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Fix -fmacro-backtrace-limit=0 to show the entire macro backtrace. 

llvm-svn: 148930
This commit is contained in:
Ted Kremenek 2012-01-25 06:07:15 +00:00
parent 47a86bdbe2
commit a163d0b5de
2 changed files with 55 additions and 1 deletions
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3
clang/lib/Frontend/DiagnosticRenderer.cpp
View File

@ -260,7 +260,8 @@ void DiagnosticRenderer::emitMacroExpansionsAndCarets(
Loc = getImmediateMacroCalleeLoc(SM, Loc);
unsigned MacroSkipStart = 0, MacroSkipEnd = 0;
if (MacroDepth > DiagOpts.MacroBacktraceLimit) {
if (MacroDepth > DiagOpts.MacroBacktraceLimit &&
DiagOpts.MacroBacktraceLimit != 0) {
MacroSkipStart = DiagOpts.MacroBacktraceLimit / 2 +
DiagOpts.MacroBacktraceLimit % 2;
MacroSkipEnd = MacroDepth - DiagOpts.MacroBacktraceLimit / 2;

53
clang/test/Misc/diag-macro-backtrace.c Normal file
View File

@ -0,0 +1,53 @@
// RUN: %clang -fsyntax-only -fmacro-backtrace-limit=0 %s 2>&1 | FileCheck %s
#define FOO 1+"hi"
#define BAR FOO
#define BAZ BAR
#define QUZ BAZ
#define TAZ QUZ
#define ABA TAZ
#define BAB ABA
#define ZAZ BAB
#define WAZ ZAZ
#define DROOL WAZ
#define FOOL DROOL
FOOL
// CHECK: :15:1: error: expected identifier or '('
// CHECK: FOOL
// CHECK: ^
// CHECK: :13:14: note: expanded from macro 'FOOL'
// CHECK: #define FOOL DROOL
// CHECK: ^
// CHECK: :12:15: note: expanded from macro 'DROOL'
// CHECK: #define DROOL WAZ
// CHECK: ^
// CHECK: :11:13: note: expanded from macro 'WAZ'
// CHECK: #define WAZ ZAZ
// CHECK: ^
// CHECK: :10:13: note: expanded from macro 'ZAZ'
// CHECK: #define ZAZ BAB
// CHECK: ^
// CHECK: :9:13: note: expanded from macro 'BAB'
// CHECK: #define BAB ABA
// CHECK: ^
// CHECK: :8:13: note: expanded from macro 'ABA'
// CHECK: #define ABA TAZ
// CHECK: ^
// CHECK: :7:13: note: expanded from macro 'TAZ'
// CHECK: #define TAZ QUZ
// CHECK: ^
// CHECK: :6:13: note: expanded from macro 'QUZ'
// CHECK: #define QUZ BAZ
// CHECK: ^
// CHECK: :5:13: note: expanded from macro 'BAZ'
// CHECK: #define BAZ BAR
// CHECK: ^
// CHECK: :4:13: note: expanded from macro 'BAR'
// CHECK: #define BAR FOO
// CHECK: ^
// CHECK: :3:13: note: expanded from macro 'FOO'
// CHECK: #define FOO 1+"hi"
// CHECK: ^
// CHECK: 1 error generated.