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Add fortified (__*_chk) library functions to TLI (NFC)

Browse Source 
One of them (__memcpy_chk) was already there, the others were checked
by comparing function names.
Note that the fortified libfuncs are now part of TLI, but are always
available, because they aren't generated, only optimized into the
non-checking versions.

Differential Revision: http://reviews.llvm.org/D6179


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221817 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ahmed Bougacha 2014-11-12 21:23:34 +00:00
parent fc0d323d01
commit f9e1e56ea1
3 changed files with 32 additions and 19 deletions
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15
include/llvm/Target/TargetLibraryInfo.h
View File

@ -73,6 +73,11 @@ namespace llvm {
dunder_isoc99_sscanf,
/// void *__memcpy_chk(void *s1, const void *s2, size_t n, size_t s1size);
memcpy_chk,
/// void *__memmove_chk(void *s1, const void *s2, size_t n,
/// size_t s1size);
memmove_chk,
/// void *__memset_chk(void *s, char v, size_t n, size_t s1size);
memset_chk,
/// double __sincospi_stret(double x);
sincospi_stret,
/// float __sincospif_stret(float x);
@ -87,8 +92,18 @@ namespace llvm {
sqrtf_finite,
/// long double __sqrt_finite(long double x);
sqrtl_finite,
/// char *__stpcpy_chk(char *s1, const char *s2, size_t s1size);
stpcpy_chk,
/// char *__stpncpy_chk(char *s1, const char *s2, size_t n,
/// size_t s1size);
stpncpy_chk,
/// char *__strcpy_chk(char *s1, const char *s2, size_t s1size);
strcpy_chk,
/// char * __strdup(const char *s);
dunder_strdup,
/// char *__strncpy_chk(char *s1, const char *s2, size_t n,
/// size_t s1size);
strncpy_chk,
/// char *__strndup(const char *s, size_t n);
dunder_strndup,
/// char * __strtok_r(char *s, const char *delim, char **save_ptr);

6
lib/Target/TargetLibraryInfo.cpp
View File

@ -51,6 +51,8 @@ const char* TargetLibraryInfo::StandardNames[LibFunc::NumLibFuncs] =
"__isoc99_scanf",
"__isoc99_sscanf",
"__memcpy_chk",
"__memmove_chk",
"__memset_chk",
"__sincospi_stret",
"__sincospif_stret",
"__sinpi",
@ -58,7 +60,11 @@ const char* TargetLibraryInfo::StandardNames[LibFunc::NumLibFuncs] =
"__sqrt_finite",
"__sqrtf_finite",
"__sqrtl_finite",
"__stpcpy_chk",
"__stpncpy_chk",
"__strcpy_chk",
"__strdup",
"__strncpy_chk",
"__strndup",
"__strtok_r",
"abs",

30
lib/Transforms/Utils/SimplifyLibCalls.cpp
View File

@ -2184,30 +2184,22 @@ Value *LibCallSimplifier::optimizeCall(CallInst *CI) {
return nullptr;
case LibFunc::memcpy_chk:
return optimizeMemCpyChk(CI, Builder);
case LibFunc::memmove_chk:
return optimizeMemMoveChk(CI, Builder);
case LibFunc::memset_chk:
return optimizeMemSetChk(CI, Builder);
case LibFunc::strcpy_chk:
return optimizeStrCpyChk(CI, Builder);
case LibFunc::stpcpy_chk:
return optimizeStpCpyChk(CI, Builder);
case LibFunc::stpncpy_chk:
case LibFunc::strncpy_chk:
return optimizeStrNCpyChk(CI, Builder);
default:
return nullptr;
}
}
if (!isCallingConvC)
return nullptr;
// Finally check for fortified library calls.
if (FuncName.endswith("_chk")) {
if (FuncName == "__memmove_chk")
return optimizeMemMoveChk(CI, Builder);
else if (FuncName == "__memset_chk")
return optimizeMemSetChk(CI, Builder);
else if (FuncName == "__strcpy_chk")
return optimizeStrCpyChk(CI, Builder);
else if (FuncName == "__stpcpy_chk")
return optimizeStpCpyChk(CI, Builder);
else if (FuncName == "__strncpy_chk")
return optimizeStrNCpyChk(CI, Builder);
else if (FuncName == "__stpncpy_chk")
return optimizeStrNCpyChk(CI, Builder);
}
return nullptr;
}