1 //===--- XRayArgs.cpp - Arguments for XRay --------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
9 #include "clang/Driver/XRayArgs.h"
10 #include "ToolChains/CommonArgs.h"
11 #include "clang/Driver/Driver.h"
12 #include "clang/Driver/DriverDiagnostic.h"
13 #include "clang/Driver/Options.h"
14 #include "clang/Driver/ToolChain.h"
15 #include "llvm/ADT/StringExtras.h"
16 #include "llvm/ADT/StringSwitch.h"
17 #include "llvm/Support/FileSystem.h"
18 #include "llvm/Support/Path.h"
19 #include "llvm/Support/ScopedPrinter.h"
20 #include "llvm/Support/SpecialCaseList.h"
22 using namespace clang;
23 using namespace clang::driver;
24 using namespace llvm::opt;
27 constexpr char XRayInstrumentOption[] = "-fxray-instrument";
28 constexpr char XRayInstructionThresholdOption[] =
29 "-fxray-instruction-threshold=";
30 constexpr const char *const XRaySupportedModes[] = {"xray-fdr", "xray-basic"};
33 XRayArgs::XRayArgs(const ToolChain &TC, const ArgList &Args) {
34 const Driver &D = TC.getDriver();
35 const llvm::Triple &Triple = TC.getTriple();
36 if (Args.hasFlag(options::OPT_fxray_instrument,
37 options::OPT_fnoxray_instrument, false)) {
38 if (Triple.getOS() == llvm::Triple::Linux) {
39 switch (Triple.getArch()) {
40 case llvm::Triple::x86_64:
41 case llvm::Triple::arm:
42 case llvm::Triple::aarch64:
43 case llvm::Triple::ppc64le:
44 case llvm::Triple::mips:
45 case llvm::Triple::mipsel:
46 case llvm::Triple::mips64:
47 case llvm::Triple::mips64el:
50 D.Diag(diag::err_drv_clang_unsupported)
51 << (std::string(XRayInstrumentOption) + " on " + Triple.str());
53 } else if (Triple.getOS() == llvm::Triple::FreeBSD ||
54 Triple.getOS() == llvm::Triple::OpenBSD ||
55 Triple.getOS() == llvm::Triple::NetBSD) {
56 if (Triple.getArch() != llvm::Triple::x86_64) {
57 D.Diag(diag::err_drv_clang_unsupported)
58 << (std::string(XRayInstrumentOption) + " on " + Triple.str());
61 D.Diag(diag::err_drv_clang_unsupported)
62 << (std::string(XRayInstrumentOption) + " on " + Triple.str());
64 XRayInstrument = true;
66 Args.getLastArg(options::OPT_fxray_instruction_threshold_,
67 options::OPT_fxray_instruction_threshold_EQ)) {
68 StringRef S = A->getValue();
69 if (S.getAsInteger(0, InstructionThreshold) || InstructionThreshold < 0)
70 D.Diag(clang::diag::err_drv_invalid_value) << A->getAsString(Args) << S;
73 // By default, the back-end will not emit the lowering for XRay customevent
74 // calls if the function is not instrumented. In the future we will change
75 // this default to be the reverse, but in the meantime we're going to
76 // introduce the new functionality behind a flag.
77 if (Args.hasFlag(options::OPT_fxray_always_emit_customevents,
78 options::OPT_fnoxray_always_emit_customevents, false))
79 XRayAlwaysEmitCustomEvents = true;
81 if (Args.hasFlag(options::OPT_fxray_always_emit_typedevents,
82 options::OPT_fnoxray_always_emit_typedevents, false))
83 XRayAlwaysEmitTypedEvents = true;
85 if (!Args.hasFlag(options::OPT_fxray_link_deps,
86 options::OPT_fnoxray_link_deps, true))
90 Args.getAllArgValues(options::OPT_fxray_instrumentation_bundle);
92 InstrumentationBundle.Mask = XRayInstrKind::All;
94 for (const auto &B : Bundles) {
95 llvm::SmallVector<StringRef, 2> BundleParts;
96 llvm::SplitString(B, BundleParts, ",");
97 for (const auto &P : BundleParts) {
98 // TODO: Automate the generation of the string case table.
99 auto Valid = llvm::StringSwitch<bool>(P)
100 .Cases("none", "all", "function", "custom", true)
104 D.Diag(clang::diag::err_drv_invalid_value)
105 << "-fxray-instrumentation-bundle=" << P;
109 auto Mask = parseXRayInstrValue(P);
110 if (Mask == XRayInstrKind::None) {
111 InstrumentationBundle.clear();
115 InstrumentationBundle.Mask |= Mask;
119 // Validate the always/never attribute files. We also make sure that they
120 // are treated as actual dependencies.
121 for (const auto &Filename :
122 Args.getAllArgValues(options::OPT_fxray_always_instrument)) {
123 if (llvm::sys::fs::exists(Filename)) {
124 AlwaysInstrumentFiles.push_back(Filename);
125 ExtraDeps.push_back(Filename);
127 D.Diag(clang::diag::err_drv_no_such_file) << Filename;
130 for (const auto &Filename :
131 Args.getAllArgValues(options::OPT_fxray_never_instrument)) {
132 if (llvm::sys::fs::exists(Filename)) {
133 NeverInstrumentFiles.push_back(Filename);
134 ExtraDeps.push_back(Filename);
136 D.Diag(clang::diag::err_drv_no_such_file) << Filename;
139 for (const auto &Filename :
140 Args.getAllArgValues(options::OPT_fxray_attr_list)) {
141 if (llvm::sys::fs::exists(Filename)) {
142 AttrListFiles.push_back(Filename);
143 ExtraDeps.push_back(Filename);
145 D.Diag(clang::diag::err_drv_no_such_file) << Filename;
148 // Get the list of modes we want to support.
149 auto SpecifiedModes = Args.getAllArgValues(options::OPT_fxray_modes);
150 if (SpecifiedModes.empty())
151 llvm::copy(XRaySupportedModes, std::back_inserter(Modes));
153 for (const auto &Arg : SpecifiedModes) {
154 // Parse CSV values for -fxray-modes=...
155 llvm::SmallVector<StringRef, 2> ModeParts;
156 llvm::SplitString(Arg, ModeParts, ",");
157 for (const auto &M : ModeParts)
161 llvm::copy(XRaySupportedModes, std::back_inserter(Modes));
166 // Then we want to sort and unique the modes we've collected.
167 llvm::sort(Modes.begin(), Modes.end());
168 Modes.erase(std::unique(Modes.begin(), Modes.end()), Modes.end());
172 void XRayArgs::addArgs(const ToolChain &TC, const ArgList &Args,
173 ArgStringList &CmdArgs, types::ID InputType) const {
177 CmdArgs.push_back(XRayInstrumentOption);
179 if (XRayAlwaysEmitCustomEvents)
180 CmdArgs.push_back("-fxray-always-emit-customevents");
182 if (XRayAlwaysEmitTypedEvents)
183 CmdArgs.push_back("-fxray-always-emit-typedevents");
185 CmdArgs.push_back(Args.MakeArgString(Twine(XRayInstructionThresholdOption) +
186 Twine(InstructionThreshold)));
188 for (const auto &Always : AlwaysInstrumentFiles) {
189 SmallString<64> AlwaysInstrumentOpt("-fxray-always-instrument=");
190 AlwaysInstrumentOpt += Always;
191 CmdArgs.push_back(Args.MakeArgString(AlwaysInstrumentOpt));
194 for (const auto &Never : NeverInstrumentFiles) {
195 SmallString<64> NeverInstrumentOpt("-fxray-never-instrument=");
196 NeverInstrumentOpt += Never;
197 CmdArgs.push_back(Args.MakeArgString(NeverInstrumentOpt));
200 for (const auto &AttrFile : AttrListFiles) {
201 SmallString<64> AttrListFileOpt("-fxray-attr-list=");
202 AttrListFileOpt += AttrFile;
203 CmdArgs.push_back(Args.MakeArgString(AttrListFileOpt));
206 for (const auto &Dep : ExtraDeps) {
207 SmallString<64> ExtraDepOpt("-fdepfile-entry=");
209 CmdArgs.push_back(Args.MakeArgString(ExtraDepOpt));
212 for (const auto &Mode : Modes) {
213 SmallString<64> ModeOpt("-fxray-modes=");
215 CmdArgs.push_back(Args.MakeArgString(ModeOpt));