[cfi] Make sanstats print address of the check

[vitalybuka]

Summary

Help with off-line symbolization or other type debugging.

[vitalybuka]

ping

[pcc]

Test case?

[vitalybuka]

test

[vitalybuka]

In D53606#1301944, @vitalybuka wrote:

test

done

[vitalybuka]

ping

[pcc]

LGTM

llvm/test/tools/sanstats/elf.test

 # RUN: printf "\x01\x00\x00\x00\x09\x00\x00\x40" >> %t.stats
 # RUN: printf "\x21\x00\x00\x00\x0b\x00\x00\x60" >> %t.stats
 # RUN: printf "\x11\x00\x00\x00\x0c\x00\x00\x80" >> %t.stats
 # RUN: printf "\x01\x00\x00\x00\x0e\x00\x00\xa0" >> %t.stats
 # RUN: printf "\x00\x00\x00\x00\x00\x00\x00\x00" >> %t.stats
 
 # RUN: sanstats %t.stats | FileCheck %s
 
-# CHECK: /tmp{{[/\\]}}f.c:1 f1 cfi-vcall 1
-# CHECK: /tmp{{[/\\]}}f.c:2 f2 cfi-nvcall 2
-# CHECK: /tmp{{[/\\]}}f.c:3 f3 cfi-derived-cast 3
-# CHECK: /tmp{{[/\\]}}f.c:1 f1 cfi-unrelated-cast 4
-# CHECK: /tmp{{[/\\]}}f.c:2 f2 cfi-icall 5
-# CHECK: /tmp{{[/\\]}}f.c:3 f3 <unknown> 6
-
-# CHECK: /tmp{{[/\\]}}f.c:3 f3 cfi-vcall 7
-# CHECK: /tmp{{[/\\]}}f.c:2 f2 cfi-nvcall 8
-# CHECK: /tmp{{[/\\]}}f.c:1 f1 cfi-derived-cast 9
-# CHECK: /tmp{{[/\\]}}f.c:3 f3 cfi-unrelated-cast 11
-# CHECK: /tmp{{[/\\]}}f.c:2 f2 cfi-icall 12
-# CHECK: /tmp{{[/\\]}}f.c:1 f1 <unknown> 14
+# CHECK: 0x0000000000000000 /tmp{{[/\\]}}f.c:1 f1 cfi-vcall 1
+# CHECK: 0x0000000000000010 /tmp{{[/\\]}}f.c:2 f2 cfi-nvcall 2
+# CHECK: 0x0000000000000020 /tmp{{[/\\]}}f.c:3 f3 cfi-derived-cast 3
+# CHECK: 0x0000000000000000 /tmp{{[/\\]}}f.c:1 f1 cfi-unrelated-cast 4
+# CHECK: 0x0000000000000010 /tmp{{[/\\]}}f.c:2 f2 cfi-icall 5
+# CHECK: 0x0000000000000020 /tmp{{[/\\]}}f.c:3 f3 <unknown> 6
+
+# CHECK: 0x0000000000000020 /tmp{{[/\\]}}f.c:3 f3 cfi-vcall 7
+# CHECK: 0x0000000000000010 /tmp{{[/\\]}}f.c:2 f2 cfi-nvcall 8
+# CHECK: 0x0000000000000000 /tmp{{[/\\]}}f.c:1 f1 cfi-derived-cast 9
+# CHECK: 0x0000000000000020 /tmp{{[/\\]}}f.c:3 f3 cfi-unrelated-cast 11
+# CHECK: 0x0000000000000010 /tmp{{[/\\]}}f.c:2 f2 cfi-icall 12
+# CHECK: 0x0000000000000000 /tmp{{[/\\]}}f.c:1 f1 <unknown> 14
 
 --- !ELF
 FileHeader:      
   Class:           ELFCLASS64
   Data:            ELFDATA2LSB
   Type:            ET_REL
   Machine:         EM_X86_64
 Sections:        

llvm/tools/sanstats/sanstats.cpp

while (1) {
     if (Begin == End)
       return nullptr;
 
     // As the instrumentation tracks the return address and not
     // the address of the call to `__sanitizer_stat_report` we
     // remove one from the address to get the correct DI.
     if (Expected<DILineInfo> LineInfo =
             Symbolizer.symbolizeCode(Filename, Addr - 1)) {
-      llvm::outs() << LineInfo->FileName << ':' << LineInfo->Line << ' '
-                   << LineInfo->FunctionName << ' ';
+      llvm::outs() << format_hex(Addr - 1, 18) << ' ' << LineInfo->FileName
+                   << ':' << LineInfo->Line << ' ' << LineInfo->FunctionName
+                   << ' ';
     } else {
       logAllUnhandledErrors(LineInfo.takeError(), llvm::outs(), "<error> ");
     }
 
     switch (KindFromData(Data, SizeofPtr)) {
     case SanStat_CFI_VCall:
       llvm::outs() << "cfi-vcall";
       break;