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Now using a dedicated ELF section for all coverage counters

This commit is contained in:
Clifford Wolf 2014-07-24 15:05:05 +02:00
parent 22ede43b3f
commit 7679000673
3 changed files with 21 additions and 26 deletions
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6
kernel/driver.cc
View File

@ -760,7 +760,7 @@ int main(int argc, char **argv)
f = fdopen(mkstemps(filename_buffer, 4), "w");
} else {
snprintf(filename_buffer, 4096, "%s", getenv("YOSYS_COVER_FILE"));
f = fopen(filename_buffer, "w");
f = fopen(filename_buffer, "a+");
}
if (f == NULL)
@ -769,11 +769,11 @@ int main(int argc, char **argv)
log("<writing coverage file \"%s\">\n", filename_buffer);
std::map<std::string, std::pair<std::string, int>> coverage_data;
for (CoverAgent *p = CoverAgent::first_cover_agent; p; p = p->next_cover_agent) {
for (CoverData *p = __start_yosys_cover_list; p != __stop_yosys_cover_list; p++) {
if (coverage_data.count(p->id))
log("WARNING: found duplicate coverage id \"%s\".\n", p->id);
coverage_data[p->id].first = stringf("%s:%d:%s", p->file, p->line, p->func);
coverage_data[p->id].second += p->ticks;
coverage_data[p->id].second += p->counter;
}
for (auto &it : coverage_data)

2
kernel/log.cc
View File

@ -29,8 +29,6 @@
#include <vector>
#include <list>
CoverAgent *CoverAgent::first_cover_agent = NULL;
std::vector<FILE*> log_files;
FILE *log_errfile = NULL;
bool log_time = false;

39
kernel/log.h
View File

@ -63,34 +63,31 @@ void log_cell(RTLIL::Cell *cell, std::string indent = "");
#define log_assert(_assert_expr_) do { if (_assert_expr_) break; log_error("Assert `%s' failed in %s:%d.\n", #_assert_expr_, __FILE__, __LINE__); } while (0)
#define log_ping() log("-- %s:%d %s --\n", __FILE__, __LINE__, __PRETTY_FUNCTION__)
// ---------------------------------------------------
// This is the magic behind the code coverage counters
// ---------------------------------------------------
struct CoverData {
const char *file, *func, *id;
int line, counter;
} __attribute__ ((packed));
// this two symbols are created by the linker for the "yosys_cover_list" ELF section
#ifndef NDEBUG
extern "C" struct CoverData __start_yosys_cover_list[];
extern "C" struct CoverData __stop_yosys_cover_list[];
#endif
#ifndef NDEBUG
# define cover(_id) do { \
static CoverAgent _cover_agent(__FILE__, __LINE__, __FUNCTION__, _id); \
_cover_agent.ticks++; \
static CoverData __d __attribute__((section("yosys_cover_list"), aligned(1))) = { __FILE__, __FUNCTION__, _id, __LINE__, 0 }; \
__d.counter++; \
} while (0)
#else
# define cover(_id) do { } while (0)
#endif
struct CoverAgent
{
static struct CoverAgent *first_cover_agent;
struct CoverAgent *next_cover_agent;
const char *file;
int line;
const char *func;
const char *id;
int ticks;
CoverAgent(const char *file, int line, const char *func, const char *id) :
file(file), line(line), func(func), id(id), ticks(0)
{
next_cover_agent = first_cover_agent;
first_cover_agent = this;
};
};
// ------------------------------------------------------------
// everything below this line are utilities for troubleshooting