* cygheap.h (init_cygheap): New struct holding values that live in the Cygwin
heap. * child_info.h (child_info): Change pointer type of cygheap to init_cygheap. * cygheap.cc (init_cheap): Point cygheap_max after contents of cygheap. Move some stuff into cygheap.h. * dir.cc (opendir): Change to use root and rootlen in cygheap rather than in myself. (mkdir): Change to use umask in cygheap rather than in myself. * path.cc: Ditto, throughout. * syscalls.cc (_open): Ditto. Change to use umask in cygheap rather than in myself. (chroot): Change to allocate root dir on the cygwin heap. (umask): Change to use umask in cygheap rather than in myself. (cygwin_bind): Ditto. * sigproc.cc (proc_subproc): Don't copy umask or root stuff as this happens automatically now. * pinfo.h (_pinfo): Migrate stuff out of here and into init_cheap. * dcrt0.cc (dll_crt0_1): Call cygheap_init later in startup for first cygwin process.
This commit is contained in:
@ -18,24 +18,18 @@
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#include "cygerrno.h"
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#include "sync.h"
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void NO_COPY *cygheap = NULL;
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init_cygheap NO_COPY *cygheap;
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void NO_COPY *cygheap_max = NULL;
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static NO_COPY muto *cygheap_protect = NULL;
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extern "C" void __stdcall
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cygheap_init ()
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{
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cygheap_protect = new_muto (FALSE, "cygheap_protect");
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}
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inline static void
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init_cheap ()
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{
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cygheap = VirtualAlloc (NULL, CYGHEAPSIZE, MEM_RESERVE, PAGE_NOACCESS);
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cygheap = (init_cygheap *) VirtualAlloc (NULL, CYGHEAPSIZE, MEM_RESERVE, PAGE_NOACCESS);
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if (!cygheap)
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api_fatal ("Couldn't reserve space for cygwin's heap, %E");
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cygheap_max = (((char **) cygheap) + 1);
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cygheap_max = cygheap + 1;
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}
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#define pagetrunc(x) ((void *) (((DWORD) (x)) & ~(4096 - 1)))
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@ -60,32 +54,26 @@ _csbrk (int sbs)
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if (!needalloc)
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needalloc = sbs && ((heapalign == lastheap) || heapalign != pagetrunc (cygheap_max));
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if (needalloc && !VirtualAlloc (lastheap, (DWORD) sbs, MEM_COMMIT, PAGE_READWRITE))
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if (needalloc && !VirtualAlloc (lastheap, (DWORD) sbs ?: 1, MEM_COMMIT, PAGE_READWRITE))
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api_fatal ("couldn't commit memory for cygwin heap, %E");
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return lastheap;
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}
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extern "C" void __stdcall
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cygheap_init ()
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{
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cygheap_protect = new_muto (FALSE, "cygheap_protect");
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_csbrk (0);
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}
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/* Copyright (C) 1997, 2000 DJ Delorie */
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#define NBUCKETS 32
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char *buckets[NBUCKETS] = {0};
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struct _cmalloc_entry
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{
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union
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{
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DWORD b;
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char *ptr;
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};
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struct _cmalloc_entry *prev;
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char data[0];
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};
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#define N0 ((_cmalloc_entry *) NULL)
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#define to_cmalloc(s) ((_cmalloc_entry *) (((char *) (s)) - (int) (N0->data)))
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#define cygheap_chain ((_cmalloc_entry **)cygheap)
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static void *_cmalloc (int size) __attribute ((regparm(1)));
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static void *__stdcall _crealloc (void *ptr, int size) __attribute ((regparm(2)));
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@ -113,8 +101,8 @@ _cmalloc (int size)
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rvc = (_cmalloc_entry *) _csbrk (size);
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rvc->b = b;
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rvc->prev = *cygheap_chain;
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*cygheap_chain = rvc;
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rvc->prev = cygheap->chain;
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cygheap->chain = rvc;
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}
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cygheap_protect->release ();
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return rvc->data;
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@ -172,7 +160,7 @@ cygheap_fixup_in_child (HANDLE parent, bool execed)
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/* Reserve cygwin heap in same spot as parent */
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if (!VirtualAlloc (cygheap, CYGHEAPSIZE, MEM_RESERVE, PAGE_NOACCESS))
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api_fatal ("Couldn't reserve space for cygwin's heap in child, %E");
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api_fatal ("Couldn't reserve space for cygwin's heap (%p) in child, cygheap, %E", cygheap);
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/* Allocate same amount of memory as parent */
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if (!VirtualAlloc (cygheap, n, MEM_COMMIT, PAGE_READWRITE))
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@ -185,20 +173,22 @@ cygheap_fixup_in_child (HANDLE parent, bool execed)
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api_fatal ("Couldn't read parent's cygwin heap %d bytes != %d, %E",
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n, m);
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if (!execed)
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return; /* Forked. Nothing extra to do. */
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cygheap_init ();
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/* Walk the allocated memory chain looking for orphaned memory from
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previous execs */
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for (_cmalloc_entry *rvc = *cygheap_chain; rvc; rvc = rvc->prev)
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if (execed)
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{
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cygheap_entry *ce = (cygheap_entry *) rvc->data;
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if (rvc->b >= NBUCKETS || ce->type <= HEAP_1_START)
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continue;
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else if (ce->type < HEAP_1_MAX)
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ce->type += HEAP_1_MAX; /* Mark for freeing after next exec */
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else
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_cfree (ce); /* Marked by parent for freeing in child */
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/* Walk the allocated memory chain looking for orphaned memory from
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previous execs */
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for (_cmalloc_entry *rvc = cygheap->chain; rvc; rvc = rvc->prev)
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{
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cygheap_entry *ce = (cygheap_entry *) rvc->data;
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if (rvc->b >= NBUCKETS || ce->type <= HEAP_1_START)
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continue;
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else if (ce->type < HEAP_1_MAX)
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ce->type += HEAP_1_MAX; /* Mark for freeing after next exec */
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else
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_cfree (ce); /* Marked by parent for freeing in child */
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}
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}
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}
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