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Support for stack traces in tracing entries:

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* Added capture_tracing_stack_trace() which allocates space in the
  tracing buffer and captures the stack trace according to the given
  parameters.
* Added TraceOutput::PrintStackTrace() to print a stack trace thus
  created.
* Added TraceEntry::DumpStackTrace() callback which is supposed to print
  a stack trace for the entry, if it can do that.
* Added "--stacktrace" switch to the "traced" command, which causes the
  stack traces for all entries that have one to be printed as well.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25205 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold
2008-04-27 03:02:01 +00:00
parent 4dd0a2c7b6
commit 65f4015279
2 changed files with 99 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/system/kernel/debug/tracing.cpp
+93 -10
View File
@@ -10,7 +10,10 @@
#include <stdarg.h>
#include <stdlib.h>
#include <arch/debug.h>
#include <debug.h>
#include <elf.h>
#include <int.h>
#include <kernel.h>
#include <team.h>
#include <thread.h>
@@ -34,6 +37,13 @@ enum {
FILTER_MATCH = 0x08
};
struct tracing_stack_trace {
int32 depth;
addr_t return_addresses[0];
};
static const size_t kTraceOutputBufferSize = 10240;
static const size_t kBufferSize = MAX_TRACE_SIZE / 4;
static trace_entry* sBuffer;
@@ -42,6 +52,7 @@ static trace_entry* sAfterLastEntry;
static uint32 sEntries;
static uint32 sWritten;
static spinlock sLock;
static char* sTraceOutputBuffer;
static trace_entry*
@@ -238,6 +249,31 @@ TraceOutput::Print(const char* format,...)
}
void
TraceOutput::PrintStackTrace(tracing_stack_trace* stackTrace)
{
if (stackTrace == NULL || stackTrace->depth <= 0)
return;
for (int32 i = 0; i < stackTrace->depth; i++) {
addr_t address = stackTrace->return_addresses[i];
const char* symbol;
const char* imageName;
bool exactMatch;
addr_t baseAddress;
if (elf_debug_lookup_symbol_address(address, &baseAddress, &symbol,
&imageName, &exactMatch) == B_OK) {
Print(" %p %s + 0x%lx (%s)%s\n", (void*)address, symbol,
address - baseAddress, imageName,
exactMatch ? "" : " (nearest)");
} else
Print(" %p\n", (void*)address);
}
}
void
TraceOutput::SetLastEntryTime(bigtime_t time)
{
@@ -275,6 +311,12 @@ TraceEntry::Dump(TraceOutput& out)
}
void
TraceEntry::DumpStackTrace(TraceOutput& out)
{
}
void
TraceEntry::Initialized()
{
@@ -758,6 +800,7 @@ dump_tracing_internal(int argc, char** argv, WrapperTraceFilter* wrapperFilter)
// variables in which we store our state to be continuable
static int32 _previousCount = 0;
static bool _previousHasFilter = false;
static bool _previousPrintStackTrace = false;
static int32 _previousMaxToCheck = 0;
static int32 _previousFirstChecked = 1;
static int32 _previousLastChecked = -1;
@@ -775,14 +818,18 @@ dump_tracing_internal(int argc, char** argv, WrapperTraceFilter* wrapperFilter)
int32 cont = 0;
bool hasFilter = false;
bool printStackTrace = false;
uint32 outputFlags = 0;
while (argi < argc) {
if (strcmp(argv[argi], "--printteam") == 0) {
if (strcmp(argv[argi], "--difftime") == 0) {
outputFlags |= TRACE_OUTPUT_DIFF_TIME;
argi++;
} else if (strcmp(argv[argi], "--printteam") == 0) {
outputFlags |= TRACE_OUTPUT_TEAM_ID;
argi++;
} else if (strcmp(argv[argi], "--difftime") == 0) {
outputFlags |= TRACE_OUTPUT_DIFF_TIME;
} else if (strcmp(argv[argi], "--stacktrace") == 0) {
printStackTrace = true;
argi++;
} else
break;
@@ -850,6 +897,7 @@ dump_tracing_internal(int argc, char** argv, WrapperTraceFilter* wrapperFilter)
maxToCheck = _previousMaxToCheck;
hasFilter = _previousHasFilter;
outputFlags = _previousOutputFlags;
printStackTrace = _previousPrintStackTrace;
if (direction < 0)
start = _previousFirstChecked - 1;
@@ -896,8 +944,8 @@ dump_tracing_internal(int argc, char** argv, WrapperTraceFilter* wrapperFilter)
iterator.Reset();
}
char buffer[256];
LazyTraceOutput out(buffer, sizeof(buffer), outputFlags);
LazyTraceOutput out(sTraceOutputBuffer, kTraceOutputBufferSize,
outputFlags);
bool markedMatching = false;
int32 firstToDump = firstToCheck;
@@ -985,6 +1033,13 @@ dump_tracing_internal(int argc, char** argv, WrapperTraceFilter* wrapperFilter)
len--;
kprintf("%5ld. %.*s\n", index, len, dump);
if (printStackTrace) {
out.Clear();
entry->DumpStackTrace(out);
if (out.Size() > 0)
kputs(out.Buffer());
}
} else if (!filter)
kprintf("%5ld. ** uninitialized entry **\n", index);
@@ -999,6 +1054,7 @@ dump_tracing_internal(int argc, char** argv, WrapperTraceFilter* wrapperFilter)
_previousCount = count;
_previousMaxToCheck = maxToCheck;
_previousHasFilter = hasFilter;
_previousPrintStackTrace = printStackTrace;
_previousFirstChecked = firstToCheck;
_previousLastChecked = lastToCheck;
_previousDirection = direction;
@@ -1089,6 +1145,31 @@ alloc_tracing_buffer_strcpy(const char* source, size_t maxSize, bool user)
}
tracing_stack_trace*
capture_tracing_stack_trace(int32 maxCount, int32 skipFrames, bool userOnly)
{
#if ENABLE_TRACING
// TODO: page_fault_exception() doesn't allow us to gracefully handle
// a bad address in the stack trace, if interrupts are disabled.
if (!are_interrupts_enabled())
return NULL;
tracing_stack_trace* stackTrace
= (tracing_stack_trace*)alloc_tracing_buffer(
sizeof(tracing_stack_trace) + maxCount * sizeof(addr_t));
if (stackTrace != NULL) {
stackTrace->depth = arch_debug_get_stack_trace(
stackTrace->return_addresses, maxCount, skipFrames + 1, userOnly);
}
return stackTrace;
#else
return NULL;
#endif
}
int
dump_tracing(int argc, char** argv, WrapperTraceFilter* wrapperFilter)
{
@@ -1104,12 +1185,13 @@ extern "C" status_t
tracing_init(void)
{
#if ENABLE_TRACING
area_id area = create_area("tracing log", (void**)&sBuffer,
B_ANY_KERNEL_ADDRESS, MAX_TRACE_SIZE, B_FULL_LOCK,
B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA);
area_id area = create_area("tracing log", (void**)&sTraceOutputBuffer,
B_ANY_KERNEL_ADDRESS, MAX_TRACE_SIZE + kTraceOutputBufferSize,
B_FULL_LOCK, B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA);
if (area < B_OK)
return area;
sBuffer = (trace_entry*)(sTraceOutputBuffer + kTraceOutputBufferSize);
sFirstEntry = sBuffer;
sAfterLastEntry = sBuffer;
@@ -1125,8 +1207,9 @@ tracing_init(void)
"afterwards entering an empty line in the debugger will reinvoke it.\n"
"If no arguments are given, the command continues in the direction\n"
"of the last invocation.\n"
"\"--printteam\" enables printing the entries' team IDs.\n"
"\"--difftime\" print difference times for all but the first entry.\n"
"\"--printteam\" enables printing the entries' team IDs.\n"
"\"--difftime\" print difference times for all but the first entry.\n"
"\"--stacktrace\" print stack traces for entries that captured one.\n"
" <start> - The base index of the entries to print. Depending on\n"
" whether the iteration direction is forward or\n"
" backward this will be the first or last entry printed\n"