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Export js_ReconstructStackDepth for use by side-exit code when synthesizing stack frames.

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This commit is contained in:
Brendan Eich
2008-07-28 23:46:27 -07:00
parent 3e5963327b
commit d887639d7d
2 changed files with 26 additions and 7 deletions
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26
js/src/jsopcode.cpp
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@@ -5136,6 +5136,12 @@ DecompileExpression(JSContext *cx, JSScript *script, JSFunction *fun,
return name;
}
uintN
js_ReconstructStackDepth(JSContext *cx, JSScript *script, jsbytecode *pc)
{
return ReconstructPCStack(cx, script, pc, NULL);
}
static intN
ReconstructPCStack(JSContext *cx, JSScript *script, jsbytecode *pc,
jsbytecode **pcstack)
@@ -5258,8 +5264,10 @@ ReconstructPCStack(JSContext *cx, JSScript *script, jsbytecode *pc,
*/
switch (op) {
default:
for (i = 0; i != ndefs; ++i)
pcstack[pcdepth + i] = pc;
if (pcstack) {
for (i = 0; i != ndefs; ++i)
pcstack[pcdepth + i] = pc;
}
break;
case JSOP_CASE:
@@ -5270,13 +5278,16 @@ ReconstructPCStack(JSContext *cx, JSScript *script, jsbytecode *pc,
case JSOP_DUP:
JS_ASSERT(ndefs == 2);
pcstack[pcdepth + 1] = pcstack[pcdepth];
if (pcstack)
pcstack[pcdepth + 1] = pcstack[pcdepth];
break;
case JSOP_DUP2:
JS_ASSERT(ndefs == 4);
pcstack[pcdepth + 2] = pcstack[pcdepth];
pcstack[pcdepth + 3] = pcstack[pcdepth + 1];
if (pcstack) {
pcstack[pcdepth + 2] = pcstack[pcdepth];
pcstack[pcdepth + 3] = pcstack[pcdepth + 1];
}
break;
case JSOP_LEAVEBLOCKEXPR:
@@ -5289,12 +5300,13 @@ ReconstructPCStack(JSContext *cx, JSScript *script, jsbytecode *pc,
*/
JS_ASSERT(ndefs == 0);
LOCAL_ASSERT(pcdepth >= 1);
LOCAL_ASSERT(nuses == 0 ||
LOCAL_ASSERT(nuses == 0 || !pcstack ||
*pcstack[pcdepth - 1] == JSOP_ENTERBLOCK ||
(*pcstack[pcdepth - 1] == JSOP_TRAP &&
JS_GetTrapOpcode(cx, script, pcstack[pcdepth - 1])
== JSOP_ENTERBLOCK));
pcstack[pcdepth - 1] = pc;
if (pcstack)
pcstack[pcdepth - 1] = pc;
break;
}
pcdepth += ndefs;