[PATCH] D112735: export unique symbol list for xcoff with llvm-objdump new option "--export-unique-symbol"

[Digger Lin via Phabricator via llvm-commits]

DiggerLin added a comment.

llvm-nm print out the  "title first" , and then for each symbol, it print out the "symbol address" , "symbol flag" , "symbol name".
for option "--export-unique-symbol" , we do not need to print out the "title" and  "symbol address" ,"symbol flag" for each symbol, instead of we need "symbol visibility" for each symbol.

if we implement the option "--export-unique-symbol" in the llvm-nm. we need to modify the following code in llvm-nm.cpp

1. modify llvm-nm: sortAndPrintSymbolList() to disable printing the "title" , "symbol address" , "symbol flag" and printing "symbol visibility" if there is  option "--export-unique-symbol" .

2. and add a new visibility attribute to

struct NMSymbol  {
}

3. add new compare function to compare (symbol name and symbol visibility")

if we implement the option in ""--export-unique-symbol"  in llvm-objdump.cpp, we only need to add hook to invoke "exportSymbolInfoFromObjectFile()" (the function is implemented in the XCOFFDump.cpp) in llvm-objdump.cpp. 
it is much clear and transparent.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D112735/new/

https://reviews.llvm.org/D112735