[Lldb-commits] [lldb] r156584 - in /lldb/trunk/examples/darwin/heap_find: heap.py heap/heap_find.cpp
Greg Clayton
gclayton at apple.com
Thu May 10 16:17:28 PDT 2012
Author: gclayton
Date: Thu May 10 18:17:28 2012
New Revision: 156584
URL: http://llvm.org/viewvc/llvm-project?rev=156584&view=rev
Log:
Added the ability to get the stack history for a malloc block. This is a work in progress. Checking this in so I can work on it some more.
Modified:
lldb/trunk/examples/darwin/heap_find/heap.py
lldb/trunk/examples/darwin/heap_find/heap/heap_find.cpp
Modified: lldb/trunk/examples/darwin/heap_find/heap.py
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/examples/darwin/heap_find/heap.py?rev=156584&r1=156583&r2=156584&view=diff
==============================================================================
--- lldb/trunk/examples/darwin/heap_find/heap.py (original)
+++ lldb/trunk/examples/darwin/heap_find/heap.py Thu May 10 18:17:28 2012
@@ -79,7 +79,48 @@
parser.add_option('-m', '--memory', action='store_true', dest='memory', help='dump the memory for each matching block', default=False)
parser.add_option('-f', '--format', type='string', dest='format', help='the format to use when dumping memory if --memory is specified', default=None)
parser.add_option('-s', '--stack', action='store_true', dest='stack', help='gets the stack that allocated each malloc block if MallocStackLogging is enabled', default=False)
- #parser.add_option('-S', '--stack-history', action='store_true', dest='stack_history', help='gets the stack history for all allocations whose start address matches each malloc block if MallocStackLogging is enabled', default=False)
+ parser.add_option('-S', '--stack-history', action='store_true', dest='stack_history', help='gets the stack history for all allocations whose start address matches each malloc block if MallocStackLogging is enabled', default=False)
+
+type_flag_strings = [ 'free', 'generic', 'alloc', 'dealloc' ];
+
+def dump_stack_history_entry(stack_history_entry, idx):
+ if stack_history_entry.addr != 0:
+ symbolicator = lldb.utils.symbolication.Symbolicator()
+ symbolicator.target = lldb.target
+ global type_flag_strings
+ print 'stack_history_entry[%u]: addr = 0x%x, type=%s, arg=%u, frames=' % (idx, stack_history_entry.address, type_flag_strings[stack_history_entry.type_flags], stack_history_entry.argument)
+ frame_idx = 0
+ pc = int(stack_history_entry.frames[frame_idx])
+ while pc != 0:
+ if pc >= 0x1000:
+ frames = symbolicator.symbolicate(pc)
+ if frames:
+ for frame in frames:
+ print '[%3u] %s' % (frame_idx, frame)
+ frame_idx += 1
+ else:
+ print '[%3u] 0x%x' % (frame_idx, pc)
+ frame_idx += 1
+ frame_idx = frame_idx + 1
+ pc = int(stack_history_entry.frames[frame_idx])
+ else:
+ pc = 0
+
+def dump_stack_history_entries(addr):
+ # malloc_stack_entry *get_stack_history_for_address (const void * addr)
+
+ expr = 'get_stack_history_for_address((void *)%s)' % addr
+ expr_sbvalue = lldb.frame.EvaluateExpression (expr)
+ if expr_sbvalue.error.Success():
+ if expr_sbvalue.unsigned:
+ expr_value = lldb.value(expr_sbvalue)
+ idx = 0;
+ stack_history_entry = expr_value[idx]
+ while stack_history_entry.address:
+ dump_stack_history_entry(stack_history_entry, idx)
+ idx = idx + 1
+ stack_history_entry = expr_value[idx]
+
def heap_search(options, arg_str):
dylid_load_err = load_dylib()
@@ -186,7 +227,9 @@
memory_command = "memory read -f %s 0x%x 0x%x" % (memory_format, malloc_addr, malloc_addr + malloc_size)
lldb.debugger.GetCommandInterpreter().HandleCommand(memory_command, cmd_result)
print cmd_result.GetOutput()
- if options.stack:
+ if options.stack_history:
+ dump_stack_history_entries(malloc_addr)
+ elif options.stack:
symbolicator = lldb.utils.symbolication.Symbolicator()
symbolicator.target = lldb.target
expr_str = "g_stack_frames_count = sizeof(g_stack_frames)/sizeof(uint64_t); (int)__mach_stack_logging_get_frames((unsigned)mach_task_self(), 0x%xull, g_stack_frames, g_stack_frames_count, &g_stack_frames_count)" % (malloc_addr)
Modified: lldb/trunk/examples/darwin/heap_find/heap/heap_find.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/examples/darwin/heap_find/heap/heap_find.cpp?rev=156584&r1=156583&r2=156584&view=diff
==============================================================================
--- lldb/trunk/examples/darwin/heap_find/heap/heap_find.cpp (original)
+++ lldb/trunk/examples/darwin/heap_find/heap/heap_find.cpp Thu May 10 18:17:28 2012
@@ -68,7 +68,9 @@
#include <ctype.h>
#include <mach/mach.h>
#include <malloc/malloc.h>
+extern "C" {
#include <stack_logging.h>
+}
#include <stdio.h>
#include <stdlib.h>
#include <vector>
@@ -117,8 +119,18 @@
intptr_t offset;
};
+struct malloc_stack_entry
+{
+ void *address;
+ uint64_t argument;
+ uint32_t type_flags;
+ std::vector<mach_vm_address_t> frames;
+};
+
+
std::vector<malloc_match> g_matches;
const void *g_lookup_addr = 0;
+std::vector<malloc_stack_entry> g_malloc_stack_history;
mach_vm_address_t g_stack_frames[MAX_FRAMES];
uint32_t g_stack_frames_count = 0;
@@ -242,6 +254,50 @@
}
}
+static void
+get_stack_for_address_enumerator(mach_stack_logging_record_t stack_record, void *task_ptr)
+{
+ uint32_t num_frames = 0;
+ kern_return_t err = __mach_stack_logging_frames_for_uniqued_stack (*(task_t *)task_ptr,
+ stack_record.stack_identifier,
+ g_stack_frames,
+ MAX_FRAMES,
+ &num_frames);
+ g_malloc_stack_history.resize(g_malloc_stack_history.size() + 1);
+ g_malloc_stack_history.back().addr = (void *)stack_record.address;
+ g_malloc_stack_history.back().type_flags = stack_record.type_flags;
+ g_malloc_stack_history.back().argument = stack_record.argument;
+ if (num_frames > 0)
+ g_malloc_stack_history.back().frames.assign(g_stack_frames, g_stack_frames + num_frames);
+ g_malloc_stack_history.back().frames.push_back(0); // Terminate the frames with zero
+}
+
+malloc_stack_entry *
+get_stack_history_for_address (const void * addr)
+{
+ // typedef struct {
+ // uint32_t type_flags;
+ // uint64_t stack_identifier;
+ // uint64_t argument;
+ // mach_vm_address_t address;
+ // } mach_stack_logging_record_t;
+ std::vector<malloc_stack_entry> empty;
+ g_malloc_stack_history.swap(empty);
+ task_t task = mach_task_self();
+ kern_return_t err = __mach_stack_logging_enumerate_records (task,
+ (mach_vm_address_t)addr,
+ get_stack_for_address_enumerator,
+ &task);
+ // Append an empty entry
+ if (g_malloc_stack_history.empty())
+ return NULL;
+ g_malloc_stack_history.resize(g_malloc_stack_history.size() + 1);
+ g_malloc_stack_history.back().addr = 0;
+ g_malloc_stack_history.back().type_flags = 0;
+ g_malloc_stack_history.back().argument = 0;
+ return g_malloc_stack_history.data();
+}
+
//----------------------------------------------------------------------
// find_pointer_in_heap
//
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