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/* child_info.h: shared child info for cygwin
Copyright 2000, 2001, 2002, 2003, 2004, 2005 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <setjmp.h>
enum child_info_types
{
_PROC_EXEC,
_PROC_SPAWN,
_PROC_FORK,
_PROC_WHOOPS
};
#define OPROC_MAGIC_MASK 0xff00ff00
#define OPROC_MAGIC_GENERIC 0xaf00f000
#define PROC_MAGIC_GENERIC 0xaf00fa00
#define PROC_EXEC (_PROC_EXEC)
#define PROC_SPAWN (_PROC_SPAWN)
#define PROC_FORK (_PROC_FORK)
#define EXEC_MAGIC_SIZE sizeof(child_info)
#define CURR_CHILD_INFO_MAGIC 0x4160e87bU
/* NOTE: Do not make gratuitous changes to the names or organization of the
below class. The layout is checksummed to determine compatibility between
different cygwin versions. */
class child_info
{
public:
DWORD zero[4]; // must be zeroed
DWORD cb; // size of this record
DWORD intro; // improbable string
unsigned long magic; // magic number unique to child_info
unsigned short type; // type of record, exec, spawn, fork
HANDLE subproc_ready; // used for synchronization with parent
HANDLE user_h;
HANDLE parent;
init_cygheap *cygheap;
void *cygheap_max;
DWORD cygheap_reserve_sz;
unsigned char straced;
unsigned fhandler_union_cb;
child_info (unsigned, child_info_types, bool);
child_info (): subproc_ready (NULL), parent (NULL) {}
~child_info ();
void ready (bool);
bool sync (int, HANDLE&, DWORD) __attribute__ ((regparm (3)));
};
class mount_info;
class _pinfo;
class child_info_fork: public child_info
{
public:
HANDLE forker_finished;// for synchronization with child
DWORD stacksize; // size of parent stack
jmp_buf jmp; // where child will jump to
void *stacktop; // location of top of parent stack
void *stackbottom; // location of bottom of parent stack
int retry; // number of times we've tried to fork
child_info_fork ();
void handle_fork ();
bool handle_failure (DWORD);
};
class fhandler_base;
class cygheap_exec_info
{
public:
char *old_title;
int argc;
char **argv;
int envc;
char **envp;
HANDLE myself_pinfo;
};
class child_info_spawn: public child_info
{
public:
cygheap_exec_info *moreinfo;
~child_info_spawn ()
{
if (moreinfo)
{
if (moreinfo->old_title)
cfree (moreinfo->old_title);
if (moreinfo->envp)
{
for (char **e = moreinfo->envp; *e; e++)
cfree (*e);
cfree (moreinfo->envp);
}
CloseHandle (moreinfo->myself_pinfo);
cfree (moreinfo);
}
}
child_info_spawn (): moreinfo (NULL) {};
child_info_spawn (child_info_types, bool);
void *operator new (size_t, void *p) __attribute__ ((nothrow)) {return p;}
void set (child_info_types ci, bool b) { new (this) child_info_spawn (ci, b);}
};
void __stdcall init_child_info (DWORD, child_info *, HANDLE);
extern "C" {
extern child_info *child_proc_info;
extern child_info_spawn *spawn_info asm ("_child_proc_info");
extern child_info_fork *fork_info asm ("_child_proc_info");
}
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