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SUMMARY: when there are two symbol has the same address. llvm-objdump -D -symbol-description will select symbol based on the following rule: 1. using Label first if there is a Label symbol. 2. If there is not Label, using a symbol which has Storage Mapping class. 3. if more than one symbol has storage mapping class, put the TC0 has the low priority, for other storage mapping class , compare based on the value. Reviewers: James Henderson ,hubert.reinterpretcast, Differential Revision: https://reviews.llvm.org/D78387
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
//===- MCDisassemblerTest.cpp - Tests for MCDisassembler.cpp --------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCDisassembler/MCDisassembler.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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TEST(MCDisassembler, XCOFFSymbolPriorityTest) {
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SymbolInfoTy SIT1(0x100000, "sym1", None, 1, false);
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SymbolInfoTy SIT2(0x110000, "sym2", None, 2, false);
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SymbolInfoTy SIT3(0x120000, ".func", XCOFF::XMC_PR, 3, true);
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SymbolInfoTy SIT4(0x120000, ".text", XCOFF::XMC_PR, 4, false);
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SymbolInfoTy SIT5(0x130000, "TOC", XCOFF::XMC_TC0, 5, false);
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SymbolInfoTy SIT6(0x130000, "func", XCOFF::XMC_TC, 6, false);
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// Test that higher addresses would appear later than lower ones when symbols
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// are sorted in ascending order.
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EXPECT_TRUE(SIT1 < SIT2);
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EXPECT_FALSE(SIT2 < SIT1);
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// Test that symbols with a StorageMappingClass have higher priority than those
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// without.
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EXPECT_TRUE(SIT2 < SIT5);
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EXPECT_FALSE(SIT5 < SIT2);
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// Test that symbols with a TC0 StorageMappingClass have lower priority than those
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// with some other StorageMappingClass.
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EXPECT_TRUE(SIT5 < SIT6);
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EXPECT_FALSE(SIT6 < SIT5);
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// Test label symbols have higher priorty than non-label symbols.
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EXPECT_TRUE(SIT4 < SIT3);
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EXPECT_FALSE(SIT3 < SIT4);
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// Test symbols comparing with themselves.
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EXPECT_FALSE(SIT1 < SIT1);
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EXPECT_FALSE(SIT2 < SIT2);
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EXPECT_FALSE(SIT3 < SIT3);
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EXPECT_FALSE(SIT4 < SIT4);
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EXPECT_FALSE(SIT5 < SIT5);
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EXPECT_FALSE(SIT6 < SIT6);
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}
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