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Adding a collector name attribute to Function in the IR. These

Browse Source 
methods are new to Function:

  bool hasCollector() const;
  const std::string &getCollector() const;
  void setCollector(const std::string &);
  void clearCollector();

The assembly representation is as such:

  define void @f() gc "shadow-stack" { ...

The implementation uses an on-the-side table to map Functions to 
collector names, such that there is no overhead. A StringPool is 
further used to unique collector names, which are extremely
likely to be unique per process.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44769 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Gordon Henriksen
2007-12-10 03:18:06 +00:00
parent afba8fe662
commit 80a75bfae9
21 changed files with 1468 additions and 1250 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
lib/Bitcode/Reader/BitcodeReader.cpp
View File

@ -849,6 +849,7 @@ bool BitcodeReader::ParseModule(const std::string &ModuleID) {
SmallVector<uint64_t, 64> Record;
std::vector<std::string> SectionTable;
std::vector<std::string> CollectorTable;
// Read all the records for this module.
while (!Stream.AtEndOfStream()) {
@ -974,6 +975,13 @@ bool BitcodeReader::ParseModule(const std::string &ModuleID) {
SectionTable.push_back(S);
break;
}
case bitc::MODULE_CODE_COLLECTORNAME: { // SECTIONNAME: [strchr x N]
std::string S;
if (ConvertToString(Record, 0, S))
return Error("Invalid MODULE_CODE_COLLECTORNAME record");
CollectorTable.push_back(S);
break;
}
// GLOBALVAR: [type, isconst, initid,
// linkage, alignment, section, visibility, threadlocal]
case bitc::MODULE_CODE_GLOBALVAR: {
@ -1016,7 +1024,7 @@ bool BitcodeReader::ParseModule(const std::string &ModuleID) {
break;
}
// FUNCTION: [type, callingconv, isproto, linkage, paramattr,
// alignment, section, visibility]
// alignment, section, visibility, collector]
case bitc::MODULE_CODE_FUNCTION: {
if (Record.size() < 8)
return Error("Invalid MODULE_CODE_FUNCTION record");
@ -1044,6 +1052,11 @@ bool BitcodeReader::ParseModule(const std::string &ModuleID) {
Func->setSection(SectionTable[Record[6]-1]);
}
Func->setVisibility(GetDecodedVisibility(Record[7]));
if (Record.size() > 8 && Record[8]) {
if (Record[8]-1 > CollectorTable.size())
return Error("Invalid collector ID");
Func->setCollector(CollectorTable[Record[8]-1].c_str());
}
ValueList.push_back(Func);