FastAlloc: track allocation tick in debug mode,
minor enhancements to debug output
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commit
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2 changed files with 55 additions and 10 deletions
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@ -75,12 +75,13 @@ FastAlloc::moreStructs(int bucket)
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#if FAST_ALLOC_DEBUG
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#include <iomanip>
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#include <iostream>
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#include <map>
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#include <string>
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#include <typeinfo>
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#include "base/cprintf.hh"
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#include "sim/core.hh" // for curTick
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using namespace std;
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// count of in-use FastAlloc objects
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@ -103,6 +104,7 @@ FastAlloc::FastAlloc()
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{
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// mark this object in use
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inUse = true;
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whenAllocated = curTick;
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// update count
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++numInUse;
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@ -131,6 +133,13 @@ FastAlloc::~FastAlloc()
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inUseNext->inUsePrev = inUsePrev;
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}
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// Note that in all the display functions below we suppress anything
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// with a zero allocation timestamp... there are a bunch of static or
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// quasi-static structures that get allocated during initialization
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// and we generally don't care about them so this gets them out of the
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// way.
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// summarize in-use list
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void
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FastAlloc::dump_summary()
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@ -139,17 +148,19 @@ FastAlloc::dump_summary()
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for (FastAlloc *p = inUseHead.inUseNext; p != &inUseHead; p = p->inUseNext)
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{
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if (p->whenAllocated != 0)
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++typemap[typeid(*p).name()];
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}
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map<string, int>::const_iterator mapiter;
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cout << " count type\n"
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<< " ----- ----\n";
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cprintf(" count type\n"
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" ----- ----\n");
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for (mapiter = typemap.begin(); mapiter != typemap.end(); ++mapiter)
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cout << setw(6) << mapiter->second << " " << mapiter->first << endl;
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cprintf("%6d %s\n",mapiter->second, mapiter->first);
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}
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// show oldest n items on in-use list
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void
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FastAlloc::dump_oldest(int n)
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@ -157,17 +168,45 @@ FastAlloc::dump_oldest(int n)
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// sanity check: don't want to crash the debugger if you forget to
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// pass in a parameter
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if (n < 0 || n > numInUse) {
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cout << "FastAlloc::dump_oldest: bad arg " << n
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<< " (" << numInUse << " objects in use" << endl;
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cprintf("FastAlloc::dump_oldest: bad arg %d (%d objects in use)\n",
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n, numInUse);
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return;
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}
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for (FastAlloc *p = inUseHead.inUseNext;
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p != &inUseHead && n > 0;
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p = p->inUseNext, --n)
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cout << p << " " << typeid(*p).name() << endl;
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p = p->inUseNext, --n) {
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if (p->whenAllocated != 0)
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cprintf("%x %15d %s\n", p, p->whenAllocated, typeid(*p).name());
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}
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}
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// show oldest n items on in-use list for specified type
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void
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FastAlloc::dump_oldest_of_type(int n, const char *type_name)
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{
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// sanity check: don't want to crash the debugger if you forget to
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// pass in a parameter
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if (n < 0 || n > numInUse) {
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cprintf("FastAlloc::dump_oldest_of_type: bad arg %d "
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"(%d objects in use)\n",
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n, numInUse);
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return;
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}
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for (FastAlloc *p = inUseHead.inUseNext;
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p != &inUseHead && n > 0;
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p = p->inUseNext) {
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if (p->whenAllocated != 0 &&
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strcmp(typeid(*p).name(), type_name) == 0) {
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cprintf("%x %15d\n", p, p->whenAllocated);
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--n;
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}
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}
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}
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//
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// C interfaces to FastAlloc::dump_summary() and FastAlloc::dump_oldest().
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// gdb seems to have trouble with calling C++ functions directly.
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@ -74,6 +74,10 @@ class FastAlloc
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#else
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#if FAST_ALLOC_DEBUG
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#include "sim/host.hh" // for Tick
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#endif
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class FastAlloc
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{
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public:
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@ -127,6 +131,7 @@ class FastAlloc
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bool inUse; // in-use flag
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FastAlloc *inUsePrev; // ptrs to build list of in-use objects
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FastAlloc *inUseNext;
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Tick whenAllocated;
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// static (global) debugging vars
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static int numInUse; // count in-use objects
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@ -137,6 +142,7 @@ class FastAlloc
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// versions that might be more agreeable to call from gdb)
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static void dump_summary();
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static void dump_oldest(int n);
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static void dump_oldest_of_type(int n, const char *type_name);
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#endif
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};
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