[esan] Add __esan_report for mid-run data

Summary:
Adds a new public interface routine __esan_report() which can be used to
request profiling results prior to abnormal termination (e.g., for a server
process killed by its parent where the normal exit does not allow for
normal result reporting).

Implements this for the working-set tool.  The cache frag tool is left
unimplemented as it requires missing iteration capabilities.

Adds a new test.

Reviewers: aizatsky

Subscribers: vitalybuka, zhaoqin, kcc, eugenis, llvm-commits, kubabrecka

Differential Revision: http://reviews.llvm.org/D22098

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@274964 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/esan/esan.cpp b/lib/esan/esan.cpp
index 970f91a83..3c69b4e91 100644
--- a/lib/esan/esan.cpp
+++ b/lib/esan/esan.cpp
@@ -228,6 +228,15 @@ int finalizeLibrary() {
   return 0;
 }
 
+void reportResults() {
+  VPrintf(1, "in esan::%s\n", __FUNCTION__);
+  if (__esan_which_tool == ESAN_CacheFrag) {
+    return reportCacheFrag();
+  } else if (__esan_which_tool == ESAN_WorkingSet) {
+    return reportWorkingSet();
+  }
+}
+
 void processCompilationUnitInit(void *Ptr) {
   VPrintf(2, "in esan::%s\n", __FUNCTION__);
   if (__esan_which_tool == ESAN_CacheFrag) {