jyapayne/Nim
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Unexport even more symbols (#13214)

Browse source 
* system/gc: don't export markStackAndRegisters

* compiler/cgen: unexport internal symbols

As these functions are Nim-specific walkaround against C's optimization
schemes, they don't serve any purpose being exported.

* compiler/cgen: don't export global var unless marked

* compiler/ccgthreadvars: don't export threadvar unless marked

* tests/dll/visibility: also check for exports

This ensure that these changes don't break manual exports.

* compiler/cgen: hide all variables created for constants

* compiler/ccgtypes: don't export RTTI variables

* compiler/ccgexprs: make all complex const static

* nimbase.h: fix export for windows

* compiler/cgen, ccgthreadvars: export variables correctly

For C/C++ variables, `extern` means that the variable is defined in an
another unit. Added a new N_LIB_EXPORT_VAR to correctly export
variables.
This commit is contained in:
alaviss 2020-01-23 12:45:31 +00:00 • committed by Andreas Rumpf
commit f500895efe
7 changed files with 52 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

18
compiler/cgen.nim
View file

@ -549,6 +549,8 @@ proc assignGlobalVar(p: BProc, n: PNode; value: Rope) =
decl.addf "NIM_ALIGN($1) ", [rope(s.alignment)]
if p.hcrOn: decl.add("static ")
elif sfImportc in s.flags: decl.add("extern ")
elif lfExportLib in s.loc.flags: decl.add("N_LIB_EXPORT_VAR ")
else: decl.add("N_LIB_PRIVATE ")
if s.kind == skLet and value != nil: decl.add("NIM_CONST ")
decl.add(td)
if p.hcrOn: decl.add("*")
@ -1175,7 +1177,7 @@ proc requestConstImpl(p: BProc, sym: PSym) =
var q = findPendingModule(m, sym)
if q != nil and not containsOrIncl(q.declaredThings, sym.id):
assert q.initProc.module == q
q.s[cfsData].addf("NIM_CONST $1 $2 = $3;$n",
q.s[cfsData].addf("N_LIB_PRIVATE NIM_CONST $1 $2 = $3;$n",
[getTypeDesc(q, sym.typ), sym.loc.r, genBracedInit(q.initProc, sym.ast, isConst = true)])
# declare header:
if q != m and not containsOrIncl(m.declaredThings, sym.id):
@ -1316,19 +1318,19 @@ proc genMainProc(m: BModule) =
const
# not a big deal if we always compile these 3 global vars... makes the HCR code easier
PosixCmdLine =
"int cmdCount;$N" &
"char** cmdLine;$N" &
"char** gEnv;$N"
"N_LIB_PRIVATE int cmdCount;$N" &
"N_LIB_PRIVATE char** cmdLine;$N" &
"N_LIB_PRIVATE char** gEnv;$N"
# The use of a volatile function pointer to call Pre/NimMainInner
# prevents inlining of the NimMainInner function and dependent
# functions, which might otherwise merge their stack frames.
PreMainBody = "$N" &
"void PreMainInner(void) {$N" &
"N_LIB_PRIVATE void PreMainInner(void) {$N" &
"$2" &
"}$N$N" &
PosixCmdLine &
"void PreMain(void) {$N" &
"N_LIB_PRIVATE void PreMain(void) {$N" &
"\tvoid (*volatile inner)(void);$N" &
"\tinner = PreMainInner;$N" &
"$1" &
@ -1341,7 +1343,7 @@ proc genMainProc(m: BModule) =
MainProcsWithResult =
MainProcs & ("\treturn $1nim_program_result;$N")
NimMainInner = "N_CDECL(void, NimMainInner)(void) {$N" &
NimMainInner = "N_LIB_PRIVATE N_CDECL(void, NimMainInner)(void) {$N" &
"$1" &
"}$N$N"
@ -1388,7 +1390,7 @@ proc genMainProc(m: BModule) =
PosixNimDllMain = WinNimDllMain
PosixCDllMain =
"void NIM_POSIX_INIT NimMainInit(void) {$N" &
"N_LIB_PRIVATE void NIM_POSIX_INIT NimMainInit(void) {$N" &
MainProcs &
"}$N$N"