Replace strcpy with memcpy when we have the length around anyway.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94746 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp b/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
index c02d84f1a59b642a62f40e4d9f553e85272418b0..7b061d3ac3464cd93269d02916cc0d247aec7ead 100644 (file)
--- a/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
+++ b/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
@@ -368,7 +368,7 @@ GenericValue lle_X_sprintf(const FunctionType *FT,
 
       switch (Last) {
       case '%':
-        strcpy(Buffer, "%"); break;
+        memcpy(Buffer, "%", 2); break;
       case 'c':
         sprintf(Buffer, FmtBuf, uint32_t(Args[ArgNo++].IntVal.getZExtValue()));
         break;
@@ -400,8 +400,9 @@ GenericValue lle_X_sprintf(const FunctionType *FT,
         errs() << "<unknown printf code '" << *FmtStr << "'!>";
         ArgNo++; break;
       }
-      strcpy(OutputBuffer, Buffer);
-      OutputBuffer += strlen(Buffer);
+      size_t Len = strlen(Buffer);
+      memcpy(OutputBuffer, Buffer, Len + 1);
+      OutputBuffer += Len;
       }
       break;
     }

diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index fa692be8cc2c08686972a6d3fe9cb24923682085..961dc1fef9238cce3bc96ac6814df5d5e89fbc1d 100644 (file)
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -507,8 +507,9 @@ void cl::ParseCommandLineOptions(int argc, char **argv,
 
   // Copy the program name into ProgName, making sure not to overflow it.
   std::string ProgName = sys::Path(argv[0]).getLast();
-  if (ProgName.size() > 79) ProgName.resize(79);
-  strcpy(ProgramName, ProgName.c_str());
+  size_t Len = std::min(ProgName.size(), size_t(79));
+  memcpy(ProgramName, ProgName.data(), Len);
+  ProgramName[Len] = '\0';
 
   ProgramOverview = Overview;
   bool ErrorParsing = false;

diff --git a/lib/Target/PIC16/PIC16.h b/lib/Target/PIC16/PIC16.h
index e46c9b242e3c8e4e3325d7b70aabc888abe8896d..8d067de676b69c19239dce9da597dda260fa37d4 100644 (file)
--- a/lib/Target/PIC16/PIC16.h
+++ b/lib/Target/PIC16/PIC16.h
@@ -55,9 +55,10 @@ namespace PIC16CC {
 
   // External symbol names require memory to live till the program end.
   // So we have to allocate it and keep.
+  // FIXME: Don't leak the allocated strings.
   inline static const char *createESName (const std::string &name) {
     char *tmpName = new char[name.size() + 1];
-    strcpy (tmpName, name.c_str());
+    memcpy(tmpName, name.c_str(), name.size() + 1);
     return tmpName;
   }
 

diff --git a/tools/bugpoint/ExtractFunction.cpp b/tools/bugpoint/ExtractFunction.cpp
index 918d6a6a2afb6f9665700079d28c7ba7a05f3db9..70011a798b924e92801bf87991e42d8850b85323 100644 (file)
--- a/tools/bugpoint/ExtractFunction.cpp
+++ b/tools/bugpoint/ExtractFunction.cpp
@@ -323,8 +323,6 @@ llvm::SplitFunctionsOutOfModule(Module *M,
 Module *BugDriver::ExtractMappedBlocksFromModule(const
                                                  std::vector<BasicBlock*> &BBs,
                                                  Module *M) {
-  char *ExtraArg = NULL;
-
   sys::Path uniqueFilename(OutputPrefix + "-extractblocks");
   std::string ErrMsg;
   if (uniqueFilename.createTemporaryFileOnDisk(true, &ErrMsg)) {
@@ -359,9 +357,8 @@ Module *BugDriver::ExtractMappedBlocksFromModule(const
   }
   BlocksToNotExtractFile.close();
 
-  const char *uniqueFN = uniqueFilename.c_str();
-  ExtraArg = (char*)malloc(23 + strlen(uniqueFN));
-  strcat(strcpy(ExtraArg, "--extract-blocks-file="), uniqueFN);
+  std::string uniqueFN = "--extract-blocks-file=" + uniqueFilename.str();
+  const char *ExtraArg = uniqueFN.c_str();
 
   std::vector<const PassInfo*> PI;
   std::vector<BasicBlock *> EmptyBBs; // This parameter is ignored.
@@ -370,7 +367,6 @@ Module *BugDriver::ExtractMappedBlocksFromModule(const
 
   if (uniqueFilename.exists())
     uniqueFilename.eraseFromDisk(); // Free disk space
-  free(ExtraArg);
 
   if (Ret == 0) {
     outs() << "*** Basic Block extraction failed, please report a bug!\n";

diff --git a/tools/llvm-ld/llvm-ld.cpp b/tools/llvm-ld/llvm-ld.cpp
index e71aefc0ce78104e0b230dcf334006aa97cc4348..118f6b720c6e9c466215f2101604bfa3a3e9929b 100644 (file)
--- a/tools/llvm-ld/llvm-ld.cpp
+++ b/tools/llvm-ld/llvm-ld.cpp
@@ -179,8 +179,9 @@ static char ** CopyEnv(char ** const envp) {
   // Make a copy of the list.  Don't forget the NULL that ends the list.
   entries = 0;
   while (envp[entries] != NULL) {
-    newenv[entries] = new char[strlen (envp[entries]) + 1];
-    strcpy (newenv[entries], envp[entries]);
+    size_t len = strlen(envp[entries]) + 1;
+    newenv[entries] = new char[len];
+    memcpy(newenv[entries], envp[entries], len);
     ++entries;
   }
   newenv[entries] = NULL;