ARCHIVE/xahaud
3
0
Fork 0
mirror of https://github.com/Xahau/xahaud.git synced 2025-11-29 06:55:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

fix overly zealous guard check

Browse Source
This commit is contained in:
Richard Holland
2022-04-28 15:16:45 +00:00
parent 4b3be856ea
commit b189908c10
1 changed files with 7 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/ripple/app/tx/impl/SetHook.cpp
View File

@@ -243,18 +243,17 @@ check_guard(
// branch loop block instructions
if ((instr >= 0x02 && instr <= 0x0F) || instr == 0x11)
{
if (mode == 0)
if (mode == 0 && instr >= 0x03)
{
JLOG(ctx.j.trace()) << "HookSet(" << hook::log::GUARD_MISSING << ")"
<< "[" << HS_ACC() << "]: GuardCheck "
<< "_g() did not occur at start of function or loop statement "
<< "_g() did not occur at start of loop statement "
<< "codesec: " << codesec << " hook byte offset: " << i;
return {};
}
// execution to here means we are in 'search mode' for loop instructions
// block instruction
// RH NOTE: block instructions *are* allowed between a loop and a guard
if (instr == 0x02)
{
if (DEBUG_GUARD_CHECK)
@@ -265,6 +264,8 @@ check_guard(
instruction_count[block_depth] = {1, 0};
continue;
}
// execution to here means we are in 'search mode' for loop instructions
// loop instruction
if (instr == 0x03)
@@ -792,10 +793,8 @@ validateCreateCode(SetHookCtx& ctx, STObject const& hookSetObj)
last_import_number = func_upto - 1;
// we have an imported guard function, so now we need to enforce the guard rules
// which are:
// 1. all functions must start with a guard call before any branching [ RH TODO ]
// 2. all loops must start with a guard call before any branching
// we have an imported guard function, so now we need to enforce the guard rule:
// all loops must start with a guard call before any branching
// to enforce these rules we must do a second pass of the wasm in case the function
// section was placed in this wasm binary before the import section