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Add bounds checking to SoundMacro execution loop

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This commit is contained in:
Jack Andersen
2016-12-07 18:54:45 -10:00
parent c886bfd7d2
commit eb948dfd63
4 changed files with 51 additions and 19 deletions
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39
lib/SoundMacroState.cpp
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@@ -13,6 +13,19 @@
namespace amuse
{
int SoundMacroState::_assertPC(int pc, uint32_t size)
{
if (pc == -1)
return -1;
int cmdCount = (size - sizeof(Header)) / sizeof(Command);
if (pc >= cmdCount)
{
fprintf(stderr, "SoundMacro PC bounds exceeded [%d/%d]\n", pc, cmdCount);
abort();
}
return pc;
}
void SoundMacroState::Header::swapBig()
{
m_size = SBig(m_size);
@@ -133,7 +146,8 @@ void SoundMacroState::initialize(const unsigned char* ptr, int step, double tick
m_curMod = midiMod;
m_curPitch = midiKey * 100;
m_pc.clear();
m_pc.push_back({ptr, step});
const Header& header = reinterpret_cast<const Header&>(ptr);
m_pc.push_back({ptr, _assertPC(step, header.m_size, swapData)});
m_inWait = false;
m_execTime = 0.f;
m_keyoff = false;
@@ -143,7 +157,7 @@ void SoundMacroState::initialize(const unsigned char* ptr, int step, double tick
m_useAdsrControllers = false;
m_portamentoMode = 2;
m_portamentoTime = 0.5f;
m_header = *reinterpret_cast<const Header*>(ptr);
m_header = header;
if (swapData)
m_header.swapBig();
}
@@ -180,6 +194,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
/* Load next command based on counter */
const Command* commands = reinterpret_cast<const Command*>(m_pc.back().first + sizeof(Header));
_assertPC(m_pc.back().second, m_header.m_size);
Command cmd = commands[m_pc.back().second++];
if (vox.getAudioGroup().getDataFormat() != DataFormat::PC)
cmd.swapBig();
@@ -189,7 +204,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
{
case Op::End:
case Op::Stop:
m_pc.back().second = -1;
_setPC(-1);
return true;
case Op::SplitKey:
{
@@ -201,7 +216,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
{
/* Do Branch */
if (macroId == m_header.m_macroId)
m_pc.back().second = macroStep;
_setPC(macroStep);
else
vox.loadSoundObject(macroId, macroStep, m_ticksPerSec, m_initKey, m_initVel, m_initMod);
}
@@ -218,7 +233,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
{
/* Do Branch */
if (macroId == m_header.m_macroId)
m_pc.back().second = macroStep;
_setPC(macroStep);
else
vox.loadSoundObject(macroId, macroStep, m_ticksPerSec, m_initKey, m_initVel, m_initMod);
}
@@ -287,7 +302,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
{
/* Loop back to step */
--m_loopCountdown;
m_pc.back().second = step;
_setPC(step);
}
else /* Break out of loop */
m_loopCountdown = -1;
@@ -301,7 +316,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
/* Do Branch */
if (macroId == m_header.m_macroId)
m_pc.back().second = macroStep;
_setPC(macroStep);
else
vox.loadSoundObject(macroId, macroStep, m_ticksPerSec, m_initKey, m_initVel, m_initMod);
@@ -389,7 +404,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
{
/* Do Branch */
if (macroId == m_header.m_macroId)
m_pc.back().second = macroStep;
_setPC(macroStep);
else
vox.loadSoundObject(macroId, macroStep, m_ticksPerSec, m_initKey, m_initVel, m_initMod);
}
@@ -511,7 +526,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
{
/* Do branch */
if (macroId == m_header.m_macroId)
m_pc.back().second = macroStep;
_setPC(macroStep);
else
vox.loadSoundObject(macroId, macroStep, m_ticksPerSec, m_initKey, m_initVel, m_initMod);
}
@@ -776,7 +791,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
int16_t macroStep = *reinterpret_cast<int16_t*>(&cmd.m_data[3]);
if (macroId == m_header.m_macroId)
m_pc.push_back({m_pc.back().first, macroStep});
m_pc.push_back({m_pc.back().first, _assertPC(macroStep, m_header.m_size)});
else
vox.loadSoundObject(macroId, macroStep, m_ticksPerSec, m_initKey, m_initVel, m_initMod, true);
@@ -1205,7 +1220,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
b = m_variables[b];
if ((a == b) ^ lnot)
m_pc.back().second = macroStep;
_setPC(macroStep);
break;
}
@@ -1229,7 +1244,7 @@ bool SoundMacroState::advance(Voice& vox, double dt)
b = m_variables[b];
if ((a < b) ^ lnot)
m_pc.back().second = macroStep;
_setPC(macroStep);
break;
}