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[msan] Better diagnostic for invalid origin id. 

llvm-svn: 210331
This commit is contained in:
Evgeniy Stepanov 2014-06-06 12:58:44 +00:00
parent b06b15aa28
commit 9438bf1f62
4 changed files with 8 additions and 7 deletions
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8
compiler-rt/lib/msan/msan.cc
View File

@ -197,10 +197,6 @@ void PrintWarning(uptr pc, uptr bp) {
PrintWarningWithOrigin(pc, bp, __msan_origin_tls);
}
bool OriginIsValid(u32 origin) {
return origin != 0 && origin != (u32)-1;
}
void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin) {
if (msan_expect_umr) {
// Printf("Expected UMR\n");
@ -214,10 +210,10 @@ void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin) {
GET_FATAL_STACK_TRACE_PC_BP(pc, bp);
u32 report_origin =
(__msan_get_track_origins() && OriginIsValid(origin)) ? origin : 0;
(__msan_get_track_origins() && Origin(origin).isValid()) ? origin : 0;
ReportUMR(&stack, report_origin);
if (__msan_get_track_origins() && !OriginIsValid(origin)) {
if (__msan_get_track_origins() && !Origin(origin).isValid()) {
Printf(
" ORIGIN: invalid (%x). Might be a bug in MemorySanitizer origin "
"tracking.\n This could still be a bug in your code, too!\n",

2
compiler-rt/lib/msan/msan_chained_origin_depot.cc
View File

@ -20,7 +20,7 @@ struct ChainedOriginDepotDesc {
u32 here_id;
u32 prev_id;
u32 hash() const { return here_id ^ prev_id; }
bool is_valid() { return true; }
bool is_valid() { return here_id && prev_id; }
};
struct ChainedOriginDepotNode {

1
compiler-rt/lib/msan/msan_origin.h
View File

@ -66,6 +66,7 @@ class Origin {
u32 raw_id() const { return raw_id_; }
bool isStackRoot() const { return raw_id_ == kStackRoot; }
bool isHeapRoot() const { return raw_id_ == kHeapRoot; }
bool isValid() const { return raw_id_ != 0 && raw_id_ != (u32)-1; }
private:
u32 raw_id_;

4
compiler-rt/lib/msan/msan_report.cc
View File

@ -63,6 +63,10 @@ static void DescribeOrigin(u32 id) {
Decorator d;
while (true) {
Origin o(id);
if (!o.isValid()) {
Printf(" %sinvalid origin id(%d)%s\n", d.Warning(), id, d.End());
break;
}
u32 prev_id;
u32 stack_id = ChainedOriginDepotGet(o.id(), &prev_id);
Origin prev_o(prev_id);