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Remember where each symbol was defined and where it was referenced. Write this

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information to the object file.


git-svn-id: svn://svn.cc65.org/cc65/trunk@5213 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2011-08-18 16:25:58 +00:00
parent 2f9e7d2ca0
commit c52916f461
4 changed files with 78 additions and 35 deletions
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2
src/ca65/studyexpr.c
View File

@ -510,7 +510,7 @@ static void StudySymbol (ExprNode* Expr, ExprDesc* D)
if (Verbosity > 0) {
DumpExpr (Expr, SymResolve);
}
LIError (&Sym->LineInfos,
LIError (&Sym->DefLines,
"Circular reference in definition of symbol `%m%p'",
GetSymName (Sym));
ED_Invalidate (D);

56
src/ca65/symentry.c
View File

@ -86,8 +86,8 @@ SymEntry* NewSymEntry (const StrBuf* Name, unsigned Flags)
S->Right = 0;
S->Locals = 0;
S->Sym.Tab = 0;
S->LineInfos = EmptyCollection;
GetFullLineInfo (&S->LineInfos);
S->DefLines = EmptyCollection;
S->RefLines = EmptyCollection;
for (I = 0; I < sizeof (S->GuessedUse) / sizeof (S->GuessedUse[0]); ++I) {
S->GuessedUse[I] = 0;
}
@ -149,15 +149,6 @@ int SymSearchTree (SymEntry* T, const StrBuf* Name, SymEntry** E)
void SymRef (SymEntry* S)
/* Mark the given symbol as referenced */
{
/* Mark the symbol as referenced */
S->Flags |= SF_REFERENCED;
}
void SymTransferExprRefs (SymEntry* From, SymEntry* To)
/* Transfer all expression references from one symbol to another. */
{
@ -276,12 +267,16 @@ void SymDef (SymEntry* S, ExprNode* Expr, unsigned char AddrSize, unsigned Flags
*/
if (S->Flags & SF_GLOBAL) {
S->Flags = (S->Flags & ~SF_GLOBAL) | SF_EXPORT;
ReleaseFullLineInfo (&S->DefLines);
}
/* Mark the symbol as defined and use the given address size */
S->Flags |= (SF_DEFINED | Flags);
S->AddrSize = AddrSize;
/* Remember the line info of the symbol definition */
GetFullLineInfo (&S->DefLines);
/* If the symbol is exported, check the address sizes */
if (S->Flags & SF_EXPORT) {
if (S->ExportSize == ADDR_SIZE_DEFAULT) {
@ -289,9 +284,9 @@ void SymDef (SymEntry* S, ExprNode* Expr, unsigned char AddrSize, unsigned Flags
S->ExportSize = S->AddrSize;
} else if (S->AddrSize > S->ExportSize) {
/* We're exporting a symbol smaller than it actually is */
LIWarning (&S->LineInfos, 1, "Symbol `%m%p' is %s but exported %s",
GetSymName (S), AddrSizeToStr (S->AddrSize),
AddrSizeToStr (S->ExportSize));
Warning (1, "Symbol `%m%p' is %s but exported %s",
GetSymName (S), AddrSizeToStr (S->AddrSize),
AddrSizeToStr (S->ExportSize));
}
}
@ -303,6 +298,18 @@ void SymDef (SymEntry* S, ExprNode* Expr, unsigned char AddrSize, unsigned Flags
void SymRef (SymEntry* S)
/* Mark the given symbol as referenced */
{
/* Mark the symbol as referenced */
S->Flags |= SF_REFERENCED;
/* Remember the current location */
CollAppend (&S->RefLines, GetAsmLineInfo ());
}
void SymImport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
/* Mark the given symbol as an imported symbol */
{
@ -345,6 +352,12 @@ void SymImport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
/* Set the symbol data */
S->Flags |= (SF_IMPORT | Flags);
S->AddrSize = AddrSize;
/* Mark the position of the import as the position of the definition.
* Please note: In case of multiple .global or .import statements, the line
* infos add up.
*/
GetFullLineInfo (&S->DefLines);
}
@ -372,6 +385,11 @@ void SymExport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
}
S->Flags &= ~SF_GLOBAL;
/* .GLOBAL remembers line infos in case an .IMPORT follows. We have
* to remove these here.
*/
ReleaseFullLineInfo (&S->DefLines);
}
/* If the symbol was already marked as an export, but wasn't defined
@ -489,6 +507,11 @@ void SymGlobal (SymEntry* S, unsigned char AddrSize, unsigned Flags)
}
S->ExportSize = AddrSize;
S->Flags |= (SF_GLOBAL | Flags);
/* Remember the current location as location of definition in case
* an .IMPORT follows later.
*/
GetFullLineInfo (&S->DefLines);
}
}
@ -555,6 +578,11 @@ void SymConDes (SymEntry* S, unsigned char AddrSize, unsigned Type, unsigned Pri
/* Set the symbol data */
S->Flags |= (SF_EXPORT | SF_REFERENCED);
/* In case we have no line info for the definition, record it now */
if (CollCount (&S->DefLines) == 0) {
GetFullLineInfo (&S->DefLines);
}
}

3
src/ca65/symentry.h
View File

@ -89,7 +89,8 @@ struct SymEntry {
struct SymTable* Tab; /* Table this symbol is in */
struct SymEntry* Entry;
} Sym;
Collection LineInfos; /* Line infos for this symbol */
Collection DefLines; /* Line infos for definition */
Collection RefLines; /* Line infos for references */
FilePos* GuessedUse[1]; /* File position where symbol
* address size was guessed, and the
* smallest possible addressing was NOT

52
src/ca65/symtab.c
View File

@ -470,7 +470,7 @@ static void SymCheckUndefined (SymEntry* S)
if (S->Flags & SF_EXPORT) {
if (Sym->Flags & SF_IMPORT) {
/* The symbol is already marked as import */
LIError (&S->LineInfos,
LIError (&S->RefLines,
"Symbol `%s' is already an import",
GetString (Sym->Name));
}
@ -478,7 +478,7 @@ static void SymCheckUndefined (SymEntry* S)
/* The symbol is already marked as an export. */
if (Sym->AddrSize > S->ExportSize) {
/* We're exporting a symbol smaller than it actually is */
LIWarning (&S->LineInfos, 1,
LIWarning (&S->DefLines, 1,
"Symbol `%m%p' is %s but exported %s",
GetSymName (Sym),
AddrSizeToStr (Sym->AddrSize),
@ -494,7 +494,7 @@ static void SymCheckUndefined (SymEntry* S)
}
if (Sym->AddrSize > Sym->ExportSize) {
/* We're exporting a symbol smaller than it actually is */
LIWarning (&S->LineInfos, 1,
LIWarning (&S->DefLines, 1,
"Symbol `%m%p' is %s but exported %s",
GetSymName (Sym),
AddrSizeToStr (Sym->AddrSize),
@ -502,7 +502,14 @@ static void SymCheckUndefined (SymEntry* S)
}
}
}
Sym->Flags |= (S->Flags & SF_REFERENCED);
if (S->Flags & SF_REFERENCED) {
unsigned I;
Sym->Flags |= SF_REFERENCED;
for (I = 0; I < CollCount (&S->RefLines); ++I) {
CollAppend (&Sym->RefLines, CollAtUnchecked (&S->RefLines, I));
}
CollDeleteAll (&S->RefLines);
}
/* Transfer all expression references */
SymTransferExprRefs (S, Sym);
@ -514,7 +521,7 @@ static void SymCheckUndefined (SymEntry* S)
/* The symbol is definitely undefined */
if (S->Flags & SF_EXPORT) {
/* We will not auto-import an export */
LIError (&S->LineInfos,
LIError (&S->RefLines,
"Exported symbol `%m%p' was never defined",
GetSymName (S));
} else {
@ -523,9 +530,11 @@ static void SymCheckUndefined (SymEntry* S)
S->Flags |= SF_IMPORT;
/* Use the address size for code */
S->AddrSize = CodeAddrSize;
/* Mark point of import */
GetFullLineInfo (&S->DefLines);
} else {
/* Error */
LIError (&S->LineInfos,
LIError (&S->RefLines,
"Symbol `%m%p' is undefined",
GetSymName (S));
}
@ -564,6 +573,7 @@ void SymCheck (void)
/* Handle undefined symbols */
if ((S->Flags & SF_UNDEFMASK) == SF_UNDEFVAL) {
/* This is an undefined symbol. Handle it. */
printf ("Undefined: %s\n", SB_GetConstBuf (GetSymName (S)));
SymCheckUndefined (S);
}
@ -582,20 +592,21 @@ void SymCheck (void)
(S->Flags & SF_UNDEFMASK) != SF_UNDEFVAL) {
/* Check for defined symbols that were never referenced */
if ((S->Flags & SF_DEFINED) != 0 && (S->Flags & SF_REFERENCED) == 0) {
const StrBuf* Name = GetStrBuf (S->Name);
if (SB_At (Name, 0) != '.') { /* Ignore internals */
LIWarning (&S->LineInfos, 2,
"Symbol `%m%p' is defined but never used",
GetSymName (S));
}
}
if (IsSizeOfSymbol (S)) {
/* Remove line infos, we don't need them any longer */
ReleaseFullLineInfo (&S->DefLines);
ReleaseFullLineInfo (&S->RefLines);
} else if ((S->Flags & SF_DEFINED) != 0 && (S->Flags & SF_REFERENCED) == 0) {
LIWarning (&S->DefLines, 2,
"Symbol `%m%p' is defined but never used",
GetSymName (S));
}
/* Assign an index to all imports */
if (S->Flags & SF_IMPORT) {
if ((S->Flags & (SF_REFERENCED | SF_FORCED)) == SF_NONE) {
/* Imported symbol is not referenced */
LIWarning (&S->LineInfos, 2,
LIWarning (&S->DefLines, 2,
"Symbol `%m%p' is imported but never used",
GetSymName (S));
} else {
@ -623,7 +634,7 @@ void SymCheck (void)
S->ExportSize = S->AddrSize;
} else if (S->AddrSize > S->ExportSize) {
/* We're exporting a symbol smaller than it actually is */
LIWarning (&S->LineInfos, 1,
LIWarning (&S->DefLines, 1,
"Symbol `%m%p' is %s but exported %s",
GetSymName (S),
AddrSizeToStr (S->AddrSize),
@ -707,7 +718,8 @@ void WriteImports (void)
ObjWrite8 (S->AddrSize);
ObjWriteVar (S->Name);
WriteLineInfo (&S->LineInfos);
WriteLineInfo (&S->DefLines);
WriteLineInfo (&S->RefLines);
}
S = S->List;
}
@ -787,7 +799,8 @@ void WriteExports (void)
}
/* Write the line infos */
WriteLineInfo (&S->LineInfos);
WriteLineInfo (&S->DefLines);
WriteLineInfo (&S->RefLines);
}
S = S->List;
}
@ -884,7 +897,8 @@ void WriteDbgSyms (void)
}
/* Write the line infos */
WriteLineInfo (&S->LineInfos);
WriteLineInfo (&S->DefLines);
WriteLineInfo (&S->RefLines);
}
S = S->List;
}