commit e962930d19efd198920df2f77b95f78f3b394751
author Stephen Crane <sjc@immunant.com> Mon Nov 16 18:00:53 2020 -0800
committer Stephen Crane <sjc@immunant.com> Mon Dec 14 22:06:13 2020 -0800
tree bdd8b656e76f06e92e37ed0a3fb8689bb329b3e7
parent 5a611cb8346877493929582855d8bcbbfd8f3dbf

trusty: Retrieve coverage PCs from coverage record

Adds the ability to retrieve and save program counter information from
the trusty coverage record data. PC information is saved to a .sancov
file, parseable by the LLVM sancov tool. Sancov can then symbolize and
display this coverage information for consumption by humans.

Adds a sancov dump to the libtrusty_coverage_test for testing.

Bug: 175221942
Test: atest libtrusty_coverage_test
Test: Retrieve sancov file and manually symbolize with sancov
Change-Id: I342ea2ca9abb87986b2904ff69415544ee6070fc

trusty/fuzz/counters.cpp

diff --git a/trusty/fuzz/counters.cpp b/trusty/fuzz/counters.cpp
index 3fc9f48..8c79475 100644
--- a/trusty/fuzz/counters.cpp
+++ b/trusty/fuzz/counters.cpp
@@ -42,9 +42,9 @@
     assert(fuzzer::ExtraCountersBegin());
     assert(fuzzer::ExtraCountersEnd());
 
-    uint8_t* begin = NULL;
-    uint8_t* end = NULL;
-    record_->GetRawData((volatile void**)&begin, (volatile void**)&end);
+    volatile uint8_t* begin = NULL;
+    volatile uint8_t* end = NULL;
+    record_->GetRawCounts(&begin, &end);
     assert(end - begin <= sizeof(counters));
 }
 
@@ -53,7 +53,7 @@
 }
 
 void ExtraCounters::Reset() {
-    record_->Reset();
+    record_->ResetCounts();
     fuzzer::ClearExtraCounters();
 }
 
@@ -61,7 +61,7 @@
     volatile uint8_t* begin = NULL;
     volatile uint8_t* end = NULL;
 
-    record_->GetRawData((volatile void**)&begin, (volatile void**)&end);
+    record_->GetRawCounts(&begin, &end);
 
     size_t num_counters = end - begin;
     for (size_t i = 0; i < num_counters; i++) {