X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Frts%2FMBlock.c;h=a8f34e8cfed9b80261490f60ce93ea15c9851a3f;hb=354f17ec86e2e11f2e77a159916b2e7be74979c9;hp=5d83dc9081b91e2653031731f22dce6664eeba32;hpb=080412448d00216ab747c7372f07c9b68c8c235c;p=ghc-hetmet.git diff --git a/ghc/rts/MBlock.c b/ghc/rts/MBlock.c index 5d83dc9..a8f34e8 100644 --- a/ghc/rts/MBlock.c +++ b/ghc/rts/MBlock.c @@ -1,5 +1,7 @@ /* ----------------------------------------------------------------------------- - * $Id: MBlock.c,v 1.7 1999/01/25 11:55:06 sof Exp $ + * $Id: MBlock.c,v 1.26 2002/01/08 16:38:27 sof Exp $ + * + * (c) The GHC Team 1998-1999 * * MegaBlock Allocator Interface. This file contains all the dirty * architecture-dependent hackery required to get a chunk of aligned @@ -7,7 +9,8 @@ * * ---------------------------------------------------------------------------*/ -#define NON_POSIX_SOURCE +/* This is non-posix compliant. */ +/* #include "PosixSource.h" */ #include "Rts.h" #include "RtsUtils.h" @@ -23,47 +26,20 @@ #include #endif -#ifdef HAVE_SYS_MMAN_H -#include +#ifndef mingw32_TARGET_OS +# ifdef HAVE_SYS_MMAN_H +# include +# endif #endif #ifdef HAVE_FCNTL_H #include #endif -#if cygwin32_TARGET_OS +#if HAVE_WINDOWS_H #include #endif -#if freebsd2_TARGET_OS || freebsd3_TARGET_OS -/* Executable is loaded from 0x0 - * Shared libraries are loaded at 0x2000000 - * Stack is at the top of the address space. The kernel probably owns - * 0x8000000 onwards, so we'll pick 0x5000000. - */ -#define ASK_FOR_MEM_AT 0x50000000 - -#elif linux_TARGET_OS -/* Any ideas? - */ -#define ASK_FOR_MEM_AT 0x50000000 - -#elif solaris2_TARGET_OS -/* guess */ -#define ASK_FOR_MEM_AT 0x50000000 - -#elif osf3_TARGET_OS -/* guess */ -#define ASK_FOR_MEM_AT 0x50000000 - -#elif _WIN32 -/* doesn't matter, we use a reserve/commit algorithm */ - -#else -#error Dont know where to get memory from on this architecture -/* ToDo: memory locations on other architectures */ -#endif - lnat mblocks_allocated = 0; void * @@ -73,11 +49,10 @@ getMBlock(void) } #ifndef _WIN32 - void * getMBlocks(nat n) { - static caddr_t next_request = (caddr_t)ASK_FOR_MEM_AT; + static caddr_t next_request = (caddr_t)HEAP_BASE; caddr_t ret; lnat size = MBLOCK_SIZE * n; @@ -88,6 +63,12 @@ getMBlocks(nat n) MAP_FIXED | MAP_PRIVATE, fd, 0); close(fd); } +#elif hpux_TARGET_OS + ret = mmap(next_request, size, PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); +#elif darwin_TARGET_OS + ret = mmap(next_request, size, PROT_READ | PROT_WRITE, + MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0); #else ret = mmap(next_request, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); @@ -102,10 +83,10 @@ getMBlocks(nat n) } if (((W_)ret & MBLOCK_MASK) != 0) { - barf("GetMBlock: misaligned block returned"); + barf("GetMBlock: misaligned block %p returned when allocating %d megablock(s) at %p", ret, n, next_request); } - IF_DEBUG(gc,fprintf(stderr,"Allocated %d megablock(s) at %x\n",n,(nat)ret)); + IF_DEBUG(gc,fprintf(stderr,"Allocated %d megablock(s) at %p\n",n,ret)); next_request += size; @@ -120,55 +101,73 @@ getMBlocks(nat n) On Win32 platforms we make use of the two-phased virtual memory API to allocate mega blocks. We proceed as follows: - Reserve a large chunk of VM (128M at the time), but don't supply a - base address that's aligned on a MB boundary. Instead we round up to the - nearest from the chunk of VM we're given back from the OS (at the - moment we just leave the 'slop' at the beginning of the reserved - chunk unused - ToDo: reuse it .) + Reserve a large chunk of VM (256M at the time, or what the user asked + for via the -M option), but don't supply a base address that's aligned on + a MB boundary. Instead we round up to the nearest mblock from the chunk of + VM we're handed back from the OS (at the moment we just leave the 'slop' at + the beginning of the reserved chunk unused - ToDo: reuse it .) Reserving memory doesn't allocate physical storage (not even in the - page file), this is done by committing pages (or mega-blocks in + page file), this is done later on by committing pages (or mega-blocks in our case). - */ +char* base_non_committed = (char*)0; +char* end_non_committed = (char*)0; + +/* Default is to reserve 256M of VM to minimise the slop cost. */ +#define SIZE_RESERVED_POOL ( 256 * 1024 * 1024 ) + +/* Number of bytes reserved */ +static unsigned long size_reserved_pool = SIZE_RESERVED_POOL; + +/* This predicate should be inlined, really. */ +/* TODO: this only works for a single chunk */ +int +is_heap_alloced(const void* x) +{ + return (((char*)(x) >= base_non_committed) && + ((char*)(x) <= end_non_committed)); +} + void * getMBlocks(nat n) { - static char* base_non_committed = (char*)0; static char* base_mblocks = (char*)0; static char* next_request = (char*)0; void* ret = (void*)0; lnat size = MBLOCK_SIZE * n; - - /* Reserve VM 128M at the time to try to minimise the slop cost. */ -#define SIZE_RESERVED_POOL ( 128 * 1024 * 1024 ) - - if ( (base_non_committed == 0) || - (next_request + size > base_non_committed + SIZE_RESERVED_POOL) ) { + + if ( (base_non_committed == 0) || (next_request + size > end_non_committed) ) { + if (base_non_committed) { + barf("RTS exhausted max heap size (%d bytes)\n", size_reserved_pool); + } + if (RtsFlags.GcFlags.maxHeapSize != 0) { + size_reserved_pool = BLOCK_SIZE * RtsFlags.GcFlags.maxHeapSize; + if (size_reserved_pool < MBLOCK_SIZE) { + size_reserved_pool = 2*MBLOCK_SIZE; + } + } base_non_committed = VirtualAlloc ( NULL - , SIZE_RESERVED_POOL + , size_reserved_pool , MEM_RESERVE , PAGE_READWRITE ); if ( base_non_committed == 0 ) { -# ifdef DEBUG - fprintf(stderr, "getMBlocks: VirtualAlloc failed with: %d\n", GetLastError()); -# endif + fprintf(stderr, "getMBlocks: VirtualAlloc failed with: %ld\n", GetLastError()); ret=(void*)-1; } else { - /* The returned pointer is not aligned on a mega-block boundary. Make it. */ - base_mblocks = (char*)((unsigned)base_non_committed & (unsigned)0xfff00000) + 0x100000; -# if 0 - fprintf(stderr, "Dropping %d bytes off of 128M chunk\n", + end_non_committed = (char*)base_non_committed + (unsigned long)size_reserved_pool; + /* The returned pointer is not aligned on a mega-block boundary. Make it. */ + base_mblocks = (char*)((unsigned long)base_non_committed & (unsigned long)0xfff00000) + MBLOCK_SIZE; +# if 0 + fprintf(stderr, "getMBlocks: Dropping %d bytes off of 256M chunk\n", (unsigned)base_mblocks - (unsigned)base_non_committed); -# endif +# endif - if ( ((char*)base_mblocks + size) > ((char*)base_non_committed + SIZE_RESERVED_POOL) ) { -# ifdef DEBUG - fprintf(stderr, "oops, committed too small a region to start with."); -# endif + if ( ((char*)base_mblocks + size) > end_non_committed ) { + fprintf(stderr, "getMBlocks: oops, committed too small a region to start with."); ret=(void*)-1; } else { next_request = base_mblocks; @@ -179,19 +178,20 @@ getMBlocks(nat n) if ( ret != (void*)-1 ) { ret = VirtualAlloc(next_request, size, MEM_COMMIT, PAGE_READWRITE); if (ret == NULL) { -# ifdef DEBUG - fprintf(stderr, "getMBlocks: VirtualAlloc failed with: %d\n", GetLastError()); -# endif + fprintf(stderr, "getMBlocks: VirtualAlloc failed with: %ld\n", GetLastError()); ret=(void*)-1; } } if (((W_)ret & MBLOCK_MASK) != 0) { - barf("GetMBlock: misaligned block returned"); + barf("getMBlocks: misaligned block returned"); } - IF_DEBUG(gc,fprintf(stderr,"Allocated %d megablock(s) at %x\n",n,(nat)ret)); + if (ret == (void*)-1) { + barf("getMBlocks: unknown memory allocation failure on Win32."); + } + IF_DEBUG(gc,fprintf(stderr,"Allocated %d megablock(s) at 0x%x\n",n,(nat)ret)); next_request = (char*)next_request + size; mblocks_allocated += n; @@ -214,9 +214,9 @@ freeMBlock(void* p, nat n) rc = VirtualFree(p, n * MBLOCK_SIZE , MEM_DECOMMIT ); if (rc == FALSE) { -# ifdef DEBUG +# ifdef DEBUG fprintf(stderr, "freeMBlocks: VirtualFree failed with: %d\n", GetLastError()); -# endif +# endif } }