306 lines
7.0 KiB
C++
306 lines
7.0 KiB
C++
/* cygtls.h
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Copyright 2003, 2004, 2005, 2008, 2009, 2010, 2011 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 <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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#define CYGTLS_INITIALIZED 0xc763173f
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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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#define TP_NUM_C_BUFS 10
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#define TP_NUM_W_BUFS 10
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#ifdef CYGTLS_HANDLE
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#include "thread.h"
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#endif
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#pragma pack(push,4)
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/* Defined here to support auto rebuild of tlsoffsets.h. */
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class tls_pathbuf
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{
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int c_cnt;
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int w_cnt;
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char *c_buf[TP_NUM_C_BUFS];
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WCHAR *w_buf[TP_NUM_W_BUFS];
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public:
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void destroy ();
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friend class tmp_pathbuf;
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friend class _cygtls;
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friend class san;
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};
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class unionent
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{
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public:
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char *name;
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char **list;
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short port_proto_addrtype;
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short h_len;
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union
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{
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char *s_proto;
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char **h_addr_list;
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};
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enum struct_type
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{
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t_hostent, t_protoent, t_servent
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};
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};
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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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/* 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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struct {
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HANDLE sockevt;
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int max_w4;
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LONG *ser_num; // note: malloced
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HANDLE *w4; // note: malloced
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} select;
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/* strerror */
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char strerror_buf[sizeof ("Unknown error 4294967295")];
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/* times.cc */
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char timezone_buf[20];
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/* strsig.cc */
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char signamebuf[sizeof ("Unknown signal 4294967295 ")];
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/* net.cc */
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char *ntoa_buf; // note: malloced
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unionent *hostent_buf; // note: malloced
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unionent *protoent_buf; // note: malloced
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unionent *servent_buf; // note: malloced
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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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/* All functions requiring temporary path buffers. */
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tls_pathbuf pathbufs;
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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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/* 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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class _cygtls
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{
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public:
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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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sigset_t sigmask;
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sigset_t sigwait_mask;
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siginfo_t *sigwait_info;
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struct ucontext thread_context;
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DWORD thread_id;
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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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class san *andreas;
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waitq wq;
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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 *stackptr;
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__stack_t stack[TLS_STACK_SIZE];
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unsigned initialized;
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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 struct _cygtls *find_tls (int sig);
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void remove (DWORD);
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void push (__stack_t) __attribute__ ((regparm (2)));
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__stack_t pop () __attribute__ ((regparm (1)));
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__stack_t retaddr () {return stackptr[-1];}
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bool isinitialized () const
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{
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return initialized == CYGTLS_INITIALIZED;
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}
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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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bool inside_kernel (CONTEXT *);
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void signal_exit (int) __attribute__ ((noreturn, regparm(2)));
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void copy_context (CONTEXT *) __attribute__ ((regparm(2)));
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void signal_debugger (int) __attribute__ ((regparm(2)));
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#ifdef CYGTLS_HANDLE
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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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private:
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void call2 (DWORD (*) (void *, void *), void *, void *) __attribute__ ((regparm (3)));
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/*gentls_offsets*/
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};
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#pragma pack(pop)
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const int CYGTLS_PADSIZE = 12700; /* FIXME: Find some way to autogenerate
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this value */
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/*gentls_offsets*/
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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 - CYGTLS_PADSIZE)))
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extern _cygtls *_main_tls;
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extern _cygtls *_sig_tls;
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class san
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{
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san *_clemente;
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jmp_buf _context;
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int _errno;
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int _c_cnt;
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int _w_cnt;
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public:
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int setup (int myerrno = 0) __attribute__ ((always_inline))
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{
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_clemente = _my_tls.andreas;
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_my_tls.andreas = this;
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_errno = myerrno;
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_c_cnt = _my_tls.locals.pathbufs.c_cnt;
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_w_cnt = _my_tls.locals.pathbufs.w_cnt;
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return __sjfault (_context);
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}
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void leave () __attribute__ ((always_inline))
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{
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if (_errno)
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set_errno (_errno);
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/* Restore tls_pathbuf counters in case of error. */
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_my_tls.locals.pathbufs.c_cnt = _c_cnt;
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_my_tls.locals.pathbufs.w_cnt = _w_cnt;
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__ljfault (_context, 1);
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}
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void reset () __attribute__ ((always_inline))
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{
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_my_tls.andreas = _clemente;
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}
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};
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class myfault
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{
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san sebastian;
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public:
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~myfault () __attribute__ ((always_inline)) { sebastian.reset (); }
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inline int faulted () __attribute__ ((always_inline))
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{
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return sebastian.setup (0);
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}
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inline int faulted (void const *obj, int myerrno = 0) __attribute__ ((always_inline))
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{
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return !obj || !(*(const char **) obj) || sebastian.setup (myerrno);
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}
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inline int faulted (int myerrno) __attribute__ ((always_inline))
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{
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return sebastian.setup (myerrno);
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}
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};
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#define __getreent() (&_my_tls.local_clib)
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#endif /*_CYGTLS_H*/ /*gentls_offsets*/
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