149 lines
4.0 KiB
C++
149 lines
4.0 KiB
C++
/* child_info.h: shared child info for cygwin
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Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2008 Red Hat, Inc.
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This file is part of Cygwin.
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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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#include <setjmp.h>
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enum child_info_types
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{
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_PROC_EXEC,
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_PROC_SPAWN,
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_PROC_FORK,
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_PROC_WHOOPS
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};
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enum child_status
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{
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_CI_STRACED = 0x01,
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_CI_ISCYGWIN = 0x02,
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_CI_SAW_CTRL_C = 0x04
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};
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#define OPROC_MAGIC_MASK 0xff00ff00
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#define OPROC_MAGIC_GENERIC 0xaf00f000
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#define PROC_MAGIC_GENERIC 0xaf00fa00
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#define PROC_EXEC (_PROC_EXEC)
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#define PROC_SPAWN (_PROC_SPAWN)
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#define PROC_FORK (_PROC_FORK)
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#define EXEC_MAGIC_SIZE sizeof(child_info)
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/* Change this value if you get a message indicating that it is out-of-sync. */
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#define CURR_CHILD_INFO_MAGIC 0xbdf5842aU
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/* NOTE: Do not make gratuitous changes to the names or organization of the
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below class. The layout is checksummed to determine compatibility between
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different cygwin versions. */
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class child_info
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{
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public:
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DWORD msv_count; // zeroed on < W2K3, set to pseudo-count on Vista
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DWORD cb; // size of this record
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DWORD intro; // improbable string
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unsigned long magic; // magic number unique to child_info
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unsigned short type; // type of record, exec, spawn, fork
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HANDLE subproc_ready; // used for synchronization with parent
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HANDLE user_h;
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HANDLE parent;
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init_cygheap *cygheap;
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void *cygheap_max;
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DWORD cygheap_reserve_sz;
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unsigned char flag;
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unsigned fhandler_union_cb;
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int retry; // number of times we've tried to start child process
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DWORD exit_code; // process exit code
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static int retry_count;// retry count;
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child_info (unsigned, child_info_types, bool);
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child_info (): subproc_ready (NULL), parent (NULL) {}
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~child_info ();
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void ready (bool);
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bool sync (int, HANDLE&, DWORD) __attribute__ ((regparm (3)));
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DWORD proc_retry (HANDLE) __attribute__ ((regparm (2)));
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bool isstraced () const {return !!(flag & _CI_STRACED);}
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bool iscygwin () const {return !!(flag & _CI_ISCYGWIN);}
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bool saw_ctrl_c () const {return !!(flag & _CI_SAW_CTRL_C);}
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void set_saw_ctrl_c () {flag |= _CI_SAW_CTRL_C;}
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};
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class mount_info;
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class _pinfo;
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class child_info_fork: public child_info
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{
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public:
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HANDLE forker_finished;// for synchronization with child
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jmp_buf jmp; // where child will jump to
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void *stackaddr; // address of parent stack
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void *stacktop; // location of top of parent stack
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void *stackbottom; // location of bottom of parent stack
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size_t guardsize; // size of POSIX guard region or (size_t) -1 if
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// user stack
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char filler[4];
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child_info_fork ();
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void handle_fork () __attribute__ ((regparm (1)));;
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bool handle_failure (DWORD) __attribute__ ((regparm (2)));
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void alloc_stack ();
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void alloc_stack_hard_way (volatile char *);
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};
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class fhandler_base;
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class cygheap_exec_info
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{
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public:
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char *old_title;
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int argc;
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char **argv;
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int envc;
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char **envp;
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HANDLE myself_pinfo;
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};
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class child_info_spawn: public child_info
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{
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public:
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cygheap_exec_info *moreinfo;
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int __stdin;
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int __stdout;
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char filler[4];
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~child_info_spawn ()
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{
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if (moreinfo)
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{
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if (moreinfo->old_title)
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cfree (moreinfo->old_title);
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if (moreinfo->envp)
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{
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for (char **e = moreinfo->envp; *e; e++)
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cfree (*e);
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cfree (moreinfo->envp);
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}
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if (type != _PROC_SPAWN && moreinfo->myself_pinfo)
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CloseHandle (moreinfo->myself_pinfo);
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cfree (moreinfo);
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}
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}
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child_info_spawn (): moreinfo (NULL) {};
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child_info_spawn (child_info_types, bool);
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void *operator new (size_t, void *p) __attribute__ ((nothrow)) {return p;}
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void set (child_info_types ci, bool b) { new (this) child_info_spawn (ci, b);}
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void handle_spawn () __attribute__ ((regparm (1)));
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};
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void __stdcall init_child_info (DWORD, child_info *, HANDLE);
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extern "C" {
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extern child_info *child_proc_info;
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extern child_info_spawn *spawn_info asm ("_child_proc_info");
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extern child_info_fork *fork_info asm ("_child_proc_info");
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}
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