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authorSverker Eriksson <[email protected]>2017-01-17 15:12:17 +0100
committerSverker Eriksson <[email protected]>2017-01-17 15:12:17 +0100
commitc3fe109d6f631fde600676db7e27209fe12911c1 (patch)
tree4f611a7f84802eaadeb82fb6055923db1d2da8c6 /erts
parentc60394a8ef642f8533fa26b0bc3d1dcb217c8866 (diff)
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erts: Fix zlib crash on mac for inflateGetDictionary
Work around broken build system by checking actual zlib version in runtime.
Diffstat (limited to 'erts')
-rw-r--r--erts/emulator/drivers/common/zlib_drv.c46
1 files changed, 37 insertions, 9 deletions
diff --git a/erts/emulator/drivers/common/zlib_drv.c b/erts/emulator/drivers/common/zlib_drv.c
index 066cf87c9d..e8afddb01b 100644
--- a/erts/emulator/drivers/common/zlib_drv.c
+++ b/erts/emulator/drivers/common/zlib_drv.c
@@ -252,9 +252,9 @@ static int zlib_output(ZLibData* d)
return zlib_output_init(d);
}
-#ifdef HAVE_ZLIB_INFLATEGETDICTIONARY
static int zlib_inflate_get_dictionary(ZLibData* d)
{
+#ifdef HAVE_ZLIB_INFLATEGETDICTIONARY
ErlDrvBinary* dbin = driver_alloc_binary(INFL_DICT_SZ);
uInt dlen = 0;
int res = inflateGetDictionary(&d->s, (unsigned char*)dbin->orig_bytes, &dlen);
@@ -263,8 +263,11 @@ static int zlib_inflate_get_dictionary(ZLibData* d)
}
driver_free_binary(dbin);
return res;
-}
+#else
+ abort(); /* never called, just to silence 'unresolved symbol'
+ for non-optimizing compiler */
#endif
+}
static int zlib_inflate(ZLibData* d, int flush)
{
@@ -448,10 +451,35 @@ static void zlib_free(void* data, void* addr)
driver_free(addr);
}
+#if defined(__APPLE__) && defined(__MACH__) && defined(HAVE_ZLIB_INFLATEGETDICTIONARY)
+
+/* Work around broken build system with runtime version test */
+static int have_inflateGetDictionary;
+
+static int zlib_init()
+{
+ unsigned int v[4] = {0, 0, 0, 0};
+ unsigned hexver;
+
+ sscanf(zlibVersion(), "%u.%u.%u.%u", &v[0], &v[1], &v[2], &v[3]);
+
+ hexver = (v[0] << (8*3)) | (v[1] << (8*2)) | (v[2] << (8)) | v[3];
+
+ have_inflateGetDictionary = (hexver >= 0x1020701); /* 1.2.7.1 */
+
+ return 0;
+}
+#else /* trust configure got it right */
+# ifdef HAVE_ZLIB_INFLATEGETDICTIONARY
+# define have_inflateGetDictionary 1
+# else
+# define have_inflateGetDictionary 0
+# endif
static int zlib_init()
{
return 0;
}
+#endif
static ErlDrvData zlib_start(ErlDrvPort port, char* buf)
{
@@ -605,14 +633,14 @@ static ErlDrvSSizeT zlib_ctl(ErlDrvData drv_data, unsigned int command, char *bu
return zlib_return(res, rbuf, rlen);
case INFLATE_GETDICT:
-#ifdef HAVE_ZLIB_INFLATEGETDICTIONARY
- if (d->state != ST_INFLATE) goto badarg;
- res = zlib_inflate_get_dictionary(d);
+ if (have_inflateGetDictionary) {
+ if (d->state != ST_INFLATE) goto badarg;
+ res = zlib_inflate_get_dictionary(d);
+ } else {
+ errno = ENOTSUP;
+ res = Z_ERRNO;
+ }
return zlib_return(res, rbuf, rlen);
-#else
- errno = ENOTSUP;
- return zlib_return(Z_ERRNO, rbuf, rlen);
-#endif
case INFLATE_SYNC:
if (d->state != ST_INFLATE) goto badarg;