зеркало из https://github.com/mozilla/pjs.git
Bugzilla bug #34920: use the new PR_GetMemMapAlignment() function to
get the proper alignment of the offset argument to PR_MemMap. Pass 64-bit arguments to PR_CreateFileMap and PR_MemMap.
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75b866de17
Коммит
b7f6e0e190
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@ -327,7 +327,9 @@ PR_IMPLEMENT(PRInt32) PR_EmulateSendFile(
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PRIOVec iov[3];
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PRFileMap *mapHandle = NULL;
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void *addr;
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PRUint32 file_mmap_offset, pagesize;
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PRUint32 file_mmap_offset, alignment;
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PRInt64 zero64;
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PROffset64 file_mmap_offset64;
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PRUint32 addr_offset, mmap_len;
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/* Get file size */
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@ -349,12 +351,12 @@ PR_IMPLEMENT(PRInt32) PR_EmulateSendFile(
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else
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file_bytes = info.size - sfd->file_offset;
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pagesize = PR_GetPageSize();
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alignment = PR_GetMemMapAlignment();
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/*
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* If the file is large, mmap and send the file in chunks so as
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* to not consume too much virtual address space
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*/
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if (!sfd->file_offset || !(sfd->file_offset & (pagesize - 1))) {
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if (!sfd->file_offset || !(sfd->file_offset & (alignment - 1))) {
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/*
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* case 1: page-aligned file offset
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*/
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@ -367,7 +369,7 @@ PR_IMPLEMENT(PRInt32) PR_EmulateSendFile(
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* case 2: non page-aligned file offset
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*/
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/* find previous page boundary */
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file_mmap_offset = (sfd->file_offset & ~(pagesize - 1));
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file_mmap_offset = (sfd->file_offset & ~(alignment - 1));
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/* number of initial bytes to skip in mmap'd segment */
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addr_offset = sfd->file_offset - file_mmap_offset;
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@ -379,12 +381,14 @@ PR_IMPLEMENT(PRInt32) PR_EmulateSendFile(
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* Map in (part of) file. Take care of zero-length files.
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*/
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if (len) {
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mapHandle = PR_CreateFileMap(sfd->fd, 0, PR_PROT_READONLY);
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LL_I2L(zero64, 0);
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mapHandle = PR_CreateFileMap(sfd->fd, zero64, PR_PROT_READONLY);
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if (!mapHandle) {
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count = -1;
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goto done;
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}
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addr = PR_MemMap(mapHandle, file_mmap_offset, mmap_len);
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LL_I2L(file_mmap_offset64, file_mmap_offset);
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addr = PR_MemMap(mapHandle, file_mmap_offset64, mmap_len);
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if (!addr) {
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count = -1;
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goto done;
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@ -435,9 +439,10 @@ PR_IMPLEMENT(PRInt32) PR_EmulateSendFile(
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* Map in (part of) file
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*/
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file_mmap_offset = sfd->file_offset + count - sfd->hlen;
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PR_ASSERT((file_mmap_offset % pagesize) == 0);
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PR_ASSERT((file_mmap_offset % alignment) == 0);
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addr = PR_MemMap(mapHandle, file_mmap_offset, len);
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LL_I2L(file_mmap_offset64, file_mmap_offset);
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addr = PR_MemMap(mapHandle, file_mmap_offset64, len);
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if (!addr) {
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count = -1;
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goto done;
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