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* cygmagic: Add define name to warning.

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* dcrt0.cc (_dll_crt0): Check for changes in child_info size.
(multiple_cygwin_problem): Avoid "proc" errors when testing.  Just assume new
cygwin proc.
* shared_info.h (mount_info): Add 'cb' element for sanity checks.
(shared_info): Ditto.
* child_info.h (child_info): Add fhandler_union_size element for sanity
checking.
* shared.cc (open_shared): Detect shared region size mismatch between parent
and child.
(shared_info::initialize): Detect shared region size mismatch with expectation.
(memory_Init): Ditto.
* sigproc.cc (init_child_info): Correctly set cb in passed structure.
* shared.cc (open_shared):
This commit is contained in:
Christopher Faylor
2001-12-26 21:35:16 +00:00
parent dcd8b9be82
commit aaf219f01e
7 changed files with 67 additions and 17 deletions
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18
winsup/cygwin/ChangeLog
View File

@@ -1,3 +1,21 @@
2001-12-26 Christopher Faylor <cgf@redhat.com>
* cygmagic: Add define name to warning.
* dcrt0.cc (_dll_crt0): Check for changes in child_info size.
(multiple_cygwin_problem): Avoid "proc" errors when testing. Just
assume new cygwin proc.
* shared_info.h (mount_info): Add 'cb' element for sanity checks.
(shared_info): Ditto.
* child_info.h (child_info): Add fhandler_union_size element for sanity
checking.
* shared.cc (open_shared): Detect shared region size mismatch between
parent and child.
(shared_info::initialize): Detect shared region size mismatch with
expectation.
(memory_Init): Ditto.
* sigproc.cc (init_child_info): Correctly set cb in passed structure.
* shared.cc (open_shared):
2001-12-26 Christopher Faylor <cgf@redhat.com>
* include/getopt.h: Protect a declaratin.

3
winsup/cygwin/child_info.h
View File

@@ -28,7 +28,7 @@ enum
#define EXEC_MAGIC_SIZE sizeof(child_info)
#define CURR_CHILD_INFO_MAGIC 0xba17
#define CURR_CHILD_INFO_MAGIC 0x8b3c
/* NOTE: Do not make gratuitous changes to the names or organization of the
below class. The layout is checksummed to determine compatibility between
@@ -49,6 +49,7 @@ public:
init_cygheap *cygheap;
void *cygheap_max;
HANDLE cygheap_h;
unsigned fhandler_union_cb;
};
class child_info_fork: public child_info

2
winsup/cygwin/cygmagic
View File

@@ -14,7 +14,7 @@ while [ -n "$1" ]; do
echo "#define $define $sum"
curr=`sed -n "s/^#[ ]*define CURR_$define[ ][ ]*\([^ ][^ ]*\)/\1/p" $file`
[ "$curr" == "$sum" ] || echo "*** WARNING WARNING WARNING WARNING WARNING ***
*** $file: magic number changed old $curr != new $sum
*** $file: magic number for $define changed old $curr != new $sum
*** WARNING WARNING WARNING WARNING WARNING ***" 1>&2
done >> $file_magic
exit 0

26
winsup/cygwin/dcrt0.cc
View File

@@ -831,20 +831,29 @@ _dll_crt0 ()
else if (fork_info->intro == PROC_MAGIC_GENERIC
&& fork_info->magic != CHILD_INFO_MAGIC)
multiple_cygwin_problem ("proc", fork_info->magic, CHILD_INFO_MAGIC);
unsigned should_be_cb = 0;
switch (fork_info->type)
{
case _PROC_FORK:
user_data->forkee = fork_info->cygpid;
should_be_cb = sizeof (child_info_fork);
case _PROC_SPAWN:
if (fork_info->pppid_handle)
CloseHandle (fork_info->pppid_handle);
case _PROC_EXEC:
{
child_proc_info = fork_info;
cygwin_mount_h = child_proc_info->mount_h;
mypid = child_proc_info->cygpid;
break;
}
if (!should_be_cb)
should_be_cb = sizeof (child_info);
if (should_be_cb != fork_info->cb)
multiple_cygwin_problem ("proc size", fork_info->cb, should_be_cb);
else if (sizeof (fhandler_union) != fork_info->fhandler_union_cb)
multiple_cygwin_problem ("fhandler size", fork_info->fhandler_union_cb, sizeof (fhandler_union));
else
{
child_proc_info = fork_info;
cygwin_mount_h = child_proc_info->mount_h;
mypid = child_proc_info->cygpid;
break;
}
default:
system_printf ("unknown exec type %d", fork_info->type);
fork_info = NULL;
@@ -1025,6 +1034,11 @@ __api_fatal (const char *fmt, ...)
void
multiple_cygwin_problem (const char *what, unsigned magic_version, unsigned version)
{
if (_cygwin_testing && strstr (what, "proc"))
{
fork_info = NULL;
return;
}
if (CYGWIN_VERSION_MAGIC_VERSION (magic_version) != version)
api_fatal ("%s version mismatch detected - %p/%p.\n\
You have multiple copies of cygwin1.dll on your system.\n\

20
winsup/cygwin/shared.cc
View File

@@ -103,10 +103,12 @@ open_shared (const char *name, int n, HANDLE &shared_h, DWORD size, void *addr)
void
shared_info::initialize ()
{
if (inited)
if (version)
{
if (inited != SHARED_VERSION_MAGIC)
multiple_cygwin_problem ("shared", inited, SHARED_VERSION);
if (version != SHARED_VERSION_MAGIC)
multiple_cygwin_problem ("shared", version, SHARED_VERSION);
else if (cb != SHARED_INFO_CB)
multiple_cygwin_problem ("shared size", cb, SHARED_INFO_CB);
return;
}
@@ -115,7 +117,11 @@ shared_info::initialize ()
/* Initialize tty table. */
tty.init ();
inited = SHARED_VERSION_MAGIC;
version = SHARED_VERSION_MAGIC;
cb = sizeof (*this);
if (cb != SHARED_INFO_CB)
system_printf ("size of shared memory region changed from %u to %u",
SHARED_INFO_CB, cb);
}
void __stdcall
@@ -162,10 +168,16 @@ memory_init ()
{
mount_table->version = MOUNT_VERSION_MAGIC;
debug_printf ("initializing mount table");
mount_table->cb = sizeof (*mount_table);
if (mount_table->cb != MOUNT_INFO_CB)
system_printf ("size of mount table region changed from %u to %u",
MOUNT_INFO_CB, mount_table->cb);
mount_table->init (); /* Initialize the mount table. */
}
else if (mount_table->version != MOUNT_VERSION_MAGIC)
multiple_cygwin_problem ("mount", mount_table->version, MOUNT_VERSION);
else if (mount_table->cb != MOUNT_INFO_CB)
multiple_cygwin_problem ("mount table size", mount_table->cb, MOUNT_INFO_CB);
}

12
winsup/cygwin/shared_info.h
View File

@@ -17,7 +17,6 @@ class mount_item
public:
/* FIXME: Nasty static allocation. Need to have a heap in the shared
area [with the user being able to configure at runtime the max size]. */
/* Win32-style mounted partition source ("C:\foo\bar").
native_path[0] == 0 for unused entries. */
char native_path[MAX_PATH];
@@ -42,7 +41,8 @@ class mount_item
#define MOUNT_VERSION 27 // increment when mount table changes and
#define MOUNT_VERSION_MAGIC CYGWIN_VERSION_MAGIC (MOUNT_MAGIC, MOUNT_VERSION)
#define CURR_MOUNT_MAGIC 0xfe35
#define CURR_MOUNT_MAGIC 0x41e0
#define MOUNT_INFO_CB 16488
class reg_key;
@@ -53,6 +53,7 @@ class mount_info
{
public:
DWORD version;
unsigned cb;
DWORD sys_mount_table_counter;
int nmounts;
mount_item mount[MAX_MOUNTS];
@@ -138,14 +139,17 @@ public:
cygwin_version.api_minor)
#define SHARED_VERSION_MAGIC CYGWIN_VERSION_MAGIC (SHARED_MAGIC, SHARED_VERSION)
#define CURR_SHARED_MAGIC 0x6f6e
#define SHARED_INFO_CB 47112
#define CURR_SHARED_MAGIC 0x88e
/* 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 shared_info
{
DWORD inited;
DWORD version;
DWORD cb;
public:
int heap_chunk_in_mb;
DWORD sys_mount_table_counter;

3
winsup/cygwin/sigproc.cc
View File

@@ -857,13 +857,14 @@ void __stdcall
init_child_info (DWORD chtype, child_info *ch, pid_t pid, HANDLE subproc_ready)
{
memset (ch, 0, sizeof *ch);
ch->cb = sizeof *ch;
ch->cb = chtype == PROC_FORK ? sizeof (child_info_fork) : sizeof (child_info);
ch->intro = PROC_MAGIC_GENERIC;
ch->magic = CHILD_INFO_MAGIC;
ch->type = chtype;
ch->cygpid = pid;
ch->subproc_ready = subproc_ready;
ch->pppid_handle = myself->ppid_handle;
ch->fhandler_union_cb = sizeof (fhandler_union);
}
/* Check the state of all of our children to see if any are stopped or