From: Sam Clegg <sbc@chromium.org>
Date: Thu, 21 Jan 2021 20:07:43 +0000 (-0800)
Subject: [WebAssembly] Test that invalid symbol/relocation types generate errors
X-Git-Tag: llvmorg-13-init~558
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d75b3719828f3e0c9736476e50a08e5083f90c0b;p=platform%2Fupstream%2Fllvm.git

[WebAssembly] Test that invalid symbol/relocation types generate errors

See https://bugs.llvm.org/show_bug.cgi?id=48827

Differential Revision: https://reviews.llvm.org/D95163
---

diff --git a/llvm/lib/Object/WasmObjectFile.cpp b/llvm/lib/Object/WasmObjectFile.cpp
index a349dde..65adec3 100644
--- a/llvm/lib/Object/WasmObjectFile.cpp
+++ b/llvm/lib/Object/WasmObjectFile.cpp
@@ -693,7 +693,8 @@ Error WasmObjectFile::parseLinkingSectionSymtab(ReadContext &Ctx) {
     }
 
     default:
-      return make_error<GenericBinaryError>("Invalid symbol type",
+      return make_error<GenericBinaryError>("Invalid symbol type: " +
+                                                Twine(unsigned(Info.Kind)),
                                             object_error::parse_failed);
     }
 
@@ -850,14 +851,15 @@ Error WasmObjectFile::parseRelocSection(StringRef Name, ReadContext &Ctx) {
   uint32_t PreviousOffset = 0;
   while (RelocCount--) {
     wasm::WasmRelocation Reloc = {};
-    Reloc.Type = readVaruint32(Ctx);
+    uint32_t type = readVaruint32(Ctx);
+    Reloc.Type = type;
     Reloc.Offset = readVaruint32(Ctx);
     if (Reloc.Offset < PreviousOffset)
       return make_error<GenericBinaryError>("Relocations not in offset order",
                                             object_error::parse_failed);
     PreviousOffset = Reloc.Offset;
     Reloc.Index = readVaruint32(Ctx);
-    switch (Reloc.Type) {
+    switch (type) {
     case wasm::R_WASM_FUNCTION_INDEX_LEB:
     case wasm::R_WASM_TABLE_INDEX_SLEB:
     case wasm::R_WASM_TABLE_INDEX_SLEB64:
@@ -935,9 +937,8 @@ Error WasmObjectFile::parseRelocSection(StringRef Name, ReadContext &Ctx) {
       Reloc.Addend = readVarint32(Ctx);
       break;
     default:
-      return make_error<GenericBinaryError>("Bad relocation type: " +
-                                                Twine(Reloc.Type),
-                                            object_error::parse_failed);
+      return make_error<GenericBinaryError>(
+          "Bad relocation type: " + Twine(type), object_error::parse_failed);
     }
 
     // Relocations must fit inside the section, and must appear in order.  They
diff --git a/llvm/test/Object/Inputs/WASM/bad-reloc-type.wasm b/llvm/test/Object/Inputs/WASM/bad-reloc-type.wasm
new file mode 100644
index 0000000..0f6de0e
Binary files /dev/null and b/llvm/test/Object/Inputs/WASM/bad-reloc-type.wasm differ
diff --git a/llvm/test/Object/Inputs/WASM/bad-symbol-type.wasm b/llvm/test/Object/Inputs/WASM/bad-symbol-type.wasm
new file mode 100644
index 0000000..8c7135f
Binary files /dev/null and b/llvm/test/Object/Inputs/WASM/bad-symbol-type.wasm differ
diff --git a/llvm/test/Object/wasm-bad-reloc-type.test b/llvm/test/Object/wasm-bad-reloc-type.test
new file mode 100644
index 0000000..786532a
--- /dev/null
+++ b/llvm/test/Object/wasm-bad-reloc-type.test
@@ -0,0 +1,3 @@
+RUN: not llvm-objdump -s %p/Inputs/WASM/bad-reloc-type.wasm 2>&1 | FileCheck %s
+
+CHECK: Bad relocation type: 63
diff --git a/llvm/test/Object/wasm-bad-symbol-type.test b/llvm/test/Object/wasm-bad-symbol-type.test
new file mode 100644
index 0000000..06846a1
--- /dev/null
+++ b/llvm/test/Object/wasm-bad-symbol-type.test
@@ -0,0 +1,3 @@
+RUN: not llvm-objdump -s %p/Inputs/WASM/bad-symbol-type.wasm 2>&1 | FileCheck %s
+
+CHECK: Invalid symbol type: 63