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Ensure that new_id(_suffix)() cannot create collisions with existing IdStrings.

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Robert O'Callahan 2025-10-13 00:44:15 +00:00
parent bf732df591
commit 442a969812
1 changed files with 11 additions and 0 deletions
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11
kernel/rtlil.h
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@ -23,6 +23,7 @@
#include "kernel/yosys_common.h"
#include "kernel/yosys.h"
#include <charconv>
#include <string_view>
#include <unordered_map>
@ -199,6 +200,16 @@ struct RTLIL::IdString
if ((unsigned)ch <= (unsigned)' ')
log_error("Found control character or space (0x%02x) in string '%s' which is not allowed in RTLIL identifiers\n", ch, std::string(p).c_str());
if (p.substr(0, 6) == "$auto$") {
// Ensure new_id(_suffix) will not create collisions.
size_t autoidx_pos = p.find_last_of('$');
int p_autoidx;
std::string_view v = p.substr(autoidx_pos + 1);
if (std::from_chars(v.begin(), v.end(), p_autoidx).ec == std::errc()) {
autoidx = std::max(autoidx, p_autoidx + 1);
}
}
#ifndef YOSYS_NO_IDS_REFCNT
if (global_free_idx_list_.empty()) {
log_assert(global_id_storage_.size() < 0x40000000);