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[lld-macho] Implement -S 

There are a couple internal builds that require the use of this flag.

Reviewed By: #lld-macho, int3

Differential Revision: https://reviews.llvm.org/D112594
This commit is contained in:
Vincent Lee 2021-10-26 21:42:25 -07:00
parent 6c7b203d1d
commit d54360cd32
5 changed files with 13 additions and 4 deletions
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1
lld/MachO/Config.h
View File

@ -121,6 +121,7 @@ struct Configuration {
bool timeTraceEnabled = false;
bool dataConst = false;
bool dedupLiterals = true;
bool omitDebugInfo = false;
uint32_t headerPad;
uint32_t dylibCompatibilityVersion = 0;
uint32_t dylibCurrentVersion = 0;

1
lld/MachO/Driver.cpp
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@ -1170,6 +1170,7 @@ bool macho::link(ArrayRef<const char *> argsArr, bool canExitEarly,
args.hasArg(OPT_print_dylib_search) || getenv("RC_TRACE_DYLIB_SEARCHING");
config->printEachFile = args.hasArg(OPT_t);
config->printWhyLoad = args.hasArg(OPT_why_load);
config->omitDebugInfo = args.hasArg(OPT_S);
config->outputType = getOutputType(args);
if (const Arg *arg = args.getLastArg(OPT_bundle_loader)) {
if (config->outputType != MH_BUNDLE)

1
lld/MachO/Options.td
View File

@ -557,7 +557,6 @@ def grp_symtab : OptionGroup<"symtab">, HelpText<"SYMBOL TABLE">;
def S : Flag<["-"], "S">,
HelpText<"Strip debug information (STABS or DWARF) from the output">,
Flags<[HelpHidden]>,
Group<grp_symtab>;
def x : Flag<["-"], "x">,
HelpText<"Exclude non-global symbols from the output symbol table">,

3
lld/MachO/SyntheticSections.cpp
View File

@ -876,6 +876,9 @@ void SymtabSection::emitEndFunStab(Defined *defined) {
}
void SymtabSection::emitStabs() {
if (config->omitDebugInfo)
return;
for (const std::string &s : config->astPaths) {
StabsEntry astStab(N_AST);
astStab.strx = stringTableSection.addString(s);

11
lld/test/MachO/stabs.s
View File

@ -53,13 +53,18 @@
## Check that we emit relative path to object files in OSO entries
## when -oso_prefix <path> is used.
# RUN: cd %t && %lld -lSystem test.o foo.o no-debug.o -oso_prefix "%t" -o %t/test-rel
# RUN: dsymutil -s %t/test-rel | grep 'N_OSO' | FileCheck %s -D#TEST_TIME=0x10 -D#FOO_TIME=0x20 --check-prefix=REL-PATH
# RUN: dsymutil -s %t/test-rel | grep 'N_OSO' | FileCheck %s -D#TEST_TIME=0x10 -D#FOO_TIME=0x20 --check-prefix=REL-PATH
# RUN: cd %t && %lld -lSystem test.o foo.o no-debug.o -oso_prefix "." -o %t/test-rel-dot
# RUN: dsymutil -s %t/test-rel-dot | grep 'N_OSO' | FileCheck %s -D#TEST_TIME=0x10 -D#FOO_TIME=0x20 --check-prefix=REL-DOT
# RUN: dsymutil -s %t/test-rel-dot | grep 'N_OSO' | FileCheck %s -D#TEST_TIME=0x10 -D#FOO_TIME=0x20 --check-prefix=REL-DOT
## Set HOME to %t (for ~ to expand to)
# RUN: cd %t && env HOME=%t %lld -lSystem test.o foo.o no-debug.o -oso_prefix "~" -o %t/test-rel-tilde
# RUN: dsymutil -s %t/test-rel-tilde | grep 'N_OSO' | FileCheck %s -D#TEST_TIME=0x10 -D#FOO_TIME=0x20 --check-prefix=REL-PATH
## Check that we don't emit DWARF or stabs when -S is used
# RUN: %lld -lSystem test.o foo.o no-debug.o -S -o %t/test-no-debug
## grep returns an exit code of 1 if it cannot match the intended pattern. We
## expect to not find any entries which requires the exit code to be negated.
# RUN: llvm-nm -ap %t/test-no-debug | not grep -e ' - '
# RUN: cd %t && %lld -lSystem test.o foo.a no-debug.o -o %t/test
# RUN: (llvm-objdump --section-headers %t/test; dsymutil -s %t/test) | \
@ -77,7 +82,7 @@
# CHECK: (N_SO ) 00 0000 0000000000000000 '/tmp/test.cpp'
# CHECK-NEXT: (N_OSO ) 03 0001 [[#%.16x,TEST_TIME]] '[[DIR]]/test.o'
# REL-PATH: (N_OSO ) 03 0001 [[#%.16x,TEST_TIME]] '/test.o'
# REL-DOT: (N_OSO ) 03 0001 [[#%.16x,TEST_TIME]] 'test.o'
# REL-DOT: (N_OSO ) 03 0001 [[#%.16x,TEST_TIME]] 'test.o'
# CHECK-NEXT: (N_STSYM ) [[#%.2d,MORE_DATA_ID + 1]] 0000 [[#%.16x,STATIC:]] '_static_var'
# CHECK-NEXT: (N_FUN ) [[#%.2d,TEXT_ID + 1]] 0000 [[#%.16x,MAIN:]] '_main'
# CHECK-NEXT: (N_FUN ) 00 0000 0000000000000006{{$}}