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Bug 1118228 - Add an lldb helper that allows calling functions without debug info. r=jrmuizel, r=ehsan

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This commit is contained in:
Markus Stange 2015-01-14 19:04:24 -05:00
parent 9b8c2dc37d
commit 68273bef8c
1 changed files with 26 additions and 0 deletions
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26
python/lldbutils/lldbutils/general.py
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@ -66,6 +66,31 @@ def prefcnt(debugger, command, result, dict):
else:
print "unknown mRefCnt type " + refcnt_type
# Used to work around http://llvm.org/bugs/show_bug.cgi?id=22211
def callfunc(debugger, command, result, dict):
"""Calls a function for which debugger information is unavailable by getting its address from the symbol table.
The function is assumed to return void."""
if '(' not in command:
print 'Usage: callfunc your_function(args)'
return
command_parts = command.split('(')
funcname = command_parts[0].strip()
args = command_parts[1]
target = debugger.GetSelectedTarget()
symbols = target.FindFunctions(funcname).symbols
if not symbols:
print 'Could not find a function symbol for a function called "%s"' % funcname
return
sym = symbols[0]
arg_types = '()'
if sym.name and sym.name.startswith(funcname + '('):
arg_types = sym.name[len(funcname):]
debugger.HandleCommand('print ((void(*)%s)0x%0x)(%s' % (arg_types, sym.addr.GetLoadAddress(target), args))
def init(debugger):
debugger.HandleCommand("type summary add nsAString_internal -F lldbutils.general.summarize_string")
debugger.HandleCommand("type summary add nsACString_internal -F lldbutils.general.summarize_string")
@ -78,3 +103,4 @@ def init(debugger):
debugger.HandleCommand("type synthetic add -x \"FallibleTArray<\" -l lldbutils.general.TArraySyntheticChildrenProvider")
debugger.HandleCommand("type synthetic add -x \"AutoFallibleTArray<\" -l lldbutils.general.TArraySyntheticChildrenProvider")
debugger.HandleCommand("command script add -f lldbutils.general.prefcnt -f lldbutils.general.prefcnt prefcnt")
debugger.HandleCommand("command script add -f lldbutils.general.callfunc -f lldbutils.general.callfunc callfunc")