Author: kcc
Date: Fri Aug 25 12:29:47 2017
New Revision: 311794
URL: http://llvm.org/viewvc/llvm-project?rev=311794&view=rev
Log:
[sanitizer-coverage] extend fsanitize-coverage=pc-table with flags for every PC
Modified:
cfe/trunk/docs/SanitizerCoverage.rst
Modified: cfe/trunk/docs/SanitizerCoverage.rst
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/SanitizerCoverage.rst?rev=311794&r1=311793&r2=311794&view=diff
==============================================================================
--- cfe/trunk/docs/SanitizerCoverage.rst (original)
+++ cfe/trunk/docs/SanitizerCoverage.rst Fri Aug 25 12:29:47 2017
@@ -148,19 +148,21 @@ With ``-fsanitize-coverage=pc-table`` th
instrumented PCs. Requires either ``-fsanitize-coverage=inline-8bit-counters``
or
``-fsanitize-coverage=trace-pc-guard``.
-Users need to implement a single function to capture the counters at startup:
+Users need to implement a single function to capture the PC table at startup:
.. code-block:: c++
extern "C"
- void __sanitizer_cov_pcs_init(const uint8_t *pcs_beg,
- const uint8_t *pcs_end) {
+ void __sanitizer_cov_pcs_init(const uintptr_t *pcs_beg,
+ const uintptr_t *pcs_end) {
// [pcs_beg,pcs_end) is the array of ptr-sized integers representing
- // PCs of the instrumented blocks in the current DSO.
- // Capture this array in order to read the PCs.
- // The number of PCs for a given DSO is the same as the number of
- // 8-bit counters (-fsanitize-coverage=inline-8bit-counters) or
+ // pairs [PC,PCFlags] for every instrumented block in the current DSO.
+ // Capture this array in order to read the PCs and their Flags.
+ // The number of PCs and PCFlags for a given DSO is the same as the number
+ // of 8-bit counters (-fsanitize-coverage=inline-8bit-counters) or
// trace_pc_guard callbacks (-fsanitize-coverage=trace-pc-guard)
+ // A PCFlags describes the basic block:
+ // * bit0: 1 if the block is the function entry block, 0 otherwise.
}
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