h>
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#undef _NOMNTENT_FUNCS
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#include <setjmp.h>
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#ifndef _WINSOCK_H
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/* Stupid hack: Including winsock.h explicitly causes too many problems. */
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struct sockaddr_in
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{
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short sin_family;
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u_short sin_port;
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struct in_addr
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{
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union
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{
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struct
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{
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u_char s_b1, s_b2, s_b3, s_b4;
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} S_un_b;
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struct
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{
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u_short s_w1, s_w2;
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} S_un_w;
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u_long S_addr;
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} S_un;
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};
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struct in_addr sin_addr;
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char sin_zero[8];
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};
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typedef unsigned int SOCKET;
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#endif
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#define CYGTLS_INITIALIZED 0x43227
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#define CYGTLS_EXCEPTION (0x43227 + true)
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#define CYGTLSMAGIC "D0Ub313v31nm&G1c?";
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#ifndef CYG_MAX_PATH
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# define CYG_MAX_PATH 260
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#endif
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#ifndef UNLEN
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# define UNLEN 256
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#endif
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#define TLS_STACK_SIZE 256
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#include "cygthread.h"
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#pragma pack(push,4)
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struct _local_storage
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{
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/*
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Needed for the group functions
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*/
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struct __group16 grp;
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char *namearray[2];
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int grp_pos;
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/* console.cc */
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unsigned rarg;
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/* dlfcn.cc */
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int dl_error;
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char dl_buffer[256];
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/* passwd.cc */
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struct passwd res;
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char pass[_PASSWORD_LEN];
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int pw_pos;
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/* path.cc */
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struct mntent mntbuf;
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int iteration;
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unsigned available_drives;
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char mnt_type[80];
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char mnt_opts[80];
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char mnt_fsname[CYG_MAX_PATH];
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char mnt_dir[CYG_MAX_PATH];
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/* select.cc */
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SOCKET exitsock;
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struct sockaddr_in exitsock_sin;
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/* strerror */
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char strerror_buf[sizeof ("Unknown error 4294967295")];
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/* sysloc.cc */
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char *process_ident; // note: malloced
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int process_logopt;
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int process_facility;
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int process_logmask;
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/* times.cc */
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char timezone_buf[20];
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struct tm _localtime_buf;
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/* uinfo.cc */
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char username[UNLEN + 1];
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/* net.cc */
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char *ntoa_buf; // note: malloced
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struct protoent *protoent_buf; // note: malloced
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struct servent *servent_buf; // note: malloced
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struct hostent *hostent_buf; // note: malloced
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char signamebuf[sizeof ("Unknown signal 4294967295 ")];
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/* cygthread.cc */
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char unknown_thread_name[30];
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/* syscalls.cc */
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int setmode_file;
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int setmode_mode;
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};
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typedef struct struct_waitq
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{
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int pid;
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int options;
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int status;
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HANDLE ev;
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void *rusage; /* pointer to potential rusage */
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struct struct_waitq *next;
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HANDLE thread_ev;
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} waitq;
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typedef struct
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{
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void *_myfault;
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int _myfault_errno;
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} san;
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/* Changes to the below structure may require acompanying changes to the very
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simple parser in the perl script 'gentls_offsets' (<<-- start parsing here).
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The union in this structure is used to force alignment between the version
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of the compiler used to generate tlsoffsets.h and the cygwin cross compiler.
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*/
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/*gentls_offsets*/
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#include "cygerrno.h"
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extern "C" int __sjfault (jmp_buf);
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extern "C" int __ljfault (jmp_buf, int);
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/*gentls_offsets*/
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typedef __uint32_t __stack_t;
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struct _cygtls
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{
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void (*func) /*gentls_offsets*/(int)/*gentls_offsets*/;
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int saved_errno;
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int sa_flags;
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sigset_t oldmask;
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sigset_t deltamask;
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HANDLE event;
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int *errno_addr;
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unsigned initialized;
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sigset_t sigmask;
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sigset_t sigwait_mask;
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siginfo_t *sigwait_info;
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unsigned threadkill;
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siginfo_t infodata;
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struct pthread *tid;
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union
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{
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struct _reent local_clib;
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char __dontuse[8 * ((sizeof(struct _reent) + 4) / 8)];
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};
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struct _local_storage locals;
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class cygthread *_ctinfo;
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san andreas;
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waitq wq;
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struct _cygtls *prev, *next;
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__stack_t *stackptr;
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int sig;
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unsigned incyg;
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unsigned spinning;
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unsigned stacklock;
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__stack_t stack[TLS_STACK_SIZE];
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unsigned padding[0];
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/*gentls_offsets*/
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static CRITICAL_SECTION protect_linked_list;
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static void init ();
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void init_thread (void *, DWORD (*) (void *, void *));
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static void call (DWORD (*) (void *, void *), void *);
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static void call2 (DWORD (*) (void *, void *), void *, void *) __attribute__ ((regparm (3)));
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static struct _cygtls *find_tls (int sig);
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void remove (DWORD);
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void push (__stack_t, bool) __attribute__ ((regparm (3)));
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__stack_t pop () __attribute__ ((regparm (1)));
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bool isinitialized () const {return initialized == CYGTLS_INITIALIZED || initialized == CYGTLS_EXCEPTION;}
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bool in_exception () const {return initialized == CYGTLS_EXCEPTION;}
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void set_state (bool);
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void reset_exception ();
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bool interrupt_now (CONTEXT *, int, void *, struct sigaction&)
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__attribute__((regparm(3)));
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void __stdcall interrupt_setup (int sig, void *handler,
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struct sigaction& siga)
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__attribute__((regparm(3)));
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void init_threadlist_exceptions (struct _exception_list *);
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#ifdef _THREAD_H
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operator HANDLE () const {return tid->win32_obj_id;}
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#endif
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void set_siginfo (struct sigpacket *) __attribute__ ((regparm (3)));
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void set_threadkill () {threadkill = true;}
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void reset_threadkill () {threadkill = false;}
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int call_signal_handler () __attribute__ ((regparm (1)));
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void remove_wq (DWORD) __attribute__ ((regparm (1)));
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void fixup_after_fork () __attribute__ ((regparm (1)));
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void lock () __attribute__ ((regparm (1)));
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void unlock () __attribute__ ((regparm (1)));
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bool locked () __attribute__ ((regparm (1)));
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void*& fault_guarded () {return andreas._myfault;}
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void return_from_fault ()
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{
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if (andreas._myfault_errno)
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set_errno (andreas._myfault_errno);
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__ljfault ((int *) andreas._myfault, 1);
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}
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int setup_fault (jmp_buf j, san& old_j, int myerrno) __attribute__ ((always_inline))
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{
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old_j._myfault = andreas._myfault;
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old_j._myfault_errno = andreas._myfault_errno;
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andreas._myfault = (void *) j;
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andreas._myfault_errno = myerrno;
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return __sjfault (j);
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}
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void reset_fault (san& old_j) __attribute__ ((always_inline))
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{
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andreas._myfault = old_j._myfault;
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andreas._myfault_errno = old_j._myfault_errno;
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}
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/*gentls_offsets*/
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};
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#pragma pack(pop)
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extern char *_tlsbase __asm__ ("%fs:4");
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extern char *_tlstop __asm__ ("%fs:8");
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#define _my_tls (((_cygtls *) _tlsbase)[-1])
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extern _cygtls *_main_tls;
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extern _cygtls *_sig_tls;
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/*gentls_offsets*/
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class myfault
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{
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jmp_buf buf;
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san sebastian;
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public:
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~myfault () __attribute__ ((always_inline)) { _my_tls.reset_fault (sebastian); }
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inline int faulted (int myerrno = 0) __attribute__ ((always_inline))
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{
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return _my_tls.setup_fault (buf, sebastian, myerrno);
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}
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};
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/*gentls_offsets*/
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#define __getreent() (&_my_tls.local_clib)
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const int CYGTLS_PADSIZE = (((char *) _main_tls->padding) - ((char *) _main_tls));
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#endif /*_CYGTLS_H*/
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