Add an option that allows one to "decode" the LSDA.
The LSDA is a bit difficult for the non-initiated to read. Even with comments,
it's not always clear what's going on. This wraps the ASM streamer in a class
that retains the LSDA and then emits a human-readable description of what's
going on in it.
So instead of having to make sense of:
Lexception1:
.byte 255
.byte 155
.byte 168
.space 1
.byte 3
.byte 26
Lset0 = Ltmp7-Leh_func_begin1
.long Lset0
Lset1 = Ltmp812-Ltmp7
.long Lset1
Lset2 = Ltmp913-Leh_func_begin1
.long Lset2
.byte 3
Lset3 = Ltmp812-Leh_func_begin1
.long Lset3
Lset4 = Leh_func_end1-Ltmp812
.long Lset4
.long 0
.byte 0
.byte 1
.byte 0
.byte 2
.byte 125
.long __ZTIi@GOTPCREL+4
.long __ZTIPKc@GOTPCREL+4
you can read this instead:
## Exception Handling Table: Lexception1
## @LPStart Encoding: omit
## @TType Encoding: indirect pcrel sdata4
## @TType Base: 40 bytes
## @CallSite Encoding: udata4
## @Action Table Size: 26 bytes
## Action 1:
## A throw between Ltmp7 and Ltmp812 jumps to Ltmp913 on an exception.
## For type(s): __ZTIi@GOTPCREL+4 __ZTIPKc@GOTPCREL+4
## Action 2:
## A throw between Ltmp812 and Leh_func_end1 does not have a landing pad.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133286 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-mc/llvm-mc.cpp b/tools/llvm-mc/llvm-mc.cpp
index eb23a1a..48e2a61 100644
--- a/tools/llvm-mc/llvm-mc.cpp
+++ b/tools/llvm-mc/llvm-mc.cpp
@@ -61,6 +61,10 @@
ShowInstOperands("show-inst-operands",
cl::desc("Show instructions operands as parsed"));
+static cl::opt<bool>
+DecodeLSDA("decode-lsda",
+ cl::desc("Print LSDA in human readable format"));
+
static cl::opt<unsigned>
OutputAsmVariant("output-asm-variant",
cl::desc("Syntax variant to use for output printing"));
@@ -97,7 +101,7 @@
static cl::opt<std::string>
ArchName("arch", cl::desc("Target arch to assemble for, "
- "see -version for available targets"));
+ "see -version for available targets"));
static cl::opt<std::string>
TripleName("triple", cl::desc("Target triple to assemble for, "
@@ -110,12 +114,11 @@
cl::init(""));
static cl::opt<bool>
-NoInitialTextSection("n", cl::desc(
- "Don't assume assembly file starts in the text section"));
+NoInitialTextSection("n", cl::desc("Don't assume assembly file starts "
+ "in the text section"));
static cl::opt<bool>
-SaveTempLabels("L", cl::desc(
- "Don't discard temporary labels"));
+SaveTempLabels("L", cl::desc("Don't discard temporary labels"));
enum ActionType {
AC_AsLex,
@@ -358,7 +361,8 @@
Str.reset(TheTarget->createAsmStreamer(Ctx, FOS, /*asmverbose*/true,
/*useLoc*/ true,
/*useCFI*/ true, IP, CE, TAB,
- ShowInst));
+ ShowInst,
+ DecodeLSDA));
} else if (FileType == OFT_Null) {
Str.reset(createNullStreamer(Ctx));
} else {