[lld] 9d1409d - [lld][WebAssembly] Give better warnings on bad relocation sites
Sam Clegg via llvm-commits
llvm-commits at lists.llvm.org
Fri Oct 30 10:11:15 PDT 2020
Author: Sam Clegg
Date: 2020-10-30T10:11:04-07:00
New Revision: 9d1409df8792ac1200244a1d0eccff81e1b2b70b
URL: https://github.com/llvm/llvm-project/commit/9d1409df8792ac1200244a1d0eccff81e1b2b70b
DIFF: https://github.com/llvm/llvm-project/commit/9d1409df8792ac1200244a1d0eccff81e1b2b70b.diff
LOG: [lld][WebAssembly] Give better warnings on bad relocation sites
Differential Revision: https://reviews.llvm.org/D90443
Added:
lld/test/wasm/bad-reloc.yaml
Modified:
lld/wasm/InputChunks.cpp
Removed:
################################################################################
diff --git a/lld/test/wasm/bad-reloc.yaml b/lld/test/wasm/bad-reloc.yaml
new file mode 100644
index 000000000000..dfab2c606ebe
--- /dev/null
+++ b/lld/test/wasm/bad-reloc.yaml
@@ -0,0 +1,75 @@
+# RUN: yaml2obj %s -o %t.o
+# RUN: not wasm-ld --fatal-warnings -o out.wasm %t.o 2>&1 | FileCheck %s
+#
+# CHECK: bad-reloc.yaml.tmp.o:(_start): unexpected existing value for R_WASM_MEMORY_ADDR_LEB: existing=1 expected=0
+#
+# The code section bellow has been modified such that the target of the
+# relocation is 8180808000 (LEB of 1) rather than 8080808000 (LEB = 0)
+
+--- !WASM
+FileHeader:
+ Version: 0x00000001
+Sections:
+ - Type: TYPE
+ Signatures:
+ - Index: 0
+ ParamTypes: []
+ ReturnTypes:
+ - I32
+ - Type: IMPORT
+ Imports:
+ - Module: env
+ Field: __linear_memory
+ Kind: MEMORY
+ Memory:
+ Initial: 0x00000001
+ - Module: env
+ Field: __indirect_function_table
+ Kind: TABLE
+ Table:
+ Index: 0
+ ElemType: FUNCREF
+ Limits:
+ Initial: 0x00000000
+ - Type: FUNCTION
+ FunctionTypes: [ 0 ]
+ - Type: DATACOUNT
+ Count: 1
+ - Type: CODE
+ Relocations:
+ - Type: R_WASM_MEMORY_ADDR_LEB
+ Index: 1
+ Offset: 0x00000007
+ Functions:
+ - Index: 0
+ Locals: []
+ Body: 4100280281808080002802000B
+ - Type: DATA
+ Segments:
+ - SectionOffset: 6
+ InitFlags: 0
+ Offset:
+ Opcode: I32_CONST
+ Value: 0
+ Content: '00000000'
+ - Type: CUSTOM
+ Name: linking
+ Version: 2
+ SymbolTable:
+ - Index: 0
+ Kind: FUNCTION
+ Name: _start
+ Flags: [ VISIBILITY_HIDDEN ]
+ Function: 0
+ - Index: 1
+ Kind: DATA
+ Name: bar
+ Flags: [ VISIBILITY_HIDDEN ]
+ Segment: 0
+ Size: 4
+ SegmentInfo:
+ - Index: 0
+ Name: .bss.bar
+ Alignment: 2
+ Flags: [ ]
+
diff --git a/lld/wasm/InputChunks.cpp b/lld/wasm/InputChunks.cpp
index 0db4d9d9f584..ddbdb90c44f4 100644
--- a/lld/wasm/InputChunks.cpp
+++ b/lld/wasm/InputChunks.cpp
@@ -109,9 +109,9 @@ void InputChunk::verifyRelocTargets() const {
rel.Type != R_WASM_GLOBAL_INDEX_I32) {
auto expectedValue = file->calcExpectedValue(rel);
if (expectedValue != existingValue)
- warn("unexpected existing value for " + relocTypeToString(rel.Type) +
- ": existing=" + Twine(existingValue) +
- " expected=" + Twine(expectedValue));
+ warn(toString(this) + ": unexpected existing value for " +
+ relocTypeToString(rel.Type) + ": existing=" +
+ Twine(existingValue) + " expected=" + Twine(expectedValue));
}
}
}
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