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qemu-img: use the heap instead of the huge stack array for win32 

The default stack size of PE is 1MB on win32 and IO_BUF_SIZE in
img_convert() & img_rebase() is 2MB, so qemu-img will crash when doing
"convert" & "rebase" on win32.
Although we can improve the stack size of PE to resolve it, I think we
should avoid using the huge stack variables.

Signed-off-by: TeLeMan <geleman@gmail.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
master
TeLeMan 2010-02-08 16:20:00 +08:00 committed by Anthony Liguori
parent 6265eb26a3
commit d6771bfa52
1 changed files with 11 additions and 3 deletions
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14
qemu-img.c
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@ -577,7 +577,7 @@ static int img_convert(int argc, char **argv)
BlockDriverState **bs, *out_bs;
int64_t total_sectors, nb_sectors, sector_num, bs_offset;
uint64_t bs_sectors;
uint8_t buf[IO_BUF_SIZE];
uint8_t * buf;
const uint8_t *buf1;
BlockDriverInfo bdi;
QEMUOptionParameter *param = NULL;
@ -696,6 +696,7 @@ static int img_convert(int argc, char **argv)
bs_i = 0;
bs_offset = 0;
bdrv_get_geometry(bs[0], &bs_sectors);
buf = qemu_malloc(IO_BUF_SIZE);
if (flags & BLOCK_FLAG_COMPRESS) {
if (bdrv_get_info(out_bs, &bdi) < 0)
@ -828,6 +829,7 @@ static int img_convert(int argc, char **argv)
}
}
}
qemu_free(buf);
bdrv_delete(out_bs);
for (bs_i = 0; bs_i < bs_n; bs_i++)
bdrv_delete(bs[bs_i]);
@ -1184,8 +1186,11 @@ static int img_rebase(int argc, char **argv)
uint64_t num_sectors;
uint64_t sector;
int n, n1;
uint8_t buf_old[IO_BUF_SIZE];
uint8_t buf_new[IO_BUF_SIZE];
uint8_t * buf_old;
uint8_t * buf_new;
buf_old = qemu_malloc(IO_BUF_SIZE);
buf_new = qemu_malloc(IO_BUF_SIZE);
bdrv_get_geometry(bs, &num_sectors);
@ -1232,6 +1237,9 @@ static int img_rebase(int argc, char **argv)
written += pnum;
}
}
qemu_free(buf_old);
qemu_free(buf_new);
}
/*