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[Driver] Add flag enabling the function stack size section that was added in r319430 

Adds the -fstack-size-section flag to enable the .stack_sizes section. The flag defaults to on for the PS4 triple.

Differential Revision: https://reviews.llvm.org/D40712

llvm-svn: 321992
This commit is contained in:
Sean Eveson 2018-01-08 13:42:26 +00:00
parent 3800f0f11d
commit 5110d4f5c0
7 changed files with 28 additions and 0 deletions
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4
clang/include/clang/Driver/Options.td
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@ -1574,6 +1574,10 @@ def fdata_sections : Flag <["-"], "fdata-sections">, Group<f_Group>,
Flags<[CC1Option]>, HelpText<"Place each data in its own section (ELF Only)">;
def fno_data_sections : Flag <["-"], "fno-data-sections">, Group<f_Group>,
Flags<[CC1Option]>;
def fstack_size_section : Flag<["-"], "fstack-size-section">, Group<f_Group>, Flags<[CC1Option]>,
HelpText<"Emit section containing metadata on function stack sizes">;
def fno_stack_size_section : Flag<["-"], "fno-stack-size-section">, Group<f_Group>, Flags<[CC1Option]>,
HelpText<"Don't emit section containing metadata on function stack sizes">;
def funique_section_names : Flag <["-"], "funique-section-names">,
Group<f_Group>, Flags<[CC1Option]>,

1
clang/include/clang/Frontend/CodeGenOptions.def
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@ -83,6 +83,7 @@ CODEGENOPT(InstrumentFunctionEntryBare , 1, 0) ///< Set when
CODEGENOPT(XRayInstrumentFunctions , 1, 0) ///< Set when -fxray-instrument is
///< enabled.
CODEGENOPT(StackSizeSection , 1, 0) ///< Set when -fstack-size-section is enabled.
///< Set when -fxray-always-emit-customevents is enabled.
CODEGENOPT(XRayAlwaysEmitCustomEvents , 1, 0)

1
clang/lib/CodeGen/BackendUtil.cpp
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@ -448,6 +448,7 @@ static void initTargetOptions(llvm::TargetOptions &Options,
Options.UniqueSectionNames = CodeGenOpts.UniqueSectionNames;
Options.EmulatedTLS = CodeGenOpts.EmulatedTLS;
Options.DebuggerTuning = CodeGenOpts.getDebuggerTuning();
Options.EmitStackSizeSection = CodeGenOpts.StackSizeSection;
if (CodeGenOpts.EnableSplitDwarf)
Options.MCOptions.SplitDwarfFile = CodeGenOpts.SplitDwarfFile;

4
clang/lib/Driver/ToolChains/Clang.cpp
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@ -3798,6 +3798,10 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
CmdArgs.push_back(A->getValue());
}
if (Args.hasFlag(options::OPT_fstack_size_section,
options::OPT_fno_stack_size_section, RawTriple.isPS4()))
CmdArgs.push_back("-fstack-size-section");
CmdArgs.push_back("-ferror-limit");
if (Arg *A = Args.getLastArg(options::OPT_ferror_limit_EQ))
CmdArgs.push_back(A->getValue());

2
clang/lib/Frontend/CompilerInvocation.cpp
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@ -682,6 +682,8 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
OPT_fno_function_sections, false);
Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
OPT_fno_data_sections, false);
Opts.StackSizeSection =
Args.hasFlag(OPT_fstack_size_section, OPT_fno_stack_size_section, false);
Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
OPT_fno_unique_section_names, true);

7
clang/test/CodeGen/stack-size-section.c Normal file
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@ -0,0 +1,7 @@
// RUN: %clang_cc1 -triple x86_64-unknown %s -S -o - | FileCheck %s --check-prefix=CHECK-ABSENT
// CHECK-ABSENT-NOT: section .stack_sizes
// RUN: %clang_cc1 -triple x86_64-unknown -fstack-size-section %s -S -o - | FileCheck %s --check-prefix=CHECK-PRESENT
// CHECK-PRESENT: section .stack_sizes
int foo() { return 42; }

9
clang/test/Driver/stack-size-section.c Normal file
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@ -0,0 +1,9 @@
// RUN: %clang -target x86_64-unknown %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ABSENT
// RUN: %clang -target x86_64-scei-ps4 -fno-stack-size-section %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ABSENT
// CHECK-ABSENT-NOT: -fstack-size-section
// RUN: %clang -target x86_64-unknown -fstack-size-section -### 2>&1 | FileCheck %s --check-prefix=CHECK-PRESENT
// RUN: %clang -target x86_64-scei-ps4 %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-PRESENT
// CHECK-PRESENT: -fstack-size-section
int foo() { return 42; }