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llvm-mirror/tools
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Joel Galenson 0dd9c1fcd6 [cfi-verify] Support cross-DSO 
When used in cross-DSO mode, CFI will generate calls to special functions rather than trap instructions.  For example, instead of generating

if (!InlinedFastCheck(f))
  abort();
call *f

CFI generates

if (!InlinedFastCheck(f))
  __cfi_slowpath(CallSiteTypeId, f);
call *f

This patch teaches cfi-verify to recognize calls to __cfi_slowpath and abort and treat them as trap functions.

In addition to normal symbols, we also parse the dynamic relocations to handle cross-DSO calls in libraries.

We also extend cfi-verify to recognize other patterns that occur using cross-DSO.  For example, some indirect calls are not guarded by a branch to a trap but instead follow a call to __cfi_slowpath.  For example:

if (!InlinedFastCheck(f))
  call *f
else {
  __cfi_slowpath(CallSiteTypeId, f);
  call *f
}

In this case, the second call to f is not marked as protected by the current code.  We thus recognize if indirect calls directly follow a call to a function that will trap on CFI violations and treat them as protected.

We also ignore indirect calls in the PLT, since on AArch64 each entry contains an indirect call that should not be protected by CFI, and these are labeled incorrectly when debug information is not present.

Differential Revision: https://reviews.llvm.org/D49383

llvm-svn: 340612
2018-08-24 15:21:58 +00:00
..
bugpoint Refactor ExecuteAndWait to take StringRefs. 2018-06-12 17:43:52 +00:00
bugpoint-passes
dsymutil [DWARF] Unify warning callbacks. NFC. 2018-08-23 12:43:33 +00:00
gold [gold] -thinlto-object-suffix-replace: don't append new suffix if path does not end with old suffix 2018-08-22 02:11:36 +00:00
llc [llc] Fix sanitizer failure. 2018-06-23 19:04:10 +00:00
lli [ORC] Rename VSO to JITDylib. 2018-08-17 21:18:18 +00:00
llvm-ar [Support] NFC: Allow modifying access/modification times independently in sys::fs::setLastModificationAndAccessTime. 2018-08-13 23:03:45 +00:00
llvm-as [ThinLTO] Parse module summary index from assembly 2018-06-26 13:56:49 +00:00
llvm-as-fuzzer make add_llvm_fuzzer calls slightly more consisten with other cmake 2018-05-11 17:58:52 +00:00
llvm-bcanalyzer [ADT] Replace std::isprint by llvm::isPrint. 2018-07-26 15:31:41 +00:00
llvm-c-test [C-API][DIBuilder] Added DIFlags in LLVMDIBuilderCreateBasicType 2018-08-19 23:39:47 +00:00
llvm-cat Pass a reference to a module to the bitcode writer. 2018-02-14 19:11:32 +00:00
llvm-cfi-verify [cfi-verify] Support cross-DSO 2018-08-24 15:21:58 +00:00
llvm-config [llvm-config] Use WithColor for printing errors. 2018-06-23 16:50:09 +00:00
llvm-cov [Coverage] Delete getCounterMismatches, it's dead code (NFC) 2018-08-07 22:25:22 +00:00
llvm-cvtres [llvm-cvtres] Allow parameters preceded by '-' in addition to '/' 2018-05-02 21:15:13 +00:00
llvm-cxxdump Fixing a typo; NFC. 2018-07-23 18:09:43 +00:00
llvm-cxxfilt Define InitLLVM to do common initialization all at once. 2018-04-13 18:26:06 +00:00
llvm-demangle-fuzzer make add_llvm_fuzzer calls slightly more consisten with other cmake 2018-05-11 17:58:52 +00:00
llvm-diff Let llvm-diff correctly deal with Undef/ConstantAggregateZero/ConstantVector/IndirectBr 2018-04-12 21:28:04 +00:00
llvm-dis [ThinLTO] Print module summary index to assembly 2018-05-26 02:34:13 +00:00
llvm-dwarfdump [DebugInfo/DWARF] Remove redundant iterator type. NFC 2018-08-02 19:29:38 +00:00
llvm-dwp MC: Change the streamer ctors to take an object writer instead of a stream. NFCI. 2018-05-18 18:26:45 +00:00
llvm-exegesis [llvm-exegesis] Renaming classes and functions. 2018-08-03 09:29:38 +00:00
llvm-extract Define InitLLVM to do common initialization all at once. 2018-04-13 18:26:06 +00:00
llvm-go [bindings/go] Add coroutine passes 2018-08-19 23:40:05 +00:00
llvm-isel-fuzzer CodeGen: Add a dwo output file argument to addPassesToEmitFile and hook it up to dwo output. 2018-05-21 20:16:41 +00:00
llvm-jitlistener Define InitLLVM to do common initialization all at once. 2018-04-13 18:26:06 +00:00
llvm-link Restore "[ThinLTO] Ensure we always select the same function copy to import" 2018-07-16 15:30:27 +00:00
llvm-lto [ThinLTO] Rename index IsAnalysis flag to HaveGVs (NFC) 2018-06-06 22:22:01 +00:00
llvm-lto2 [LTO] Allow pass remarks with hotness to be set when emitting to stderr 2018-05-04 23:59:34 +00:00
llvm-mc [ADT] Normalize empty triple components 2018-08-08 22:23:57 +00:00
llvm-mc-assemble-fuzzer [llvm-mc-assemble-fuzzer] Update API - Pass MCObjectWriter instead of a stream 2018-08-17 04:38:41 +00:00
llvm-mc-disassemble-fuzzer make add_llvm_fuzzer calls slightly more consisten with other cmake 2018-05-11 17:58:52 +00:00
llvm-mca [llvm-mca] Fix parameter name. NFC. 2018-08-23 20:17:42 +00:00
llvm-modextract Pass a reference to a module to the bitcode writer. 2018-02-14 19:11:32 +00:00
llvm-mt [llvm-mt] Use WithColor for printing errors. 2018-06-23 16:49:07 +00:00
llvm-nm nm: Add -no-weak flag for hiding weak symbols 2018-07-02 17:24:37 +00:00
llvm-objcopy [llvm-objcopy] Simplify find(X,Y) != X.end() with is_contained() 2018-08-21 00:13:52 +00:00
llvm-objdump [llvm-objdump] Label calls to the PLT. 2018-08-24 15:21:57 +00:00
llvm-opt-fuzzer make add_llvm_fuzzer calls slightly more consisten with other cmake 2018-05-11 17:58:52 +00:00
llvm-opt-report Remove \brief commands from doxygen comments. 2018-05-01 15:54:18 +00:00
llvm-pdbutil [llvm-pdbutil] Support PDBs without a DBI stream 2018-08-06 19:35:00 +00:00
llvm-profdata Make llvm-profdata show -text work as advertised in the documentation. 2018-08-24 01:34:45 +00:00
llvm-rc [FileSystem] Split up the OpenFlags enumeration. 2018-06-07 19:58:58 +00:00
llvm-readobj MC: Teach the COFF object writer to write address-significance tables. 2018-08-22 23:58:16 +00:00
llvm-rtdyld Define InitLLVM to do common initialization all at once. 2018-04-13 18:26:06 +00:00
llvm-shlib [RFC] Build LLVM-C.dll on MSVC that exports only the C API 2018-08-07 15:54:50 +00:00
llvm-size [llvm-size] Make global variables static 2018-06-22 22:20:10 +00:00
llvm-special-case-list-fuzzer make add_llvm_fuzzer calls slightly more consisten with other cmake 2018-05-11 17:58:52 +00:00
llvm-split Pass a reference to a module to the bitcode writer. 2018-02-14 19:11:32 +00:00
llvm-stress
llvm-strings Define InitLLVM to do common initialization all at once. 2018-04-13 18:26:06 +00:00
llvm-symbolizer [llvm-symbolizer] Simplify 2018-05-26 02:29:14 +00:00
llvm-undname [llvm-undname Add an option to dump back references. 2018-08-01 18:33:04 +00:00
llvm-xray [XRay][tools] Use Support/JSON.h in llvm-xray convert 2018-08-03 09:21:31 +00:00
llvm-yaml-numeric-parser-fuzzer Use LLVM_BUILTIN_TRAP not __builtin_trap to appease windows builds. NFCI. 2018-08-20 09:49:20 +00:00
lto s/LLVM_ON_WIN32/_WIN32/, llvm 2018-04-29 00:45:03 +00:00
msbuild vs integration: bump version number 2018-08-09 11:57:36 +00:00
obj2yaml Fix debug build by adding missing dependencies on libBinaryFormat 2018-05-15 00:46:43 +00:00
opt [Debugify] Export per-pass debug info loss statistics 2018-07-24 00:41:29 +00:00
opt-viewer [opt-viewer] Kill parser processes before moving onto rendering 2018-02-26 21:15:51 +00:00
sancov Rename sancov.cc to sancov.cpp 2018-04-25 18:06:23 +00:00
sanstats
verify-uselistorder Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
xcode-toolchain [CMake] Use LLVM_ENABLE_IDE instead of CMAKE_CONFIGURATION_TYPES 2018-08-22 18:40:24 +00:00
yaml2obj [yaml2obj] - Allow to use numeric sh_link (Link) value for sections. 2018-08-16 12:44:17 +00:00
CMakeLists.txt [RFC] Build LLVM-C.dll on MSVC that exports only the C API 2018-08-07 15:54:50 +00:00
LLVMBuild.txt Add a Microsoft Demangler. 2018-07-20 17:27:48 +00:00