[compiler-rt] r204499 - InstrProf: Write the __llvm_profile_write_buffer()
Duncan P. N. Exon Smith
dexonsmith at apple.com
Fri Mar 21 11:29:22 PDT 2014
Author: dexonsmith
Date: Fri Mar 21 13:29:22 2014
New Revision: 204499
URL: http://llvm.org/viewvc/llvm-project?rev=204499&view=rev
Log:
InstrProf: Write the __llvm_profile_write_buffer()
Write __llvm_profile_write_buffer(), which uses the same logic as
__llvm_profile_write_file(), but writes directly to a provided `char*`
buffer instead.
<rdar://problem/15943240>
Modified:
compiler-rt/trunk/lib/profile/InstrProfilingBuffer.c
Modified: compiler-rt/trunk/lib/profile/InstrProfilingBuffer.c
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfilingBuffer.c?rev=204499&r1=204498&r2=204499&view=diff
==============================================================================
--- compiler-rt/trunk/lib/profile/InstrProfilingBuffer.c (original)
+++ compiler-rt/trunk/lib/profile/InstrProfilingBuffer.c Fri Mar 21 13:29:22 2014
@@ -10,5 +10,48 @@
#include "InstrProfiling.h"
#include <string.h>
-/* TODO: uint64_t __llvm_profile_get_size_for_buffer(void) */
-/* TODO: int __llvm_profile_write_buffer(char *Buffer) */
+uint64_t __llvm_profile_get_size_for_buffer(void) {
+ return sizeof(uint64_t) * 7 +
+ PROFILE_RANGE_SIZE(data) * sizeof(__llvm_profile_data) +
+ PROFILE_RANGE_SIZE(counters) * sizeof(uint64_t) +
+ PROFILE_RANGE_SIZE(names) * sizeof(char);
+}
+
+int __llvm_profile_write_buffer(char *Buffer) {
+ const __llvm_profile_data *DataBegin = __llvm_profile_data_begin();
+ const __llvm_profile_data *DataEnd = __llvm_profile_data_end();
+ const uint64_t *CountersBegin = __llvm_profile_counters_begin();
+ const uint64_t *CountersEnd = __llvm_profile_counters_end();
+ const char *NamesBegin = __llvm_profile_names_begin();
+ const char *NamesEnd = __llvm_profile_names_end();
+
+ /* Calculate size of sections. */
+ const uint64_t DataSize = DataEnd - DataBegin;
+ const uint64_t CountersSize = CountersEnd - CountersBegin;
+ const uint64_t NamesSize = NamesEnd - NamesBegin;
+
+ /* Create the header. */
+ uint64_t Header[] = {
+ __llvm_profile_get_magic(),
+ __llvm_profile_get_version(),
+ DataSize,
+ CountersSize,
+ NamesSize,
+ (uint64_t)CountersBegin,
+ (uint64_t)NamesBegin
+ };
+
+ /* Write the data. */
+#define UPDATE_memcpy(Data, Size) \
+ do { \
+ memcpy(Buffer, Data, Size); \
+ Buffer += Size; \
+ } while (0)
+ UPDATE_memcpy(Header, sizeof(Header));
+ UPDATE_memcpy(DataBegin, DataSize * sizeof(__llvm_profile_data));
+ UPDATE_memcpy(CountersBegin, CountersSize * sizeof(uint64_t));
+ UPDATE_memcpy(NamesBegin, NamesSize * sizeof(char));
+#undef UPDATE_memcpy
+
+ return 0;
+}
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