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author | Lukas Larsson <lukas@erlang-solutions.com> | 2013-08-12 16:04:31 +0200 |
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committer | Lukas Larsson <lukas@erlang-solutions.com> | 2013-08-13 08:46:01 +0200 |
commit | 9f3dc09c1a70bd485b211768bedf989bed7fbf21 (patch) | |
tree | 0e6b737339202bf1ed272ec40e3a6b8d3d1e58e6 | |
parent | 01a13c00f67112e7996e45439d4eec9e6aa414ce (diff) | |
download | otp-9f3dc09c1a70bd485b211768bedf989bed7fbf21.tar.gz otp-9f3dc09c1a70bd485b211768bedf989bed7fbf21.tar.bz2 otp-9f3dc09c1a70bd485b211768bedf989bed7fbf21.zip |
erts: Refactor non-pure macros to functions
This is needed as some gcc versions seems to optimize this undefined
behaviour in a way which breaks this code.
-rw-r--r-- | erts/emulator/drivers/common/efile_drv.c | 100 |
1 files changed, 61 insertions, 39 deletions
diff --git a/erts/emulator/drivers/common/efile_drv.c b/erts/emulator/drivers/common/efile_drv.c index 595b0488a8..edcb56de1d 100644 --- a/erts/emulator/drivers/common/efile_drv.c +++ b/erts/emulator/drivers/common/efile_drv.c @@ -546,53 +546,75 @@ static void *ef_safe_realloc(void *op, Uint s) (((char *)(ev)->iov[(q)].iov_base) + (p)) /* int EV_GET_CHAR(ErlIOVec *ev, char *p, int *pp, int *qp) */ -#define EV_GET_CHAR(ev, p, pp, qp) \ - (*(pp)+1 <= (ev)->iov[*(qp)].iov_len \ - ? (*(p) = *EV_CHAR_P(ev, *(pp), *(qp)), \ - *(pp) = ( *(pp)+1 < (ev)->iov[*(qp)].iov_len \ - ? *(pp)+1 \ - : ((*(qp))++, 0)), \ - !0) \ - : 0) +#define EV_GET_CHAR(ev, p, pp, qp) efile_ev_get_char(ev, p ,pp, qp) +static int +efile_ev_get_char(ErlIOVec *ev, char *p, int *pp, int *qp) { + if (*(pp)+1 <= (ev)->iov[*(qp)].iov_len) { + *(p) = *EV_CHAR_P(ev, *(pp), *(qp)); + if (*(pp)+1 < (ev)->iov[*(qp)].iov_len) + *(pp) = *(pp)+1; + else + (*(qp))++; + return !0; + } + return 0; +} /* Uint32 EV_UINT32(ErlIOVec *ev, int p, int q)*/ #define EV_UINT32(ev, p, q) \ ((Uint32) *(((unsigned char *)(ev)->iov[(q)].iov_base) + (p))) /* int EV_GET_UINT32(ErlIOVec *ev, Uint32 *p, int *pp, int *qp) */ -#define EV_GET_UINT32(ev, p, pp, qp) \ - (*(pp)+4 <= (ev)->iov[*(qp)].iov_len \ - ? (*(p) = (EV_UINT32(ev, *(pp), *(qp)) << 24) \ - | (EV_UINT32(ev, *(pp)+1, *(qp)) << 16) \ - | (EV_UINT32(ev, *(pp)+2, *(qp)) << 8) \ - | (EV_UINT32(ev, *(pp)+3, *(qp))), \ - *(pp) = ( *(pp)+4 < (ev)->iov[*(qp)].iov_len \ - ? *(pp)+4 \ - : ((*(qp))++, 0)), \ - !0) \ - : 0) +#define EV_GET_UINT32(ev, p, pp, qp) efile_ev_get_uint32(ev,p,pp,qp) +static int +efile_ev_get_uint32(ErlIOVec *ev, Uint32 *p, int *pp, int *qp) { + if (*(pp)+4 <= (ev)->iov[*(qp)].iov_len) { + *(p) = (EV_UINT32(ev, *(pp), *(qp)) << 24) + | (EV_UINT32(ev, *(pp)+1, *(qp)) << 16) + | (EV_UINT32(ev, *(pp)+2, *(qp)) << 8) + | (EV_UINT32(ev, *(pp)+3, *(qp))); + if (*(pp)+4 < (ev)->iov[*(qp)].iov_len) + *(pp) = *(pp)+4; + else + (*(qp))++; + return !0; + } + return 0; +} /* Uint64 EV_UINT64(ErlIOVec *ev, int p, int q)*/ #define EV_UINT64(ev, p, q) \ ((Uint64) *(((unsigned char *)(ev)->iov[(q)].iov_base) + (p))) -/* int EV_GET_UINT64(ErlIOVec *ev, Uint32 *p, int *pp, int *qp) */ -#define EV_GET_UINT64(ev, p, pp, qp) \ - (*(pp)+8 <= (ev)->iov[*(qp)].iov_len \ - ? (*(p) = (EV_UINT64(ev, *(pp), *(qp)) << 56) \ - | (EV_UINT64(ev, *(pp)+1, *(qp)) << 48) \ - | (EV_UINT64(ev, *(pp)+2, *(qp)) << 40) \ - | (EV_UINT64(ev, *(pp)+3, *(qp)) << 32) \ - | (EV_UINT64(ev, *(pp)+4, *(qp)) << 24) \ - | (EV_UINT64(ev, *(pp)+5, *(qp)) << 16) \ - | (EV_UINT64(ev, *(pp)+6, *(qp)) << 8) \ - | (EV_UINT64(ev, *(pp)+7, *(qp))), \ - *(pp) = ( *(pp)+8 < (ev)->iov[*(qp)].iov_len \ - ? *(pp)+8 \ - : ((*(qp))++, 0)), \ - !0) \ - : 0) +/* int EV_GET_UINT64(ErlIOVec *ev, Uint64 *p, int *pp, int *qp) */ +#define EV_GET_UINT64(ev, p, pp, qp) efile_ev_get_uint64(ev,p,pp,qp) +static int +efile_ev_get_uint64(ErlIOVec *ev, Uint64 *p, int *pp, int *qp) { + if (*(pp)+8 <= (ev)->iov[*(qp)].iov_len) { + *(p) = (EV_UINT64(ev, *(pp), *(qp)) << 56) + | (EV_UINT64(ev, *(pp)+1, *(qp)) << 48) + | (EV_UINT64(ev, *(pp)+2, *(qp)) << 40) + | (EV_UINT64(ev, *(pp)+3, *(qp)) << 32) + | (EV_UINT64(ev, *(pp)+4, *(qp)) << 24) + | (EV_UINT64(ev, *(pp)+5, *(qp)) << 16) + | (EV_UINT64(ev, *(pp)+6, *(qp)) << 8) + | (EV_UINT64(ev, *(pp)+7, *(qp))); + if (*(pp)+8 < (ev)->iov[*(qp)].iov_len) + *(pp) = *(pp)+8; + else + (*(qp))++; + return !0; + } + return 0; +} +/* int EV_GET_SINT64(ErlIOVec *ev, Uint64 *p, int *pp, int *qp) */ +#define EV_GET_SINT64(ev, p, pp, qp) efile_ev_get_sint64(ev,p,pp,qp) +static int +efile_ev_get_sint64(ErlIOVec *ev, Sint64 *p, int *pp, int *qp) { + Uint64 *tmp = (Uint64*)p; + return EV_GET_UINT64(ev,tmp,pp,qp); +} #if 0 @@ -3604,7 +3626,7 @@ file_outputv(ErlDrvData e, ErlIOVec *ev) { for(i = 0; i < n; i++) { Uint32 sizeH, sizeL; size_t size; - if ( !EV_GET_UINT64(ev, &d->c.pwritev.specs[i].offset, &p, &q) + if ( !EV_GET_SINT64(ev, &d->c.pwritev.specs[i].offset, &p, &q) || !EV_GET_UINT32(ev, &sizeH, &p, &q) || !EV_GET_UINT32(ev, &sizeL, &p, &q)) { /* Misalignment in buffer */ @@ -3746,7 +3768,7 @@ file_outputv(ErlDrvData e, ErlIOVec *ev) { for (i = 1; i < 1+n; i++) { Uint32 sizeH, sizeL; size_t size; - if ( !EV_GET_UINT64(ev, &d->c.preadv.offsets[i-1], &p, &q) + if ( !EV_GET_SINT64(ev, &d->c.preadv.offsets[i-1], &p, &q) || !EV_GET_UINT32(ev, &sizeH, &p, &q) || !EV_GET_UINT32(ev, &sizeL, &p, &q)) { reply_posix_error(desc, EINVAL); @@ -3814,7 +3836,7 @@ file_outputv(ErlDrvData e, ErlIOVec *ev) { Uint32 origin; /* Origin of seek. */ if (ev->size < 1+8+4 - || !EV_GET_UINT64(ev, &offset, &p, &q) + || !EV_GET_SINT64(ev, &offset, &p, &q) || !EV_GET_UINT32(ev, &origin, &p, &q)) { /* Wrong length of buffer to contain offset and origin */ reply_posix_error(desc, EINVAL); @@ -3927,7 +3949,7 @@ file_outputv(ErlDrvData e, ErlIOVec *ev) { goto done; } if (ev->size < 1+1+8+4 - || !EV_GET_UINT64(ev, &hdr_offset, &p, &q) + || !EV_GET_SINT64(ev, &hdr_offset, &p, &q) || !EV_GET_UINT32(ev, &max_size, &p, &q)) { /* Buffer too short to contain * the header offset and max size spec */ |