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MemTracer able to read and write according to trace file, also support thread_id skipping in trace file

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This commit is contained in:
Vamber Yang
2023-03-08 17:34:10 -08:00
parent 41ecf6bc20
commit 0de09daa05
4 changed files with 110 additions and 14 deletions
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18
src/main/resources/csrc/SimMemTrace.cc
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@@ -3,6 +3,7 @@
#include <svdpi.h>
#endif
#include <string>
#include <string.h>
#include <cstdio>
#include <cassert>
#include <unistd.h>
@@ -66,16 +67,23 @@ MemTraceLine MemTraceReader::read_trace_at(const long cycle,
assert(false && "some trace lines are left unread in the past");
}
if (line.thread_id != thread_id) {
line.valid = false;
}
if (line.cycle > cycle) {
// We haven't reached the cycle mark specified in this line yet, so we don't
// read it right now.
return MemTraceLine{};
} else if (line.cycle == cycle) {
printf("fire! cycle=%ld, valid=%d\n", cycle, line.valid);
} else if (line.cycle == cycle && line.thread_id == thread_id) {
printf("fire! cycle=%ld, valid=%d, %s \n", cycle, line.valid, line.loadstore);
// FIXME! Currently thread_id is assumed to be in round-robin order, e.g.
// 0->1->2->3->0->..., both in the trace file and the order the caller calls
// this function. If this is not true, we cannot simply monotonically
// increment read_pos.
// Only advance pointer when cycle and threa_id both match
// now increaseing sequence is fine (0, 1, 3), but unordered is not fine (0, 3, 1)
++read_pos;
}
@@ -96,6 +104,9 @@ extern "C" void memtrace_query(unsigned char trace_read_ready,
int trace_read_thread_id,
unsigned char *trace_read_valid,
unsigned long *trace_read_address,
unsigned char *trace_read_is_store,
int *trace_read_store_mask,
unsigned long *trace_read_data,
unsigned char *trace_read_finished) {
// printf("memtrace_query(cycle=%ld, tid=%d)\n", trace_read_cycle,
// trace_read_thread_id);
@@ -107,6 +118,9 @@ extern "C" void memtrace_query(unsigned char trace_read_ready,
auto line = reader->read_trace_at(trace_read_cycle, trace_read_thread_id);
*trace_read_valid = line.valid;
*trace_read_address = line.address;
*trace_read_is_store = strcmp(line.loadstore, "STORE") == 0 ;
*trace_read_store_mask = line.data_size;
*trace_read_data = line.data;
// This means finished and valid will go up at the same cycle. Need to
// handle this without skipping the last line.
*trace_read_finished = reader->finished();