maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[llvm-size] Implement --common option 

Differential Revision: http://reviews.llvm.org/D16820

llvm-svn: 264591
This commit is contained in:
Hemant Kulkarni 2016-03-28 16:48:10 +00:00
parent 088a726f6f
commit 274457e5e8
2 changed files with 54 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
llvm/test/tools/llvm-size/X86/test-common.s Normal file
View File

@ -0,0 +1,29 @@
// #Check that with common switch commons are added to bss or
// #Shown as *COM* otherwise their size is discounted
// RUN: llvm-mc %s -o %t.o -filetype=obj -triple=x86_64-pc-linux
// RUN: llvm-size -A -common %t.o | FileCheck --check-prefix="SYSV" %s
// RUN: llvm-size -B -common %t.o| FileCheck --check-prefix="BSD" %s
// RUN: llvm-size -A %t.o | FileCheck --check-prefix="SYSVNOCOMM" %s
// RUN: llvm-size -B %t.o| FileCheck --check-prefix="BSDNOCOMM" %s
.type x,@object
.comm x,4,4
.type y,@object
.comm y,4,4
.type z,@object
.comm z,4,4
// SYSV: {{[ -\(\)_A-Za-z0-9.\\/:]+}} :
// SYSV-NEXT: section size addr
// SYSV-NEXT: .text 0 0
// SYSV-NEXT: *COM* 12 0
// SYSV-NEXT: Total 12
// SYSVNOCOMM: {{[ -\(\)_A-Za-z0-9.\\/:]+}} :
// SYSVNOCOMM-NEXT: section size addr
// SYSVNOCOMM-NEXT: .text 0 0
// SYSVNOCOMM-NEXT: Total 0
// BSD: text data bss dec hex filename
// BSD-NEXT: 0 0 12 12 c {{[ -\(\)_A-Za-z0-9.\\/:]+}}
// BSDNOCOMM: text data bss dec hex filename
// BSDNOCOMM-NEXT: 0 0 0 0 0 {{[ -\(\)_A-Za-z0-9.\\/:]+}}

25
llvm/tools/llvm-size/llvm-size.cpp
View File

@ -57,6 +57,12 @@ cl::opt<bool>
DarwinLongFormat("l", cl::desc("When format is darwin, use long format "
"to include addresses and offsets."));
cl::opt<bool>
ELFCommons("common",
cl::desc("Print common symbols in the ELF file. When using "
"Berkely format, this is added to bss."),
cl::init(false));
static cl::list<std::string>
ArchFlags("arch", cl::desc("architecture(s) from a Mach-O file to dump"),
cl::ZeroOrMore);
@ -127,6 +133,15 @@ static bool considerForSize(ObjectFile *Obj, SectionRef Section) {
return true;
}
/// Total size of all ELF common symbols
static uint64_t getCommonSize(ObjectFile *Obj) {
uint64_t TotalCommons = 0;
for (auto &Sym : Obj->symbols())
if (Obj->getSymbolFlags(Sym.getRawDataRefImpl()) & SymbolRef::SF_Common)
TotalCommons += Obj->getCommonSymbolSize(Sym.getRawDataRefImpl());
return TotalCommons;
}
/// Print the size of each Mach-O segment and section in @p MachO.
///
/// This is when used when @c OutputFormat is darwin and produces the same
@ -352,6 +367,13 @@ static void printObjectSectionSizes(ObjectFile *Obj) {
outs() << format(fmt.str().c_str(), namestr.c_str(), size, addr);
}
if (ELFCommons) {
uint64_t CommonSize = getCommonSize(Obj);
total += CommonSize;
outs() << format(fmt.str().c_str(), std::string("*COM*").c_str(),
CommonSize, static_cast<uint64_t>(0));
}
// Print total.
fmtbuf.clear();
fmt << "%-" << max_name_len << "s "
@ -379,6 +401,9 @@ static void printObjectSectionSizes(ObjectFile *Obj) {
total_bss += size;
}
if (ELFCommons)
total_bss += getCommonSize(Obj);
total = total_text + total_data + total_bss;
if (!BerkeleyHeaderPrinted) {