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* child_info.h: Bump magic number.

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(class child_info): Add an element.
* cygheap.cc (init_cheap): Allocate cygwin heap in shared memory area.
(cygheap_fixup_in_child): Map cygwin heap, passed from parent via shared memory
into correct address.
(cygheap_setup_for_child): New function.
* cygheap.h: Declare new functions.
* dcrt0.cc (dll_crt0_1): Accomodate new cygheap_fixup_in_child arguments.
Avoid protecting subproc_ready unless it is spawn/nowait.
* fork.cc (fork_parent): Use new cygheap_setup_for_child function to setup
cygwin heap info.  Close passed cygheap shared memory handle.
* spawn.cc (spawn_guts): Ditto.  Also, reorganize to avoid synchronization
between parent and child in non-P_OVERLAY case.
* sigproc.cc (wait_sig): Only signal subproc_ready when execing.
This commit is contained in:
Christopher Faylor
2001-07-17 03:41:52 +00:00
parent 30640285c3
commit 5457dfcb81
9 changed files with 180 additions and 132 deletions
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9
winsup/cygwin/dcrt0.cc
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@@ -669,13 +669,11 @@ dll_crt0_1 ()
if (child_proc_info)
{
cygheap = child_proc_info->cygheap;
cygheap_max = child_proc_info->cygheap_max;
switch (child_proc_info->type)
{
case PROC_FORK:
case PROC_FORK1:
cygheap_fixup_in_child (child_proc_info->parent, 0);
cygheap_fixup_in_child (child_proc_info, 0);
alloc_stack (fork_info);
set_myself (mypid);
user_data->heaptop = child_proc_info->heaptop;
@@ -690,7 +688,7 @@ dll_crt0_1 ()
hexec_proc = spawn_info->hexec_proc;
around:
HANDLE h;
cygheap_fixup_in_child (spawn_info->parent, 1);
cygheap_fixup_in_child (spawn_info, 1);
if (!spawn_info->moreinfo->myself_pinfo ||
!DuplicateHandle (hMainProc, spawn_info->moreinfo->myself_pinfo,
hMainProc, &h, 0, 0,
@@ -709,7 +707,8 @@ dll_crt0_1 ()
old_title = strcpy (title_buf, spawn_info->moreinfo->old_title);
cfree (spawn_info->moreinfo->old_title);
}
ProtectHandle (child_proc_info->subproc_ready);
if (child_proc_info->subproc_ready)
ProtectHandle (child_proc_info->subproc_ready);
myself->uid = spawn_info->moreinfo->uid;
if (myself->uid == USHRT_MAX)
cygheap->user.set_sid (NULL);