SanitizerCoverage.cpp File Reference

#include "llvm/Transforms/Instrumentation/SanitizerCoverage.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/PostDominators.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/EHPersonalities.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/ValueSymbolTable.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/SpecialCaseList.h"
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/TargetParser/Triple.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/ModuleUtils.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "sancov"

Functions
static bool	isFullDominator (const BasicBlock *BB, const DominatorTree &DT)
static bool	isFullPostDominator (const BasicBlock *BB, const PostDominatorTree &PDT)
static bool	shouldInstrumentBlock (const Function &F, const BasicBlock *BB, const DominatorTree &DT, const PostDominatorTree &PDT, const SanitizerCoverageOptions &Options)
static bool	IsBackEdge (BasicBlock *From, BasicBlock *To, const DominatorTree &DT)
static bool	IsInterestingCmp (ICmpInst *CMP, const DominatorTree &DT, const SanitizerCoverageOptions &Options)

Variables
const char	SanCovTracePCIndirName [] = "__sanitizer_cov_trace_pc_indir"
const char	SanCovTracePCName [] = "__sanitizer_cov_trace_pc"
const char	SanCovTraceCmp1 [] = "__sanitizer_cov_trace_cmp1"
const char	SanCovTraceCmp2 [] = "__sanitizer_cov_trace_cmp2"
const char	SanCovTraceCmp4 [] = "__sanitizer_cov_trace_cmp4"
const char	SanCovTraceCmp8 [] = "__sanitizer_cov_trace_cmp8"
const char	SanCovTraceConstCmp1 [] = "__sanitizer_cov_trace_const_cmp1"
const char	SanCovTraceConstCmp2 [] = "__sanitizer_cov_trace_const_cmp2"
const char	SanCovTraceConstCmp4 [] = "__sanitizer_cov_trace_const_cmp4"
const char	SanCovTraceConstCmp8 [] = "__sanitizer_cov_trace_const_cmp8"
const char	SanCovLoad1 [] = "__sanitizer_cov_load1"
const char	SanCovLoad2 [] = "__sanitizer_cov_load2"
const char	SanCovLoad4 [] = "__sanitizer_cov_load4"
const char	SanCovLoad8 [] = "__sanitizer_cov_load8"
const char	SanCovLoad16 [] = "__sanitizer_cov_load16"
const char	SanCovStore1 [] = "__sanitizer_cov_store1"
const char	SanCovStore2 [] = "__sanitizer_cov_store2"
const char	SanCovStore4 [] = "__sanitizer_cov_store4"
const char	SanCovStore8 [] = "__sanitizer_cov_store8"
const char	SanCovStore16 [] = "__sanitizer_cov_store16"
const char	SanCovTraceDiv4 [] = "__sanitizer_cov_trace_div4"
const char	SanCovTraceDiv8 [] = "__sanitizer_cov_trace_div8"
const char	SanCovTraceGep [] = "__sanitizer_cov_trace_gep"
const char	SanCovTraceSwitchName [] = "__sanitizer_cov_trace_switch"
const char	SanCovModuleCtorTracePcGuardName []
const char	SanCovModuleCtor8bitCountersName []
const char	SanCovModuleCtorBoolFlagName [] = "sancov.module_ctor_bool_flag"
static const uint64_t	SanCtorAndDtorPriority = 2
const char	SanCovTracePCGuardName [] = "__sanitizer_cov_trace_pc_guard"
const char	SanCovTracePCGuardInitName [] = "__sanitizer_cov_trace_pc_guard_init"
const char	SanCov8bitCountersInitName [] = "__sanitizer_cov_8bit_counters_init"
const char	SanCovBoolFlagInitName [] = "__sanitizer_cov_bool_flag_init"
const char	SanCovPCsInitName [] = "__sanitizer_cov_pcs_init"
const char	SanCovCFsInitName [] = "__sanitizer_cov_cfs_init"
const char	SanCovGuardsSectionName [] = "sancov_guards"
const char	SanCovCountersSectionName [] = "sancov_cntrs"
const char	SanCovBoolFlagSectionName [] = "sancov_bools"
const char	SanCovPCsSectionName [] = "sancov_pcs"
const char	SanCovCFsSectionName [] = "sancov_cfs"
const char	SanCovCallbackGateSectionName [] = "sancov_gate"
const char	SanCovLowestStackName [] = "__sancov_lowest_stack"
const char	SanCovCallbackGateName [] = "__sancov_should_track"
static cl::opt< int >	ClCoverageLevel ("sanitizer-coverage-level", cl::desc("Sanitizer Coverage. 0: none, 1: entry block, 2: all blocks, " "3: all blocks and critical edges"), cl::Hidden)
static cl::opt< bool >	ClTracePC ("sanitizer-coverage-trace-pc", cl::desc("Experimental pc tracing"), cl::Hidden)
static cl::opt< bool >	ClTracePCGuard ("sanitizer-coverage-trace-pc-guard", cl::desc("pc tracing with a guard"), cl::Hidden)
static cl::opt< bool >	ClCreatePCTable ("sanitizer-coverage-pc-table", cl::desc("create a static PC table"), cl::Hidden)
static cl::opt< bool >	ClInline8bitCounters ("sanitizer-coverage-inline-8bit-counters", cl::desc("increments 8-bit counter for every edge"), cl::Hidden)
static cl::opt< bool >	ClInlineBoolFlag ("sanitizer-coverage-inline-bool-flag", cl::desc("sets a boolean flag for every edge"), cl::Hidden)
static cl::opt< bool >	ClCMPTracing ("sanitizer-coverage-trace-compares", cl::desc("Tracing of CMP and similar instructions"), cl::Hidden)
static cl::opt< bool >	ClDIVTracing ("sanitizer-coverage-trace-divs", cl::desc("Tracing of DIV instructions"), cl::Hidden)
static cl::opt< bool >	ClLoadTracing ("sanitizer-coverage-trace-loads", cl::desc("Tracing of load instructions"), cl::Hidden)
static cl::opt< bool >	ClStoreTracing ("sanitizer-coverage-trace-stores", cl::desc("Tracing of store instructions"), cl::Hidden)
static cl::opt< bool >	ClGEPTracing ("sanitizer-coverage-trace-geps", cl::desc("Tracing of GEP instructions"), cl::Hidden)
static cl::opt< bool >	ClPruneBlocks ("sanitizer-coverage-prune-blocks", cl::desc("Reduce the number of instrumented blocks"), cl::Hidden, cl::init(true))
static cl::opt< bool >	ClStackDepth ("sanitizer-coverage-stack-depth", cl::desc("max stack depth tracing"), cl::Hidden)
static cl::opt< bool >	ClCollectCF ("sanitizer-coverage-control-flow", cl::desc("collect control flow for each function"), cl::Hidden)
static cl::opt< bool >	ClGatedCallbacks ("sanitizer-coverage-gated-trace-callbacks", cl::desc("Gate the invocation of the tracing callbacks on a global variable" ". Currently only supported for trace-pc-guard and trace-cmp."), cl::Hidden, cl::init(false))

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "sancov"

Definition at line 42 of file SanitizerCoverage.cpp.

Function Documentation

IsBackEdge()

static bool IsBackEdge ( BasicBlock *  From, BasicBlock *  To, const DominatorTree &  DT  )

static

Definition at line 613 of file SanitizerCoverage.cpp.

References llvm::DominatorTree::dominates(), From, and llvm::BasicBlock::getUniqueSuccessor().

Referenced by IsInterestingCmp().

isFullDominator()

static bool isFullDominator ( const BasicBlock *  BB, const DominatorTree &  DT  )

static

Definition at line 559 of file SanitizerCoverage.cpp.

References llvm::all_of(), llvm::DominatorTree::dominates(), llvm::succ_empty(), and llvm::successors().

Referenced by shouldInstrumentBlock().

isFullPostDominator()

static bool isFullPostDominator ( const BasicBlock *  BB, const PostDominatorTree &  PDT  )

static

Definition at line 569 of file SanitizerCoverage.cpp.

References llvm::all_of(), llvm::PostDominatorTree::dominates(), llvm::pred_empty(), and llvm::predecessors().

Referenced by shouldInstrumentBlock().

IsInterestingCmp()

static bool IsInterestingCmp ( ICmpInst *  CMP, const DominatorTree &  DT, const SanitizerCoverageOptions &  Options  )

static

Definition at line 628 of file SanitizerCoverage.cpp.

References B, IsBackEdge(), and Options.

shouldInstrumentBlock()

static bool shouldInstrumentBlock ( const Function &  F, const BasicBlock *  BB, const DominatorTree &  DT, const PostDominatorTree &  PDT, const SanitizerCoverageOptions &  Options  )

static

Definition at line 579 of file SanitizerCoverage.cpp.

References llvm::BasicBlock::end(), F, llvm::BasicBlock::getFirstInsertionPt(), llvm::BasicBlock::getFirstNonPHIOrDbgOrLifetime(), llvm::BasicBlock::getSinglePredecessor(), isFullDominator(), isFullPostDominator(), Options, and llvm::SanitizerCoverageOptions::SCK_Function.

Variable Documentation

ClCMPTracing

cl::opt< bool > ClCMPTracing("sanitizer-coverage-trace-compares", cl::desc("Tracing of CMP and similar instructions"), cl::Hidden) ( "sanitizer-coverage-trace-compares"  , cl::desc("Tracing of CMP and similar instructions")  , cl::Hidden    )

static

ClCollectCF

cl::opt< bool > ClCollectCF("sanitizer-coverage-control-flow", cl::desc("collect control flow for each function"), cl::Hidden) ( "sanitizer-coverage-control-flow"  , cl::desc("collect control flow for each function")  , cl::Hidden    )

static

ClCoverageLevel

cl::opt< int > ClCoverageLevel("sanitizer-coverage-level", cl::desc("Sanitizer Coverage. 0: none, 1: entry block, 2: all blocks, " "3: all blocks and critical edges"), cl::Hidden) ( "sanitizer-coverage-level"  , cl::desc("Sanitizer Coverage. 0: none, 1: entry block, 2: all blocks, " "3: all blocks and critical edges")  , cl::Hidden    )

static

ClCreatePCTable

cl::opt< bool > ClCreatePCTable("sanitizer-coverage-pc-table", cl::desc("create a static PC table"), cl::Hidden) ( "sanitizer-coverage-pc-table"  , cl::desc("create a static PC table")  , cl::Hidden    )

static

ClDIVTracing

cl::opt< bool > ClDIVTracing("sanitizer-coverage-trace-divs", cl::desc("Tracing of DIV instructions"), cl::Hidden) ( "sanitizer-coverage-trace-divs"  , cl::desc("Tracing of DIV instructions")  , cl::Hidden    )

static

ClGatedCallbacks

cl::opt< bool > ClGatedCallbacks("sanitizer-coverage-gated-trace-callbacks", cl::desc("Gate the invocation of the tracing callbacks on a global variable" ". Currently only supported for trace-pc-guard and trace-cmp."), cl::Hidden, cl::init(false)) ( "sanitizer-coverage-gated-trace-callbacks"  , cl::desc("Gate the invocation of the tracing callbacks on a global variable" ". Currently only supported for trace-pc-guard and trace-cmp.")  , cl::Hidden  , cl::init(false)    )

static

ClGEPTracing

cl::opt< bool > ClGEPTracing("sanitizer-coverage-trace-geps", cl::desc("Tracing of GEP instructions"), cl::Hidden) ( "sanitizer-coverage-trace-geps"  , cl::desc("Tracing of GEP instructions")  , cl::Hidden    )

static

ClInline8bitCounters

cl::opt< bool > ClInline8bitCounters("sanitizer-coverage-inline-8bit-counters", cl::desc("increments 8-bit counter for every edge"), cl::Hidden) ( "sanitizer-coverage-inline-8bit-counters"  , cl::desc("increments 8-bit counter for every edge")  , cl::Hidden    )

static

ClInlineBoolFlag

cl::opt< bool > ClInlineBoolFlag("sanitizer-coverage-inline-bool-flag", cl::desc("sets a boolean flag for every edge"), cl::Hidden) ( "sanitizer-coverage-inline-bool-flag"  , cl::desc("sets a boolean flag for every edge")  , cl::Hidden    )

static

ClLoadTracing

cl::opt< bool > ClLoadTracing("sanitizer-coverage-trace-loads", cl::desc("Tracing of load instructions"), cl::Hidden) ( "sanitizer-coverage-trace-loads"  , cl::desc("Tracing of load instructions")  , cl::Hidden    )

static

ClPruneBlocks

cl::opt< bool > ClPruneBlocks("sanitizer-coverage-prune-blocks", cl::desc("Reduce the number of instrumented blocks"), cl::Hidden, cl::init(true)) ( "sanitizer-coverage-prune-blocks"  , cl::desc("Reduce the number of instrumented blocks")  , cl::Hidden  , cl::init(true)    )

static

ClStackDepth

cl::opt< bool > ClStackDepth("sanitizer-coverage-stack-depth", cl::desc("max stack depth tracing"), cl::Hidden) ( "sanitizer-coverage-stack-depth"  , cl::desc("max stack depth tracing")  , cl::Hidden    )

static

ClStoreTracing

cl::opt< bool > ClStoreTracing("sanitizer-coverage-trace-stores", cl::desc("Tracing of store instructions"), cl::Hidden) ( "sanitizer-coverage-trace-stores"  , cl::desc("Tracing of store instructions")  , cl::Hidden    )

static

ClTracePC

cl::opt< bool > ClTracePC("sanitizer-coverage-trace-pc", cl::desc("Experimental pc tracing"), cl::Hidden) ( "sanitizer-coverage-trace-pc"  , cl::desc("Experimental pc tracing")  , cl::Hidden    )

static

ClTracePCGuard

cl::opt< bool > ClTracePCGuard("sanitizer-coverage-trace-pc-guard", cl::desc("pc tracing with a guard"), cl::Hidden) ( "sanitizer-coverage-trace-pc-guard"  , cl::desc("pc tracing with a guard")  , cl::Hidden    )

static

SanCov8bitCountersInitName

const char SanCov8bitCountersInitName[] = "__sanitizer_cov_8bit_counters_init"

Definition at line 77 of file SanitizerCoverage.cpp.

SanCovBoolFlagInitName

const char SanCovBoolFlagInitName[] = "__sanitizer_cov_bool_flag_init"

Definition at line 78 of file SanitizerCoverage.cpp.

SanCovBoolFlagSectionName

const char SanCovBoolFlagSectionName[] = "sancov_bools"

Definition at line 84 of file SanitizerCoverage.cpp.

SanCovCallbackGateName

const char SanCovCallbackGateName[] = "__sancov_should_track"

Definition at line 90 of file SanitizerCoverage.cpp.

SanCovCallbackGateSectionName

const char SanCovCallbackGateSectionName[] = "sancov_gate"

Definition at line 87 of file SanitizerCoverage.cpp.

SanCovCFsInitName

const char SanCovCFsInitName[] = "__sanitizer_cov_cfs_init"

Definition at line 80 of file SanitizerCoverage.cpp.

SanCovCFsSectionName

const char SanCovCFsSectionName[] = "sancov_cfs"

Definition at line 86 of file SanitizerCoverage.cpp.

SanCovCountersSectionName

const char SanCovCountersSectionName[] = "sancov_cntrs"

Definition at line 83 of file SanitizerCoverage.cpp.

SanCovGuardsSectionName

const char SanCovGuardsSectionName[] = "sancov_guards"

Definition at line 82 of file SanitizerCoverage.cpp.

SanCovLoad1

const char SanCovLoad1[] = "__sanitizer_cov_load1"

Definition at line 54 of file SanitizerCoverage.cpp.

SanCovLoad16

const char SanCovLoad16[] = "__sanitizer_cov_load16"

Definition at line 58 of file SanitizerCoverage.cpp.

SanCovLoad2

const char SanCovLoad2[] = "__sanitizer_cov_load2"

Definition at line 55 of file SanitizerCoverage.cpp.

SanCovLoad4

const char SanCovLoad4[] = "__sanitizer_cov_load4"

Definition at line 56 of file SanitizerCoverage.cpp.

SanCovLoad8

const char SanCovLoad8[] = "__sanitizer_cov_load8"

Definition at line 57 of file SanitizerCoverage.cpp.

SanCovLowestStackName

const char SanCovLowestStackName[] = "__sancov_lowest_stack"

Definition at line 89 of file SanitizerCoverage.cpp.

SanCovModuleCtor8bitCountersName

const char SanCovModuleCtor8bitCountersName[]

Initial value:

=
    "sancov.module_ctor_8bit_counters"

Definition at line 70 of file SanitizerCoverage.cpp.

SanCovModuleCtorBoolFlagName

const char SanCovModuleCtorBoolFlagName[] = "sancov.module_ctor_bool_flag"

Definition at line 72 of file SanitizerCoverage.cpp.

SanCovModuleCtorTracePcGuardName

const char SanCovModuleCtorTracePcGuardName[]

Initial value:

=
    "sancov.module_ctor_trace_pc_guard"

Definition at line 68 of file SanitizerCoverage.cpp.

SanCovPCsInitName

const char SanCovPCsInitName[] = "__sanitizer_cov_pcs_init"

Definition at line 79 of file SanitizerCoverage.cpp.

SanCovPCsSectionName

const char SanCovPCsSectionName[] = "sancov_pcs"

Definition at line 85 of file SanitizerCoverage.cpp.

SanCovStore1

const char SanCovStore1[] = "__sanitizer_cov_store1"

Definition at line 59 of file SanitizerCoverage.cpp.

SanCovStore16

const char SanCovStore16[] = "__sanitizer_cov_store16"

Definition at line 63 of file SanitizerCoverage.cpp.

SanCovStore2

const char SanCovStore2[] = "__sanitizer_cov_store2"

Definition at line 60 of file SanitizerCoverage.cpp.

SanCovStore4

const char SanCovStore4[] = "__sanitizer_cov_store4"

Definition at line 61 of file SanitizerCoverage.cpp.

SanCovStore8

const char SanCovStore8[] = "__sanitizer_cov_store8"

Definition at line 62 of file SanitizerCoverage.cpp.

SanCovTraceCmp1

const char SanCovTraceCmp1[] = "__sanitizer_cov_trace_cmp1"

Definition at line 46 of file SanitizerCoverage.cpp.

SanCovTraceCmp2

const char SanCovTraceCmp2[] = "__sanitizer_cov_trace_cmp2"

Definition at line 47 of file SanitizerCoverage.cpp.

SanCovTraceCmp4

const char SanCovTraceCmp4[] = "__sanitizer_cov_trace_cmp4"

Definition at line 48 of file SanitizerCoverage.cpp.

SanCovTraceCmp8

const char SanCovTraceCmp8[] = "__sanitizer_cov_trace_cmp8"

Definition at line 49 of file SanitizerCoverage.cpp.

SanCovTraceConstCmp1

const char SanCovTraceConstCmp1[] = "__sanitizer_cov_trace_const_cmp1"

Definition at line 50 of file SanitizerCoverage.cpp.

SanCovTraceConstCmp2

const char SanCovTraceConstCmp2[] = "__sanitizer_cov_trace_const_cmp2"

Definition at line 51 of file SanitizerCoverage.cpp.

SanCovTraceConstCmp4

const char SanCovTraceConstCmp4[] = "__sanitizer_cov_trace_const_cmp4"

Definition at line 52 of file SanitizerCoverage.cpp.

SanCovTraceConstCmp8

const char SanCovTraceConstCmp8[] = "__sanitizer_cov_trace_const_cmp8"

Definition at line 53 of file SanitizerCoverage.cpp.

SanCovTraceDiv4

const char SanCovTraceDiv4[] = "__sanitizer_cov_trace_div4"

Definition at line 64 of file SanitizerCoverage.cpp.

SanCovTraceDiv8

const char SanCovTraceDiv8[] = "__sanitizer_cov_trace_div8"

Definition at line 65 of file SanitizerCoverage.cpp.

SanCovTraceGep

const char SanCovTraceGep[] = "__sanitizer_cov_trace_gep"

Definition at line 66 of file SanitizerCoverage.cpp.

SanCovTracePCGuardInitName

const char SanCovTracePCGuardInitName[] = "__sanitizer_cov_trace_pc_guard_init"

Definition at line 76 of file SanitizerCoverage.cpp.

SanCovTracePCGuardName

const char SanCovTracePCGuardName[] = "__sanitizer_cov_trace_pc_guard"

Definition at line 75 of file SanitizerCoverage.cpp.

SanCovTracePCIndirName

const char SanCovTracePCIndirName[] = "__sanitizer_cov_trace_pc_indir"

Definition at line 44 of file SanitizerCoverage.cpp.

SanCovTracePCName

const char SanCovTracePCName[] = "__sanitizer_cov_trace_pc"

Definition at line 45 of file SanitizerCoverage.cpp.

SanCovTraceSwitchName

const char SanCovTraceSwitchName[] = "__sanitizer_cov_trace_switch"

Definition at line 67 of file SanitizerCoverage.cpp.

SanCtorAndDtorPriority

const uint64_t SanCtorAndDtorPriority = 2

static

Definition at line 73 of file SanitizerCoverage.cpp.