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Add --protect-ids to obscure information in objects, bug1521.

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This commit is contained in:
Wilson Snyder
2019-10-06 13:24:21 -04:00
parent ed1e5fb509
commit 91f1acd85f
30 changed files with 723 additions and 138 deletions
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src/V3Options.cpp
+36
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@@ -534,6 +534,25 @@ void V3Options::notify() {
&& !cdc()) {
v3fatal("verilator: Need --cc, --sc, --cdc, --lint-only, --xml_only or --E option");
}
if (protectIds()) {
FileLine* cmdfl = new FileLine(FileLine::commandLineFilename());
if (allPublic()) {
// We always call protect() on names, we don't check if public or not
// Hence any external references wouldn't be able to find the refed public object.
cmdfl->v3error("Unsupported: Using --protect-ids with --public\n"
+V3Error::warnMore()+"... Suggest remove --public.");
}
if (trace()) {
cmdfl->v3warn(INSECURE,
"Using --protect-ids with --trace may expose private design details\n"
+V3Error::warnMore()+"... Suggest remove --trace.");
}
if (vpi()) {
cmdfl->v3warn(INSECURE,
"Using --protect-ids with --vpi may expose private design details\n"
+V3Error::warnMore()+"... Suggest remove --vpi.");
}
}
}
//######################################################################
@@ -545,6 +564,16 @@ string V3Options::version() {
return ver;
}
string V3Options::protectKeyDefaulted() {
if (m_protectKey.empty()) {
// Create a key with a human-readable symbol-like name.
// This conversion drops ~2 bits of entropy out of 256, shouldn't matter.
VHashSha256 digest (V3Os::trueRandom(32));
m_protectKey = digest.digestSymbol();
}
return m_protectKey;
}
void V3Options::throwSigsegv() {
#if !(defined(VL_CPPCHECK) || defined(__clang_analyzer__))
char* zp=NULL; *zp=0; // Intentional core dump, ignore warnings here
@@ -687,6 +716,7 @@ void V3Options::parseOptsList(FileLine* fl, const string& optdir, int argc, char
else if ( onoff (sw, "-debug-leak", flag/*ref*/)) { m_debugLeak = flag; }
else if ( onoff (sw, "-debug-nondeterminism", flag/*ref*/)){ m_debugNondeterminism = flag; }
else if ( onoff (sw, "-debug-partition", flag/*ref*/)){ m_debugPartition = flag; } // Undocumented
else if ( onoff (sw, "-debug-protect", flag/*ref*/)){ m_debugProtect = flag; } // Undocumented
else if ( onoff (sw, "-debug-self-test", flag/*ref*/)){ m_debugSelfTest = flag; } // Undocumented
else if (!strcmp(sw, "-debug-sigsegv")) { throwSigsegv(); } // Undocumented, see also --debug-abort
else if (!strcmp(sw, "-debug-fatalsrc")) { v3fatalSrc("--debug-fatal-src"); } // Undocumented, see also --debug-abort
@@ -709,6 +739,7 @@ void V3Options::parseOptsList(FileLine* fl, const string& optdir, int argc, char
else if ( onoff (sw, "-prof-cfuncs", flag/*ref*/)) { m_profCFuncs = flag; }
else if ( onoff (sw, "-profile-cfuncs", flag/*ref*/)) { m_profCFuncs = flag; } // Undocumented, for backward compat
else if ( onoff (sw, "-prof-threads", flag/*ref*/)) { m_profThreads = flag; }
else if ( onoff (sw, "-protect-ids", flag/*ref*/)) { m_protectIds = flag; }
else if ( onoff (sw, "-public", flag/*ref*/)) { m_public = flag; }
else if ( onoff (sw, "-public-flat-rw", flag/*ref*/) ) { m_publicFlatRW = flag; v3Global.dpi(true); }
else if (!strncmp(sw, "-pvalue+", strlen("-pvalue+"))) { addParameter(string(sw+strlen("-pvalue+")), false); }
@@ -1056,6 +1087,9 @@ void V3Options::parseOptsList(FileLine* fl, const string& optdir, int argc, char
shift; m_prefix = argv[i];
if (m_modPrefix=="") m_modPrefix = m_prefix;
}
else if (!strcmp(sw, "-protect-key") && (i+1)<argc) {
shift; m_protectKey = argv[i];
}
else if (!strcmp(sw, "-no-threads")) { m_threads = 0; } // Undocumented until functional
else if (!strcmp(sw, "-threads") && (i+1)<argc) { // Undocumented until functional
shift; m_threads = atoi(argv[i]);
@@ -1290,6 +1324,7 @@ V3Options::V3Options() {
m_debugLeak = true;
m_debugNondeterminism = false;
m_debugPartition = false;
m_debugProtect = false;
m_debugSelfTest = false;
m_decoration = true;
m_dpiHdrOnly = false;
@@ -1309,6 +1344,7 @@ V3Options::V3Options() {
m_ppComments = false;
m_profCFuncs = false;
m_profThreads = false;
m_protectIds = false;
m_preprocOnly = false;
m_preprocNoLine = false;
m_public = false;