1 files changed, 153 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/passive-segs-partial-table.js b/js/src/jit-test/tests/wasm/passive-segs-partial-table.js
new file mode 100644
index 0000000000..2d2e8fcf72
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/passive-segs-partial-table.js
@@ -0,0 +1,153 @@
+// Sundry test cases for the "partial write" bounds checking semantics.
+
+// table.init: out of bounds of the table or the element segment, and should
+// not perform the operation at all.
+//
+// Arithmetic overflow of tableoffset + len or of segmentoffset + len should not
+// affect the behavior.
+
+// Note, the length of the element segment is 16.
+const tbl_init_len = 16;
+
+function tbl_init(min, max, backup, write, segoffs=0) {
+    let ins = wasmEvalText(
+        `(module
+           (table (export "tbl") ${min} ${max} funcref)
+           (elem func $f0 $f1 $f2 $f3 $f4 $f5 $f6 $f7 $f8 $f9 $f10 $f11 $f12 $f13 $f14 $f15)
+           (func $f0 (export "f0"))
+           (func $f1 (export "f1"))
+           (func $f2 (export "f2"))
+           (func $f3 (export "f3"))
+           (func $f4 (export "f4"))
+           (func $f5 (export "f5"))
+           (func $f6 (export "f6"))
+           (func $f7 (export "f7"))
+           (func $f8 (export "f8"))
+           (func $f9 (export "f9"))
+           (func $f10 (export "f10"))
+           (func $f11 (export "f11"))
+           (func $f12 (export "f12"))
+           (func $f13 (export "f13"))
+           (func $f14 (export "f14"))
+           (func $f15 (export "f15"))
+           (func (export "run") (param $offs i32) (param $len i32)
+             (table.init 0 (local.get $offs) (i32.const ${segoffs}) (local.get $len))))`);
+    // A fill writing past the end of the table should throw *and* have filled
+    // all the way up to the end.
+    //
+    // A fill reading past the end of the segment should throw *and* have filled
+    // table with as much data as was available.
+    let offs = min - backup;
+    assertErrorMessage(() => ins.exports.run(offs, write),
+                       WebAssembly.RuntimeError,
+                       /index out of bounds/);
+    let tbl = ins.exports.tbl;
+    for (let i=0; i < min; i++) {
+        assertEq(tbl.get(i), null);
+    }
+}
+
+// We exceed the bounds of the table but not of the element segment
+tbl_init(tbl_init_len*2, tbl_init_len*4, Math.floor(tbl_init_len/2), tbl_init_len);
+tbl_init(tbl_init_len*2, tbl_init_len*4, Math.floor(tbl_init_len/2)-1, tbl_init_len);
+
+// We exceed the bounds of the element segment but not the table
+tbl_init(tbl_init_len*10, tbl_init_len*20, tbl_init_len*4, tbl_init_len*2);
+tbl_init(tbl_init_len*10, tbl_init_len*20, tbl_init_len*4-1, tbl_init_len*2-1);
+
+// We arithmetically overflow the table limit but not the segment limit
+tbl_init(tbl_init_len*4, tbl_init_len*4, tbl_init_len, 0xFFFFFFF0);
+
+// We arithmetically overflow the segment limit but not the table limit
+tbl_init(tbl_init_len, tbl_init_len, tbl_init_len, 0xFFFFFFFC, Math.floor(tbl_init_len/2));
+
+// table.copy: out of bounds of the table for the source or target, and should
+// perform the operation at all.  Major cases:
+//
+// - non-overlapping regions
+// - overlapping regions with src > dest
+// - overlapping regions with src == dest
+// - overlapping regions with src < dest
+// - arithmetic overflow on src addresses
+// - arithmetic overflow on target addresses
+//
+// for each of those,
+//
+// - src address oob
+// - target address oob
+// - both oob
+//
+// Note we do not test the multi-table case here because that is part of the
+// reftypes proposal; tests are in the gc/ subdirectory.
+
+const tbl_copy_len = 16;
+
+function tbl_copy(min, max, srcOffs, targetOffs, len) {
+    let ins = wasmEvalText(
+        `(module
+           (table (export "tbl") ${min} ${max} funcref)
+           (func $f0 (export "f0"))
+           (func $f1 (export "f1"))
+           (func $f2 (export "f2"))
+           (func $f3 (export "f3"))
+           (func $f4 (export "f4"))
+           (func $f5 (export "f5"))
+           (func $f6 (export "f6"))
+           (func $f7 (export "f7"))
+           (func $f8 (export "f8"))
+           (func $f9 (export "f9"))
+           (func $f10 (export "f10"))
+           (func $f11 (export "f11"))
+           (func $f12 (export "f12"))
+           (func $f13 (export "f13"))
+           (func $f14 (export "f14"))
+           (func $f15 (export "f15"))
+           (func (export "run") (param $targetOffs i32) (param $srcOffs i32) (param $len i32)
+             (table.copy (local.get $targetOffs) (local.get $srcOffs) (local.get $len))))`);
+
+    let tbl = ins.exports.tbl;
+
+    let copyDown = srcOffs < targetOffs;
+    let targetAvail = tbl.length - targetOffs;
+    let srcAvail = tbl.length - srcOffs;
+    let srcLim = srcOffs + Math.min(len, targetAvail, srcAvail);
+
+    for (let i=srcOffs, j=0; i < srcLim; i++, j++)
+        tbl.set(i, ins.exports["f" + j]);
+    assertErrorMessage(() => ins.exports.run(targetOffs, srcOffs, len),
+                       WebAssembly.RuntimeError,
+                       /index out of bounds/);
+
+    for (var i=0, s=0; i < tbl.length; i++ ) {
+        if (i >= srcOffs && i < srcLim) {
+            assertEq(tbl.get(i), ins.exports["f" + (s++)]);
+            continue;
+        }
+        assertEq(tbl.get(i), null);
+    }
+}
+
+// OOB target address, nonoverlapping
+tbl_copy(tbl_copy_len*2, tbl_copy_len*4, 0, Math.floor(1.5*tbl_copy_len), tbl_copy_len);
+tbl_copy(tbl_copy_len*2, tbl_copy_len*4, 0, Math.floor(1.5*tbl_copy_len)-1, tbl_copy_len-1);
+
+// OOB source address, nonoverlapping
+tbl_copy(tbl_copy_len*2, tbl_copy_len*4, Math.floor(1.5*tbl_copy_len), 0, tbl_copy_len);
+tbl_copy(tbl_copy_len*2, tbl_copy_len*4, Math.floor(1.5*tbl_copy_len)-1, 0, tbl_copy_len-1);
+
+// OOB target address, overlapping, src < target
+tbl_copy(tbl_copy_len*2, tbl_copy_len*4, tbl_copy_len-5, Math.floor(1.5*tbl_copy_len), tbl_copy_len);
+
+// OOB source address, overlapping, target < src
+tbl_copy(tbl_copy_len*2, tbl_copy_len*4, Math.floor(1.5*tbl_copy_len), tbl_copy_len-5, tbl_copy_len);
+
+// OOB both, overlapping, including src == target
+tbl_copy(tbl_copy_len*2, tbl_copy_len*4, tbl_copy_len+5, Math.floor(1.5*tbl_copy_len), tbl_copy_len);
+tbl_copy(tbl_copy_len*2, tbl_copy_len*4, Math.floor(1.5*tbl_copy_len), tbl_copy_len+5, tbl_copy_len);
+tbl_copy(tbl_copy_len*2, tbl_copy_len*4, tbl_copy_len+5, tbl_copy_len+5, tbl_copy_len);
+
+// Arithmetic overflow on source address.
+tbl_copy(tbl_copy_len*8, tbl_copy_len*8, tbl_copy_len*7, 0, 0xFFFFFFE0);
+
+// Arithmetic overflow on target adddress is an overlapping case.
+tbl_copy(tbl_copy_len*8, tbl_copy_len*8, 0, tbl_copy_len*7, 0xFFFFFFE0);