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NimMain/NimPreMain calls are now only volatile when it makes sense. (#20882)

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This commit is contained in:
Yuriy Glukhov
2022-11-22 15:55:31 +01:00
committed by GitHub
parent 27d9c67352
commit fc37554795
1 changed files with 31 additions and 49 deletions
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80
compiler/cgen.nim
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@@ -211,6 +211,10 @@ macro ropecg(m: BModule, frmt: static[FormatStr], args: untyped): Rope =
let ident = args[j-1]
flushStrLit()
result.add newCall(formatValue, resVar, newCall(ident"cgsymValue", m, ident))
elif frmt[i] == '#' and frmt[i+1] == '#':
inc(i, 2)
strLit.add("#")
var start = i
while i < frmt.len:
if frmt[i] != '$' and frmt[i] != '#': inc(i)
@@ -1413,24 +1417,21 @@ proc genMainProc(m: BModule) =
# prevents inlining of the NimMainInner function and dependent
# functions, which might otherwise merge their stack frames.
PreMainVolatileBody =
"\tvoid (*volatile inner)(void);$N" &
"\tinner = $3PreMainInner;$N" &
"$1" &
"\t(*inner)();$N"
PreMainNonVolatileBody =
"$1" &
"\t$3PreMainInner();$N"
PreMainBodyStart = "$N" &
PreMainBody = "$N" &
"N_LIB_PRIVATE void $3PreMainInner(void) {$N" &
"$2" &
"}$N$N" &
"$4" &
"N_LIB_PRIVATE void $3PreMain(void) {$N"
PreMainBodyEnd =
"N_LIB_PRIVATE void $3PreMain(void) {$N" &
"\t##if $5$N" & # 1 for volatile call, 0 for non-volatile
"\tvoid (*volatile inner)(void);$N" &
"\tinner = $3PreMainInner;$N" &
"$1" &
"\t(*inner)();$N" &
"\t##else$N" &
"$1" &
"\t$3PreMainInner();$N" &
"\t##endif$N" &
"}$N$N"
MainProcs =
@@ -1443,32 +1444,23 @@ proc genMainProc(m: BModule) =
"$1" &
"}$N$N"
NimMainVolatileBody =
NimMainProc =
"N_CDECL(void, $5NimMain)(void) {$N" &
"\t##if $6$N" & # 1 for volatile call, 0 for non-volatile
"\tvoid (*volatile inner)(void);$N" &
"$4" &
"\tinner = $5NimMainInner;$N" &
"$2" &
"\t(*inner)();$N"
NimMainNonVolatileBody =
"\t(*inner)();$N" &
"\t##else$N" &
"$4" &
"$2" &
"\t$5NimMainInner();$N"
NimMainProcStart =
"N_CDECL(void, $5NimMain)(void) {$N"
NimMainProcEnd =
"\t$5NimMainInner();$N" &
"\t##endif$N" &
"}$N$N"
NimMainProc = NimMainProcStart & NimMainVolatileBody & NimMainProcEnd
NimSlimMainProc = NimMainProcStart & NimMainNonVolatileBody & NimMainProcEnd
NimMainBody = NimMainInner & NimMainProc
NimSlimMainBody = NimMainInner & NimSlimMainProc
PosixCMain =
"int main(int argc, char** args, char** env) {$N" &
"\tcmdLine = args;$N" &
@@ -1532,42 +1524,32 @@ proc genMainProc(m: BModule) =
if m.config.target.targetOS == osStandalone or m.config.selectedGC in {gcNone, gcArc, gcOrc}: "".rope
else: ropecg(m, "\t#initStackBottomWith((void *)&inner);$N", [])
inc(m.labels)
if m.config.selectedGC notin {gcNone, gcArc, gcOrc}:
appcg(m, m.s[cfsProcs], PreMainBodyStart & PreMainVolatileBody & PreMainBodyEnd, [m.g.mainDatInit, m.g.otherModsInit, m.config.nimMainPrefix, posixCmdLine])
else:
appcg(m, m.s[cfsProcs], PreMainBodyStart & PreMainNonVolatileBody & PreMainBodyEnd, [m.g.mainDatInit, m.g.otherModsInit, m.config.nimMainPrefix, posixCmdLine])
let isVolatile = if m.config.selectedGC notin {gcNone, gcArc, gcOrc}: "1" else: "0"
appcg(m, m.s[cfsProcs], PreMainBody, [m.g.mainDatInit, m.g.otherModsInit, m.config.nimMainPrefix, posixCmdLine, isVolatile])
if m.config.target.targetOS == osWindows and
m.config.globalOptions * {optGenGuiApp, optGenDynLib} != {}:
if optGenGuiApp in m.config.globalOptions:
const nimMain = WinNimMain
appcg(m, m.s[cfsProcs], nimMain,
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix])
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix, isVolatile])
else:
const nimMain = WinNimDllMain
appcg(m, m.s[cfsProcs], nimMain,
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix])
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix, isVolatile])
elif m.config.target.targetOS == osGenode:
const nimMain = GenodeNimMain
appcg(m, m.s[cfsProcs], nimMain,
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix])
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix, isVolatile])
elif optGenDynLib in m.config.globalOptions:
const nimMain = PosixNimDllMain
appcg(m, m.s[cfsProcs], nimMain,
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix])
elif m.config.target.targetOS == osStandalone:
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix, isVolatile])
else:
const nimMain = NimMainBody
appcg(m, m.s[cfsProcs], nimMain,
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix])
else:
if m.config.selectedGC notin {gcNone, gcArc, gcOrc}:
const nimMain = NimMainBody
appcg(m, m.s[cfsProcs], nimMain,
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix])
else:
const nimMain = NimSlimMainBody
appcg(m, m.s[cfsProcs], nimMain,
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix])
[m.g.mainModInit, initStackBottomCall, m.labels, preMainCode, m.config.nimMainPrefix, isVolatile])
if optNoMain notin m.config.globalOptions:
if m.config.cppCustomNamespace.len > 0: