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Current File : //usr/share/emscripten/tools/autodebugger.py
'''
Processes an LLVM assembly (.ll) file, adding debugging information.
You can then run the .ll file in the LLVM interpreter (lli) and
compare that to the output when compiled using emscripten.
Warning: You probably want to compile with SKIP_STACK_IN_SMALL=0! Otherwise
there may be weird errors.
'''
import os, sys, re
ALLOW_POINTERS = False
ALLOW_MISC = True
MEMCPY = False
MEMCPY2 = False
NO_DLMALLOC = True
POSTAMBLE = '''
@.emscripten.autodebug.str = private constant [10 x i8] c"AD:%d,%d\\0A\\00", align 1 ; [#uses=1]
@.emscripten.autodebug.str.f = private constant [11 x i8] c"AD:%d,%lf\\0A\\00", align 1 ; [#uses=1]
@.emscripten.autodebug.str.64 = private constant [13 x i8] c"AD:%d,%d,%d\\0A\\00", align 1 ; [#uses=1]
; [#uses=1]
define void @emscripten_autodebug_i64(i32 %line, i64 %value) {
entry:
%0 = trunc i64 %value to i32
%1 = lshr i64 %value, 32
%2 = trunc i64 %1 to i32
%3 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([13 x i8]* @.emscripten.autodebug.str.64, i32 0, i32 0), i32 %line, i32 %0, i32 %2) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i32(i32 %line, i32 %value) {
entry:
%0 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %value) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i16(i32 %line, i16 %value) {
entry:
%0 = zext i16 %value to i32 ; [#uses=1]
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %0) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i8(i32 %line, i8 %value) {
entry:
%0 = zext i8 %value to i32 ; [#uses=1]
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %0) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
; [#uses=1]
define void @emscripten_autodebug_float(i32 %line, float %value) {
entry:
%0 = fpext float %value to double ; [#uses=1]
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.emscripten.autodebug.str.f, i32 0, i32 0), i32 %line, double %0) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
; [#uses=1]
define void @emscripten_autodebug_double(i32 %line, double %value) {
entry:
%0 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.emscripten.autodebug.str.f, i32 0, i32 0), i32 %line, double %value) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
'''
POSTAMBLE_NEW = '''
@.emscripten.autodebug.str = private constant [10 x i8] c"AD:%d,%d\\0A\\00", align 1 ; [#uses=1]
@.emscripten.autodebug.str.2 = private constant [13 x i8] c"AD:%d,%d,%d\\0A\\00", align 1 ; [#uses=1]
@.emscripten.autodebug.str.f = private constant [11 x i8] c"AD:%d,%lf\\0A\\00", align 1 ; [#uses=1]
; [#uses=1]
define void @emscripten_autodebug_i64(i32 %line, i64 %value) {
%1 = trunc i64 %value to i32
%2 = lshr i64 %value, 32
%3 = trunc i64 %2 to i32
%4 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([13 x i8]* @.emscripten.autodebug.str.2, i32 0, i32 0), i32 %line, i32 %1, i32 %3) ; [#uses=0]
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i32(i32 %line, i32 %value) {
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %value) ; [#uses=0]
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i16(i32 %line, i16 %value) {
%1 = zext i16 %value to i32 ; [#uses=1]
%2 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %1) ; [#uses=0]
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i8(i32 %line, i8 %value) {
%1 = zext i8 %value to i32 ; [#uses=1]
%2 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %1) ; [#uses=0]
ret void
}
; [#uses=1]
define void @emscripten_autodebug_float(i32 %line, float %value) {
%1 = fpext float %value to double ; [#uses=1]
%2 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.emscripten.autodebug.str.f, i32 0, i32 0), i32 %line, double %1) ; [#uses=0]
ret void
}
; [#uses=1]
define void @emscripten_autodebug_double(i32 %line, double %value) {
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.emscripten.autodebug.str.f, i32 0, i32 0), i32 %line, double %value) ; [#uses=0]
ret void
}
'''
filename, ofilename = sys.argv[1], sys.argv[2]
f = open(filename, 'r')
data = f.read()
f.close()
if 'declare i32 @printf(' not in data:
POSTAMBLE += '''
; [#uses=1]
declare i32 @printf(i8*, ...)
'''
POSTAMBLE_NEW += '''
; [#uses=1]
declare i32 @printf(i8*, ...)
'''
LLVM_STYLE_OLD = '<label>' not in data and 'entry:' in data
if not LLVM_STYLE_OLD:
POSTAMBLE = POSTAMBLE_NEW
if MEMCPY:
POSTAMBLE = '''
@.emscripten.memcpy.str = private constant [7 x i8] c"MC:%d\\0A\\00", align 1 ; [#uses=1]
''' + POSTAMBLE + '''
; [#uses=1]
define void @emscripten_memcpy(i8* %destination, i8* %source, i32 %num, i32 %whati, i1 %sthis) nounwind {
entry:
%destination.addr = alloca i8*, align 4 ; [#uses=3]
%source.addr = alloca i8*, align 4 ; [#uses=2]
%num.addr = alloca i32, align 4 ; [#uses=3]
%i = alloca i32, align 4 ; [#uses=5]
%src = alloca i8*, align 4 ; [#uses=5]
%dst = alloca i8*, align 4 ; [#uses=4]
store i8* %destination, i8** %destination.addr, align 4
store i8* %source, i8** %source.addr, align 4
store i32 %num, i32* %num.addr, align 4
%tmp = load i8** %source.addr, align 4 ; [#uses=1]
store i8* %tmp, i8** %src, align 4
%tmp2 = load i8** %destination.addr, align 4 ; [#uses=1]
store i8* %tmp2, i8** %dst, align 4
store i32 0, i32* %i, align 4
%tmp31 = load i32* %i, align 4 ; [#uses=1]
%tmp42 = load i32* %num.addr, align 4 ; [#uses=1]
%cmp3 = icmp ult i32 %tmp31, %tmp42 ; [#uses=1]
br i1 %cmp3, label %for.body, label %for.end
for.body: ; preds = %for.body, %entry
%tmp5 = load i8** %src, align 4 ; [#uses=1]
%tmp6 = load i8* %tmp5 ; [#uses=1]
%conv = zext i8 %tmp6 to i32 ; [#uses=1]
%call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([7 x i8]* @.emscripten.memcpy.str, i32 0, i32 0), i32 %conv); [#uses=0]
%tmp7 = load i8** %src, align 4 ; [#uses=1]
%tmp8 = load i8* %tmp7 ; [#uses=1]
%tmp9 = load i8** %dst, align 4 ; [#uses=1]
store i8 %tmp8, i8* %tmp9
%tmp10 = load i32* %i, align 4 ; [#uses=1]
%inc = add i32 %tmp10, 1 ; [#uses=1]
store i32 %inc, i32* %i, align 4
%tmp11 = load i8** %src, align 4 ; [#uses=1]
%incdec.ptr = getelementptr inbounds i8* %tmp11, i32 1 ; [#uses=1]
store i8* %incdec.ptr, i8** %src, align 4
%tmp12 = load i8** %dst, align 4 ; [#uses=1]
%incdec.ptr13 = getelementptr inbounds i8* %tmp12, i32 1 ; [#uses=1]
store i8* %incdec.ptr13, i8** %dst, align 4
%tmp3 = load i32* %i, align 4 ; [#uses=1]
%tmp4 = load i32* %num.addr, align 4 ; [#uses=1]
%cmp = icmp ult i32 %tmp3, %tmp4 ; [#uses=1]
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body, %entry
%tmp14 = load i8** %destination.addr, align 4 ; [#uses=1]
ret void
}
'''
lines_added = 0
lines = data.split('\n')
in_func = False
added_entry = False
for i in range(len(lines)):
if MEMCPY:
if not lines[i].startswith('declare void'):
lines[i] = lines[i].replace('@llvm.memcpy.p0i8.p0i8.i32', '@emscripten_memcpy')
try:
pre = ''
if lines[i].startswith('define '):
in_func = True
if NO_DLMALLOC and ('@malloc(' in lines[i] or '@free(' in lines[i] or '@sys_alloc(' in lines[i] or '@segment_holding(' in lines[i] or '@init_top(' in lines[i] or '@add_segment(' in lines[i] or '@tmalloc_small(' in lines[i]):
in_func = False
if in_func:
added_entry = False
elif lines[i].startswith('}'):
in_func = False
elif in_func and not added_entry and ' = alloca' not in lines[i] and lines[i].startswith(' '):
# This is a good place to mark entry to this function
added_entry = True
index = i+1+lines_added
pre = ' call void @emscripten_autodebug_i32(i32 -1, i32 %d)' % index
elif in_func and lines[i].startswith(' ret '):
# This is a good place to mark entry to this function
index = i+1+lines_added
pre = ' call void @emscripten_autodebug_i32(i32 -2, i32 %d)' % index
if in_func:
m = re.match(' store (?P<type>i64|i32|i16|i8|float|double|%?[\w\.\*]+) (?P<var>%?[\w.+_]+), .*', lines[i])
if m:
index = i+1+lines_added
if m.group('type') in ['i8', 'i16', 'i32', 'i64', 'float', 'double']:
lines[i] += '\n call void @emscripten_autodebug_%s(i32 %d, %s %s)' % (m.group('type'), index, m.group('type'), m.group('var'))
lines_added += 1
elif ALLOW_POINTERS and m.group('type').endswith('*') and m.group('type').count('*') == 1:
lines[i] += '\n %%ead.%d = ptrtoint %s %s to i32' % (index, m.group('type'), m.group('var'))
lines[i] += '\n call void @emscripten_autodebug_i32(i32 %d, i32 %%ead.%d)' % (index, index)
lines_added += 2
continue
m = re.match(' %(?P<var>[\w_.]+) = load (?P<type>i64|i32|i16|i8|float|double+)\* [^(].*.*', lines[i])
if m:
index = i+1+lines_added
lines[i] += '\n call void @emscripten_autodebug_%s(i32 %d, %s %%%s)' % (m.group('type'), index, m.group('type'), m.group('var'))
lines_added += 1
continue
if ALLOW_MISC:
# call is risky - return values can be i32 (i8*) (i16)
m = re.match(' %(?P<var>[\w_.]+) = (mul|add) (nsw )?(?P<type>i64|i32|i16|i8|float|double+) .*', lines[i])
if m:
index = i+1+lines_added
lines[i] += '\n call void @emscripten_autodebug_%s(i32 %d, %s %%%s)' % (m.group('type'), index, m.group('type'), m.group('var'))
lines_added += 1
continue
if MEMCPY2:
m = re.match(' call void @llvm\.memcpy\.p0i8\.p0i8\.i32\(i8\* %(?P<dst>[\w_.]+), i8\* %(?P<src>[\w_.]+), i32 8, i32 (?P<align>\d+),.*', lines[i])
if m:
index = i+1+lines_added
lines[i] += '\n %%adtemp%d = load i8* %%%s, align 1' % (index, m.group('src')) + \
'\n call void @emscripten_autodebug_i8(i32 %d, i8 %%adtemp%d)' % (index, index)
lines_added += 3
continue
finally:
if len(pre) > 0:
lines[i] = pre + '\n' + lines[i]
lines_added += 1
f = open(ofilename, 'w')
ll = '\n'.join(lines)
meta_start = ll.find('\n!')
f.write(ll[:meta_start] + '\n' + POSTAMBLE + '\n' + ll[meta_start:])
f.close()
print 'Success.'
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