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From: Julian S. <se...@so...> - 2020-06-11 07:08:24
|
https://sourceware.org/git/gitweb.cgi?p=valgrind.git;h=71e3870dd3e0556a38cf15f7332ad2219c5d94ee commit 71e3870dd3e0556a38cf15f7332ad2219c5d94ee Author: Julian Seward <js...@ac...> Date: Thu Jun 11 09:07:52 2020 +0200 Update NEWS following the fix of #422715. Diff: --- NEWS | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/NEWS b/NEWS index 9d89f5ec52..e23c449166 100644 --- a/NEWS +++ b/NEWS @@ -42,6 +42,19 @@ where XXXXXX is the bug number as listed below. 345077 linux syscall execveat support (linux 3.19) n-i-bz helgrind: If hg_cli__realloc fails, return NULL. + + +Release 3.16.1 (?? June 2020) +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +3.16.1 is identical to 3.16.0, except that it fixes the following bug that +was discovered late in the 3.16.0 release process: + +422715 valgrind 3.16.0 on 32-bit x86: vex: the `impossible' happened: + expr_is_guardable: unhandled expr + + + Release 3.16.0 (27 May 2020) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
|
From: Julian S. <se...@so...> - 2020-06-11 07:04:24
|
https://sourceware.org/git/gitweb.cgi?p=valgrind.git;h=6aa4f7e7e76b40c183fb29650540d119ce1b4a4a commit 6aa4f7e7e76b40c183fb29650540d119ce1b4a4a Author: Julian Seward <js...@ac...> Date: Thu Jun 11 09:01:52 2020 +0200 expr_is_guardable, stmt_is_guardable, add_guarded_stmt_to_end_of: handle GetI/PutI cases. This fixes #422715. Diff: --- VEX/priv/guest_generic_bb_to_IR.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/VEX/priv/guest_generic_bb_to_IR.c b/VEX/priv/guest_generic_bb_to_IR.c index 2f204c5b0a..0cee970e43 100644 --- a/VEX/priv/guest_generic_bb_to_IR.c +++ b/VEX/priv/guest_generic_bb_to_IR.c @@ -425,6 +425,7 @@ static Bool expr_is_guardable ( const IRExpr* e ) case Iex_ITE: case Iex_CCall: case Iex_Get: + case Iex_GetI: case Iex_Const: case Iex_RdTmp: return True; @@ -450,6 +451,7 @@ static Bool stmt_is_guardable ( const IRStmt* st ) case Ist_NoOp: case Ist_IMark: case Ist_Put: + case Ist_PutI: return True; // These are definitely not guardable, or at least it's way too much // hassle to do so. @@ -506,7 +508,7 @@ static void add_guarded_stmt_to_end_of ( /*MOD*/IRSB* bb, // Put(offs, e) ==> Put(offs, ITE(guard, e, Get(offs, sizeof(e)))) // Which when flattened out is: // t1 = Get(offs, sizeof(e)) - // t2 = ITE(guard, e, t2) + // t2 = ITE(guard, e, t1) // Put(offs, t2) Int offset = st->Ist.Put.offset; IRExpr* e = st->Ist.Put.data; @@ -519,6 +521,26 @@ static void add_guarded_stmt_to_end_of ( /*MOD*/IRSB* bb, addStmtToIRSB(bb, IRStmt_Put(offset, IRExpr_RdTmp(t2))); break; } + case Ist_PutI: { + // PutI(descr,ix,bias, e) ==> Put(descr,ix,bias, ITE(guard, e, GetI(descr,ix,bias))) + // Which when flattened out is: + // t1 = GetI(descr,ix,bias) + // t2 = ITE(guard, e, t1) + // PutI(descr,ix,bias, t2) + IRPutI* details = st->Ist.PutI.details; + IRRegArray* descr = details->descr; + IRExpr* ix = details->ix; + Int bias = details->bias; + IRExpr* e = details->data; + IRType ty = typeOfIRExpr(bb->tyenv, e); + IRTemp t1 = newIRTemp(bb->tyenv, ty); + IRTemp t2 = newIRTemp(bb->tyenv, ty); + addStmtToIRSB(bb, IRStmt_WrTmp(t1, IRExpr_GetI(descr,ix,bias))); + addStmtToIRSB(bb, IRStmt_WrTmp(t2, IRExpr_ITE(IRExpr_RdTmp(guard), + e, IRExpr_RdTmp(t1)))); + addStmtToIRSB(bb, IRStmt_PutI(mkIRPutI(descr,ix,bias, IRExpr_RdTmp(t2)))); + break; + } case Ist_Exit: { // Exit(xguard, dst, jk, offsIP) // ==> t1 = And1(xguard, guard) |