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Correct size calculations for ELF files

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@259578 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hemant Kulkarni 2016-02-02 21:41:49 +00:00
parent 16ee000624
commit b99b60dd85
3 changed files with 46 additions and 0 deletions
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BIN
test/tools/llvm-size/Inputs/1.o Normal file
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26
test/tools/llvm-size/basic.test
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@ -1,2 +1,28 @@
RUN: llvm-size %t.blah 2>&1 | FileCheck --check-prefix=ENOENT %s
#1.o source
#int x ; int y ; int z;
#
#int main () {
# x = 1;
# y = 1;
# z = 1;
# return x + y + z;
#}
#Compilation: clang -c -O0
RUN: llvm-size -A %p/Inputs/1.o | FileCheck --check-prefix="SYSV" %s
RUN: llvm-size -B %p/Inputs/1.o | FileCheck --check-prefix="BSD" %s
ENOENT: {{.*}}llvm-size{{(\.EXE|\.exe)?}}: {{.*}}.blah: {{[Nn]}}o such file or directory
SYSV: {{[ -\(\)_A-Za-z0-9.\\/:]+}} :
SYSV-NEXT: section size addr
SYSV-NEXT: .text 67 0
SYSV-NEXT: .data 0 0
SYSV-NEXT: .bss 0 0
SYSV-NEXT: .comment 46 0
SYSV-NEXT: .note.GNU-stack 0 0
SYSV-NEXT: .eh_frame 56 0
SYSV-NEXT: Total 169
BSD: text data bss dec hex filename
BSD-NEXT: 67 56 0 123 7b {{[ -\(\)_A-Za-z0-9.\\/:]+}}

20
tools/llvm-size/llvm-size.cpp
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@ -15,11 +15,13 @@
#include "llvm/ADT/APInt.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/MachOUniversal.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/ManagedStatic.h"
@ -111,6 +113,20 @@ static const char *getRadixFmt() {
return nullptr;
}
/// @brief Remove unneeded ELF sections from calculation
static bool ConsiderForSize(ObjectFile *Obj, SectionRef Section) {
if (Obj->isELF()) {
switch (static_cast<ELFSectionRef>(Section).getType()) {
case ELF::SHT_NULL:
case ELF::SHT_SYMTAB:
case ELF::SHT_STRTAB:
case ELF::SHT_REL:
case ELF::SHT_RELA:
return false;
}
}
return true;
}
/// @brief 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
@ -285,6 +301,8 @@ static void PrintObjectSectionSizes(ObjectFile *Obj) {
std::size_t max_size_len = strlen("size");
std::size_t max_addr_len = strlen("addr");
for (const SectionRef &Section : Obj->sections()) {
if (!ConsiderForSize(Obj, Section))
continue;
uint64_t size = Section.getSize();
total += size;
@ -320,6 +338,8 @@ static void PrintObjectSectionSizes(ObjectFile *Obj) {
// Print each section.
for (const SectionRef &Section : Obj->sections()) {
if (!ConsiderForSize(Obj, Section))
continue;
StringRef name;
if (error(Section.getName(name)))
return;