[Lldb-commits] [lldb] r155262 - in /lldb/trunk/examples/darwin/heap_find: heap.py heap_find.cpp
Greg Clayton
gclayton at apple.com
Fri Apr 20 17:11:26 PDT 2012
Author: gclayton
Date: Fri Apr 20 19:11:26 2012
New Revision: 155262
URL: http://llvm.org/viewvc/llvm-project?rev=155262&view=rev
Log:
Added code to automatically load the libheap.dylib when ptr_refs, cstr_refs or malloc_info are called. If MallocStackLogging is enabled, then you can now use --stack to dump the backtrace of the code that allocated each malloc block.
Modified:
lldb/trunk/examples/darwin/heap_find/heap.py
lldb/trunk/examples/darwin/heap_find/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=155262&r1=155261&r2=155262&view=diff
==============================================================================
--- lldb/trunk/examples/darwin/heap_find/heap.py (original)
+++ lldb/trunk/examples/darwin/heap_find/heap.py Fri Apr 20 19:11:26 2012
@@ -20,14 +20,57 @@
import optparse
import os
import shlex
+import symbolication # from lldb/examples/python/symbolication.py
+def load_dylib():
+ if lldb.target:
+ python_module_directory = os.path.dirname(__file__)
+ libheap_dylib_path = python_module_directory + '/libheap.dylib'
+ if not os.path.exists(libheap_dylib_path):
+ make_command = '(cd "%s" ; make)' % python_module_directory
+ print make_command
+ print commands.getoutput(make_command)
+ if os.path.exists(libheap_dylib_path):
+ libheap_dylib_spec = lldb.SBFileSpec(libheap_dylib_path)
+ if lldb.target.FindModule(libheap_dylib_spec):
+ return None # success, 'libheap.dylib' already loaded
+ if lldb.process:
+ state = lldb.process.state
+ if state == lldb.eStateStopped:
+ (libheap_dylib_path)
+ error = lldb.SBError()
+ image_idx = lldb.process.LoadImage(libheap_dylib_spec, error)
+ if error.Success():
+ return None
+ else:
+ if error:
+ return 'error: %s' % error
+ else:
+ return 'error: "process load \'%s\'" failed' % libheap_dylib_spec
+ else:
+ return 'error: process is not stopped'
+ else:
+ return 'error: invalid process'
+ else:
+ return 'error: file does not exist "%s"' % libheap_dylib_path
+ else:
+ return 'error: invalid target'
+
+ debugger.HandleCommand('process load "%s"' % libheap_dylib_path)
+
def add_common_options(parser):
parser.add_option('-v', '--verbose', action='store_true', dest='verbose', help='display verbose debug info', default=False)
parser.add_option('-o', '--po', action='store_true', dest='print_object_description', help='print the object descriptions for any matches', default=False)
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)
def heap_search(options, arg_str):
+ dylid_load_err = load_dylib()
+ if dylid_load_err:
+ print dylid_load_err
+ return
expr = None
arg_str_description = arg_str
default_memory_format = "Y" # 'Y' is "bytes with ASCII" format
@@ -128,6 +171,41 @@
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:
+ symbolicator = 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)
+ #print expr_str
+ expr = lldb.frame.EvaluateExpression (expr_str);
+ expr_error = expr.GetError()
+ if expr_error.Success():
+ err = expr.unsigned
+ if err:
+ print 'error: __mach_stack_logging_get_frames() returned error %i' % (err)
+ else:
+ count_expr = lldb.frame.EvaluateExpression ("g_stack_frames_count")
+ count = count_expr.unsigned
+ #print 'g_stack_frames_count is %u' % (count)
+ if count > 0:
+ frame_idx = 0
+ frames_expr = lldb.value(lldb.frame.EvaluateExpression ("g_stack_frames"))
+ done = False
+ for stack_frame_idx in range(count):
+ if not done:
+ frame_load_addr = int(frames_expr[stack_frame_idx])
+ if frame_load_addr >= 0x1000:
+ frames = symbolicator.symbolicate(frame_load_addr)
+ if frames:
+ for frame in frames:
+ print '[%3u] %s' % (frame_idx, frame)
+ frame_idx += 1
+ else:
+ print '[%3u] 0x%x' % (frame_idx, frame_load_addr)
+ frame_idx += 1
+ else:
+ done = True
+ else:
+ print 'error: %s' % (expr_error)
else:
print '%s %s was not found in any malloc blocks' % (options.type, arg_str)
else:
@@ -209,8 +287,6 @@
def __lldb_init_module (debugger, dict):
# This initializer is being run from LLDB in the embedded command interpreter
# Add any commands contained in this module to LLDB
- libheap_dylib_path = os.path.dirname(__file__) + '/libheap.dylib'
- debugger.HandleCommand('process load "%s"' % libheap_dylib_path)
debugger.HandleCommand('command script add -f heap.ptr_refs ptr_refs')
debugger.HandleCommand('command script add -f heap.cstr_refs cstr_refs')
debugger.HandleCommand('command script add -f heap.malloc_info malloc_info')
Modified: lldb/trunk/examples/darwin/heap_find/heap_find.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/examples/darwin/heap_find/heap_find.cpp?rev=155262&r1=155261&r2=155262&view=diff
==============================================================================
--- lldb/trunk/examples/darwin/heap_find/heap_find.cpp (original)
+++ lldb/trunk/examples/darwin/heap_find/heap_find.cpp Fri Apr 20 19:11:26 2012
@@ -73,6 +73,7 @@
#include <stdlib.h>
#include <vector>
+#define MAX_FRAMES 1024
typedef void range_callback_t (task_t task, void *baton, unsigned type, uint64_t ptr_addr, uint64_t ptr_size);
typedef void zone_callback_t (void *info, const malloc_zone_t *zone);
@@ -118,6 +119,8 @@
std::vector<malloc_match> g_matches;
const void *g_lookup_addr = 0;
+mach_vm_address_t g_stack_frames[MAX_FRAMES];
+uint32_t g_stack_frames_count = 0;
//----------------------------------------------------------------------
// task_peek
More information about the lldb-commits
mailing list