d0b9a0cb98
Calling `throw dst_end_of_data_exception()` when the desired number of cycles has been reached means that the fst reader can't tidy up after itself and leads to memory leaks. This doesn't happen when the `-stop` flag is used because the `Yosys::FstData` struct tracks the end time and skips the outer callback if the simulation has gone past the desired end time. Move cycle checking into the inner callback along with the time checking means that the outer callback no longer needs to throw an exception in order to stop checking further values, while still allowing the fst reader to finish reading and deallocate memory.
283 lines
8.1 KiB
C++
283 lines
8.1 KiB
C++
/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2022 Miodrag Milanovic <micko@yosyshq.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "kernel/fstdata.h"
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USING_YOSYS_NAMESPACE
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static std::string file_base_name(std::string const & path)
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{
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return path.substr(path.find_last_of("/\\") + 1);
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}
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FstData::FstData(std::string filename) : ctx(nullptr)
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{
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#if !defined(YOSYS_DISABLE_SPAWN)
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std::string filename_trim = file_base_name(filename);
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if (filename_trim.size() > 4 && filename_trim.compare(filename_trim.size()-4, std::string::npos, ".vcd") == 0) {
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filename_trim.erase(filename_trim.size()-4);
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tmp_file = stringf("%s/converted_%s.fst", get_base_tmpdir().c_str(), filename_trim.c_str());
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std::string cmd = stringf("vcd2fst %s %s", filename.c_str(), tmp_file.c_str());
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log("Exec: %s\n", cmd.c_str());
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if (run_command(cmd) != 0)
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log_cmd_error("Shell command failed!\n");
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filename = tmp_file;
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}
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#endif
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const std::vector<std::string> g_units = { "s", "ms", "us", "ns", "ps", "fs", "as", "zs" };
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ctx = (fstReaderContext *)fstReaderOpen(filename.c_str());
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if (!ctx)
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log_error("Error opening '%s' as FST file\n", filename.c_str());
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int scale = (int)fstReaderGetTimescale(ctx);
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timescale = pow(10.0, scale);
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timescale_str = "";
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int unit = 0;
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int zeros = 0;
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if (scale > 0) {
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zeros = scale;
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} else {
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if ((scale % 3) == 0) {
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zeros = (-scale % 3);
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unit = (-scale / 3);
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} else {
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zeros = 3 - (-scale % 3);
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unit = (-scale / 3) + 1;
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}
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}
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for (int i=0;i<zeros; i++) timescale_str += "0";
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timescale_str += g_units[unit];
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extractVarNames();
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}
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FstData::~FstData()
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{
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if (ctx)
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fstReaderClose(ctx);
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if (!tmp_file.empty())
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remove(tmp_file.c_str());
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}
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uint64_t FstData::getStartTime() { return fstReaderGetStartTime(ctx); }
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uint64_t FstData::getEndTime() { return fstReaderGetEndTime(ctx); }
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static void normalize_brackets(std::string &str)
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{
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for (auto &c : str) {
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if (c == '<')
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c = '[';
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else if (c == '>')
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c = ']';
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}
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}
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fstHandle FstData::getHandle(std::string name) {
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normalize_brackets(name);
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if (name_to_handle.find(name) != name_to_handle.end())
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return name_to_handle[name];
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else
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return 0;
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};
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dict<int,fstHandle> FstData::getMemoryHandles(std::string name) {
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if (memory_to_handle.find(name) != memory_to_handle.end())
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return memory_to_handle[name];
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else
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return dict<int,fstHandle>();
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};
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static std::string remove_spaces(std::string str)
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{
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str.erase(std::remove(str.begin(), str.end(), ' '), str.end());
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return str;
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}
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void FstData::extractVarNames()
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{
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struct fstHier *h;
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std::string fst_scope_name;
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while ((h = fstReaderIterateHier(ctx))) {
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switch (h->htyp) {
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case FST_HT_SCOPE: {
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fst_scope_name = fstReaderPushScope(ctx, h->u.scope.name, NULL);
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break;
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}
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case FST_HT_UPSCOPE: {
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fst_scope_name = fstReaderPopScope(ctx);
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break;
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}
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case FST_HT_VAR: {
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FstVar var;
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var.id = h->u.var.handle;
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var.is_alias = h->u.var.is_alias;
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var.is_reg = (fstVarType)h->u.var.typ == FST_VT_VCD_REG;
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var.name = remove_spaces(h->u.var.name);
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var.scope = fst_scope_name;
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normalize_brackets(var.scope);
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var.width = h->u.var.length;
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vars.push_back(var);
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if (!var.is_alias)
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handle_to_var[h->u.var.handle] = var;
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std::string clean_name;
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bool has_space = false;
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for(size_t i=0;i<strlen(h->u.var.name);i++)
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{
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char c = h->u.var.name[i];
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if(c==' ') { has_space = true; break; }
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clean_name += c;
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}
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if (clean_name[0]=='\\')
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clean_name = clean_name.substr(1);
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if (!has_space) {
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size_t pos = clean_name.find_last_of("[");
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std::string index_or_range = clean_name.substr(pos+1);
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if (index_or_range.find(":") != std::string::npos) {
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clean_name = clean_name.substr(0,pos);
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}
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}
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size_t pos = clean_name.find_last_of("<");
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if (pos != std::string::npos && clean_name.back() == '>') {
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std::string mem_cell = clean_name.substr(0, pos);
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normalize_brackets(mem_cell);
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std::string addr = clean_name.substr(pos+1);
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addr.pop_back(); // remove closing bracket
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char *endptr;
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int mem_addr = strtol(addr.c_str(), &endptr, 16);
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if (*endptr) {
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log_debug("Error parsing memory address in : %s\n", clean_name.c_str());
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} else {
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memory_to_handle[var.scope+"."+mem_cell][mem_addr] = var.id;
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}
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}
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pos = clean_name.find_last_of("[");
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if (pos != std::string::npos && clean_name.back() == ']') {
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std::string mem_cell = clean_name.substr(0, pos);
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normalize_brackets(mem_cell);
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std::string addr = clean_name.substr(pos+1);
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addr.pop_back(); // remove closing bracket
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char *endptr;
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int mem_addr = strtol(addr.c_str(), &endptr, 10);
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if (*endptr) {
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log_debug("Error parsing memory address in : %s\n", clean_name.c_str());
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} else {
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memory_to_handle[var.scope+"."+mem_cell][mem_addr] = var.id;
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}
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}
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normalize_brackets(clean_name);
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name_to_handle[var.scope+"."+clean_name] = h->u.var.handle;
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break;
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}
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}
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}
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}
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static void reconstruct_clb_varlen_attimes(void *user_data, uint64_t pnt_time, fstHandle pnt_facidx, const unsigned char *pnt_value, uint32_t plen)
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{
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FstData *ptr = (FstData*)user_data;
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ptr->reconstruct_callback_attimes(pnt_time, pnt_facidx, pnt_value, plen);
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}
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static void reconstruct_clb_attimes(void *user_data, uint64_t pnt_time, fstHandle pnt_facidx, const unsigned char *pnt_value)
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{
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FstData *ptr = (FstData*)user_data;
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uint32_t plen = (pnt_value) ? strlen((const char *)pnt_value) : 0;
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ptr->reconstruct_callback_attimes(pnt_time, pnt_facidx, pnt_value, plen);
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}
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void FstData::reconstruct_callback_attimes(uint64_t pnt_time, fstHandle pnt_facidx, const unsigned char *pnt_value, uint32_t /* plen */)
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{
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if (pnt_time > end_time || !pnt_value) return;
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if (curr_cycle > last_cycle) return;
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// if we are past the timestamp
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bool is_clock = false;
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if (!all_samples) {
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for(auto &s : clk_signals) {
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if (s==pnt_facidx) {
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is_clock=true;
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break;
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}
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}
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}
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if (pnt_time > past_time) {
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past_data = last_data;
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past_time = pnt_time;
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}
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if (pnt_time > last_time) {
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if (all_samples) {
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callback(last_time);
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curr_cycle++;
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last_time = pnt_time;
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} else {
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if (is_clock) {
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std::string val = std::string((const char *)pnt_value);
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std::string prev = past_data[pnt_facidx];
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if ((prev!="1" && val=="1") || (prev!="0" && val=="0")) {
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callback(last_time);
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curr_cycle++;
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last_time = pnt_time;
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}
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}
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}
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}
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// always update last_data
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last_data[pnt_facidx] = std::string((const char *)pnt_value);
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}
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void FstData::reconstructAllAtTimes(std::vector<fstHandle> &signal, uint64_t start, uint64_t end, unsigned int end_cycle, CallbackFunction cb)
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{
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clk_signals = signal;
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callback = cb;
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start_time = start;
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end_time = end;
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curr_cycle = 0;
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last_cycle = end_cycle;
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last_data.clear();
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last_time = start_time;
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past_data.clear();
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past_time = start_time;
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all_samples = clk_signals.empty();
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fstReaderSetUnlimitedTimeRange(ctx);
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fstReaderSetFacProcessMaskAll(ctx);
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fstReaderIterBlocks2(ctx, reconstruct_clb_attimes, reconstruct_clb_varlen_attimes, this, nullptr);
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if (last_time!=end_time && curr_cycle < last_cycle) {
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past_data = last_data;
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callback(last_time);
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curr_cycle++;
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}
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if (curr_cycle < last_cycle) {
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past_data = last_data;
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callback(end_time);
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curr_cycle++;
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}
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}
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std::string FstData::valueOf(fstHandle signal)
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{
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if (past_data.find(signal) == past_data.end()) {
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return std::string(handle_to_var[signal].width, 'x');
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}
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return past_data[signal];
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}
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